./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-alloc-spinlock_drivers-net-ethernet-sun-sunhme.cil.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-alloc-spinlock_drivers-net-ethernet-sun-sunhme.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash e184773994bf5ba427e3ad6843df80bcf1aa90cb50c2ace36ee6ac9939c1f916 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:50:30,831 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:50:30,833 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:50:30,890 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:50:30,890 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:50:30,891 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:50:30,893 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:50:30,896 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:50:30,900 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:50:30,901 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:50:30,903 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:50:30,904 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:50:30,905 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:50:30,906 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:50:30,908 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:50:30,909 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:50:30,910 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:50:30,912 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:50:30,914 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:50:30,917 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:50:30,919 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:50:30,924 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:50:30,926 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:50:30,927 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:50:30,931 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:50:30,931 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:50:30,932 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:50:30,933 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:50:30,934 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:50:30,935 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:50:30,935 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:50:30,936 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:50:30,937 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:50:30,948 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:50:30,949 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:50:30,950 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:50:30,950 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:50:30,951 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:50:30,951 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:50:30,952 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:50:30,953 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:50:30,960 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-12 22:50:31,009 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:50:31,009 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:50:31,010 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:50:31,010 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:50:31,010 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:50:31,011 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:50:31,011 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:50:31,011 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 22:50:31,011 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:50:31,012 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:50:31,012 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 22:50:31,012 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 22:50:31,012 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:50:31,012 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 22:50:31,013 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 22:50:31,013 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 22:50:31,013 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:50:31,014 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 22:50:31,014 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:50:31,014 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:50:31,022 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:50:31,022 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:50:31,022 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:50:31,023 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:50:31,023 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:50:31,023 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:50:31,023 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:50:31,024 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:50:31,024 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:50:31,025 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:50:31,025 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:50:31,025 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:50:31,025 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 22:50:31,025 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 22:50:31,026 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:50:31,026 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:50:31,027 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:50:31,027 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_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e184773994bf5ba427e3ad6843df80bcf1aa90cb50c2ace36ee6ac9939c1f916 [2021-11-12 22:50:31,286 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:50:31,305 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:50:31,308 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:50:31,309 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:50:31,310 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:50:31,311 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-alloc-spinlock_drivers-net-ethernet-sun-sunhme.cil.i [2021-11-12 22:50:31,374 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/data/270b1d07e/9364861472f34aa29a387050ed38e460/FLAG5c55e3358 [2021-11-12 22:50:32,267 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:50:32,268 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-alloc-spinlock_drivers-net-ethernet-sun-sunhme.cil.i [2021-11-12 22:50:32,323 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/data/270b1d07e/9364861472f34aa29a387050ed38e460/FLAG5c55e3358 [2021-11-12 22:50:32,701 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/data/270b1d07e/9364861472f34aa29a387050ed38e460 [2021-11-12 22:50:32,704 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:50:32,705 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:50:32,707 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:50:32,707 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:50:32,710 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:50:32,711 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:50:32" (1/1) ... [2021-11-12 22:50:32,712 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29a61819 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:50:32, skipping insertion in model container [2021-11-12 22:50:32,713 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:50:32" (1/1) ... [2021-11-12 22:50:32,720 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:50:32,877 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:50:34,750 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:50:34,753 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:50:34,851 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:50:34,852 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:50:34,888 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:50:34,889 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:50:35,838 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-alloc-spinlock_drivers-net-ethernet-sun-sunhme.cil.i[340444,340457] [2021-11-12 22:50:35,841 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-alloc-spinlock_drivers-net-ethernet-sun-sunhme.cil.i[340589,340602] [2021-11-12 22:50:35,865 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:50:35,917 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-12 22:50:35,918 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4fac85b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:50:35, skipping insertion in model container [2021-11-12 22:50:35,918 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:50:35,919 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 22:50:35,921 INFO L158 Benchmark]: Toolchain (without parser) took 3214.39ms. Allocated memory was 115.3MB in the beginning and 138.4MB in the end (delta: 23.1MB). Free memory was 70.5MB in the beginning and 77.6MB in the end (delta: -7.1MB). Peak memory consumption was 46.2MB. Max. memory is 16.1GB. [2021-11-12 22:50:35,922 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 115.3MB. Free memory is still 69.1MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:50:35,923 INFO L158 Benchmark]: CACSL2BoogieTranslator took 3211.66ms. Allocated memory was 115.3MB in the beginning and 138.4MB in the end (delta: 23.1MB). Free memory was 70.5MB in the beginning and 77.6MB in the end (delta: -7.1MB). Peak memory consumption was 46.2MB. Max. memory is 16.1GB. [2021-11-12 22:50:35,925 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 115.3MB. Free memory is still 69.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 3211.66ms. Allocated memory was 115.3MB in the beginning and 138.4MB in the end (delta: 23.1MB). Free memory was 70.5MB in the beginning and 77.6MB in the end (delta: -7.1MB). Peak memory consumption was 46.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 7450]: 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_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-alloc-spinlock_drivers-net-ethernet-sun-sunhme.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash e184773994bf5ba427e3ad6843df80bcf1aa90cb50c2ace36ee6ac9939c1f916 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:50:38,205 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:50:38,209 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:50:38,267 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:50:38,268 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:50:38,272 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:50:38,274 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:50:38,278 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:50:38,281 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:50:38,289 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:50:38,290 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:50:38,292 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:50:38,293 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:50:38,296 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:50:38,301 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:50:38,307 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:50:38,309 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:50:38,310 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:50:38,312 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:50:38,320 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:50:38,322 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:50:38,323 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:50:38,326 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:50:38,328 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:50:38,336 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:50:38,337 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:50:38,337 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:50:38,339 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:50:38,340 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:50:38,341 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:50:38,341 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:50:38,342 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:50:38,344 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:50:38,345 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:50:38,347 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:50:38,347 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:50:38,348 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:50:38,348 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:50:38,349 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:50:38,350 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:50:38,351 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:50:38,356 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-12 22:50:38,397 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:50:38,398 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:50:38,399 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:50:38,399 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:50:38,400 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:50:38,400 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:50:38,400 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:50:38,400 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:50:38,400 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:50:38,401 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:50:38,403 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:50:38,404 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:50:38,404 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:50:38,404 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:50:38,404 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:50:38,405 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:50:38,405 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 22:50:38,405 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 22:50:38,405 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:50:38,405 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:50:38,406 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:50:38,406 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:50:38,406 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 22:50:38,406 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:50:38,407 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:50:38,407 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:50:38,407 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:50:38,407 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:50:38,408 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 22:50:38,408 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 22:50:38,408 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:50:38,408 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:50:38,408 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:50:38,409 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_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e184773994bf5ba427e3ad6843df80bcf1aa90cb50c2ace36ee6ac9939c1f916 [2021-11-12 22:50:38,796 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:50:38,819 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:50:38,822 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:50:38,824 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:50:38,824 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:50:38,826 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-alloc-spinlock_drivers-net-ethernet-sun-sunhme.cil.i [2021-11-12 22:50:38,908 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/data/bf5cbb376/45ab86f7a95e4416b31e2a75094bd3c0/FLAG281af555e [2021-11-12 22:50:39,941 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:50:39,941 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-alloc-spinlock_drivers-net-ethernet-sun-sunhme.cil.i [2021-11-12 22:50:40,012 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/data/bf5cbb376/45ab86f7a95e4416b31e2a75094bd3c0/FLAG281af555e [2021-11-12 22:50:40,319 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/data/bf5cbb376/45ab86f7a95e4416b31e2a75094bd3c0 [2021-11-12 22:50:40,321 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:50:40,324 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:50:40,327 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:50:40,327 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:50:40,330 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:50:40,332 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:50:40" (1/1) ... [2021-11-12 22:50:40,333 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d1d34be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:50:40, skipping insertion in model container [2021-11-12 22:50:40,333 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:50:40" (1/1) ... [2021-11-12 22:50:40,340 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:50:40,599 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:50:43,630 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-alloc-spinlock_drivers-net-ethernet-sun-sunhme.cil.i[340444,340457] [2021-11-12 22:50:43,633 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-alloc-spinlock_drivers-net-ethernet-sun-sunhme.cil.i[340589,340602] [2021-11-12 22:50:43,648 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:50:43,686 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 22:50:43,760 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:50:44,194 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-alloc-spinlock_drivers-net-ethernet-sun-sunhme.cil.i[340444,340457] [2021-11-12 22:50:44,195 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-alloc-spinlock_drivers-net-ethernet-sun-sunhme.cil.i[340589,340602] [2021-11-12 22:50:44,200 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:50:44,255 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:50:44,699 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-alloc-spinlock_drivers-net-ethernet-sun-sunhme.cil.i[340444,340457] [2021-11-12 22:50:44,700 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-alloc-spinlock_drivers-net-ethernet-sun-sunhme.cil.i[340589,340602] [2021-11-12 22:50:44,705 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:50:45,124 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:50:45,124 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:50:45 WrapperNode [2021-11-12 22:50:45,125 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:50:45,126 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:50:45,126 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:50:45,126 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:50:45,133 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:50:45" (1/1) ... [2021-11-12 22:50:45,275 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:50:45" (1/1) ... [2021-11-12 22:50:45,472 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:50:45,473 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:50:45,473 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:50:45,473 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:50:45,482 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:50:45" (1/1) ... [2021-11-12 22:50:45,483 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:50:45" (1/1) ... [2021-11-12 22:50:45,548 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:50:45" (1/1) ... [2021-11-12 22:50:45,548 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:50:45" (1/1) ... [2021-11-12 22:50:45,683 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:50:45" (1/1) ... [2021-11-12 22:50:45,707 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:50:45" (1/1) ... [2021-11-12 22:50:45,740 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:50:45" (1/1) ... [2021-11-12 22:50:45,789 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:50:45,792 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:50:45,793 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:50:45,793 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:50:45,794 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:50:45" (1/1) ... [2021-11-12 22:50:45,801 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:50:45,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:50:45,828 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:50:45,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:50:45,883 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2021-11-12 22:50:45,884 INFO L130 BoogieDeclarations]: Found specification of procedure BB_GET_BIT2 [2021-11-12 22:50:45,884 INFO L138 BoogieDeclarations]: Found implementation of procedure BB_GET_BIT2 [2021-11-12 22:50:45,884 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_skb [2021-11-12 22:50:45,884 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_skb [2021-11-12 22:50:45,885 INFO L130 BoogieDeclarations]: Found specification of procedure pci_release_regions [2021-11-12 22:50:45,885 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_release_regions [2021-11-12 22:50:45,885 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-12 22:50:45,885 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-12 22:50:45,885 INFO L130 BoogieDeclarations]: Found specification of procedure happy_meal_open [2021-11-12 22:50:45,885 INFO L138 BoogieDeclarations]: Found implementation of procedure happy_meal_open [2021-11-12 22:50:45,886 INFO L130 BoogieDeclarations]: Found specification of procedure happy_meal_poll_stop [2021-11-12 22:50:45,886 INFO L138 BoogieDeclarations]: Found implementation of procedure happy_meal_poll_stop [2021-11-12 22:50:45,886 INFO L130 BoogieDeclarations]: Found specification of procedure is_quattro_p [2021-11-12 22:50:45,886 INFO L138 BoogieDeclarations]: Found implementation of procedure is_quattro_p [2021-11-12 22:50:45,886 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2021-11-12 22:50:45,886 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2021-11-12 22:50:45,887 INFO L130 BoogieDeclarations]: Found specification of procedure happy_meal_close [2021-11-12 22:50:45,887 INFO L138 BoogieDeclarations]: Found implementation of procedure happy_meal_close [2021-11-12 22:50:45,887 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-12 22:50:45,887 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-12 22:50:45,887 INFO L130 BoogieDeclarations]: Found specification of procedure free_irq [2021-11-12 22:50:45,887 INFO L138 BoogieDeclarations]: Found implementation of procedure free_irq [2021-11-12 22:50:45,888 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_irq_87 [2021-11-12 22:50:45,888 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_irq_87 [2021-11-12 22:50:45,888 INFO L130 BoogieDeclarations]: Found specification of procedure happy_meal_set_multicast [2021-11-12 22:50:45,888 INFO L138 BoogieDeclarations]: Found implementation of procedure happy_meal_set_multicast [2021-11-12 22:50:45,888 INFO L130 BoogieDeclarations]: Found specification of procedure valid_dma_direction [2021-11-12 22:50:45,888 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_dma_direction [2021-11-12 22:50:45,889 INFO L130 BoogieDeclarations]: Found specification of procedure BB_PUT_BIT [2021-11-12 22:50:45,889 INFO L138 BoogieDeclarations]: Found implementation of procedure BB_PUT_BIT [2021-11-12 22:50:45,889 INFO L130 BoogieDeclarations]: Found specification of procedure crc32_le [2021-11-12 22:50:45,889 INFO L138 BoogieDeclarations]: Found implementation of procedure crc32_le [2021-11-12 22:50:45,890 INFO L130 BoogieDeclarations]: Found specification of procedure happy_meal_begin_auto_negotiation [2021-11-12 22:50:45,890 INFO L138 BoogieDeclarations]: Found implementation of procedure happy_meal_begin_auto_negotiation [2021-11-12 22:50:45,890 INFO L130 BoogieDeclarations]: Found specification of procedure happy_meal_get_counters [2021-11-12 22:50:45,890 INFO L138 BoogieDeclarations]: Found implementation of procedure happy_meal_get_counters [2021-11-12 22:50:45,890 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~structbegin~C_INT~structend~~TO~C_INT [2021-11-12 22:50:45,891 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~structbegin~C_INT~structend~~TO~C_INT [2021-11-12 22:50:45,891 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_happy_lock_of_happy_meal [2021-11-12 22:50:45,891 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_happy_lock_of_happy_meal [2021-11-12 22:50:45,891 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2021-11-12 22:50:45,891 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_xmalloc [2021-11-12 22:50:45,891 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2021-11-12 22:50:45,892 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2021-11-12 22:50:45,892 INFO L130 BoogieDeclarations]: Found specification of procedure skb_end_pointer [2021-11-12 22:50:45,892 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_end_pointer [2021-11-12 22:50:45,893 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_del_timer [2021-11-12 22:50:45,893 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_del_timer [2021-11-12 22:50:45,894 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2021-11-12 22:50:45,895 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_validate_addr [2021-11-12 22:50:45,895 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-12 22:50:45,896 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-12 22:50:45,896 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-12 22:50:45,896 INFO L130 BoogieDeclarations]: Found specification of procedure iounmap [2021-11-12 22:50:45,896 INFO L138 BoogieDeclarations]: Found implementation of procedure iounmap [2021-11-12 22:50:45,896 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_happy_lock_of_happy_meal [2021-11-12 22:50:45,897 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_happy_lock_of_happy_meal [2021-11-12 22:50:45,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 22:50:45,898 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-12 22:50:45,898 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-12 22:50:45,898 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-11-12 22:50:45,898 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-11-12 22:50:45,898 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2021-11-12 22:50:45,899 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2021-11-12 22:50:45,899 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume [2021-11-12 22:50:45,899 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume [2021-11-12 22:50:45,900 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~C_ULONG~X~C_ULONG~X~C_INT~X~$Pointer$~TO~~dma_addr_t~0 [2021-11-12 22:50:45,900 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~C_ULONG~X~C_ULONG~X~C_INT~X~$Pointer$~TO~~dma_addr_t~0 [2021-11-12 22:50:45,900 INFO L130 BoogieDeclarations]: Found specification of procedure __phys_addr [2021-11-12 22:50:45,900 INFO L138 BoogieDeclarations]: Found implementation of procedure __phys_addr [2021-11-12 22:50:45,901 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_after_alloc [2021-11-12 22:50:45,901 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_after_alloc [2021-11-12 22:50:45,901 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_interrupt_context [2021-11-12 22:50:45,901 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_interrupt_context [2021-11-12 22:50:45,901 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_set_drvdata [2021-11-12 22:50:45,901 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_set_drvdata [2021-11-12 22:50:45,902 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_err_code [2021-11-12 22:50:45,902 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_err_code [2021-11-12 22:50:45,902 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2021-11-12 22:50:45,902 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2021-11-12 22:50:45,902 INFO L130 BoogieDeclarations]: Found specification of procedure set_happy_link_modes [2021-11-12 22:50:45,903 INFO L138 BoogieDeclarations]: Found implementation of procedure set_happy_link_modes [2021-11-12 22:50:45,903 INFO L130 BoogieDeclarations]: Found specification of procedure happy_meal_tcvr_reset [2021-11-12 22:50:45,903 INFO L138 BoogieDeclarations]: Found implementation of procedure happy_meal_tcvr_reset [2021-11-12 22:50:45,904 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-12 22:50:45,904 INFO L130 BoogieDeclarations]: Found specification of procedure happy_meal_tx_timeout [2021-11-12 22:50:45,904 INFO L138 BoogieDeclarations]: Found implementation of procedure happy_meal_tx_timeout [2021-11-12 22:50:45,905 INFO L130 BoogieDeclarations]: Found specification of procedure dma_map_single_attrs [2021-11-12 22:50:45,905 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_map_single_attrs [2021-11-12 22:50:45,905 INFO L130 BoogieDeclarations]: Found specification of procedure happy_meal_tcvr_read [2021-11-12 22:50:45,905 INFO L138 BoogieDeclarations]: Found implementation of procedure happy_meal_tcvr_read [2021-11-12 22:50:45,905 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-12 22:50:45,906 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-12 22:50:45,906 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2021-11-12 22:50:45,906 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2021-11-12 22:50:45,906 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-12 22:50:45,906 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-12 22:50:45,906 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-12 22:50:45,906 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-12 22:50:45,907 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-12 22:50:45,907 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-12 22:50:45,907 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_exclusive_spin_is_locked [2021-11-12 22:50:45,907 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_exclusive_spin_is_locked [2021-11-12 22:50:45,908 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert [2021-11-12 22:50:45,908 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert [2021-11-12 22:50:45,908 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~dma_addr_t~0~X~C_ULONG~X~C_INT~X~$Pointer$~TO~VOID [2021-11-12 22:50:45,908 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~dma_addr_t~0~X~C_ULONG~X~C_INT~X~$Pointer$~TO~VOID [2021-11-12 22:50:45,908 INFO L130 BoogieDeclarations]: Found specification of procedure debug_dma_map_page [2021-11-12 22:50:45,909 INFO L138 BoogieDeclarations]: Found implementation of procedure debug_dma_map_page [2021-11-12 22:50:45,910 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-11-12 22:50:45,912 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-11-12 22:50:45,913 INFO L130 BoogieDeclarations]: Found specification of procedure skb_put [2021-11-12 22:50:45,914 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_put [2021-11-12 22:50:45,914 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_netdev [2021-11-12 22:50:45,914 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_netdev [2021-11-12 22:50:45,915 INFO L130 BoogieDeclarations]: Found specification of procedure writel [2021-11-12 22:50:45,915 INFO L138 BoogieDeclarations]: Found implementation of procedure writel [2021-11-12 22:50:45,916 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-12 22:50:45,916 INFO L130 BoogieDeclarations]: Found specification of procedure is_lucent_phy [2021-11-12 22:50:45,923 INFO L138 BoogieDeclarations]: Found implementation of procedure is_lucent_phy [2021-11-12 22:50:45,923 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:50:45,923 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:50:45,924 INFO L130 BoogieDeclarations]: Found specification of procedure hme_read_desc32 [2021-11-12 22:50:45,924 INFO L138 BoogieDeclarations]: Found implementation of procedure hme_read_desc32 [2021-11-12 22:50:45,924 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-12 22:50:45,924 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_strcpy [2021-11-12 22:50:45,924 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_strcpy [2021-11-12 22:50:45,924 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-12 22:50:45,924 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-12 22:50:45,925 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-12 22:50:45,925 INFO L130 BoogieDeclarations]: Found specification of procedure happy_meal_clean_rings [2021-11-12 22:50:45,925 INFO L138 BoogieDeclarations]: Found implementation of procedure happy_meal_clean_rings [2021-11-12 22:50:45,925 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-12 22:50:45,925 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-12 22:50:45,925 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-12 22:50:45,926 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-12 22:50:45,926 INFO L130 BoogieDeclarations]: Found specification of procedure kmemcheck_mark_initialized [2021-11-12 22:50:45,926 INFO L138 BoogieDeclarations]: Found implementation of procedure kmemcheck_mark_initialized [2021-11-12 22:50:45,926 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_process_context [2021-11-12 22:50:45,926 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_process_context [2021-11-12 22:50:45,926 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-12 22:50:45,926 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-12 22:50:45,927 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2021-11-12 22:50:45,927 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2021-11-12 22:50:45,927 INFO L130 BoogieDeclarations]: Found specification of procedure del_timer [2021-11-12 22:50:45,927 INFO L138 BoogieDeclarations]: Found implementation of procedure del_timer [2021-11-12 22:50:45,927 INFO L130 BoogieDeclarations]: Found specification of procedure debug_dma_unmap_page [2021-11-12 22:50:45,927 INFO L138 BoogieDeclarations]: Found implementation of procedure debug_dma_unmap_page [2021-11-12 22:50:45,927 INFO L130 BoogieDeclarations]: Found specification of procedure dma_unmap_single_attrs [2021-11-12 22:50:45,928 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_unmap_single_attrs [2021-11-12 22:50:45,928 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:50:45,928 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-12 22:50:45,928 INFO L130 BoogieDeclarations]: Found specification of procedure add_timer [2021-11-12 22:50:45,928 INFO L138 BoogieDeclarations]: Found implementation of procedure add_timer [2021-11-12 22:50:45,928 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-12 22:50:45,929 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-12 22:50:45,929 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-12 22:50:45,929 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_irq_86 [2021-11-12 22:50:45,929 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_irq_86 [2021-11-12 22:50:45,929 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-12 22:50:45,929 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-12 22:50:45,929 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~dma_addr_t~0~X~C_ULONG~X~C_INT~TO~VOID [2021-11-12 22:50:45,930 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~dma_addr_t~0~X~C_ULONG~X~C_INT~TO~VOID [2021-11-12 22:50:45,930 INFO L130 BoogieDeclarations]: Found specification of procedure happy_meal_stop [2021-11-12 22:50:45,930 INFO L138 BoogieDeclarations]: Found implementation of procedure happy_meal_stop [2021-11-12 22:50:45,930 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-11-12 22:50:45,930 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-11-12 22:50:45,930 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_positive_int [2021-11-12 22:50:45,930 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_positive_int [2021-11-12 22:50:45,931 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_irq [2021-11-12 22:50:45,931 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_irq [2021-11-12 22:50:45,931 INFO L130 BoogieDeclarations]: Found specification of procedure happy_meal_pci_remove [2021-11-12 22:50:45,931 INFO L138 BoogieDeclarations]: Found implementation of procedure happy_meal_pci_remove [2021-11-12 22:50:45,931 INFO L130 BoogieDeclarations]: Found specification of procedure happy_meal_init [2021-11-12 22:50:45,931 INFO L138 BoogieDeclarations]: Found implementation of procedure happy_meal_init [2021-11-12 22:50:45,932 INFO L130 BoogieDeclarations]: Found specification of procedure skb_reserve [2021-11-12 22:50:45,932 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_reserve [2021-11-12 22:50:45,932 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2021-11-12 22:50:45,933 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2021-11-12 22:50:45,933 INFO L130 BoogieDeclarations]: Found specification of procedure happy_meal_tcvr_write [2021-11-12 22:50:45,933 INFO L138 BoogieDeclarations]: Found implementation of procedure happy_meal_tcvr_write [2021-11-12 22:50:45,933 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~C_INT [2021-11-12 22:50:45,933 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~C_INT [2021-11-12 22:50:45,933 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-12 22:50:45,934 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-12 22:50:45,934 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-12 22:50:45,934 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-12 22:50:45,934 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-12 22:50:45,934 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-12 22:50:45,934 INFO L130 BoogieDeclarations]: Found specification of procedure dev_kfree_skb_any [2021-11-12 22:50:45,934 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_kfree_skb_any [2021-11-12 22:50:45,935 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2021-11-12 22:50:45,935 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2021-11-12 22:50:45,935 INFO L130 BoogieDeclarations]: Found specification of procedure ethtool_cmd_speed [2021-11-12 22:50:45,935 INFO L138 BoogieDeclarations]: Found implementation of procedure ethtool_cmd_speed [2021-11-12 22:50:45,935 INFO L130 BoogieDeclarations]: Found specification of procedure readl [2021-11-12 22:50:45,935 INFO L138 BoogieDeclarations]: Found implementation of procedure readl [2021-11-12 22:50:45,935 INFO L130 BoogieDeclarations]: Found specification of procedure dma_unmap_page [2021-11-12 22:50:45,936 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_unmap_page [2021-11-12 22:50:45,936 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2021-11-12 22:50:45,936 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2021-11-12 22:50:45,936 INFO L130 BoogieDeclarations]: Found specification of procedure readb [2021-11-12 22:50:45,936 INFO L138 BoogieDeclarations]: Found implementation of procedure readb [2021-11-12 22:50:45,936 INFO L130 BoogieDeclarations]: Found specification of procedure happy_meal_transceiver_check [2021-11-12 22:50:45,937 INFO L138 BoogieDeclarations]: Found implementation of procedure happy_meal_transceiver_check [2021-11-12 22:50:50,817 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-12 22:51:31,155 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:51:31,155 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 22:51:31,161 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:51:31 BoogieIcfgContainer [2021-11-12 22:51:31,161 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:51:31,164 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:51:31,164 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:51:31,167 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:51:31,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:50:40" (1/3) ... [2021-11-12 22:51:31,168 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d3e29cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:51:31, skipping insertion in model container [2021-11-12 22:51:31,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:50:45" (2/3) ... [2021-11-12 22:51:31,169 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d3e29cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:51:31, skipping insertion in model container [2021-11-12 22:51:31,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:51:31" (3/3) ... [2021-11-12 22:51:31,170 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.14_linux-alloc-spinlock_drivers-net-ethernet-sun-sunhme.cil.i [2021-11-12 22:51:31,176 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:51:31,177 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 22:51:31,251 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:51:31,258 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 22:51:31,258 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 22:51:31,327 INFO L276 IsEmpty]: Start isEmpty. Operand has 1847 states, 1225 states have (on average 1.2938775510204081) internal successors, (1585), 1272 states have internal predecessors, (1585), 533 states have call successors, (533), 88 states have call predecessors, (533), 87 states have return successors, (529), 515 states have call predecessors, (529), 529 states have call successors, (529) [2021-11-12 22:51:31,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-12 22:51:31,346 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:51:31,348 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:51:31,348 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:51:31,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:51:31,354 INFO L85 PathProgramCache]: Analyzing trace with hash 222572874, now seen corresponding path program 1 times [2021-11-12 22:51:31,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:51:31,379 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1905028691] [2021-11-12 22:51:31,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:51:31,380 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:51:31,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:51:31,383 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:51:31,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 22:51:35,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:51:35,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 1596 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-12 22:51:35,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:51:35,961 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-12 22:51:35,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:51:36,344 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-12 22:51:36,345 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:51:36,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1905028691] [2021-11-12 22:51:36,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1905028691] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:51:36,346 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:51:36,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-12 22:51:36,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667711363] [2021-11-12 22:51:36,349 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:51:36,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 22:51:36,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:51:36,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 22:51:36,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 22:51:36,390 INFO L87 Difference]: Start difference. First operand has 1847 states, 1225 states have (on average 1.2938775510204081) internal successors, (1585), 1272 states have internal predecessors, (1585), 533 states have call successors, (533), 88 states have call predecessors, (533), 87 states have return successors, (529), 515 states have call predecessors, (529), 529 states have call successors, (529) Second operand has 2 states, 2 states have (on average 26.5) internal successors, (53), 2 states have internal predecessors, (53), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-12 22:51:36,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:51:36,599 INFO L93 Difference]: Finished difference Result 3664 states and 5290 transitions. [2021-11-12 22:51:36,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 22:51:36,602 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 26.5) internal successors, (53), 2 states have internal predecessors, (53), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 120 [2021-11-12 22:51:36,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:51:36,644 INFO L225 Difference]: With dead ends: 3664 [2021-11-12 22:51:36,645 INFO L226 Difference]: Without dead ends: 1692 [2021-11-12 22:51:36,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 22:51:36,669 INFO L933 BasicCegarLoop]: 2634 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2634 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 21.01ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-12 22:51:36,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 2634 Invalid, 0 Unknown, 0 Unchecked, 21.01ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-12 22:51:36,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1692 states. [2021-11-12 22:51:36,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1692 to 1692. [2021-11-12 22:51:36,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1692 states, 1125 states have (on average 1.2746666666666666) internal successors, (1434), 1169 states have internal predecessors, (1434), 481 states have call successors, (481), 85 states have call predecessors, (481), 85 states have return successors, (480), 466 states have call predecessors, (480), 480 states have call successors, (480) [2021-11-12 22:51:36,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1692 states to 1692 states and 2395 transitions. [2021-11-12 22:51:36,869 INFO L78 Accepts]: Start accepts. Automaton has 1692 states and 2395 transitions. Word has length 120 [2021-11-12 22:51:36,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:51:36,871 INFO L470 AbstractCegarLoop]: Abstraction has 1692 states and 2395 transitions. [2021-11-12 22:51:36,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 26.5) internal successors, (53), 2 states have internal predecessors, (53), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-12 22:51:36,872 INFO L276 IsEmpty]: Start isEmpty. Operand 1692 states and 2395 transitions. [2021-11-12 22:51:36,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-12 22:51:36,877 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:51:36,878 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:51:36,932 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 22:51:37,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:51:37,091 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:51:37,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:51:37,092 INFO L85 PathProgramCache]: Analyzing trace with hash -292992514, now seen corresponding path program 1 times [2021-11-12 22:51:37,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:51:37,095 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1400049355] [2021-11-12 22:51:37,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:51:37,096 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:51:37,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:51:37,097 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:51:37,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 22:51:40,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:51:41,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 1600 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-12 22:51:41,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:51:42,051 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 76 proven. 3 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-12 22:51:42,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:51:43,130 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-12 22:51:43,131 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:51:43,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1400049355] [2021-11-12 22:51:43,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1400049355] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:51:43,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2111463940] [2021-11-12 22:51:43,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:51:43,132 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:51:43,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:51:43,134 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:51:43,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2021-11-12 22:51:45,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:51:45,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 1600 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:51:45,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:51:46,144 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-12 22:51:46,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:51:46,862 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-12 22:51:46,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2111463940] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:51:46,863 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:51:46,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [8, 8] total 12 [2021-11-12 22:51:46,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299767483] [2021-11-12 22:51:46,864 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:51:46,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:51:46,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:51:46,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:51:46,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:51:46,868 INFO L87 Difference]: Start difference. First operand 1692 states and 2395 transitions. Second operand has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 3 states have call successors, (26), 3 states have call predecessors, (26), 4 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-12 22:51:49,257 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.38s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:51:54,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:51:54,515 INFO L93 Difference]: Finished difference Result 3364 states and 4776 transitions. [2021-11-12 22:51:54,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:51:54,516 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 3 states have call successors, (26), 3 states have call predecessors, (26), 4 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) Word has length 121 [2021-11-12 22:51:54,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:51:54,538 INFO L225 Difference]: With dead ends: 3364 [2021-11-12 22:51:54,538 INFO L226 Difference]: Without dead ends: 1692 [2021-11-12 22:51:54,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 470 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:51:54,555 INFO L933 BasicCegarLoop]: 2393 mSDtfsCounter, 2342 mSDsluCounter, 1431 mSDsCounter, 0 mSdLazyCounter, 963 mSolverCounterSat, 15 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6644.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2342 SdHoareTripleChecker+Valid, 3824 SdHoareTripleChecker+Invalid, 979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 33.47ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 963 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7352.12ms IncrementalHoareTripleChecker+Time [2021-11-12 22:51:54,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2342 Valid, 3824 Invalid, 979 Unknown, 0 Unchecked, 33.47ms Time], IncrementalHoareTripleChecker [15 Valid, 963 Invalid, 1 Unknown, 0 Unchecked, 7352.12ms Time] [2021-11-12 22:51:54,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1692 states. [2021-11-12 22:51:54,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1692 to 1692. [2021-11-12 22:51:54,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1692 states, 1125 states have (on average 1.2737777777777777) internal successors, (1433), 1169 states have internal predecessors, (1433), 481 states have call successors, (481), 85 states have call predecessors, (481), 85 states have return successors, (480), 466 states have call predecessors, (480), 480 states have call successors, (480) [2021-11-12 22:51:54,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1692 states to 1692 states and 2394 transitions. [2021-11-12 22:51:54,753 INFO L78 Accepts]: Start accepts. Automaton has 1692 states and 2394 transitions. Word has length 121 [2021-11-12 22:51:54,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:51:54,754 INFO L470 AbstractCegarLoop]: Abstraction has 1692 states and 2394 transitions. [2021-11-12 22:51:54,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 3 states have call successors, (26), 3 states have call predecessors, (26), 4 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-12 22:51:54,755 INFO L276 IsEmpty]: Start isEmpty. Operand 1692 states and 2394 transitions. [2021-11-12 22:51:54,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-12 22:51:54,757 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:51:54,758 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:51:54,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2021-11-12 22:51:55,036 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 22:51:55,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:51:55,181 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:51:55,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:51:55,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1502207497, now seen corresponding path program 1 times [2021-11-12 22:51:55,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:51:55,188 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [941437635] [2021-11-12 22:51:55,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:51:55,188 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:51:55,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:51:55,192 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:51:55,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 22:51:58,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:51:59,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 1601 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-12 22:51:59,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:51:59,798 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 76 proven. 3 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-12 22:51:59,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:52:00,654 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-12 22:52:00,654 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:52:00,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [941437635] [2021-11-12 22:52:00,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [941437635] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:52:00,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [826040730] [2021-11-12 22:52:00,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:52:00,655 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:52:00,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:52:00,680 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:52:00,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-11-12 22:52:02,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:52:02,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 1601 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:52:02,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:52:03,248 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-12 22:52:03,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:52:03,817 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-12 22:52:03,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [826040730] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:52:03,817 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:52:03,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [8, 8] total 12 [2021-11-12 22:52:03,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21203383] [2021-11-12 22:52:03,818 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:52:03,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:52:03,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:52:03,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:52:03,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:52:03,819 INFO L87 Difference]: Start difference. First operand 1692 states and 2394 transitions. Second operand has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 3 states have call successors, (26), 3 states have call predecessors, (26), 4 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-12 22:52:06,066 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.24s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:52:11,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:52:11,323 INFO L93 Difference]: Finished difference Result 3364 states and 4774 transitions. [2021-11-12 22:52:11,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:52:11,324 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 3 states have call successors, (26), 3 states have call predecessors, (26), 4 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) Word has length 122 [2021-11-12 22:52:11,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:52:11,346 INFO L225 Difference]: With dead ends: 3364 [2021-11-12 22:52:11,346 INFO L226 Difference]: Without dead ends: 1692 [2021-11-12 22:52:11,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 474 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:52:11,364 INFO L933 BasicCegarLoop]: 2392 mSDtfsCounter, 2341 mSDsluCounter, 1430 mSDsCounter, 0 mSdLazyCounter, 963 mSolverCounterSat, 15 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6575.30ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2341 SdHoareTripleChecker+Valid, 3822 SdHoareTripleChecker+Invalid, 979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 26.27ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 963 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7233.78ms IncrementalHoareTripleChecker+Time [2021-11-12 22:52:11,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2341 Valid, 3822 Invalid, 979 Unknown, 0 Unchecked, 26.27ms Time], IncrementalHoareTripleChecker [15 Valid, 963 Invalid, 1 Unknown, 0 Unchecked, 7233.78ms Time] [2021-11-12 22:52:11,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1692 states. [2021-11-12 22:52:11,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1692 to 1692. [2021-11-12 22:52:11,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1692 states, 1125 states have (on average 1.272888888888889) internal successors, (1432), 1169 states have internal predecessors, (1432), 481 states have call successors, (481), 85 states have call predecessors, (481), 85 states have return successors, (480), 466 states have call predecessors, (480), 480 states have call successors, (480) [2021-11-12 22:52:11,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1692 states to 1692 states and 2393 transitions. [2021-11-12 22:52:11,482 INFO L78 Accepts]: Start accepts. Automaton has 1692 states and 2393 transitions. Word has length 122 [2021-11-12 22:52:11,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:52:11,483 INFO L470 AbstractCegarLoop]: Abstraction has 1692 states and 2393 transitions. [2021-11-12 22:52:11,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 3 states have call successors, (26), 3 states have call predecessors, (26), 4 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-12 22:52:11,483 INFO L276 IsEmpty]: Start isEmpty. Operand 1692 states and 2393 transitions. [2021-11-12 22:52:11,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-12 22:52:11,486 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:52:11,486 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:52:11,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 22:52:11,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2021-11-12 22:52:11,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:52:11,900 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:52:11,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:52:11,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1433349594, now seen corresponding path program 1 times [2021-11-12 22:52:11,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:52:11,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [986817449] [2021-11-12 22:52:11,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:52:11,906 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:52:11,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:52:11,909 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:52:11,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 22:52:15,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:52:15,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 1602 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-12 22:52:15,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:52:16,287 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 76 proven. 3 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-12 22:52:16,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:52:17,152 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-12 22:52:17,153 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:52:17,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [986817449] [2021-11-12 22:52:17,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [986817449] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:52:17,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1599374813] [2021-11-12 22:52:17,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:52:17,154 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:52:17,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:52:17,162 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:52:17,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-12 22:52:18,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:52:18,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 1602 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:52:18,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:52:19,771 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-12 22:52:19,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:52:20,338 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-12 22:52:20,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1599374813] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:52:20,339 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:52:20,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [8, 8] total 12 [2021-11-12 22:52:20,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340745844] [2021-11-12 22:52:20,339 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:52:20,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:52:20,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:52:20,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:52:20,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:52:20,342 INFO L87 Difference]: Start difference. First operand 1692 states and 2393 transitions. Second operand has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 3 states have call successors, (26), 3 states have call predecessors, (26), 4 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-12 22:52:22,605 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.26s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:52:27,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:52:27,454 INFO L93 Difference]: Finished difference Result 3364 states and 4772 transitions. [2021-11-12 22:52:27,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:52:27,455 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 3 states have call successors, (26), 3 states have call predecessors, (26), 4 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) Word has length 123 [2021-11-12 22:52:27,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:52:27,475 INFO L225 Difference]: With dead ends: 3364 [2021-11-12 22:52:27,475 INFO L226 Difference]: Without dead ends: 1692 [2021-11-12 22:52:27,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 478 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:52:27,493 INFO L933 BasicCegarLoop]: 2391 mSDtfsCounter, 3722 mSDsluCounter, 1429 mSDsCounter, 0 mSdLazyCounter, 963 mSolverCounterSat, 952 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6279.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3722 SdHoareTripleChecker+Valid, 3820 SdHoareTripleChecker+Invalid, 1916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 24.06ms SdHoareTripleChecker+Time, 952 IncrementalHoareTripleChecker+Valid, 963 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6905.69ms IncrementalHoareTripleChecker+Time [2021-11-12 22:52:27,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3722 Valid, 3820 Invalid, 1916 Unknown, 0 Unchecked, 24.06ms Time], IncrementalHoareTripleChecker [952 Valid, 963 Invalid, 1 Unknown, 0 Unchecked, 6905.69ms Time] [2021-11-12 22:52:27,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1692 states. [2021-11-12 22:52:27,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1692 to 1692. [2021-11-12 22:52:27,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1692 states, 1125 states have (on average 1.272) internal successors, (1431), 1169 states have internal predecessors, (1431), 481 states have call successors, (481), 85 states have call predecessors, (481), 85 states have return successors, (480), 466 states have call predecessors, (480), 480 states have call successors, (480) [2021-11-12 22:52:27,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1692 states to 1692 states and 2392 transitions. [2021-11-12 22:52:27,637 INFO L78 Accepts]: Start accepts. Automaton has 1692 states and 2392 transitions. Word has length 123 [2021-11-12 22:52:27,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:52:27,639 INFO L470 AbstractCegarLoop]: Abstraction has 1692 states and 2392 transitions. [2021-11-12 22:52:27,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 3 states have call successors, (26), 3 states have call predecessors, (26), 4 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-12 22:52:27,640 INFO L276 IsEmpty]: Start isEmpty. Operand 1692 states and 2392 transitions. [2021-11-12 22:52:27,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-12 22:52:27,645 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:52:27,645 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:52:27,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-11-12 22:52:27,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 22:52:28,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:52:28,061 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:52:28,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:52:28,062 INFO L85 PathProgramCache]: Analyzing trace with hash -586728795, now seen corresponding path program 1 times [2021-11-12 22:52:28,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:52:28,068 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [832449280] [2021-11-12 22:52:28,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:52:28,068 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:52:28,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:52:28,069 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:52:28,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 22:52:31,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:52:31,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 1603 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-12 22:52:31,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:52:32,476 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 76 proven. 3 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-12 22:52:32,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:52:33,284 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-12 22:52:33,285 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:52:33,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [832449280] [2021-11-12 22:52:33,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [832449280] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:52:33,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [715834817] [2021-11-12 22:52:33,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:52:33,285 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:52:33,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:52:33,286 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:52:33,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-12 22:52:34,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:52:34,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 1603 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:52:35,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:52:35,871 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-12 22:52:35,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:52:36,410 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-12 22:52:36,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [715834817] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:52:36,410 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:52:36,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [8, 8] total 12 [2021-11-12 22:52:36,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341305882] [2021-11-12 22:52:36,411 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:52:36,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:52:36,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:52:36,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:52:36,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:52:36,413 INFO L87 Difference]: Start difference. First operand 1692 states and 2392 transitions. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 3 states have call successors, (26), 3 states have call predecessors, (26), 4 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-12 22:52:38,674 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.26s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:52:43,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:52:43,628 INFO L93 Difference]: Finished difference Result 3364 states and 4770 transitions. [2021-11-12 22:52:43,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:52:43,629 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 3 states have call successors, (26), 3 states have call predecessors, (26), 4 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) Word has length 124 [2021-11-12 22:52:43,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:52:43,649 INFO L225 Difference]: With dead ends: 3364 [2021-11-12 22:52:43,649 INFO L226 Difference]: Without dead ends: 1692 [2021-11-12 22:52:43,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 482 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:52:43,666 INFO L933 BasicCegarLoop]: 2390 mSDtfsCounter, 3719 mSDsluCounter, 1428 mSDsCounter, 0 mSdLazyCounter, 963 mSolverCounterSat, 952 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6332.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3719 SdHoareTripleChecker+Valid, 3818 SdHoareTripleChecker+Invalid, 1916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 24.14ms SdHoareTripleChecker+Time, 952 IncrementalHoareTripleChecker+Valid, 963 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7014.89ms IncrementalHoareTripleChecker+Time [2021-11-12 22:52:43,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3719 Valid, 3818 Invalid, 1916 Unknown, 0 Unchecked, 24.14ms Time], IncrementalHoareTripleChecker [952 Valid, 963 Invalid, 1 Unknown, 0 Unchecked, 7014.89ms Time] [2021-11-12 22:52:43,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1692 states. [2021-11-12 22:52:43,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1692 to 1692. [2021-11-12 22:52:43,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1692 states, 1125 states have (on average 1.271111111111111) internal successors, (1430), 1169 states have internal predecessors, (1430), 481 states have call successors, (481), 85 states have call predecessors, (481), 85 states have return successors, (480), 466 states have call predecessors, (480), 480 states have call successors, (480) [2021-11-12 22:52:43,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1692 states to 1692 states and 2391 transitions. [2021-11-12 22:52:43,790 INFO L78 Accepts]: Start accepts. Automaton has 1692 states and 2391 transitions. Word has length 124 [2021-11-12 22:52:43,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:52:43,791 INFO L470 AbstractCegarLoop]: Abstraction has 1692 states and 2391 transitions. [2021-11-12 22:52:43,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 3 states have call successors, (26), 3 states have call predecessors, (26), 4 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-12 22:52:43,791 INFO L276 IsEmpty]: Start isEmpty. Operand 1692 states and 2391 transitions. [2021-11-12 22:52:43,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-12 22:52:43,793 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:52:43,794 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:52:43,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 22:52:44,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-12 22:52:44,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:52:44,207 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:52:44,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:52:44,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1329867190, now seen corresponding path program 1 times [2021-11-12 22:52:44,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:52:44,210 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2029072439] [2021-11-12 22:52:44,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:52:44,210 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:52:44,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:52:44,211 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:52:44,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 22:52:47,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:52:47,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 1604 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-12 22:52:47,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:52:48,641 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 76 proven. 3 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-12 22:52:48,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:52:49,563 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-12 22:52:49,564 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:52:49,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2029072439] [2021-11-12 22:52:49,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2029072439] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:52:49,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1443815519] [2021-11-12 22:52:49,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:52:49,564 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:52:49,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:52:49,565 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:52:49,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-12 22:52:51,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:52:51,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 1604 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:52:51,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:52:52,262 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-12 22:52:52,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:52:52,831 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-12 22:52:52,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1443815519] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:52:52,831 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:52:52,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [8, 8] total 12 [2021-11-12 22:52:52,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039270926] [2021-11-12 22:52:52,832 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:52:52,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:52:52,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:52:52,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:52:52,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:52:52,835 INFO L87 Difference]: Start difference. First operand 1692 states and 2391 transitions. Second operand has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 3 states have call successors, (26), 3 states have call predecessors, (26), 4 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-12 22:52:55,133 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.30s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:53:00,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:53:00,109 INFO L93 Difference]: Finished difference Result 3440 states and 4845 transitions. [2021-11-12 22:53:00,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:53:00,110 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 3 states have call successors, (26), 3 states have call predecessors, (26), 4 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) Word has length 125 [2021-11-12 22:53:00,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:53:00,125 INFO L225 Difference]: With dead ends: 3440 [2021-11-12 22:53:00,126 INFO L226 Difference]: Without dead ends: 1768 [2021-11-12 22:53:00,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 486 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:53:00,139 INFO L933 BasicCegarLoop]: 2463 mSDtfsCounter, 3020 mSDsluCounter, 1485 mSDsCounter, 0 mSdLazyCounter, 981 mSolverCounterSat, 305 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6399.32ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3020 SdHoareTripleChecker+Valid, 3948 SdHoareTripleChecker+Invalid, 1287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 22.26ms SdHoareTripleChecker+Time, 305 IncrementalHoareTripleChecker+Valid, 981 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7043.87ms IncrementalHoareTripleChecker+Time [2021-11-12 22:53:00,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3020 Valid, 3948 Invalid, 1287 Unknown, 0 Unchecked, 22.26ms Time], IncrementalHoareTripleChecker [305 Valid, 981 Invalid, 1 Unknown, 0 Unchecked, 7043.87ms Time] [2021-11-12 22:53:00,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1768 states. [2021-11-12 22:53:00,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1768 to 1766. [2021-11-12 22:53:00,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1766 states, 1178 states have (on average 1.2640067911714772) internal successors, (1489), 1222 states have internal predecessors, (1489), 488 states have call successors, (488), 99 states have call predecessors, (488), 99 states have return successors, (487), 473 states have call predecessors, (487), 487 states have call successors, (487) [2021-11-12 22:53:00,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1766 states to 1766 states and 2464 transitions. [2021-11-12 22:53:00,278 INFO L78 Accepts]: Start accepts. Automaton has 1766 states and 2464 transitions. Word has length 125 [2021-11-12 22:53:00,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:53:00,279 INFO L470 AbstractCegarLoop]: Abstraction has 1766 states and 2464 transitions. [2021-11-12 22:53:00,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 3 states have call successors, (26), 3 states have call predecessors, (26), 4 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-12 22:53:00,279 INFO L276 IsEmpty]: Start isEmpty. Operand 1766 states and 2464 transitions. [2021-11-12 22:53:00,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-12 22:53:00,282 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:53:00,282 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:53:00,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:00,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:00,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:53:00,696 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:53:00,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:53:00,697 INFO L85 PathProgramCache]: Analyzing trace with hash 729317185, now seen corresponding path program 1 times [2021-11-12 22:53:00,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:53:00,699 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [836080093] [2021-11-12 22:53:00,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:00,699 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:53:00,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:53:00,700 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:53:00,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 22:53:04,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:04,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 1605 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-12 22:53:04,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:05,389 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 76 proven. 3 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-12 22:53:05,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:06,233 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-12 22:53:06,233 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:53:06,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [836080093] [2021-11-12 22:53:06,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [836080093] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:53:06,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [500923333] [2021-11-12 22:53:06,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:06,234 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:53:06,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:53:06,235 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:53:06,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-12 22:53:07,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:07,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 1605 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:53:07,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:08,788 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-12 22:53:08,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:09,371 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-12 22:53:09,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [500923333] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:53:09,372 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:53:09,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [8, 8] total 12 [2021-11-12 22:53:09,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77330200] [2021-11-12 22:53:09,373 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:53:09,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:53:09,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:53:09,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:53:09,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:53:09,374 INFO L87 Difference]: Start difference. First operand 1766 states and 2464 transitions. Second operand has 5 states, 5 states have (on average 22.2) internal successors, (111), 5 states have internal predecessors, (111), 3 states have call successors, (26), 3 states have call predecessors, (26), 4 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-12 22:53:11,626 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.25s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:53:16,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:53:16,899 INFO L93 Difference]: Finished difference Result 3512 states and 4900 transitions. [2021-11-12 22:53:16,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:53:16,900 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 5 states have internal predecessors, (111), 3 states have call successors, (26), 3 states have call predecessors, (26), 4 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) Word has length 126 [2021-11-12 22:53:16,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:53:16,913 INFO L225 Difference]: With dead ends: 3512 [2021-11-12 22:53:16,913 INFO L226 Difference]: Without dead ends: 1766 [2021-11-12 22:53:16,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 490 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:53:16,921 INFO L933 BasicCegarLoop]: 2389 mSDtfsCounter, 3715 mSDsluCounter, 1427 mSDsCounter, 0 mSdLazyCounter, 963 mSolverCounterSat, 952 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6655.32ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3715 SdHoareTripleChecker+Valid, 3816 SdHoareTripleChecker+Invalid, 1916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 24.81ms SdHoareTripleChecker+Time, 952 IncrementalHoareTripleChecker+Valid, 963 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7287.48ms IncrementalHoareTripleChecker+Time [2021-11-12 22:53:16,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3715 Valid, 3816 Invalid, 1916 Unknown, 0 Unchecked, 24.81ms Time], IncrementalHoareTripleChecker [952 Valid, 963 Invalid, 1 Unknown, 0 Unchecked, 7287.48ms Time] [2021-11-12 22:53:16,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1766 states. [2021-11-12 22:53:17,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1766 to 1766. [2021-11-12 22:53:17,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1766 states, 1178 states have (on average 1.263157894736842) internal successors, (1488), 1222 states have internal predecessors, (1488), 488 states have call successors, (488), 99 states have call predecessors, (488), 99 states have return successors, (487), 473 states have call predecessors, (487), 487 states have call successors, (487) [2021-11-12 22:53:17,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1766 states to 1766 states and 2463 transitions. [2021-11-12 22:53:17,063 INFO L78 Accepts]: Start accepts. Automaton has 1766 states and 2463 transitions. Word has length 126 [2021-11-12 22:53:17,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:53:17,064 INFO L470 AbstractCegarLoop]: Abstraction has 1766 states and 2463 transitions. [2021-11-12 22:53:17,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 5 states have internal predecessors, (111), 3 states have call successors, (26), 3 states have call predecessors, (26), 4 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-12 22:53:17,065 INFO L276 IsEmpty]: Start isEmpty. Operand 1766 states and 2463 transitions. [2021-11-12 22:53:17,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-12 22:53:17,068 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:53:17,068 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:53:17,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:17,293 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (14)] Ended with exit code 0 [2021-11-12 22:53:17,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:53:17,479 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:53:17,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:53:17,480 INFO L85 PathProgramCache]: Analyzing trace with hash -593347182, now seen corresponding path program 1 times [2021-11-12 22:53:17,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:53:17,482 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1926514473] [2021-11-12 22:53:17,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:17,482 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:53:17,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:53:17,485 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:53:17,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-12 22:53:21,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:21,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 1606 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-12 22:53:21,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:21,853 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 76 proven. 3 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-12 22:53:21,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:22,689 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-12 22:53:22,689 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:53:22,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1926514473] [2021-11-12 22:53:22,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1926514473] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:53:22,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1721481107] [2021-11-12 22:53:22,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:22,689 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:53:22,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:53:22,690 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:53:22,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-12 22:53:24,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:24,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 1606 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:53:24,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:25,298 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-12 22:53:25,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:25,877 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-12 22:53:25,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1721481107] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:53:25,877 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:53:25,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [8, 8] total 12 [2021-11-12 22:53:25,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451293167] [2021-11-12 22:53:25,878 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:53:25,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:53:25,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:53:25,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:53:25,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:53:25,880 INFO L87 Difference]: Start difference. First operand 1766 states and 2463 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 3 states have call successors, (26), 3 states have call predecessors, (26), 4 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-12 22:53:28,124 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.24s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:53:33,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:53:33,046 INFO L93 Difference]: Finished difference Result 3512 states and 4898 transitions. [2021-11-12 22:53:33,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:53:33,047 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 3 states have call successors, (26), 3 states have call predecessors, (26), 4 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) Word has length 127 [2021-11-12 22:53:33,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:53:33,061 INFO L225 Difference]: With dead ends: 3512 [2021-11-12 22:53:33,062 INFO L226 Difference]: Without dead ends: 1766 [2021-11-12 22:53:33,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 494 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:53:33,073 INFO L933 BasicCegarLoop]: 2388 mSDtfsCounter, 3712 mSDsluCounter, 1426 mSDsCounter, 0 mSdLazyCounter, 963 mSolverCounterSat, 952 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6298.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3712 SdHoareTripleChecker+Valid, 3814 SdHoareTripleChecker+Invalid, 1916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 25.39ms SdHoareTripleChecker+Time, 952 IncrementalHoareTripleChecker+Valid, 963 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6953.07ms IncrementalHoareTripleChecker+Time [2021-11-12 22:53:33,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3712 Valid, 3814 Invalid, 1916 Unknown, 0 Unchecked, 25.39ms Time], IncrementalHoareTripleChecker [952 Valid, 963 Invalid, 1 Unknown, 0 Unchecked, 6953.07ms Time] [2021-11-12 22:53:33,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1766 states. [2021-11-12 22:53:33,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1766 to 1766. [2021-11-12 22:53:33,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1766 states, 1178 states have (on average 1.262308998302207) internal successors, (1487), 1222 states have internal predecessors, (1487), 488 states have call successors, (488), 99 states have call predecessors, (488), 99 states have return successors, (487), 473 states have call predecessors, (487), 487 states have call successors, (487) [2021-11-12 22:53:33,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1766 states to 1766 states and 2462 transitions. [2021-11-12 22:53:33,236 INFO L78 Accepts]: Start accepts. Automaton has 1766 states and 2462 transitions. Word has length 127 [2021-11-12 22:53:33,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:53:33,237 INFO L470 AbstractCegarLoop]: Abstraction has 1766 states and 2462 transitions. [2021-11-12 22:53:33,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 3 states have call successors, (26), 3 states have call predecessors, (26), 4 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-12 22:53:33,238 INFO L276 IsEmpty]: Start isEmpty. Operand 1766 states and 2462 transitions. [2021-11-12 22:53:33,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-12 22:53:33,241 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:53:33,241 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:53:33,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:33,505 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:33,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:53:33,659 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:53:33,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:53:33,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1468247005, now seen corresponding path program 1 times [2021-11-12 22:53:33,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:53:33,662 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [218902459] [2021-11-12 22:53:33,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:33,662 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:53:33,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:53:33,663 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:53:33,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-12 22:53:37,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:37,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 1607 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-12 22:53:37,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:37,993 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 76 proven. 3 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-12 22:53:37,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:38,831 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-12 22:53:38,831 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:53:38,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [218902459] [2021-11-12 22:53:38,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [218902459] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:53:38,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [754647553] [2021-11-12 22:53:38,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:38,832 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:53:38,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:53:38,833 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:53:38,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-12 22:53:40,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:40,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 1607 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:53:40,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:41,388 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-12 22:53:41,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:41,994 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-12 22:53:41,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [754647553] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:53:41,994 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:53:41,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [8, 8] total 12 [2021-11-12 22:53:41,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137149083] [2021-11-12 22:53:41,995 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:53:41,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:53:41,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:53:41,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:53:41,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:53:41,997 INFO L87 Difference]: Start difference. First operand 1766 states and 2462 transitions. Second operand has 5 states, 5 states have (on average 23.0) internal successors, (115), 5 states have internal predecessors, (115), 3 states have call successors, (26), 3 states have call predecessors, (26), 4 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-12 22:53:44,266 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.27s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:53:48,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:53:48,951 INFO L93 Difference]: Finished difference Result 3512 states and 4896 transitions. [2021-11-12 22:53:48,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:53:48,952 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.0) internal successors, (115), 5 states have internal predecessors, (115), 3 states have call successors, (26), 3 states have call predecessors, (26), 4 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) Word has length 128 [2021-11-12 22:53:48,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:53:48,964 INFO L225 Difference]: With dead ends: 3512 [2021-11-12 22:53:48,965 INFO L226 Difference]: Without dead ends: 1766 [2021-11-12 22:53:48,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 498 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:53:48,974 INFO L933 BasicCegarLoop]: 2387 mSDtfsCounter, 3709 mSDsluCounter, 1425 mSDsCounter, 0 mSdLazyCounter, 963 mSolverCounterSat, 952 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6129.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3709 SdHoareTripleChecker+Valid, 3812 SdHoareTripleChecker+Invalid, 1916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.64ms SdHoareTripleChecker+Time, 952 IncrementalHoareTripleChecker+Valid, 963 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6744.25ms IncrementalHoareTripleChecker+Time [2021-11-12 22:53:48,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3709 Valid, 3812 Invalid, 1916 Unknown, 0 Unchecked, 17.64ms Time], IncrementalHoareTripleChecker [952 Valid, 963 Invalid, 1 Unknown, 0 Unchecked, 6744.25ms Time] [2021-11-12 22:53:48,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1766 states. [2021-11-12 22:53:49,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1766 to 1766. [2021-11-12 22:53:49,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1766 states, 1178 states have (on average 1.2614601018675722) internal successors, (1486), 1222 states have internal predecessors, (1486), 488 states have call successors, (488), 99 states have call predecessors, (488), 99 states have return successors, (487), 473 states have call predecessors, (487), 487 states have call successors, (487) [2021-11-12 22:53:49,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1766 states to 1766 states and 2461 transitions. [2021-11-12 22:53:49,133 INFO L78 Accepts]: Start accepts. Automaton has 1766 states and 2461 transitions. Word has length 128 [2021-11-12 22:53:49,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:53:49,134 INFO L470 AbstractCegarLoop]: Abstraction has 1766 states and 2461 transitions. [2021-11-12 22:53:49,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.0) internal successors, (115), 5 states have internal predecessors, (115), 3 states have call successors, (26), 3 states have call predecessors, (26), 4 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-12 22:53:49,134 INFO L276 IsEmpty]: Start isEmpty. Operand 1766 states and 2461 transitions. [2021-11-12 22:53:49,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-12 22:53:49,137 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:53:49,137 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:53:49,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:49,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:49,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:53:49,547 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:53:49,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:53:49,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1067673966, now seen corresponding path program 1 times [2021-11-12 22:53:49,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:53:49,552 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1422128470] [2021-11-12 22:53:49,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:49,552 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:53:49,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:53:49,556 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:53:49,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-12 22:53:53,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:53,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 1608 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-12 22:53:53,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:54,355 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 76 proven. 3 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-12 22:53:54,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:55,177 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-12 22:53:55,177 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:53:55,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1422128470] [2021-11-12 22:53:55,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1422128470] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:53:55,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1070356481] [2021-11-12 22:53:55,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:55,178 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:53:55,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:53:55,179 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:53:55,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-12 22:53:57,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:57,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 1608 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:53:57,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:57,964 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-12 22:53:57,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:58,584 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-12 22:53:58,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1070356481] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:53:58,584 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:53:58,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [8, 8] total 12 [2021-11-12 22:53:58,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439741799] [2021-11-12 22:53:58,585 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:53:58,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:53:58,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:53:58,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:53:58,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:53:58,587 INFO L87 Difference]: Start difference. First operand 1766 states and 2461 transitions. Second operand has 5 states, 5 states have (on average 23.4) internal successors, (117), 5 states have internal predecessors, (117), 3 states have call successors, (26), 3 states have call predecessors, (26), 4 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-12 22:54:00,860 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.27s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:54:05,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:05,587 INFO L93 Difference]: Finished difference Result 3512 states and 4894 transitions. [2021-11-12 22:54:05,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:54:05,588 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.4) internal successors, (117), 5 states have internal predecessors, (117), 3 states have call successors, (26), 3 states have call predecessors, (26), 4 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) Word has length 129 [2021-11-12 22:54:05,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:05,600 INFO L225 Difference]: With dead ends: 3512 [2021-11-12 22:54:05,600 INFO L226 Difference]: Without dead ends: 1766 [2021-11-12 22:54:05,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 512 GetRequests, 502 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:54:05,607 INFO L933 BasicCegarLoop]: 2386 mSDtfsCounter, 3706 mSDsluCounter, 1424 mSDsCounter, 0 mSdLazyCounter, 963 mSolverCounterSat, 952 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6200.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3706 SdHoareTripleChecker+Valid, 3810 SdHoareTripleChecker+Invalid, 1916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.98ms SdHoareTripleChecker+Time, 952 IncrementalHoareTripleChecker+Valid, 963 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6794.88ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:05,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3706 Valid, 3810 Invalid, 1916 Unknown, 0 Unchecked, 16.98ms Time], IncrementalHoareTripleChecker [952 Valid, 963 Invalid, 1 Unknown, 0 Unchecked, 6794.88ms Time] [2021-11-12 22:54:05,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1766 states. [2021-11-12 22:54:05,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1766 to 1766. [2021-11-12 22:54:05,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1766 states, 1178 states have (on average 1.2606112054329373) internal successors, (1485), 1222 states have internal predecessors, (1485), 488 states have call successors, (488), 99 states have call predecessors, (488), 99 states have return successors, (487), 473 states have call predecessors, (487), 487 states have call successors, (487) [2021-11-12 22:54:05,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1766 states to 1766 states and 2460 transitions. [2021-11-12 22:54:05,788 INFO L78 Accepts]: Start accepts. Automaton has 1766 states and 2460 transitions. Word has length 129 [2021-11-12 22:54:05,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:05,789 INFO L470 AbstractCegarLoop]: Abstraction has 1766 states and 2460 transitions. [2021-11-12 22:54:05,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.4) internal successors, (117), 5 states have internal predecessors, (117), 3 states have call successors, (26), 3 states have call predecessors, (26), 4 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-12 22:54:05,790 INFO L276 IsEmpty]: Start isEmpty. Operand 1766 states and 2460 transitions. [2021-11-12 22:54:05,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-12 22:54:05,793 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:05,793 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:54:05,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:06,036 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:06,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:54:06,203 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:06,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:06,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1649328249, now seen corresponding path program 1 times [2021-11-12 22:54:06,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:06,207 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [169078204] [2021-11-12 22:54:06,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:06,207 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:06,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:06,208 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:06,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-12 22:54:09,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:09,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 1609 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-12 22:54:09,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:10,664 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 76 proven. 3 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-12 22:54:10,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:11,607 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-12 22:54:11,608 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:11,608 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [169078204] [2021-11-12 22:54:11,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [169078204] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:54:11,608 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [37162983] [2021-11-12 22:54:11,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:11,608 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:54:11,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:54:11,611 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:54:11,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-12 22:54:13,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:13,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 1609 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:54:13,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:14,427 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-12 22:54:14,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:15,118 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-12 22:54:15,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [37162983] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:54:15,118 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:54:15,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [8, 8] total 12 [2021-11-12 22:54:15,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991473073] [2021-11-12 22:54:15,119 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:15,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:54:15,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:15,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:54:15,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:54:15,120 INFO L87 Difference]: Start difference. First operand 1766 states and 2460 transitions. Second operand has 5 states, 5 states have (on average 23.8) internal successors, (119), 5 states have internal predecessors, (119), 3 states have call successors, (26), 3 states have call predecessors, (26), 4 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-12 22:54:17,372 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.25s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:54:22,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:22,373 INFO L93 Difference]: Finished difference Result 3512 states and 4892 transitions. [2021-11-12 22:54:22,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:54:22,374 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.8) internal successors, (119), 5 states have internal predecessors, (119), 3 states have call successors, (26), 3 states have call predecessors, (26), 4 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) Word has length 130 [2021-11-12 22:54:22,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:22,387 INFO L225 Difference]: With dead ends: 3512 [2021-11-12 22:54:22,387 INFO L226 Difference]: Without dead ends: 1766 [2021-11-12 22:54:22,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 516 GetRequests, 506 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:54:22,393 INFO L933 BasicCegarLoop]: 2385 mSDtfsCounter, 3703 mSDsluCounter, 1423 mSDsCounter, 0 mSdLazyCounter, 963 mSolverCounterSat, 952 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6390.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3703 SdHoareTripleChecker+Valid, 3808 SdHoareTripleChecker+Invalid, 1916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 19.84ms SdHoareTripleChecker+Time, 952 IncrementalHoareTripleChecker+Valid, 963 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7016.43ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:22,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3703 Valid, 3808 Invalid, 1916 Unknown, 0 Unchecked, 19.84ms Time], IncrementalHoareTripleChecker [952 Valid, 963 Invalid, 1 Unknown, 0 Unchecked, 7016.43ms Time] [2021-11-12 22:54:22,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1766 states. [2021-11-12 22:54:22,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1766 to 1766. [2021-11-12 22:54:22,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1766 states, 1178 states have (on average 1.259762308998302) internal successors, (1484), 1222 states have internal predecessors, (1484), 488 states have call successors, (488), 99 states have call predecessors, (488), 99 states have return successors, (487), 473 states have call predecessors, (487), 487 states have call successors, (487) [2021-11-12 22:54:22,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1766 states to 1766 states and 2459 transitions. [2021-11-12 22:54:22,693 INFO L78 Accepts]: Start accepts. Automaton has 1766 states and 2459 transitions. Word has length 130 [2021-11-12 22:54:22,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:22,694 INFO L470 AbstractCegarLoop]: Abstraction has 1766 states and 2459 transitions. [2021-11-12 22:54:22,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.8) internal successors, (119), 5 states have internal predecessors, (119), 3 states have call successors, (26), 3 states have call predecessors, (26), 4 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-12 22:54:22,694 INFO L276 IsEmpty]: Start isEmpty. Operand 1766 states and 2459 transitions. [2021-11-12 22:54:22,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-12 22:54:22,697 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:22,697 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:54:22,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:22,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:23,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:54:23,107 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:23,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:23,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1679708854, now seen corresponding path program 1 times [2021-11-12 22:54:23,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:23,115 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1043919504] [2021-11-12 22:54:23,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:23,116 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:23,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:23,117 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:23,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-12 22:54:26,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:27,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 1610 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-12 22:54:27,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:27,789 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 76 proven. 3 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-12 22:54:27,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:28,652 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-12 22:54:28,652 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:28,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1043919504] [2021-11-12 22:54:28,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1043919504] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:54:28,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [806131258] [2021-11-12 22:54:28,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:28,654 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:54:28,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:54:28,680 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:54:28,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-12 22:54:30,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:30,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 1610 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:54:30,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:31,454 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-12 22:54:31,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:32,071 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-12 22:54:32,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [806131258] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:54:32,071 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:54:32,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [8, 8] total 12 [2021-11-12 22:54:32,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699286130] [2021-11-12 22:54:32,072 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:32,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:54:32,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:32,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:54:32,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:54:32,073 INFO L87 Difference]: Start difference. First operand 1766 states and 2459 transitions. Second operand has 5 states, 5 states have (on average 24.2) internal successors, (121), 5 states have internal predecessors, (121), 3 states have call successors, (26), 3 states have call predecessors, (26), 4 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-12 22:54:34,354 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.28s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:54:39,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:39,239 INFO L93 Difference]: Finished difference Result 3512 states and 4890 transitions. [2021-11-12 22:54:39,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:54:39,239 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.2) internal successors, (121), 5 states have internal predecessors, (121), 3 states have call successors, (26), 3 states have call predecessors, (26), 4 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) Word has length 131 [2021-11-12 22:54:39,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:39,256 INFO L225 Difference]: With dead ends: 3512 [2021-11-12 22:54:39,256 INFO L226 Difference]: Without dead ends: 1766 [2021-11-12 22:54:39,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 520 GetRequests, 510 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:54:39,262 INFO L933 BasicCegarLoop]: 2384 mSDtfsCounter, 3700 mSDsluCounter, 1422 mSDsCounter, 0 mSdLazyCounter, 963 mSolverCounterSat, 952 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6325.06ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3700 SdHoareTripleChecker+Valid, 3806 SdHoareTripleChecker+Invalid, 1916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.62ms SdHoareTripleChecker+Time, 952 IncrementalHoareTripleChecker+Valid, 963 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6940.62ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:39,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3700 Valid, 3806 Invalid, 1916 Unknown, 0 Unchecked, 17.62ms Time], IncrementalHoareTripleChecker [952 Valid, 963 Invalid, 1 Unknown, 0 Unchecked, 6940.62ms Time] [2021-11-12 22:54:39,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1766 states. [2021-11-12 22:54:39,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1766 to 1766. [2021-11-12 22:54:39,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1766 states, 1178 states have (on average 1.2589134125636672) internal successors, (1483), 1222 states have internal predecessors, (1483), 488 states have call successors, (488), 99 states have call predecessors, (488), 99 states have return successors, (487), 473 states have call predecessors, (487), 487 states have call successors, (487) [2021-11-12 22:54:39,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1766 states to 1766 states and 2458 transitions. [2021-11-12 22:54:39,462 INFO L78 Accepts]: Start accepts. Automaton has 1766 states and 2458 transitions. Word has length 131 [2021-11-12 22:54:39,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:39,463 INFO L470 AbstractCegarLoop]: Abstraction has 1766 states and 2458 transitions. [2021-11-12 22:54:39,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.2) internal successors, (121), 5 states have internal predecessors, (121), 3 states have call successors, (26), 3 states have call predecessors, (26), 4 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-12 22:54:39,463 INFO L276 IsEmpty]: Start isEmpty. Operand 1766 states and 2458 transitions. [2021-11-12 22:54:39,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-12 22:54:39,466 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:39,466 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:54:39,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:39,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:39,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:54:39,891 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:39,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:39,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1686127339, now seen corresponding path program 1 times [2021-11-12 22:54:39,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:39,894 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2133032150] [2021-11-12 22:54:39,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:39,894 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:39,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:39,896 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:39,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-12 22:54:43,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:43,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 1611 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-12 22:54:43,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:44,541 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 76 proven. 3 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-12 22:54:44,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:45,389 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-12 22:54:45,390 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:45,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2133032150] [2021-11-12 22:54:45,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2133032150] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:54:45,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1312792289] [2021-11-12 22:54:45,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:45,390 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:54:45,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:54:45,391 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:54:45,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-12 22:54:47,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:47,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 1611 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:54:47,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:48,337 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-12 22:54:48,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:48,968 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-12 22:54:48,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1312792289] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:54:48,969 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:54:48,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [8, 8] total 12 [2021-11-12 22:54:48,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224981460] [2021-11-12 22:54:48,969 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:48,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:54:48,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:48,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:54:48,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:54:48,971 INFO L87 Difference]: Start difference. First operand 1766 states and 2458 transitions. Second operand has 5 states, 5 states have (on average 24.6) internal successors, (123), 5 states have internal predecessors, (123), 3 states have call successors, (26), 3 states have call predecessors, (26), 4 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-12 22:54:51,245 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.27s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:54:56,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:56,190 INFO L93 Difference]: Finished difference Result 3512 states and 4888 transitions. [2021-11-12 22:54:56,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:54:56,191 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.6) internal successors, (123), 5 states have internal predecessors, (123), 3 states have call successors, (26), 3 states have call predecessors, (26), 4 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) Word has length 132 [2021-11-12 22:54:56,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:56,209 INFO L225 Difference]: With dead ends: 3512 [2021-11-12 22:54:56,209 INFO L226 Difference]: Without dead ends: 1766 [2021-11-12 22:54:56,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 524 GetRequests, 514 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:54:56,218 INFO L933 BasicCegarLoop]: 2383 mSDtfsCounter, 3697 mSDsluCounter, 1421 mSDsCounter, 0 mSdLazyCounter, 963 mSolverCounterSat, 952 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6353.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3697 SdHoareTripleChecker+Valid, 3804 SdHoareTripleChecker+Invalid, 1916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 18.88ms SdHoareTripleChecker+Time, 952 IncrementalHoareTripleChecker+Valid, 963 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6971.43ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:56,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3697 Valid, 3804 Invalid, 1916 Unknown, 0 Unchecked, 18.88ms Time], IncrementalHoareTripleChecker [952 Valid, 963 Invalid, 1 Unknown, 0 Unchecked, 6971.43ms Time] [2021-11-12 22:54:56,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1766 states. [2021-11-12 22:54:56,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1766 to 1766. [2021-11-12 22:54:56,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1766 states, 1178 states have (on average 1.2580645161290323) internal successors, (1482), 1222 states have internal predecessors, (1482), 488 states have call successors, (488), 99 states have call predecessors, (488), 99 states have return successors, (487), 473 states have call predecessors, (487), 487 states have call successors, (487) [2021-11-12 22:54:56,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1766 states to 1766 states and 2457 transitions. [2021-11-12 22:54:56,450 INFO L78 Accepts]: Start accepts. Automaton has 1766 states and 2457 transitions. Word has length 132 [2021-11-12 22:54:56,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:56,451 INFO L470 AbstractCegarLoop]: Abstraction has 1766 states and 2457 transitions. [2021-11-12 22:54:56,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.6) internal successors, (123), 5 states have internal predecessors, (123), 3 states have call successors, (26), 3 states have call predecessors, (26), 4 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-12 22:54:56,452 INFO L276 IsEmpty]: Start isEmpty. Operand 1766 states and 2457 transitions. [2021-11-12 22:54:56,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-12 22:54:56,457 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:56,457 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:54:56,512 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:56,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:56,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:54:56,883 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:56,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:56,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1770583770, now seen corresponding path program 1 times [2021-11-12 22:54:56,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:56,886 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1640376034] [2021-11-12 22:54:56,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:56,886 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:56,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:56,888 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:56,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-12 22:55:00,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:00,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 1612 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-12 22:55:00,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:55:01,539 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 76 proven. 3 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-12 22:55:01,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:55:02,424 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-12 22:55:02,425 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:55:02,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1640376034] [2021-11-12 22:55:02,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1640376034] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:55:02,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1684162675] [2021-11-12 22:55:02,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:02,425 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:55:02,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:55:02,426 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:55:02,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-11-12 22:55:04,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:04,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 1612 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:55:04,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:55:05,287 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-12 22:55:05,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:55:05,925 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-12 22:55:05,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1684162675] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:55:05,925 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:55:05,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [8, 8] total 12 [2021-11-12 22:55:05,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838996052] [2021-11-12 22:55:05,926 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:55:05,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:55:05,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:55:05,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:55:05,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:55:05,927 INFO L87 Difference]: Start difference. First operand 1766 states and 2457 transitions. Second operand has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 3 states have call successors, (26), 3 states have call predecessors, (26), 4 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-12 22:55:08,217 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.29s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:55:13,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:55:13,066 INFO L93 Difference]: Finished difference Result 3512 states and 4886 transitions. [2021-11-12 22:55:13,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:55:13,067 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 3 states have call successors, (26), 3 states have call predecessors, (26), 4 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) Word has length 133 [2021-11-12 22:55:13,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:55:13,081 INFO L225 Difference]: With dead ends: 3512 [2021-11-12 22:55:13,081 INFO L226 Difference]: Without dead ends: 1766 [2021-11-12 22:55:13,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 528 GetRequests, 518 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:55:13,086 INFO L933 BasicCegarLoop]: 2382 mSDtfsCounter, 3694 mSDsluCounter, 1420 mSDsCounter, 0 mSdLazyCounter, 963 mSolverCounterSat, 952 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6208.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3694 SdHoareTripleChecker+Valid, 3802 SdHoareTripleChecker+Invalid, 1916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.30ms SdHoareTripleChecker+Time, 952 IncrementalHoareTripleChecker+Valid, 963 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6824.64ms IncrementalHoareTripleChecker+Time [2021-11-12 22:55:13,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3694 Valid, 3802 Invalid, 1916 Unknown, 0 Unchecked, 17.30ms Time], IncrementalHoareTripleChecker [952 Valid, 963 Invalid, 1 Unknown, 0 Unchecked, 6824.64ms Time] [2021-11-12 22:55:13,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1766 states. [2021-11-12 22:55:13,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1766 to 1766. [2021-11-12 22:55:13,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1766 states, 1178 states have (on average 1.2572156196943973) internal successors, (1481), 1222 states have internal predecessors, (1481), 488 states have call successors, (488), 99 states have call predecessors, (488), 99 states have return successors, (487), 473 states have call predecessors, (487), 487 states have call successors, (487) [2021-11-12 22:55:13,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1766 states to 1766 states and 2456 transitions. [2021-11-12 22:55:13,225 INFO L78 Accepts]: Start accepts. Automaton has 1766 states and 2456 transitions. Word has length 133 [2021-11-12 22:55:13,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:55:13,226 INFO L470 AbstractCegarLoop]: Abstraction has 1766 states and 2456 transitions. [2021-11-12 22:55:13,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 3 states have call successors, (26), 3 states have call predecessors, (26), 4 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-12 22:55:13,227 INFO L276 IsEmpty]: Start isEmpty. Operand 1766 states and 2456 transitions. [2021-11-12 22:55:13,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-12 22:55:13,230 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:55:13,230 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:55:13,256 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (28)] Ended with exit code 0 [2021-11-12 22:55:13,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-12 22:55:13,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:55:13,648 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:55:13,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:55:13,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1741954619, now seen corresponding path program 1 times [2021-11-12 22:55:13,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:55:13,651 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [380310370] [2021-11-12 22:55:13,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:13,651 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:55:13,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:55:13,652 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:55:13,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-12 22:55:17,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:17,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 1612 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-12 22:55:17,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:55:18,210 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 76 proven. 3 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-12 22:55:18,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:55:19,042 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-12 22:55:19,043 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:55:19,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [380310370] [2021-11-12 22:55:19,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [380310370] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:55:19,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2095929546] [2021-11-12 22:55:19,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:19,044 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:55:19,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:55:19,054 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:55:19,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-11-12 22:55:22,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:23,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 1612 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-12 22:55:23,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:55:23,905 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-12 22:55:23,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:55:24,491 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-11-12 22:55:24,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2095929546] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:55:24,492 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-12 22:55:24,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 8, 6] total 13 [2021-11-12 22:55:24,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738926162] [2021-11-12 22:55:24,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:55:24,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:55:24,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:55:24,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:55:24,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:55:24,494 INFO L87 Difference]: Start difference. First operand 1766 states and 2456 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 5 states have internal predecessors, (75), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-12 22:55:24,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:55:24,946 INFO L93 Difference]: Finished difference Result 3565 states and 4954 transitions. [2021-11-12 22:55:24,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:55:24,947 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 5 states have internal predecessors, (75), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 133 [2021-11-12 22:55:24,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:55:24,978 INFO L225 Difference]: With dead ends: 3565 [2021-11-12 22:55:24,979 INFO L226 Difference]: Without dead ends: 1815 [2021-11-12 22:55:24,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 529 GetRequests, 517 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-11-12 22:55:24,988 INFO L933 BasicCegarLoop]: 2445 mSDtfsCounter, 492 mSDsluCounter, 9148 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 79.78ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 626 SdHoareTripleChecker+Valid, 11593 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 43.64ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 87.05ms IncrementalHoareTripleChecker+Time [2021-11-12 22:55:24,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [626 Valid, 11593 Invalid, 12 Unknown, 0 Unchecked, 43.64ms Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 87.05ms Time] [2021-11-12 22:55:24,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1815 states. [2021-11-12 22:55:25,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1815 to 1766. [2021-11-12 22:55:25,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1766 states, 1178 states have (on average 1.2563667232597624) internal successors, (1480), 1221 states have internal predecessors, (1480), 488 states have call successors, (488), 99 states have call predecessors, (488), 99 states have return successors, (487), 473 states have call predecessors, (487), 487 states have call successors, (487) [2021-11-12 22:55:25,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1766 states to 1766 states and 2455 transitions. [2021-11-12 22:55:25,399 INFO L78 Accepts]: Start accepts. Automaton has 1766 states and 2455 transitions. Word has length 133 [2021-11-12 22:55:25,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:55:25,399 INFO L470 AbstractCegarLoop]: Abstraction has 1766 states and 2455 transitions. [2021-11-12 22:55:25,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 5 states have internal predecessors, (75), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-12 22:55:25,400 INFO L276 IsEmpty]: Start isEmpty. Operand 1766 states and 2455 transitions. [2021-11-12 22:55:25,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-12 22:55:25,402 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:55:25,403 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:55:25,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2021-11-12 22:55:25,657 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2021-11-12 22:55:25,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:55:25,825 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:55:25,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:55:25,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1547299170, now seen corresponding path program 1 times [2021-11-12 22:55:25,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:55:25,829 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1815469965] [2021-11-12 22:55:25,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:25,829 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:55:25,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:55:25,830 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:55:25,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-12 22:55:29,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:29,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 1623 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:55:29,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:55:30,117 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-12 22:55:30,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:55:30,415 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-12 22:55:30,415 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:55:30,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1815469965] [2021-11-12 22:55:30,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1815469965] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:55:30,416 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:55:30,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 6 [2021-11-12 22:55:30,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805478171] [2021-11-12 22:55:30,416 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:55:30,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:55:30,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:55:30,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:55:30,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:55:30,417 INFO L87 Difference]: Start difference. First operand 1766 states and 2455 transitions. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 5 states have internal predecessors, (68), 1 states have call successors, (14), 1 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-12 22:55:30,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:55:30,705 INFO L93 Difference]: Finished difference Result 1772 states and 2461 transitions. [2021-11-12 22:55:30,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:55:30,706 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 5 states have internal predecessors, (68), 1 states have call successors, (14), 1 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 137 [2021-11-12 22:55:30,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:55:30,717 INFO L225 Difference]: With dead ends: 1772 [2021-11-12 22:55:30,717 INFO L226 Difference]: Without dead ends: 1770 [2021-11-12 22:55:30,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:55:30,720 INFO L933 BasicCegarLoop]: 2384 mSDtfsCounter, 5 mSDsluCounter, 9530 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 38.18ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 11914 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 20.14ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 40.68ms IncrementalHoareTripleChecker+Time [2021-11-12 22:55:30,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 11914 Invalid, 13 Unknown, 0 Unchecked, 20.14ms Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 40.68ms Time] [2021-11-12 22:55:30,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1770 states. [2021-11-12 22:55:30,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1770 to 1766. [2021-11-12 22:55:30,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1766 states, 1178 states have (on average 1.2555178268251272) internal successors, (1479), 1221 states have internal predecessors, (1479), 488 states have call successors, (488), 99 states have call predecessors, (488), 99 states have return successors, (487), 473 states have call predecessors, (487), 487 states have call successors, (487) [2021-11-12 22:55:30,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1766 states to 1766 states and 2454 transitions. [2021-11-12 22:55:30,949 INFO L78 Accepts]: Start accepts. Automaton has 1766 states and 2454 transitions. Word has length 137 [2021-11-12 22:55:30,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:55:30,950 INFO L470 AbstractCegarLoop]: Abstraction has 1766 states and 2454 transitions. [2021-11-12 22:55:30,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 5 states have internal predecessors, (68), 1 states have call successors, (14), 1 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-12 22:55:30,950 INFO L276 IsEmpty]: Start isEmpty. Operand 1766 states and 2454 transitions. [2021-11-12 22:55:30,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-11-12 22:55:30,955 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:55:30,955 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:55:31,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-12 22:55:31,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:55:31,170 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:55:31,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:55:31,171 INFO L85 PathProgramCache]: Analyzing trace with hash 380359188, now seen corresponding path program 1 times [2021-11-12 22:55:31,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:55:31,175 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [141345567] [2021-11-12 22:55:31,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:31,175 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:55:31,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:55:31,177 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:55:31,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-12 22:55:35,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:35,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 1764 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:55:35,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:55:35,977 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-11-12 22:55:35,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:55:36,478 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-11-12 22:55:36,478 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:55:36,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [141345567] [2021-11-12 22:55:36,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [141345567] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:55:36,479 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:55:36,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 22:55:36,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67591490] [2021-11-12 22:55:36,479 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:55:36,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:55:36,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:55:36,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:55:36,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:55:36,481 INFO L87 Difference]: Start difference. First operand 1766 states and 2454 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 2 states have call successors, (55), 2 states have call predecessors, (55), 2 states have return successors, (52), 2 states have call predecessors, (52), 2 states have call successors, (52) [2021-11-12 22:55:36,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:55:36,703 INFO L93 Difference]: Finished difference Result 2501 states and 3472 transitions. [2021-11-12 22:55:36,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:55:36,704 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 2 states have call successors, (55), 2 states have call predecessors, (55), 2 states have return successors, (52), 2 states have call predecessors, (52), 2 states have call successors, (52) Word has length 194 [2021-11-12 22:55:36,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:55:36,714 INFO L225 Difference]: With dead ends: 2501 [2021-11-12 22:55:36,715 INFO L226 Difference]: Without dead ends: 1766 [2021-11-12 22:55:36,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 385 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:55:36,720 INFO L933 BasicCegarLoop]: 2380 mSDtfsCounter, 463 mSDsluCounter, 1791 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 587 SdHoareTripleChecker+Valid, 4171 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.72ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.66ms IncrementalHoareTripleChecker+Time [2021-11-12 22:55:36,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [587 Valid, 4171 Invalid, 3 Unknown, 0 Unchecked, 8.72ms Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 12.66ms Time] [2021-11-12 22:55:36,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1766 states. [2021-11-12 22:55:37,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1766 to 1766. [2021-11-12 22:55:37,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1766 states, 1178 states have (on average 1.2546689303904923) internal successors, (1478), 1221 states have internal predecessors, (1478), 488 states have call successors, (488), 99 states have call predecessors, (488), 99 states have return successors, (487), 473 states have call predecessors, (487), 487 states have call successors, (487) [2021-11-12 22:55:37,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1766 states to 1766 states and 2453 transitions. [2021-11-12 22:55:37,035 INFO L78 Accepts]: Start accepts. Automaton has 1766 states and 2453 transitions. Word has length 194 [2021-11-12 22:55:37,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:55:37,035 INFO L470 AbstractCegarLoop]: Abstraction has 1766 states and 2453 transitions. [2021-11-12 22:55:37,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 2 states have call successors, (55), 2 states have call predecessors, (55), 2 states have return successors, (52), 2 states have call predecessors, (52), 2 states have call successors, (52) [2021-11-12 22:55:37,036 INFO L276 IsEmpty]: Start isEmpty. Operand 1766 states and 2453 transitions. [2021-11-12 22:55:37,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2021-11-12 22:55:37,041 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:55:37,041 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:55:37,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-12 22:55:37,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:55:37,255 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:55:37,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:55:37,255 INFO L85 PathProgramCache]: Analyzing trace with hash -947799741, now seen corresponding path program 1 times [2021-11-12 22:55:37,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:55:37,258 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [304891154] [2021-11-12 22:55:37,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:37,258 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:55:37,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:55:37,259 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:55:37,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-12 22:55:41,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:41,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 1953 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 22:55:41,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:55:42,583 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-11-12 22:55:42,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:55:44,222 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2021-11-12 22:55:44,222 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:55:44,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [304891154] [2021-11-12 22:55:44,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [304891154] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:55:44,223 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:55:44,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 23 [2021-11-12 22:55:44,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413057547] [2021-11-12 22:55:44,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:55:44,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 22:55:44,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:55:44,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 22:55:44,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-11-12 22:55:44,225 INFO L87 Difference]: Start difference. First operand 1766 states and 2453 transitions. Second operand has 13 states, 12 states have (on average 10.5) internal successors, (126), 12 states have internal predecessors, (126), 5 states have call successors, (38), 2 states have call predecessors, (38), 4 states have return successors, (33), 5 states have call predecessors, (33), 5 states have call successors, (33) [2021-11-12 22:55:48,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:55:48,153 INFO L93 Difference]: Finished difference Result 4011 states and 5614 transitions. [2021-11-12 22:55:48,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-12 22:55:48,154 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 10.5) internal successors, (126), 12 states have internal predecessors, (126), 5 states have call successors, (38), 2 states have call predecessors, (38), 4 states have return successors, (33), 5 states have call predecessors, (33), 5 states have call successors, (33) Word has length 252 [2021-11-12 22:55:48,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:55:48,172 INFO L225 Difference]: With dead ends: 4011 [2021-11-12 22:55:48,173 INFO L226 Difference]: Without dead ends: 2264 [2021-11-12 22:55:48,181 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 514 GetRequests, 483 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=165, Invalid=891, Unknown=0, NotChecked=0, Total=1056 [2021-11-12 22:55:48,182 INFO L933 BasicCegarLoop]: 3036 mSDtfsCounter, 1893 mSDsluCounter, 30537 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 543 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2331.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1989 SdHoareTripleChecker+Valid, 33573 SdHoareTripleChecker+Invalid, 1094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 75.52ms SdHoareTripleChecker+Time, 543 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2579.27ms IncrementalHoareTripleChecker+Time [2021-11-12 22:55:48,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1989 Valid, 33573 Invalid, 1094 Unknown, 0 Unchecked, 75.52ms Time], IncrementalHoareTripleChecker [543 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 2579.27ms Time] [2021-11-12 22:55:48,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2264 states. [2021-11-12 22:55:48,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2264 to 1784. [2021-11-12 22:55:48,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1784 states, 1190 states have (on average 1.2529411764705882) internal successors, (1491), 1233 states have internal predecessors, (1491), 494 states have call successors, (494), 99 states have call predecessors, (494), 99 states have return successors, (493), 479 states have call predecessors, (493), 493 states have call successors, (493) [2021-11-12 22:55:48,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1784 states to 1784 states and 2478 transitions. [2021-11-12 22:55:48,439 INFO L78 Accepts]: Start accepts. Automaton has 1784 states and 2478 transitions. Word has length 252 [2021-11-12 22:55:48,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:55:48,439 INFO L470 AbstractCegarLoop]: Abstraction has 1784 states and 2478 transitions. [2021-11-12 22:55:48,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 10.5) internal successors, (126), 12 states have internal predecessors, (126), 5 states have call successors, (38), 2 states have call predecessors, (38), 4 states have return successors, (33), 5 states have call predecessors, (33), 5 states have call successors, (33) [2021-11-12 22:55:48,440 INFO L276 IsEmpty]: Start isEmpty. Operand 1784 states and 2478 transitions. [2021-11-12 22:55:48,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-11-12 22:55:48,445 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:55:48,445 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:55:48,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-11-12 22:55:48,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:55:48,667 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:55:48,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:55:48,667 INFO L85 PathProgramCache]: Analyzing trace with hash 2025668165, now seen corresponding path program 1 times [2021-11-12 22:55:48,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:55:48,670 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [638569022] [2021-11-12 22:55:48,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:48,671 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:55:48,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:55:48,671 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:55:48,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-12 22:55:52,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:52,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 1826 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-12 22:55:52,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:55:54,189 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 69 proven. 3 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-12 22:55:54,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:55:55,397 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-11-12 22:55:55,398 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:55:55,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [638569022] [2021-11-12 22:55:55,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [638569022] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:55:55,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1703329237] [2021-11-12 22:55:55,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:55,398 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:55:55,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:55:55,399 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:55:55,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2021-11-12 22:55:57,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:57,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 1826 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:55:57,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:55:57,782 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-11-12 22:55:57,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:55:58,461 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-11-12 22:55:58,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1703329237] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:55:58,461 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:55:58,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [17, 17] total 22 [2021-11-12 22:55:58,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381153511] [2021-11-12 22:55:58,462 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:55:58,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:55:58,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:55:58,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:55:58,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=416, Unknown=0, NotChecked=0, Total=462 [2021-11-12 22:55:58,464 INFO L87 Difference]: Start difference. First operand 1784 states and 2478 transitions. Second operand has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 4 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (32), 4 states have call predecessors, (32), 4 states have call successors, (32) [2021-11-12 22:55:58,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:55:58,774 INFO L93 Difference]: Finished difference Result 3558 states and 4964 transitions. [2021-11-12 22:55:58,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:55:58,774 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 4 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (32), 4 states have call predecessors, (32), 4 states have call successors, (32) Word has length 210 [2021-11-12 22:55:58,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:55:58,787 INFO L225 Difference]: With dead ends: 3558 [2021-11-12 22:55:58,788 INFO L226 Difference]: Without dead ends: 1794 [2021-11-12 22:55:58,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 836 GetRequests, 816 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=46, Invalid=416, Unknown=0, NotChecked=0, Total=462 [2021-11-12 22:55:58,797 INFO L933 BasicCegarLoop]: 2380 mSDtfsCounter, 5 mSDsluCounter, 4744 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 49.16ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 7124 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.89ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 53.78ms IncrementalHoareTripleChecker+Time [2021-11-12 22:55:58,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 7124 Invalid, 17 Unknown, 0 Unchecked, 9.89ms Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 53.78ms Time] [2021-11-12 22:55:58,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1794 states. [2021-11-12 22:55:59,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1794 to 1789. [2021-11-12 22:55:59,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1789 states, 1194 states have (on average 1.252931323283082) internal successors, (1496), 1236 states have internal predecessors, (1496), 495 states have call successors, (495), 99 states have call predecessors, (495), 99 states have return successors, (494), 481 states have call predecessors, (494), 494 states have call successors, (494) [2021-11-12 22:55:59,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1789 states to 1789 states and 2485 transitions. [2021-11-12 22:55:59,042 INFO L78 Accepts]: Start accepts. Automaton has 1789 states and 2485 transitions. Word has length 210 [2021-11-12 22:55:59,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:55:59,043 INFO L470 AbstractCegarLoop]: Abstraction has 1789 states and 2485 transitions. [2021-11-12 22:55:59,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 4 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (32), 4 states have call predecessors, (32), 4 states have call successors, (32) [2021-11-12 22:55:59,043 INFO L276 IsEmpty]: Start isEmpty. Operand 1789 states and 2485 transitions. [2021-11-12 22:55:59,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-11-12 22:55:59,048 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:55:59,048 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:55:59,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2021-11-12 22:55:59,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-11-12 22:55:59,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:55:59,464 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:55:59,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:55:59,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1516195075, now seen corresponding path program 1 times [2021-11-12 22:55:59,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:55:59,467 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1891059492] [2021-11-12 22:55:59,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:59,468 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:55:59,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:55:59,468 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:55:59,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-12 22:56:03,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:56:03,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 1826 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-12 22:56:03,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:56:04,775 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 69 proven. 3 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-12 22:56:04,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:56:06,010 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-11-12 22:56:06,011 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:56:06,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1891059492] [2021-11-12 22:56:06,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1891059492] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:56:06,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [854061350] [2021-11-12 22:56:06,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:56:06,011 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:56:06,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:56:06,012 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:56:06,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2021-11-12 22:56:07,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:56:07,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 1826 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 22:56:07,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:56:08,633 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-11-12 22:56:08,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:56:08,989 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-11-12 22:56:08,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [854061350] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:56:08,989 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:56:08,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [17, 17] total 24 [2021-11-12 22:56:08,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217873596] [2021-11-12 22:56:08,990 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:56:08,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:56:08,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:56:08,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:56:08,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=503, Unknown=0, NotChecked=0, Total=552 [2021-11-12 22:56:08,991 INFO L87 Difference]: Start difference. First operand 1789 states and 2485 transitions. Second operand has 6 states, 5 states have (on average 22.8) internal successors, (114), 4 states have internal predecessors, (114), 3 states have call successors, (32), 4 states have call predecessors, (32), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-12 22:56:09,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:56:09,421 INFO L93 Difference]: Finished difference Result 3562 states and 4959 transitions. [2021-11-12 22:56:09,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:56:09,422 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 22.8) internal successors, (114), 4 states have internal predecessors, (114), 3 states have call successors, (32), 4 states have call predecessors, (32), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 210 [2021-11-12 22:56:09,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:56:09,432 INFO L225 Difference]: With dead ends: 3562 [2021-11-12 22:56:09,432 INFO L226 Difference]: Without dead ends: 1737 [2021-11-12 22:56:09,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 838 GetRequests, 814 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=57, Invalid=593, Unknown=0, NotChecked=0, Total=650 [2021-11-12 22:56:09,441 INFO L933 BasicCegarLoop]: 2378 mSDtfsCounter, 10 mSDsluCounter, 9495 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 77.82ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 11873 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.80ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 83.29ms IncrementalHoareTripleChecker+Time [2021-11-12 22:56:09,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 11873 Invalid, 33 Unknown, 0 Unchecked, 11.80ms Time], IncrementalHoareTripleChecker [5 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 83.29ms Time] [2021-11-12 22:56:09,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1737 states. [2021-11-12 22:56:09,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1737 to 1737. [2021-11-12 22:56:09,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1737 states, 1159 states have (on average 1.2562553925798101) internal successors, (1456), 1199 states have internal predecessors, (1456), 477 states have call successors, (477), 100 states have call predecessors, (477), 100 states have return successors, (477), 464 states have call predecessors, (477), 477 states have call successors, (477) [2021-11-12 22:56:09,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1737 states to 1737 states and 2410 transitions. [2021-11-12 22:56:09,669 INFO L78 Accepts]: Start accepts. Automaton has 1737 states and 2410 transitions. Word has length 210 [2021-11-12 22:56:09,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:56:09,669 INFO L470 AbstractCegarLoop]: Abstraction has 1737 states and 2410 transitions. [2021-11-12 22:56:09,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 22.8) internal successors, (114), 4 states have internal predecessors, (114), 3 states have call successors, (32), 4 states have call predecessors, (32), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-12 22:56:09,670 INFO L276 IsEmpty]: Start isEmpty. Operand 1737 states and 2410 transitions. [2021-11-12 22:56:09,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2021-11-12 22:56:09,682 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:56:09,683 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:56:09,746 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-11-12 22:56:09,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (37)] Forceful destruction successful, exit code 0 [2021-11-12 22:56:10,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:56:10,107 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:56:10,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:56:10,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1981458639, now seen corresponding path program 1 times [2021-11-12 22:56:10,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:56:10,110 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [733755384] [2021-11-12 22:56:10,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:56:10,110 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:56:10,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:56:10,111 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:56:10,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-11-12 22:56:14,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:56:14,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 2181 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 22:56:14,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:56:15,656 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 313 proven. 0 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2021-11-12 22:56:15,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:56:17,501 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 24 proven. 26 refuted. 0 times theorem prover too weak. 526 trivial. 0 not checked. [2021-11-12 22:56:17,501 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:56:17,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [733755384] [2021-11-12 22:56:17,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [733755384] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:56:17,501 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:56:17,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 23 [2021-11-12 22:56:17,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937475059] [2021-11-12 22:56:17,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:56:17,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 22:56:17,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:56:17,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 22:56:17,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-11-12 22:56:17,504 INFO L87 Difference]: Start difference. First operand 1737 states and 2410 transitions. Second operand has 13 states, 12 states have (on average 12.416666666666666) internal successors, (149), 12 states have internal predecessors, (149), 5 states have call successors, (43), 2 states have call predecessors, (43), 4 states have return successors, (40), 5 states have call predecessors, (40), 5 states have call successors, (40) [2021-11-12 22:56:20,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:56:20,560 INFO L93 Difference]: Finished difference Result 3895 states and 5447 transitions. [2021-11-12 22:56:20,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-12 22:56:20,561 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 12.416666666666666) internal successors, (149), 12 states have internal predecessors, (149), 5 states have call successors, (43), 2 states have call predecessors, (43), 4 states have return successors, (40), 5 states have call predecessors, (40), 5 states have call successors, (40) Word has length 317 [2021-11-12 22:56:20,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:56:20,575 INFO L225 Difference]: With dead ends: 3895 [2021-11-12 22:56:20,575 INFO L226 Difference]: Without dead ends: 2175 [2021-11-12 22:56:20,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 644 GetRequests, 613 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=165, Invalid=891, Unknown=0, NotChecked=0, Total=1056 [2021-11-12 22:56:20,584 INFO L933 BasicCegarLoop]: 2894 mSDtfsCounter, 1265 mSDsluCounter, 30156 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 338 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1719.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1266 SdHoareTripleChecker+Valid, 33050 SdHoareTripleChecker+Invalid, 851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 39.36ms SdHoareTripleChecker+Time, 338 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1899.73ms IncrementalHoareTripleChecker+Time [2021-11-12 22:56:20,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1266 Valid, 33050 Invalid, 851 Unknown, 0 Unchecked, 39.36ms Time], IncrementalHoareTripleChecker [338 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 1899.73ms Time] [2021-11-12 22:56:20,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2175 states. [2021-11-12 22:56:20,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2175 to 1737. [2021-11-12 22:56:20,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1737 states, 1159 states have (on average 1.2562553925798101) internal successors, (1456), 1199 states have internal predecessors, (1456), 477 states have call successors, (477), 100 states have call predecessors, (477), 100 states have return successors, (477), 464 states have call predecessors, (477), 477 states have call successors, (477) [2021-11-12 22:56:20,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1737 states to 1737 states and 2410 transitions. [2021-11-12 22:56:20,869 INFO L78 Accepts]: Start accepts. Automaton has 1737 states and 2410 transitions. Word has length 317 [2021-11-12 22:56:20,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:56:20,870 INFO L470 AbstractCegarLoop]: Abstraction has 1737 states and 2410 transitions. [2021-11-12 22:56:20,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 12.416666666666666) internal successors, (149), 12 states have internal predecessors, (149), 5 states have call successors, (43), 2 states have call predecessors, (43), 4 states have return successors, (40), 5 states have call predecessors, (40), 5 states have call successors, (40) [2021-11-12 22:56:20,870 INFO L276 IsEmpty]: Start isEmpty. Operand 1737 states and 2410 transitions. [2021-11-12 22:56:20,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 401 [2021-11-12 22:56:20,882 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:56:20,882 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:56:20,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2021-11-12 22:56:21,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:56:21,087 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:56:21,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:56:21,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1665944607, now seen corresponding path program 1 times [2021-11-12 22:56:21,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:56:21,091 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [920785505] [2021-11-12 22:56:21,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:56:21,091 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:56:21,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:56:21,092 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:56:21,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-11-12 22:56:26,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:56:26,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 2527 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:56:26,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:56:27,654 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 271 proven. 0 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2021-11-12 22:56:27,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:56:28,793 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2021-11-12 22:56:28,793 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:56:28,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [920785505] [2021-11-12 22:56:28,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [920785505] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:56:28,794 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:56:28,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-12 22:56:28,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304527261] [2021-11-12 22:56:28,795 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:56:28,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:56:28,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:56:28,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:56:28,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:56:28,797 INFO L87 Difference]: Start difference. First operand 1737 states and 2410 transitions. Second operand has 8 states, 8 states have (on average 31.375) internal successors, (251), 8 states have internal predecessors, (251), 2 states have call successors, (87), 2 states have call predecessors, (87), 2 states have return successors, (85), 2 states have call predecessors, (85), 2 states have call successors, (85) [2021-11-12 22:56:31,470 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:56:31,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:56:31,925 INFO L93 Difference]: Finished difference Result 3539 states and 4912 transitions. [2021-11-12 22:56:31,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:56:31,927 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 31.375) internal successors, (251), 8 states have internal predecessors, (251), 2 states have call successors, (87), 2 states have call predecessors, (87), 2 states have return successors, (85), 2 states have call predecessors, (85), 2 states have call successors, (85) Word has length 400 [2021-11-12 22:56:31,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:56:31,939 INFO L225 Difference]: With dead ends: 3539 [2021-11-12 22:56:31,940 INFO L226 Difference]: Without dead ends: 1820 [2021-11-12 22:56:31,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 802 GetRequests, 794 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:56:31,949 INFO L933 BasicCegarLoop]: 2384 mSDtfsCounter, 148 mSDsluCounter, 14047 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 33 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2561.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 16431 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 24.74ms SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2646.72ms IncrementalHoareTripleChecker+Time [2021-11-12 22:56:31,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 16431 Invalid, 78 Unknown, 0 Unchecked, 24.74ms Time], IncrementalHoareTripleChecker [33 Valid, 44 Invalid, 1 Unknown, 0 Unchecked, 2646.72ms Time] [2021-11-12 22:56:31,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1820 states. [2021-11-12 22:56:32,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1820 to 1740. [2021-11-12 22:56:32,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1740 states, 1162 states have (on average 1.2555938037865748) internal successors, (1459), 1202 states have internal predecessors, (1459), 477 states have call successors, (477), 100 states have call predecessors, (477), 100 states have return successors, (477), 464 states have call predecessors, (477), 477 states have call successors, (477) [2021-11-12 22:56:32,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1740 states to 1740 states and 2413 transitions. [2021-11-12 22:56:32,328 INFO L78 Accepts]: Start accepts. Automaton has 1740 states and 2413 transitions. Word has length 400 [2021-11-12 22:56:32,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:56:32,329 INFO L470 AbstractCegarLoop]: Abstraction has 1740 states and 2413 transitions. [2021-11-12 22:56:32,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 31.375) internal successors, (251), 8 states have internal predecessors, (251), 2 states have call successors, (87), 2 states have call predecessors, (87), 2 states have return successors, (85), 2 states have call predecessors, (85), 2 states have call successors, (85) [2021-11-12 22:56:32,329 INFO L276 IsEmpty]: Start isEmpty. Operand 1740 states and 2413 transitions. [2021-11-12 22:56:32,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 422 [2021-11-12 22:56:32,343 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:56:32,343 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:56:32,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2021-11-12 22:56:32,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:56:32,567 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:56:32,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:56:32,568 INFO L85 PathProgramCache]: Analyzing trace with hash -52670320, now seen corresponding path program 1 times [2021-11-12 22:56:32,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:56:32,571 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1445497083] [2021-11-12 22:56:32,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:56:32,572 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:56:32,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:56:32,573 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:56:32,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-11-12 22:56:37,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:56:37,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 2574 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:56:37,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:56:39,273 INFO L134 CoverageAnalysis]: Checked inductivity of 713 backedges. 344 proven. 0 refuted. 0 times theorem prover too weak. 369 trivial. 0 not checked. [2021-11-12 22:56:39,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:56:40,551 INFO L134 CoverageAnalysis]: Checked inductivity of 713 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 713 trivial. 0 not checked. [2021-11-12 22:56:40,551 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:56:40,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1445497083] [2021-11-12 22:56:40,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1445497083] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:56:40,552 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:56:40,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-12 22:56:40,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927889934] [2021-11-12 22:56:40,552 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:56:40,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:56:40,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:56:40,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:56:40,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:56:40,559 INFO L87 Difference]: Start difference. First operand 1740 states and 2413 transitions. Second operand has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 4 states have call successors, (93), 2 states have call predecessors, (93), 2 states have return successors, (91), 4 states have call predecessors, (91), 4 states have call successors, (91) [2021-11-12 22:56:41,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:56:41,955 INFO L93 Difference]: Finished difference Result 4321 states and 6075 transitions. [2021-11-12 22:56:41,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:56:41,956 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 4 states have call successors, (93), 2 states have call predecessors, (93), 2 states have return successors, (91), 4 states have call predecessors, (91), 4 states have call successors, (91) Word has length 421 [2021-11-12 22:56:41,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:56:41,972 INFO L225 Difference]: With dead ends: 4321 [2021-11-12 22:56:41,973 INFO L226 Difference]: Without dead ends: 2599 [2021-11-12 22:56:41,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 840 GetRequests, 838 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:56:41,981 INFO L933 BasicCegarLoop]: 2946 mSDtfsCounter, 792 mSDsluCounter, 4915 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 947.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1006 SdHoareTripleChecker+Valid, 7861 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.63ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1068.65ms IncrementalHoareTripleChecker+Time [2021-11-12 22:56:41,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1006 Valid, 7861 Invalid, 138 Unknown, 0 Unchecked, 11.63ms Time], IncrementalHoareTripleChecker [7 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 1068.65ms Time] [2021-11-12 22:56:41,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2599 states. [2021-11-12 22:56:42,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2599 to 2100. [2021-11-12 22:56:42,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2100 states, 1428 states have (on average 1.2640056022408963) internal successors, (1805), 1476 states have internal predecessors, (1805), 571 states have call successors, (571), 100 states have call predecessors, (571), 100 states have return successors, (571), 555 states have call predecessors, (571), 571 states have call successors, (571) [2021-11-12 22:56:42,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2100 states to 2100 states and 2947 transitions. [2021-11-12 22:56:42,520 INFO L78 Accepts]: Start accepts. Automaton has 2100 states and 2947 transitions. Word has length 421 [2021-11-12 22:56:42,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:56:42,521 INFO L470 AbstractCegarLoop]: Abstraction has 2100 states and 2947 transitions. [2021-11-12 22:56:42,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 4 states have call successors, (93), 2 states have call predecessors, (93), 2 states have return successors, (91), 4 states have call predecessors, (91), 4 states have call successors, (91) [2021-11-12 22:56:42,522 INFO L276 IsEmpty]: Start isEmpty. Operand 2100 states and 2947 transitions. [2021-11-12 22:56:42,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 427 [2021-11-12 22:56:42,537 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:56:42,538 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:56:42,617 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2021-11-12 22:56:42,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:56:42,752 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:56:42,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:56:42,753 INFO L85 PathProgramCache]: Analyzing trace with hash -682427645, now seen corresponding path program 1 times [2021-11-12 22:56:42,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:56:42,758 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1635785909] [2021-11-12 22:56:42,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:56:42,758 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:56:42,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:56:42,760 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:56:42,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-11-12 22:56:47,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:56:48,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 2587 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 22:56:48,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:56:49,716 INFO L134 CoverageAnalysis]: Checked inductivity of 713 backedges. 344 proven. 0 refuted. 0 times theorem prover too weak. 369 trivial. 0 not checked. [2021-11-12 22:56:49,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:56:51,109 INFO L134 CoverageAnalysis]: Checked inductivity of 713 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 713 trivial. 0 not checked. [2021-11-12 22:56:51,109 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:56:51,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1635785909] [2021-11-12 22:56:51,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1635785909] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:56:51,109 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:56:51,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 22:56:51,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502583316] [2021-11-12 22:56:51,110 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:56:51,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:56:51,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:56:51,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:56:51,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:56:51,111 INFO L87 Difference]: Start difference. First operand 2100 states and 2947 transitions. Second operand has 6 states, 6 states have (on average 45.333333333333336) internal successors, (272), 6 states have internal predecessors, (272), 4 states have call successors, (91), 2 states have call predecessors, (91), 2 states have return successors, (89), 4 states have call predecessors, (89), 4 states have call successors, (89) [2021-11-12 22:56:53,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:56:53,252 INFO L93 Difference]: Finished difference Result 5137 states and 7273 transitions. [2021-11-12 22:56:53,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:56:53,253 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 45.333333333333336) internal successors, (272), 6 states have internal predecessors, (272), 4 states have call successors, (91), 2 states have call predecessors, (91), 2 states have return successors, (89), 4 states have call predecessors, (89), 4 states have call successors, (89) Word has length 426 [2021-11-12 22:56:53,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:56:53,270 INFO L225 Difference]: With dead ends: 5137 [2021-11-12 22:56:53,271 INFO L226 Difference]: Without dead ends: 3055 [2021-11-12 22:56:53,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 852 GetRequests, 847 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:56:53,282 INFO L933 BasicCegarLoop]: 3549 mSDtfsCounter, 1219 mSDsluCounter, 11094 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1444.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1435 SdHoareTripleChecker+Valid, 14643 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 22.26ms SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1646.82ms IncrementalHoareTripleChecker+Time [2021-11-12 22:56:53,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1435 Valid, 14643 Invalid, 386 Unknown, 0 Unchecked, 22.26ms Time], IncrementalHoareTripleChecker [227 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 1646.82ms Time] [2021-11-12 22:56:53,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3055 states. [2021-11-12 22:56:53,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3055 to 2102. [2021-11-12 22:56:53,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2102 states, 1430 states have (on average 1.2636363636363637) internal successors, (1807), 1478 states have internal predecessors, (1807), 571 states have call successors, (571), 100 states have call predecessors, (571), 100 states have return successors, (571), 555 states have call predecessors, (571), 571 states have call successors, (571) [2021-11-12 22:56:53,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2102 states to 2102 states and 2949 transitions. [2021-11-12 22:56:53,789 INFO L78 Accepts]: Start accepts. Automaton has 2102 states and 2949 transitions. Word has length 426 [2021-11-12 22:56:53,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:56:53,790 INFO L470 AbstractCegarLoop]: Abstraction has 2102 states and 2949 transitions. [2021-11-12 22:56:53,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 45.333333333333336) internal successors, (272), 6 states have internal predecessors, (272), 4 states have call successors, (91), 2 states have call predecessors, (91), 2 states have return successors, (89), 4 states have call predecessors, (89), 4 states have call successors, (89) [2021-11-12 22:56:53,790 INFO L276 IsEmpty]: Start isEmpty. Operand 2102 states and 2949 transitions. [2021-11-12 22:56:53,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 422 [2021-11-12 22:56:53,805 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:56:53,805 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:56:53,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2021-11-12 22:56:54,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:56:54,019 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:56:54,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:56:54,020 INFO L85 PathProgramCache]: Analyzing trace with hash -502974828, now seen corresponding path program 1 times [2021-11-12 22:56:54,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:56:54,024 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1224623595] [2021-11-12 22:56:54,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:56:54,024 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:56:54,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:56:54,026 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:56:54,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-11-12 22:56:58,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:56:59,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 2565 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-12 22:56:59,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:57:00,510 INFO L134 CoverageAnalysis]: Checked inductivity of 713 backedges. 334 proven. 0 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2021-11-12 22:57:00,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:57:01,905 INFO L134 CoverageAnalysis]: Checked inductivity of 713 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 711 trivial. 0 not checked. [2021-11-12 22:57:01,905 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:57:01,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1224623595] [2021-11-12 22:57:01,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1224623595] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:57:01,905 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:57:01,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-12 22:57:01,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945574709] [2021-11-12 22:57:01,906 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:57:01,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 22:57:01,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:57:01,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 22:57:01,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:57:01,907 INFO L87 Difference]: Start difference. First operand 2102 states and 2949 transitions. Second operand has 12 states, 12 states have (on average 21.0) internal successors, (252), 10 states have internal predecessors, (252), 2 states have call successors, (85), 2 states have call predecessors, (85), 4 states have return successors, (84), 4 states have call predecessors, (84), 2 states have call successors, (84) [2021-11-12 22:57:02,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:57:02,741 INFO L93 Difference]: Finished difference Result 4345 states and 6108 transitions. [2021-11-12 22:57:02,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:57:02,743 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 21.0) internal successors, (252), 10 states have internal predecessors, (252), 2 states have call successors, (85), 2 states have call predecessors, (85), 4 states have return successors, (84), 4 states have call predecessors, (84), 2 states have call successors, (84) Word has length 421 [2021-11-12 22:57:02,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:57:02,758 INFO L225 Difference]: With dead ends: 4345 [2021-11-12 22:57:02,758 INFO L226 Difference]: Without dead ends: 2261 [2021-11-12 22:57:02,767 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 844 GetRequests, 832 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-11-12 22:57:02,768 INFO L933 BasicCegarLoop]: 2424 mSDtfsCounter, 419 mSDsluCounter, 14358 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 309.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 16782 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 21.12ms SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 358.74ms IncrementalHoareTripleChecker+Time [2021-11-12 22:57:02,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [426 Valid, 16782 Invalid, 160 Unknown, 0 Unchecked, 21.12ms Time], IncrementalHoareTripleChecker [115 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 358.74ms Time] [2021-11-12 22:57:02,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2261 states. [2021-11-12 22:57:03,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2261 to 2112. [2021-11-12 22:57:03,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2112 states, 1439 states have (on average 1.2619874913134121) internal successors, (1816), 1486 states have internal predecessors, (1816), 571 states have call successors, (571), 100 states have call predecessors, (571), 101 states have return successors, (578), 557 states have call predecessors, (578), 571 states have call successors, (578) [2021-11-12 22:57:03,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2112 states to 2112 states and 2965 transitions. [2021-11-12 22:57:03,247 INFO L78 Accepts]: Start accepts. Automaton has 2112 states and 2965 transitions. Word has length 421 [2021-11-12 22:57:03,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:57:03,248 INFO L470 AbstractCegarLoop]: Abstraction has 2112 states and 2965 transitions. [2021-11-12 22:57:03,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 21.0) internal successors, (252), 10 states have internal predecessors, (252), 2 states have call successors, (85), 2 states have call predecessors, (85), 4 states have return successors, (84), 4 states have call predecessors, (84), 2 states have call successors, (84) [2021-11-12 22:57:03,249 INFO L276 IsEmpty]: Start isEmpty. Operand 2112 states and 2965 transitions. [2021-11-12 22:57:03,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 446 [2021-11-12 22:57:03,264 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:57:03,265 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:57:03,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2021-11-12 22:57:03,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:57:03,489 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:57:03,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:57:03,490 INFO L85 PathProgramCache]: Analyzing trace with hash -399266317, now seen corresponding path program 1 times [2021-11-12 22:57:03,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:57:03,493 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2130841255] [2021-11-12 22:57:03,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:57:03,493 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:57:03,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:57:03,494 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:57:03,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-11-12 22:57:08,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:57:08,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 2625 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 22:57:08,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:57:11,222 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 413 proven. 0 refuted. 0 times theorem prover too weak. 447 trivial. 0 not checked. [2021-11-12 22:57:11,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:57:12,671 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 860 trivial. 0 not checked. [2021-11-12 22:57:12,671 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:57:12,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2130841255] [2021-11-12 22:57:12,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2130841255] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:57:12,671 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:57:12,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [] total 6 [2021-11-12 22:57:12,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80125699] [2021-11-12 22:57:12,672 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:57:12,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:57:12,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:57:12,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:57:12,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:57:12,674 INFO L87 Difference]: Start difference. First operand 2112 states and 2965 transitions. Second operand has 6 states, 6 states have (on average 51.5) internal successors, (309), 6 states have internal predecessors, (309), 4 states have call successors, (109), 3 states have call predecessors, (109), 3 states have return successors, (107), 4 states have call predecessors, (107), 4 states have call successors, (107) [2021-11-12 22:57:15,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:57:15,875 INFO L93 Difference]: Finished difference Result 7585 states and 10750 transitions. [2021-11-12 22:57:15,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:57:15,876 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 51.5) internal successors, (309), 6 states have internal predecessors, (309), 4 states have call successors, (109), 3 states have call predecessors, (109), 3 states have return successors, (107), 4 states have call predecessors, (107), 4 states have call successors, (107) Word has length 445 [2021-11-12 22:57:15,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:57:15,907 INFO L225 Difference]: With dead ends: 7585 [2021-11-12 22:57:15,908 INFO L226 Difference]: Without dead ends: 5491 [2021-11-12 22:57:15,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 890 GetRequests, 884 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:57:15,919 INFO L933 BasicCegarLoop]: 3407 mSDtfsCounter, 3224 mSDsluCounter, 9152 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1985.10ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3339 SdHoareTripleChecker+Valid, 12559 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 31.31ms SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2243.68ms IncrementalHoareTripleChecker+Time [2021-11-12 22:57:15,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3339 Valid, 12559 Invalid, 506 Unknown, 0 Unchecked, 31.31ms Time], IncrementalHoareTripleChecker [139 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 2243.68ms Time] [2021-11-12 22:57:15,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5491 states. [2021-11-12 22:57:16,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5491 to 4200. [2021-11-12 22:57:16,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4200 states, 2861 states have (on average 1.2624956308982873) internal successors, (3612), 2955 states have internal predecessors, (3612), 1136 states have call successors, (1136), 200 states have call predecessors, (1136), 202 states have return successors, (1150), 1108 states have call predecessors, (1150), 1136 states have call successors, (1150) [2021-11-12 22:57:16,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4200 states to 4200 states and 5898 transitions. [2021-11-12 22:57:16,630 INFO L78 Accepts]: Start accepts. Automaton has 4200 states and 5898 transitions. Word has length 445 [2021-11-12 22:57:16,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:57:16,631 INFO L470 AbstractCegarLoop]: Abstraction has 4200 states and 5898 transitions. [2021-11-12 22:57:16,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 51.5) internal successors, (309), 6 states have internal predecessors, (309), 4 states have call successors, (109), 3 states have call predecessors, (109), 3 states have return successors, (107), 4 states have call predecessors, (107), 4 states have call successors, (107) [2021-11-12 22:57:16,631 INFO L276 IsEmpty]: Start isEmpty. Operand 4200 states and 5898 transitions. [2021-11-12 22:57:16,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2021-11-12 22:57:16,654 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:57:16,655 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 8, 8, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:57:16,730 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2021-11-12 22:57:16,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:57:16,863 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:57:16,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:57:16,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1678035355, now seen corresponding path program 1 times [2021-11-12 22:57:16,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:57:16,868 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [439813736] [2021-11-12 22:57:16,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:57:16,868 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:57:16,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:57:16,870 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:57:16,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-11-12 22:57:21,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:57:22,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 2670 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 22:57:22,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:57:23,535 INFO L134 CoverageAnalysis]: Checked inductivity of 895 backedges. 421 proven. 0 refuted. 0 times theorem prover too weak. 474 trivial. 0 not checked. [2021-11-12 22:57:23,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:57:24,990 INFO L134 CoverageAnalysis]: Checked inductivity of 895 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 893 trivial. 0 not checked. [2021-11-12 22:57:24,990 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:57:24,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [439813736] [2021-11-12 22:57:24,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [439813736] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:57:24,990 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:57:24,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-11-12 22:57:24,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594871866] [2021-11-12 22:57:24,991 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:57:24,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:57:24,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:57:24,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:57:24,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:57:24,993 INFO L87 Difference]: Start difference. First operand 4200 states and 5898 transitions. Second operand has 7 states, 5 states have (on average 55.0) internal successors, (275), 7 states have internal predecessors, (275), 4 states have call successors, (103), 2 states have call predecessors, (103), 3 states have return successors, (101), 2 states have call predecessors, (101), 4 states have call successors, (101) [2021-11-12 22:57:26,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:57:26,039 INFO L93 Difference]: Finished difference Result 8852 states and 12460 transitions. [2021-11-12 22:57:26,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:57:26,050 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 55.0) internal successors, (275), 7 states have internal predecessors, (275), 4 states have call successors, (103), 2 states have call predecessors, (103), 3 states have return successors, (101), 2 states have call predecessors, (101), 4 states have call successors, (101) Word has length 467 [2021-11-12 22:57:26,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:57:26,078 INFO L225 Difference]: With dead ends: 8852 [2021-11-12 22:57:26,078 INFO L226 Difference]: Without dead ends: 4666 [2021-11-12 22:57:26,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 933 GetRequests, 927 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:57:26,096 INFO L933 BasicCegarLoop]: 2941 mSDtfsCounter, 899 mSDsluCounter, 11178 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 304.77ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1015 SdHoareTripleChecker+Valid, 14119 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 20.61ms SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 366.07ms IncrementalHoareTripleChecker+Time [2021-11-12 22:57:26,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1015 Valid, 14119 Invalid, 145 Unknown, 0 Unchecked, 20.61ms Time], IncrementalHoareTripleChecker [115 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 366.07ms Time] [2021-11-12 22:57:26,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4666 states. [2021-11-12 22:57:26,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4666 to 4200. [2021-11-12 22:57:26,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4200 states, 2861 states have (on average 1.2617965746242572) internal successors, (3610), 2955 states have internal predecessors, (3610), 1136 states have call successors, (1136), 200 states have call predecessors, (1136), 202 states have return successors, (1150), 1108 states have call predecessors, (1150), 1136 states have call successors, (1150) [2021-11-12 22:57:27,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4200 states to 4200 states and 5896 transitions. [2021-11-12 22:57:27,020 INFO L78 Accepts]: Start accepts. Automaton has 4200 states and 5896 transitions. Word has length 467 [2021-11-12 22:57:27,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:57:27,021 INFO L470 AbstractCegarLoop]: Abstraction has 4200 states and 5896 transitions. [2021-11-12 22:57:27,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 55.0) internal successors, (275), 7 states have internal predecessors, (275), 4 states have call successors, (103), 2 states have call predecessors, (103), 3 states have return successors, (101), 2 states have call predecessors, (101), 4 states have call successors, (101) [2021-11-12 22:57:27,022 INFO L276 IsEmpty]: Start isEmpty. Operand 4200 states and 5896 transitions. [2021-11-12 22:57:27,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2021-11-12 22:57:27,041 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:57:27,042 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 8, 8, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:57:27,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2021-11-12 22:57:27,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:57:27,263 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:57:27,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:57:27,264 INFO L85 PathProgramCache]: Analyzing trace with hash 307791855, now seen corresponding path program 1 times [2021-11-12 22:57:27,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:57:27,267 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [446303602] [2021-11-12 22:57:27,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:57:27,268 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:57:27,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:57:27,268 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:57:27,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-11-12 22:57:32,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:57:32,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 2695 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 22:57:32,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:57:34,245 INFO L134 CoverageAnalysis]: Checked inductivity of 905 backedges. 455 proven. 2 refuted. 0 times theorem prover too weak. 448 trivial. 0 not checked. [2021-11-12 22:57:34,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:57:36,239 INFO L134 CoverageAnalysis]: Checked inductivity of 905 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 896 trivial. 0 not checked. [2021-11-12 22:57:36,239 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:57:36,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [446303602] [2021-11-12 22:57:36,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [446303602] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:57:36,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1991152082] [2021-11-12 22:57:36,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:57:36,240 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:57:36,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:57:36,241 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:57:36,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (46)] Waiting until timeout for monitored process [2021-11-12 22:57:38,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:57:38,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 2695 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:57:38,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:57:39,893 INFO L134 CoverageAnalysis]: Checked inductivity of 905 backedges. 409 proven. 0 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2021-11-12 22:57:39,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:57:40,969 INFO L134 CoverageAnalysis]: Checked inductivity of 905 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2021-11-12 22:57:40,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1991152082] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:57:40,971 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:57:40,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [9, 9] total 17 [2021-11-12 22:57:40,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526642672] [2021-11-12 22:57:40,972 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:57:40,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:57:40,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:57:40,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:57:40,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-11-12 22:57:40,973 INFO L87 Difference]: Start difference. First operand 4200 states and 5896 transitions. Second operand has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 2 states have call successors, (92), 2 states have call predecessors, (92), 2 states have return successors, (90), 2 states have call predecessors, (90), 2 states have call successors, (90) [2021-11-12 22:57:41,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:57:41,608 INFO L93 Difference]: Finished difference Result 8430 states and 11838 transitions. [2021-11-12 22:57:41,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:57:41,612 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 2 states have call successors, (92), 2 states have call predecessors, (92), 2 states have return successors, (90), 2 states have call predecessors, (90), 2 states have call successors, (90) Word has length 486 [2021-11-12 22:57:41,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:57:41,638 INFO L225 Difference]: With dead ends: 8430 [2021-11-12 22:57:41,639 INFO L226 Difference]: Without dead ends: 4248 [2021-11-12 22:57:41,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1940 GetRequests, 1925 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-11-12 22:57:41,657 INFO L933 BasicCegarLoop]: 2330 mSDtfsCounter, 366 mSDsluCounter, 1850 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 78.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 4180 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.93ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 90.05ms IncrementalHoareTripleChecker+Time [2021-11-12 22:57:41,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [470 Valid, 4180 Invalid, 12 Unknown, 0 Unchecked, 6.93ms Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 90.05ms Time] [2021-11-12 22:57:41,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4248 states. [2021-11-12 22:57:42,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4248 to 4204. [2021-11-12 22:57:42,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4204 states, 2865 states have (on average 1.2614310645724258) internal successors, (3614), 2959 states have internal predecessors, (3614), 1136 states have call successors, (1136), 200 states have call predecessors, (1136), 202 states have return successors, (1150), 1108 states have call predecessors, (1150), 1136 states have call successors, (1150) [2021-11-12 22:57:42,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4204 states to 4204 states and 5900 transitions. [2021-11-12 22:57:42,517 INFO L78 Accepts]: Start accepts. Automaton has 4204 states and 5900 transitions. Word has length 486 [2021-11-12 22:57:42,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:57:42,518 INFO L470 AbstractCegarLoop]: Abstraction has 4204 states and 5900 transitions. [2021-11-12 22:57:42,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 2 states have call successors, (92), 2 states have call predecessors, (92), 2 states have return successors, (90), 2 states have call predecessors, (90), 2 states have call successors, (90) [2021-11-12 22:57:42,518 INFO L276 IsEmpty]: Start isEmpty. Operand 4204 states and 5900 transitions. [2021-11-12 22:57:42,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2021-11-12 22:57:42,536 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:57:42,537 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 8, 8, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:57:42,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (46)] Forceful destruction successful, exit code 0 [2021-11-12 22:57:42,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2021-11-12 22:57:42,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:57:42,953 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:57:42,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:57:42,953 INFO L85 PathProgramCache]: Analyzing trace with hash 813641582, now seen corresponding path program 1 times [2021-11-12 22:57:42,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:57:42,956 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1499160559] [2021-11-12 22:57:42,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:57:42,957 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:57:42,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:57:42,960 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:57:42,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2021-11-12 22:57:47,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:57:47,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 2697 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 22:57:47,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:57:49,858 INFO L134 CoverageAnalysis]: Checked inductivity of 905 backedges. 455 proven. 2 refuted. 0 times theorem prover too weak. 448 trivial. 0 not checked. [2021-11-12 22:57:49,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:57:51,952 INFO L134 CoverageAnalysis]: Checked inductivity of 905 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 896 trivial. 0 not checked. [2021-11-12 22:57:51,952 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:57:51,952 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1499160559] [2021-11-12 22:57:51,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1499160559] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:57:51,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [768055069] [2021-11-12 22:57:51,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:57:51,953 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:57:51,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:57:51,959 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:57:51,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (48)] Waiting until timeout for monitored process [2021-11-12 22:57:54,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:57:54,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 2697 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 22:57:54,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:57:55,400 INFO L134 CoverageAnalysis]: Checked inductivity of 905 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 893 trivial. 0 not checked. [2021-11-12 22:57:55,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:57:56,257 INFO L134 CoverageAnalysis]: Checked inductivity of 905 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2021-11-12 22:57:56,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [768055069] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:57:56,258 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:57:56,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [9, 9] total 19 [2021-11-12 22:57:56,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220185628] [2021-11-12 22:57:56,259 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:57:56,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:57:56,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:57:56,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:57:56,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-11-12 22:57:56,261 INFO L87 Difference]: Start difference. First operand 4204 states and 5900 transitions. Second operand has 5 states, 4 states have (on average 55.5) internal successors, (222), 4 states have internal predecessors, (222), 3 states have call successors, (59), 3 states have call predecessors, (59), 2 states have return successors, (57), 2 states have call predecessors, (57), 2 states have call successors, (57) [2021-11-12 22:57:56,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:57:56,977 INFO L93 Difference]: Finished difference Result 8506 states and 11971 transitions. [2021-11-12 22:57:56,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:57:56,978 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 55.5) internal successors, (222), 4 states have internal predecessors, (222), 3 states have call successors, (59), 3 states have call predecessors, (59), 2 states have return successors, (57), 2 states have call predecessors, (57), 2 states have call successors, (57) Word has length 488 [2021-11-12 22:57:56,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:57:56,981 INFO L225 Difference]: With dead ends: 8506 [2021-11-12 22:57:56,981 INFO L226 Difference]: Without dead ends: 0 [2021-11-12 22:57:57,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1950 GetRequests, 1932 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-11-12 22:57:57,006 INFO L933 BasicCegarLoop]: 2398 mSDtfsCounter, 103 mSDsluCounter, 7061 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 9459 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.29ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.76ms IncrementalHoareTripleChecker+Time [2021-11-12 22:57:57,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 9459 Invalid, 13 Unknown, 0 Unchecked, 12.29ms Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 36.76ms Time] [2021-11-12 22:57:57,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-12 22:57:57,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-12 22:57:57,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:57:57,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-12 22:57:57,010 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 488 [2021-11-12 22:57:57,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:57:57,010 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-12 22:57:57,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 55.5) internal successors, (222), 4 states have internal predecessors, (222), 3 states have call successors, (59), 3 states have call predecessors, (59), 2 states have return successors, (57), 2 states have call predecessors, (57), 2 states have call successors, (57) [2021-11-12 22:57:57,011 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-12 22:57:57,011 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-12 22:57:57,014 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-12 22:57:57,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (48)] Forceful destruction successful, exit code 0 [2021-11-12 22:57:57,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2021-11-12 22:57:57,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_636e92b5-d355-4936-b4fc-cc071bd8113b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:57:57,424 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-12 22:58:03,985 WARN L227 SmtUtils]: Spent 5.37s on a formula simplification that was a NOOP. DAG size: 152 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-12 22:58:16,632 WARN L227 SmtUtils]: Spent 12.28s on a formula simplification that was a NOOP. DAG size: 175 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-12 22:59:01,459 WARN L227 SmtUtils]: Spent 10.97s on a formula simplification that was a NOOP. DAG size: 170 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-12 22:59:22,495 WARN L227 SmtUtils]: Spent 10.46s on a formula simplification that was a NOOP. DAG size: 165 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or)