./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test4-3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- 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_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/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_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test4-3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/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 32bit --witnessprinter.graph.data.programhash efaea2320311f06fbd3071893d75fb70222c33e449b43348105f12b548a90ab4 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 01:35:54,778 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 01:35:54,781 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 01:35:54,819 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 01:35:54,820 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 01:35:54,822 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 01:35:54,824 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 01:35:54,827 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 01:35:54,830 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 01:35:54,831 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 01:35:54,833 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 01:35:54,835 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 01:35:54,835 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 01:35:54,837 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 01:35:54,839 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 01:35:54,841 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 01:35:54,843 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 01:35:54,844 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 01:35:54,847 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 01:35:54,850 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 01:35:54,853 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 01:35:54,855 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 01:35:54,856 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 01:35:54,858 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 01:35:54,862 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 01:35:54,863 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 01:35:54,863 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 01:35:54,865 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 01:35:54,866 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 01:35:54,867 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 01:35:54,868 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 01:35:54,869 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 01:35:54,870 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 01:35:54,871 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 01:35:54,873 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 01:35:54,873 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 01:35:54,874 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 01:35:54,875 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 01:35:54,875 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 01:35:54,876 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 01:35:54,877 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 01:35:54,878 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-13 01:35:54,906 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 01:35:54,906 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 01:35:54,907 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 01:35:54,908 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 01:35:54,908 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 01:35:54,908 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 01:35:54,908 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 01:35:54,909 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-13 01:35:54,909 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 01:35:54,909 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 01:35:54,909 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-13 01:35:54,910 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-13 01:35:54,910 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 01:35:54,910 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-13 01:35:54,911 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-13 01:35:54,911 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-13 01:35:54,912 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 01:35:54,912 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 01:35:54,912 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 01:35:54,912 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 01:35:54,913 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 01:35:54,913 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 01:35:54,913 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 01:35:54,914 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 01:35:54,914 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 01:35:54,914 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 01:35:54,914 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 01:35:54,915 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 01:35:54,915 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 01:35:54,915 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 01:35:54,916 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 01:35:54,916 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 01:35:54,916 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 01:35:54,917 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 01:35:54,917 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 01:35:54,917 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-13 01:35:54,917 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 01:35:54,918 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 01:35:54,918 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 01:35:54,918 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 01:35:54,918 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_ab09e947-8fb4-41f6-be9d-8b7e83025d52/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> efaea2320311f06fbd3071893d75fb70222c33e449b43348105f12b548a90ab4 [2021-11-13 01:35:55,230 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 01:35:55,259 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 01:35:55,264 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 01:35:55,265 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 01:35:55,266 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 01:35:55,269 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test4-3.i [2021-11-13 01:35:55,384 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/data/8fc24626b/f8a4e5ea2be94518b1f6f30df3dfa1a5/FLAGcc347f08b [2021-11-13 01:35:56,180 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 01:35:56,181 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test4-3.i [2021-11-13 01:35:56,215 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/data/8fc24626b/f8a4e5ea2be94518b1f6f30df3dfa1a5/FLAGcc347f08b [2021-11-13 01:35:56,308 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/data/8fc24626b/f8a4e5ea2be94518b1f6f30df3dfa1a5 [2021-11-13 01:35:56,311 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 01:35:56,313 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 01:35:56,317 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 01:35:56,317 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 01:35:56,320 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 01:35:56,321 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:35:56" (1/1) ... [2021-11-13 01:35:56,322 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@488f448f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:35:56, skipping insertion in model container [2021-11-13 01:35:56,323 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:35:56" (1/1) ... [2021-11-13 01:35:56,332 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 01:35:56,418 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 01:35:57,014 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_ab09e947-8fb4-41f6-be9d-8b7e83025d52/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test4-3.i[33021,33034] [2021-11-13 01:35:57,289 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:35:57,309 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) [2021-11-13 01:35:57,310 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@17ffafac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:35:57, skipping insertion in model container [2021-11-13 01:35:57,311 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 01:35:57,311 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-13 01:35:57,315 INFO L158 Benchmark]: Toolchain (without parser) took 999.23ms. Allocated memory was 100.7MB in the beginning and 136.3MB in the end (delta: 35.7MB). Free memory was 64.4MB in the beginning and 98.3MB in the end (delta: -33.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-13 01:35:57,317 INFO L158 Benchmark]: CDTParser took 0.36ms. Allocated memory is still 100.7MB. Free memory was 57.5MB in the beginning and 57.4MB in the end (delta: 69.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 01:35:57,320 INFO L158 Benchmark]: CACSL2BoogieTranslator took 994.54ms. Allocated memory was 100.7MB in the beginning and 136.3MB in the end (delta: 35.7MB). Free memory was 64.2MB in the beginning and 98.3MB in the end (delta: -34.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-13 01:35:57,323 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36ms. Allocated memory is still 100.7MB. Free memory was 57.5MB in the beginning and 57.4MB in the end (delta: 69.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 994.54ms. Allocated memory was 100.7MB in the beginning and 136.3MB in the end (delta: 35.7MB). Free memory was 64.2MB in the beginning and 98.3MB in the end (delta: -34.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 752]: 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_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/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_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test4-3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/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 32bit --witnessprinter.graph.data.programhash efaea2320311f06fbd3071893d75fb70222c33e449b43348105f12b548a90ab4 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 01:35:59,982 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 01:35:59,987 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 01:36:00,054 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 01:36:00,055 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 01:36:00,060 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 01:36:00,062 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 01:36:00,068 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 01:36:00,072 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 01:36:00,085 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 01:36:00,086 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 01:36:00,087 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 01:36:00,088 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 01:36:00,089 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 01:36:00,091 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 01:36:00,093 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 01:36:00,094 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 01:36:00,095 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 01:36:00,098 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 01:36:00,100 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 01:36:00,103 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 01:36:00,104 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 01:36:00,106 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 01:36:00,107 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 01:36:00,111 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 01:36:00,112 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 01:36:00,112 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 01:36:00,113 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 01:36:00,114 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 01:36:00,115 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 01:36:00,116 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 01:36:00,117 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 01:36:00,118 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 01:36:00,119 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 01:36:00,121 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 01:36:00,121 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 01:36:00,122 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 01:36:00,123 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 01:36:00,133 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 01:36:00,135 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 01:36:00,136 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 01:36:00,137 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-13 01:36:00,167 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 01:36:00,167 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 01:36:00,168 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 01:36:00,169 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 01:36:00,169 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 01:36:00,169 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 01:36:00,169 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 01:36:00,170 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 01:36:00,170 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 01:36:00,170 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 01:36:00,171 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 01:36:00,171 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 01:36:00,171 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 01:36:00,172 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 01:36:00,172 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 01:36:00,172 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 01:36:00,172 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 01:36:00,172 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 01:36:00,173 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-13 01:36:00,173 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-13 01:36:00,173 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 01:36:00,173 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 01:36:00,173 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 01:36:00,174 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 01:36:00,174 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 01:36:00,174 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 01:36:00,174 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 01:36:00,175 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 01:36:00,175 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 01:36:00,175 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 01:36:00,175 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 01:36:00,176 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-13 01:36:00,176 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-13 01:36:00,176 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 01:36:00,176 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 01:36:00,177 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 01:36:00,177 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_ab09e947-8fb4-41f6-be9d-8b7e83025d52/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> efaea2320311f06fbd3071893d75fb70222c33e449b43348105f12b548a90ab4 [2021-11-13 01:36:00,669 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 01:36:00,697 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 01:36:00,702 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 01:36:00,703 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 01:36:00,705 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 01:36:00,707 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test4-3.i [2021-11-13 01:36:00,800 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/data/d335d1e17/9ab3bc69a7e34092a0aebcdfa660a071/FLAGa41cca4cd [2021-11-13 01:36:01,666 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 01:36:01,667 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test4-3.i [2021-11-13 01:36:01,703 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/data/d335d1e17/9ab3bc69a7e34092a0aebcdfa660a071/FLAGa41cca4cd [2021-11-13 01:36:01,816 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/data/d335d1e17/9ab3bc69a7e34092a0aebcdfa660a071 [2021-11-13 01:36:01,819 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 01:36:01,820 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 01:36:01,821 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 01:36:01,822 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 01:36:01,824 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 01:36:01,824 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:36:01" (1/1) ... [2021-11-13 01:36:01,826 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5165cd61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:36:01, skipping insertion in model container [2021-11-13 01:36:01,827 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:36:01" (1/1) ... [2021-11-13 01:36:01,834 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 01:36:01,933 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 01:36:02,481 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_ab09e947-8fb4-41f6-be9d-8b7e83025d52/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test4-3.i[33021,33034] [2021-11-13 01:36:02,706 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:36:02,726 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-13 01:36:02,765 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 01:36:02,812 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_ab09e947-8fb4-41f6-be9d-8b7e83025d52/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test4-3.i[33021,33034] [2021-11-13 01:36:03,049 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:36:03,065 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 01:36:03,100 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_ab09e947-8fb4-41f6-be9d-8b7e83025d52/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test4-3.i[33021,33034] [2021-11-13 01:36:03,211 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:36:03,276 INFO L208 MainTranslator]: Completed translation [2021-11-13 01:36:03,277 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:36:03 WrapperNode [2021-11-13 01:36:03,277 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 01:36:03,279 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 01:36:03,279 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 01:36:03,279 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 01:36:03,288 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:36:03" (1/1) ... [2021-11-13 01:36:03,351 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:36:03" (1/1) ... [2021-11-13 01:36:03,482 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 01:36:03,483 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 01:36:03,483 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 01:36:03,483 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 01:36:03,494 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:36:03" (1/1) ... [2021-11-13 01:36:03,494 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:36:03" (1/1) ... [2021-11-13 01:36:03,507 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:36:03" (1/1) ... [2021-11-13 01:36:03,508 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:36:03" (1/1) ... [2021-11-13 01:36:03,591 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:36:03" (1/1) ... [2021-11-13 01:36:03,609 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:36:03" (1/1) ... [2021-11-13 01:36:03,617 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:36:03" (1/1) ... [2021-11-13 01:36:03,633 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 01:36:03,646 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 01:36:03,646 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 01:36:03,646 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 01:36:03,647 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:36:03" (1/1) ... [2021-11-13 01:36:03,655 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 01:36:03,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:36:03,690 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 01:36:03,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 01:36:03,758 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-13 01:36:03,758 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-13 01:36:03,759 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-13 01:36:03,760 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-13 01:36:03,760 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-13 01:36:03,760 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-13 01:36:03,760 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-13 01:36:03,760 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-13 01:36:03,761 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 01:36:03,761 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-13 01:36:03,761 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-13 01:36:03,762 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-13 01:36:03,762 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-13 01:36:03,762 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 01:36:03,762 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 01:36:15,619 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 01:36:15,619 INFO L299 CfgBuilder]: Removed 77 assume(true) statements. [2021-11-13 01:36:15,622 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 01:36:15 BoogieIcfgContainer [2021-11-13 01:36:15,623 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 01:36:15,625 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 01:36:15,625 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 01:36:15,629 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 01:36:15,629 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 01:36:01" (1/3) ... [2021-11-13 01:36:15,630 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a5bcc37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 01:36:15, skipping insertion in model container [2021-11-13 01:36:15,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:36:03" (2/3) ... [2021-11-13 01:36:15,631 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a5bcc37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 01:36:15, skipping insertion in model container [2021-11-13 01:36:15,631 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 01:36:15" (3/3) ... [2021-11-13 01:36:15,633 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_FNV_test4-3.i [2021-11-13 01:36:15,640 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 01:36:15,640 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 01:36:15,703 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 01:36:15,711 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 [2021-11-13 01:36:15,712 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 01:36:15,743 INFO L276 IsEmpty]: Start isEmpty. Operand has 261 states, 241 states have (on average 1.6887966804979253) internal successors, (407), 252 states have internal predecessors, (407), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-13 01:36:15,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-13 01:36:15,751 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:36:15,752 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:36:15,752 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:36:15,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:36:15,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1523630084, now seen corresponding path program 1 times [2021-11-13 01:36:15,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:36:15,775 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [49281717] [2021-11-13 01:36:15,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:36:15,776 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:36:15,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:36:15,784 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:36:15,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-13 01:36:16,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:36:16,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 01:36:16,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:36:16,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:36:16,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:36:16,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:36:16,270 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:36:16,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [49281717] [2021-11-13 01:36:16,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [49281717] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:36:16,272 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:36:16,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-13 01:36:16,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159247206] [2021-11-13 01:36:16,275 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:36:16,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 01:36:16,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:36:16,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 01:36:16,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 01:36:16,352 INFO L87 Difference]: Start difference. First operand has 261 states, 241 states have (on average 1.6887966804979253) internal successors, (407), 252 states have internal predecessors, (407), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:36:16,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:36:16,793 INFO L93 Difference]: Finished difference Result 691 states and 1180 transitions. [2021-11-13 01:36:16,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 01:36:16,797 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-13 01:36:16,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:36:16,815 INFO L225 Difference]: With dead ends: 691 [2021-11-13 01:36:16,816 INFO L226 Difference]: Without dead ends: 378 [2021-11-13 01:36:16,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 01:36:16,827 INFO L933 BasicCegarLoop]: 389 mSDtfsCounter, 601 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 271.85ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 613 SdHoareTripleChecker+Valid, 732 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.52ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 298.83ms IncrementalHoareTripleChecker+Time [2021-11-13 01:36:16,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [613 Valid, 732 Invalid, 22 Unknown, 0 Unchecked, 16.52ms Time], IncrementalHoareTripleChecker [8 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 298.83ms Time] [2021-11-13 01:36:16,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-11-13 01:36:16,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 378. [2021-11-13 01:36:16,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 353 states have (on average 1.3087818696883853) internal successors, (462), 363 states have internal predecessors, (462), 22 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (22), 13 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-13 01:36:16,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 506 transitions. [2021-11-13 01:36:16,952 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 506 transitions. Word has length 10 [2021-11-13 01:36:16,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:36:16,953 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 506 transitions. [2021-11-13 01:36:16,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:36:16,954 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 506 transitions. [2021-11-13 01:36:16,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-11-13 01:36:16,970 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:36:16,971 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:36:16,992 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-13 01:36:17,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:36:17,184 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:36:17,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:36:17,186 INFO L85 PathProgramCache]: Analyzing trace with hash 930997070, now seen corresponding path program 1 times [2021-11-13 01:36:17,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:36:17,199 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1294889362] [2021-11-13 01:36:17,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:36:17,201 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:36:17,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:36:17,202 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:36:17,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-13 01:36:18,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:36:18,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:36:18,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:36:18,916 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-13 01:36:18,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:36:19,635 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-13 01:36:19,635 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:36:19,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1294889362] [2021-11-13 01:36:19,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1294889362] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:36:19,636 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:36:19,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-13 01:36:19,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282209721] [2021-11-13 01:36:19,637 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:36:19,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 01:36:19,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:36:19,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 01:36:19,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 01:36:19,647 INFO L87 Difference]: Start difference. First operand 378 states and 506 transitions. Second operand has 5 states, 5 states have (on average 23.8) internal successors, (119), 5 states have internal predecessors, (119), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:36:19,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:36:19,835 INFO L93 Difference]: Finished difference Result 756 states and 1018 transitions. [2021-11-13 01:36:19,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 01:36:19,837 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 206 [2021-11-13 01:36:19,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:36:19,841 INFO L225 Difference]: With dead ends: 756 [2021-11-13 01:36:19,841 INFO L226 Difference]: Without dead ends: 386 [2021-11-13 01:36:19,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 407 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:36:19,847 INFO L933 BasicCegarLoop]: 258 mSDtfsCounter, 225 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 103.82ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.27ms SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 130.62ms IncrementalHoareTripleChecker+Time [2021-11-13 01:36:19,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 567 Invalid, 69 Unknown, 0 Unchecked, 7.27ms Time], IncrementalHoareTripleChecker [30 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 130.62ms Time] [2021-11-13 01:36:19,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-11-13 01:36:19,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 384. [2021-11-13 01:36:19,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 359 states have (on average 1.2590529247910864) internal successors, (452), 369 states have internal predecessors, (452), 22 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (22), 13 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-13 01:36:19,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 496 transitions. [2021-11-13 01:36:19,903 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 496 transitions. Word has length 206 [2021-11-13 01:36:19,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:36:19,904 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 496 transitions. [2021-11-13 01:36:19,904 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:36:19,904 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 496 transitions. [2021-11-13 01:36:19,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-11-13 01:36:19,922 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:36:19,923 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:36:19,957 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-13 01:36:20,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:36:20,145 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:36:20,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:36:20,145 INFO L85 PathProgramCache]: Analyzing trace with hash 2112529974, now seen corresponding path program 1 times [2021-11-13 01:36:20,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:36:20,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [72116816] [2021-11-13 01:36:20,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:36:20,150 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:36:20,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:36:20,151 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:36:20,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-13 01:36:20,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:36:20,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:36:20,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:36:21,796 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-13 01:36:21,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:36:22,719 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-13 01:36:22,720 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:36:22,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [72116816] [2021-11-13 01:36:22,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [72116816] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:36:22,722 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:36:22,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-13 01:36:22,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496511598] [2021-11-13 01:36:22,727 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:36:22,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 01:36:22,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:36:22,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 01:36:22,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 01:36:22,734 INFO L87 Difference]: Start difference. First operand 384 states and 496 transitions. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:36:23,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:36:23,119 INFO L93 Difference]: Finished difference Result 713 states and 930 transitions. [2021-11-13 01:36:23,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 01:36:23,128 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 206 [2021-11-13 01:36:23,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:36:23,132 INFO L225 Difference]: With dead ends: 713 [2021-11-13 01:36:23,132 INFO L226 Difference]: Without dead ends: 382 [2021-11-13 01:36:23,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 409 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 01:36:23,135 INFO L933 BasicCegarLoop]: 269 mSDtfsCounter, 11 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 345.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.83ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 358.84ms IncrementalHoareTripleChecker+Time [2021-11-13 01:36:23,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 523 Invalid, 8 Unknown, 0 Unchecked, 2.83ms Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 358.84ms Time] [2021-11-13 01:36:23,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-11-13 01:36:23,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 382. [2021-11-13 01:36:23,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 357 states have (on average 1.257703081232493) internal successors, (449), 367 states have internal predecessors, (449), 22 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (22), 13 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-13 01:36:23,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 493 transitions. [2021-11-13 01:36:23,169 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 493 transitions. Word has length 206 [2021-11-13 01:36:23,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:36:23,170 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 493 transitions. [2021-11-13 01:36:23,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:36:23,170 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 493 transitions. [2021-11-13 01:36:23,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2021-11-13 01:36:23,175 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:36:23,176 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:36:23,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-13 01:36:23,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:36:23,392 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:36:23,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:36:23,393 INFO L85 PathProgramCache]: Analyzing trace with hash 2039357527, now seen corresponding path program 1 times [2021-11-13 01:36:23,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:36:23,396 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1020255085] [2021-11-13 01:36:23,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:36:23,397 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:36:23,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:36:23,398 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:36:23,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-13 01:36:24,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:36:24,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:36:24,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:36:24,825 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-11-13 01:36:24,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:36:25,549 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 37 proven. 3 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-13 01:36:25,550 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:36:25,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1020255085] [2021-11-13 01:36:25,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1020255085] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:36:25,551 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:36:25,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-13 01:36:25,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617980154] [2021-11-13 01:36:25,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:36:25,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 01:36:25,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:36:25,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 01:36:25,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:36:25,554 INFO L87 Difference]: Start difference. First operand 382 states and 493 transitions. Second operand has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-13 01:36:25,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:36:25,663 INFO L93 Difference]: Finished difference Result 720 states and 949 transitions. [2021-11-13 01:36:25,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 01:36:25,665 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 221 [2021-11-13 01:36:25,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:36:25,669 INFO L225 Difference]: With dead ends: 720 [2021-11-13 01:36:25,670 INFO L226 Difference]: Without dead ends: 385 [2021-11-13 01:36:25,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 436 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:36:25,673 INFO L933 BasicCegarLoop]: 266 mSDtfsCounter, 2 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 57.99ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 791 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.81ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 67.68ms IncrementalHoareTripleChecker+Time [2021-11-13 01:36:25,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 791 Invalid, 21 Unknown, 0 Unchecked, 3.81ms Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 67.68ms Time] [2021-11-13 01:36:25,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2021-11-13 01:36:25,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 385. [2021-11-13 01:36:25,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 359 states have (on average 1.2590529247910864) internal successors, (452), 370 states have internal predecessors, (452), 22 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (26), 13 states have call predecessors, (26), 22 states have call successors, (26) [2021-11-13 01:36:25,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 500 transitions. [2021-11-13 01:36:25,715 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 500 transitions. Word has length 221 [2021-11-13 01:36:25,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:36:25,716 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 500 transitions. [2021-11-13 01:36:25,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-13 01:36:25,717 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 500 transitions. [2021-11-13 01:36:25,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2021-11-13 01:36:25,722 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:36:25,722 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:36:25,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-13 01:36:25,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:36:25,944 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:36:25,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:36:25,944 INFO L85 PathProgramCache]: Analyzing trace with hash -428528199, now seen corresponding path program 1 times [2021-11-13 01:36:25,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:36:25,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [142596200] [2021-11-13 01:36:25,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:36:25,947 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:36:25,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:36:25,949 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:36:25,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-13 01:36:26,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:36:26,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:36:26,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:36:27,272 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 44 proven. 1 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-13 01:36:27,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:36:27,967 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 37 proven. 7 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-13 01:36:27,967 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:36:27,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [142596200] [2021-11-13 01:36:27,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [142596200] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:36:27,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1667924576] [2021-11-13 01:36:27,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:36:27,968 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:36:27,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:36:27,971 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:36:27,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-13 01:36:28,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:36:28,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-13 01:36:28,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:36:29,226 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-13 01:36:29,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:36:30,440 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-13 01:36:30,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1667924576] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:36:30,441 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 01:36:30,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 10] imperfect sequences [5, 5] total 16 [2021-11-13 01:36:30,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900234572] [2021-11-13 01:36:30,442 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:36:30,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-13 01:36:30,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:36:30,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-13 01:36:30,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-11-13 01:36:30,446 INFO L87 Difference]: Start difference. First operand 385 states and 500 transitions. Second operand has 10 states, 10 states have (on average 20.5) internal successors, (205), 10 states have internal predecessors, (205), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-13 01:36:30,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:36:30,778 INFO L93 Difference]: Finished difference Result 716 states and 946 transitions. [2021-11-13 01:36:30,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 01:36:30,779 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 20.5) internal successors, (205), 10 states have internal predecessors, (205), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 223 [2021-11-13 01:36:30,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:36:30,784 INFO L225 Difference]: With dead ends: 716 [2021-11-13 01:36:30,784 INFO L226 Difference]: Without dead ends: 431 [2021-11-13 01:36:30,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 888 GetRequests, 874 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-11-13 01:36:30,787 INFO L933 BasicCegarLoop]: 252 mSDtfsCounter, 44 mSDsluCounter, 687 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 249.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 939 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.17ms SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 288.83ms IncrementalHoareTripleChecker+Time [2021-11-13 01:36:30,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 939 Invalid, 186 Unknown, 0 Unchecked, 6.17ms Time], IncrementalHoareTripleChecker [86 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 288.83ms Time] [2021-11-13 01:36:30,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-11-13 01:36:30,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 425. [2021-11-13 01:36:30,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 399 states have (on average 1.2330827067669172) internal successors, (492), 410 states have internal predecessors, (492), 22 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (26), 13 states have call predecessors, (26), 22 states have call successors, (26) [2021-11-13 01:36:30,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 540 transitions. [2021-11-13 01:36:30,817 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 540 transitions. Word has length 223 [2021-11-13 01:36:30,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:36:30,818 INFO L470 AbstractCegarLoop]: Abstraction has 425 states and 540 transitions. [2021-11-13 01:36:30,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 20.5) internal successors, (205), 10 states have internal predecessors, (205), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-13 01:36:30,819 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 540 transitions. [2021-11-13 01:36:30,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2021-11-13 01:36:30,825 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:36:30,825 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:36:30,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-13 01:36:31,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-11-13 01:36:31,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 01:36:31,240 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:36:31,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:36:31,241 INFO L85 PathProgramCache]: Analyzing trace with hash 188730933, now seen corresponding path program 1 times [2021-11-13 01:36:31,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:36:31,243 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1059790464] [2021-11-13 01:36:31,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:36:31,243 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:36:31,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:36:31,245 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:36:31,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-13 01:36:31,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:36:31,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:36:32,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:36:32,578 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 44 proven. 1 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-13 01:36:32,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:36:33,235 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 37 proven. 7 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-13 01:36:33,235 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:36:33,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1059790464] [2021-11-13 01:36:33,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1059790464] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:36:33,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [519326273] [2021-11-13 01:36:33,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:36:33,237 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:36:33,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:36:33,238 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:36:33,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-13 01:36:33,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:36:33,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:36:33,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:36:35,577 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-13 01:36:35,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:36:37,376 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-13 01:36:37,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [519326273] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:36:37,376 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 01:36:37,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-13 01:36:37,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892769670] [2021-11-13 01:36:37,377 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:36:37,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 01:36:37,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:36:37,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 01:36:37,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-13 01:36:37,380 INFO L87 Difference]: Start difference. First operand 425 states and 540 transitions. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-13 01:36:38,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:36:38,034 INFO L93 Difference]: Finished difference Result 694 states and 890 transitions. [2021-11-13 01:36:38,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 01:36:38,044 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 223 [2021-11-13 01:36:38,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:36:38,049 INFO L225 Difference]: With dead ends: 694 [2021-11-13 01:36:38,049 INFO L226 Difference]: Without dead ends: 423 [2021-11-13 01:36:38,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 888 GetRequests, 881 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-13 01:36:38,052 INFO L933 BasicCegarLoop]: 272 mSDtfsCounter, 60 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 597.79ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.61ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 618.85ms IncrementalHoareTripleChecker+Time [2021-11-13 01:36:38,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 525 Invalid, 9 Unknown, 0 Unchecked, 3.61ms Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 618.85ms Time] [2021-11-13 01:36:38,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-11-13 01:36:38,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 423. [2021-11-13 01:36:38,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 397 states have (on average 1.2317380352644836) internal successors, (489), 408 states have internal predecessors, (489), 22 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (26), 13 states have call predecessors, (26), 22 states have call successors, (26) [2021-11-13 01:36:38,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 537 transitions. [2021-11-13 01:36:38,078 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 537 transitions. Word has length 223 [2021-11-13 01:36:38,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:36:38,079 INFO L470 AbstractCegarLoop]: Abstraction has 423 states and 537 transitions. [2021-11-13 01:36:38,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-13 01:36:38,079 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 537 transitions. [2021-11-13 01:36:38,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2021-11-13 01:36:38,084 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:36:38,085 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-13 01:36:38,118 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-13 01:36:38,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-13 01:36:38,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 01:36:38,507 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:36:38,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:36:38,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1944112150, now seen corresponding path program 1 times [2021-11-13 01:36:38,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:36:38,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2024528360] [2021-11-13 01:36:38,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:36:38,510 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:36:38,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:36:38,511 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:36:38,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-13 01:36:39,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:36:39,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 614 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:36:39,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:36:39,837 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 58 proven. 1 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-13 01:36:39,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:36:40,510 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 37 proven. 19 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-13 01:36:40,511 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:36:40,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2024528360] [2021-11-13 01:36:40,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2024528360] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:36:40,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1050983884] [2021-11-13 01:36:40,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:36:40,511 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:36:40,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:36:40,512 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:36:40,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-13 01:36:41,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:36:41,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 614 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 01:36:41,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:36:41,754 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-13 01:36:41,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:36:42,319 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-13 01:36:42,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1050983884] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:36:42,319 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 01:36:42,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 13 [2021-11-13 01:36:42,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147121980] [2021-11-13 01:36:42,320 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:36:42,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 01:36:42,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:36:42,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 01:36:42,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-11-13 01:36:42,322 INFO L87 Difference]: Start difference. First operand 423 states and 537 transitions. Second operand has 7 states, 7 states have (on average 27.285714285714285) internal successors, (191), 7 states have internal predecessors, (191), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-13 01:36:42,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:36:42,589 INFO L93 Difference]: Finished difference Result 722 states and 931 transitions. [2021-11-13 01:36:42,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 01:36:42,592 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 27.285714285714285) internal successors, (191), 7 states have internal predecessors, (191), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 240 [2021-11-13 01:36:42,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:36:42,596 INFO L225 Difference]: With dead ends: 722 [2021-11-13 01:36:42,596 INFO L226 Difference]: Without dead ends: 391 [2021-11-13 01:36:42,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 956 GetRequests, 945 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-11-13 01:36:42,599 INFO L933 BasicCegarLoop]: 340 mSDtfsCounter, 411 mSDsluCounter, 773 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 166.12ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 1113 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.19ms SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 230.20ms IncrementalHoareTripleChecker+Time [2021-11-13 01:36:42,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [427 Valid, 1113 Invalid, 118 Unknown, 0 Unchecked, 6.19ms Time], IncrementalHoareTripleChecker [50 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 230.20ms Time] [2021-11-13 01:36:42,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-11-13 01:36:42,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 389. [2021-11-13 01:36:42,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 363 states have (on average 1.1928374655647382) internal successors, (433), 374 states have internal predecessors, (433), 22 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (26), 13 states have call predecessors, (26), 22 states have call successors, (26) [2021-11-13 01:36:42,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 481 transitions. [2021-11-13 01:36:42,623 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 481 transitions. Word has length 240 [2021-11-13 01:36:42,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:36:42,624 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 481 transitions. [2021-11-13 01:36:42,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 27.285714285714285) internal successors, (191), 7 states have internal predecessors, (191), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-13 01:36:42,625 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 481 transitions. [2021-11-13 01:36:42,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2021-11-13 01:36:42,629 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:36:42,630 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-13 01:36:42,640 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-13 01:36:42,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-13 01:36:43,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:36:43,035 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:36:43,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:36:43,036 INFO L85 PathProgramCache]: Analyzing trace with hash 678967446, now seen corresponding path program 1 times [2021-11-13 01:36:43,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:36:43,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [435003346] [2021-11-13 01:36:43,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:36:43,038 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:36:43,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:36:43,038 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:36:43,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-13 01:36:43,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:36:43,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 602 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:36:43,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:36:44,349 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 58 proven. 1 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-13 01:36:44,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:36:45,043 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 37 proven. 19 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-13 01:36:45,043 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:36:45,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [435003346] [2021-11-13 01:36:45,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [435003346] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:36:45,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1490354585] [2021-11-13 01:36:45,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:36:45,044 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:36:45,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:36:45,046 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:36:45,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-13 01:36:46,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:36:46,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 602 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:36:46,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:36:46,684 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 58 proven. 1 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-13 01:36:46,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:36:47,269 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 37 proven. 19 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-13 01:36:47,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1490354585] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:36:47,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332359174] [2021-11-13 01:36:47,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:36:47,270 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:36:47,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:36:47,272 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:36:47,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-13 01:36:47,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:36:47,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 602 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:36:47,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:36:48,817 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-13 01:36:48,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:36:49,909 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-13 01:36:49,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332359174] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:36:49,909 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-13 01:36:49,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 14 [2021-11-13 01:36:49,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134949704] [2021-11-13 01:36:49,911 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-13 01:36:49,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-13 01:36:49,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:36:49,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-13 01:36:49,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-11-13 01:36:49,916 INFO L87 Difference]: Start difference. First operand 389 states and 481 transitions. Second operand has 14 states, 14 states have (on average 42.142857142857146) internal successors, (590), 14 states have internal predecessors, (590), 4 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-13 01:36:53,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:36:53,979 INFO L93 Difference]: Finished difference Result 1446 states and 1829 transitions. [2021-11-13 01:36:53,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-13 01:36:53,981 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 42.142857142857146) internal successors, (590), 14 states have internal predecessors, (590), 4 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) Word has length 240 [2021-11-13 01:36:53,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:36:53,991 INFO L225 Difference]: With dead ends: 1446 [2021-11-13 01:36:53,991 INFO L226 Difference]: Without dead ends: 1104 [2021-11-13 01:36:53,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1443 GetRequests, 1424 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-11-13 01:36:53,994 INFO L933 BasicCegarLoop]: 642 mSDtfsCounter, 1477 mSDsluCounter, 5027 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3368.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1513 SdHoareTripleChecker+Valid, 5669 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 35.68ms SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3686.92ms IncrementalHoareTripleChecker+Time [2021-11-13 01:36:53,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1513 Valid, 5669 Invalid, 664 Unknown, 0 Unchecked, 35.68ms Time], IncrementalHoareTripleChecker [124 Valid, 540 Invalid, 0 Unknown, 0 Unchecked, 3686.92ms Time] [2021-11-13 01:36:53,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1104 states. [2021-11-13 01:36:54,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1104 to 1102. [2021-11-13 01:36:54,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1102 states, 1051 states have (on average 1.1826831588962892) internal successors, (1243), 1062 states have internal predecessors, (1243), 46 states have call successors, (46), 3 states have call predecessors, (46), 4 states have return successors, (58), 37 states have call predecessors, (58), 46 states have call successors, (58) [2021-11-13 01:36:54,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1102 states to 1102 states and 1347 transitions. [2021-11-13 01:36:54,058 INFO L78 Accepts]: Start accepts. Automaton has 1102 states and 1347 transitions. Word has length 240 [2021-11-13 01:36:54,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:36:54,059 INFO L470 AbstractCegarLoop]: Abstraction has 1102 states and 1347 transitions. [2021-11-13 01:36:54,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 42.142857142857146) internal successors, (590), 14 states have internal predecessors, (590), 4 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-13 01:36:54,060 INFO L276 IsEmpty]: Start isEmpty. Operand 1102 states and 1347 transitions. [2021-11-13 01:36:54,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 641 [2021-11-13 01:36:54,082 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:36:54,086 INFO L514 BasicCegarLoop]: trace histogram [12, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:36:54,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-13 01:36:54,305 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-11-13 01:36:54,524 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-11-13 01:36:54,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:36:54,687 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:36:54,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:36:54,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1071950454, now seen corresponding path program 2 times [2021-11-13 01:36:54,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:36:54,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1308969664] [2021-11-13 01:36:54,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 01:36:54,693 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:36:54,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:36:54,694 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:36:54,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-13 01:36:56,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 01:36:56,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 01:36:56,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 1442 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 01:36:56,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:36:57,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 245 proven. 10 refuted. 0 times theorem prover too weak. 1339 trivial. 0 not checked. [2021-11-13 01:36:57,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:36:59,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 181 proven. 71 refuted. 0 times theorem prover too weak. 1342 trivial. 0 not checked. [2021-11-13 01:36:59,571 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:36:59,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1308969664] [2021-11-13 01:36:59,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1308969664] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:36:59,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1025446370] [2021-11-13 01:36:59,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 01:36:59,572 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:36:59,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:36:59,573 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:36:59,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-13 01:37:01,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 01:37:01,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 01:37:01,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 1442 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 01:37:01,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:37:03,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 245 proven. 10 refuted. 0 times theorem prover too weak. 1339 trivial. 0 not checked. [2021-11-13 01:37:03,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:37:04,954 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 181 proven. 71 refuted. 0 times theorem prover too weak. 1342 trivial. 0 not checked. [2021-11-13 01:37:04,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1025446370] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:37:04,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763007553] [2021-11-13 01:37:04,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 01:37:04,955 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:37:04,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:37:04,957 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:37:04,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-13 01:37:06,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 01:37:06,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 01:37:06,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 1442 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 01:37:06,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:37:07,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 274 proven. 3 refuted. 0 times theorem prover too weak. 1317 trivial. 0 not checked. [2021-11-13 01:37:07,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:37:09,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 198 proven. 31 refuted. 0 times theorem prover too weak. 1365 trivial. 0 not checked. [2021-11-13 01:37:09,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763007553] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:37:09,581 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-13 01:37:09,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 6, 6] total 20 [2021-11-13 01:37:09,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707430694] [2021-11-13 01:37:09,583 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-13 01:37:09,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-13 01:37:09,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:37:09,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-13 01:37:09,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2021-11-13 01:37:09,588 INFO L87 Difference]: Start difference. First operand 1102 states and 1347 transitions. Second operand has 20 states, 20 states have (on average 9.5) internal successors, (190), 20 states have internal predecessors, (190), 2 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 01:37:11,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:37:11,395 INFO L93 Difference]: Finished difference Result 2183 states and 2805 transitions. [2021-11-13 01:37:11,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-13 01:37:11,397 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 9.5) internal successors, (190), 20 states have internal predecessors, (190), 2 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 640 [2021-11-13 01:37:11,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:37:11,411 INFO L225 Difference]: With dead ends: 2183 [2021-11-13 01:37:11,412 INFO L226 Difference]: Without dead ends: 1122 [2021-11-13 01:37:11,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3859 GetRequests, 3816 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=554, Invalid=1426, Unknown=0, NotChecked=0, Total=1980 [2021-11-13 01:37:11,422 INFO L933 BasicCegarLoop]: 256 mSDtfsCounter, 144 mSDsluCounter, 2233 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 640.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 2489 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.94ms SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 752.24ms IncrementalHoareTripleChecker+Time [2021-11-13 01:37:11,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 2489 Invalid, 426 Unknown, 0 Unchecked, 6.94ms Time], IncrementalHoareTripleChecker [111 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 752.24ms Time] [2021-11-13 01:37:11,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1122 states. [2021-11-13 01:37:11,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1122 to 1114. [2021-11-13 01:37:11,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1114 states, 1063 states have (on average 1.1843838193791156) internal successors, (1259), 1074 states have internal predecessors, (1259), 46 states have call successors, (46), 3 states have call predecessors, (46), 4 states have return successors, (58), 37 states have call predecessors, (58), 46 states have call successors, (58) [2021-11-13 01:37:11,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1114 states to 1114 states and 1363 transitions. [2021-11-13 01:37:11,507 INFO L78 Accepts]: Start accepts. Automaton has 1114 states and 1363 transitions. Word has length 640 [2021-11-13 01:37:11,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:37:11,508 INFO L470 AbstractCegarLoop]: Abstraction has 1114 states and 1363 transitions. [2021-11-13 01:37:11,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 9.5) internal successors, (190), 20 states have internal predecessors, (190), 2 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 01:37:11,508 INFO L276 IsEmpty]: Start isEmpty. Operand 1114 states and 1363 transitions. [2021-11-13 01:37:11,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 665 [2021-11-13 01:37:11,518 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:37:11,519 INFO L514 BasicCegarLoop]: trace histogram [36, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:37:11,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-13 01:37:11,762 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-11-13 01:37:12,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-13 01:37:12,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:37:12,145 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:37:12,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:37:12,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1097680246, now seen corresponding path program 3 times [2021-11-13 01:37:12,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:37:12,151 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [276360889] [2021-11-13 01:37:12,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 01:37:12,151 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:37:12,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:37:12,153 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:37:12,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab09e947-8fb4-41f6-be9d-8b7e83025d52/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process