./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test5-3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test5-3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5b724500cddd07446974ec59df8ac86aa980f4ff713324fa73d397377235cbe2 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 15:05:20,719 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 15:05:20,721 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 15:05:20,761 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 15:05:20,762 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 15:05:20,764 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 15:05:20,766 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 15:05:20,769 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 15:05:20,772 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 15:05:20,773 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 15:05:20,775 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 15:05:20,777 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 15:05:20,778 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 15:05:20,780 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 15:05:20,782 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 15:05:20,784 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 15:05:20,785 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 15:05:20,787 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 15:05:20,790 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 15:05:20,793 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 15:05:20,796 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 15:05:20,798 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 15:05:20,800 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 15:05:20,802 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 15:05:20,807 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 15:05:20,807 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 15:05:20,808 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 15:05:20,809 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 15:05:20,816 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 15:05:20,818 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 15:05:20,819 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 15:05:20,820 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 15:05:20,823 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 15:05:20,828 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 15:05:20,830 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 15:05:20,831 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 15:05:20,831 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 15:05:20,832 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 15:05:20,832 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 15:05:20,833 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 15:05:20,834 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 15:05:20,835 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 15:05:20,869 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 15:05:20,869 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 15:05:20,870 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 15:05:20,871 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 15:05:20,871 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 15:05:20,871 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 15:05:20,872 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 15:05:20,872 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 15:05:20,873 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 15:05:20,873 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 15:05:20,873 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 15:05:20,873 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 15:05:20,874 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 15:05:20,880 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 15:05:20,880 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 15:05:20,881 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 15:05:20,882 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 15:05:20,882 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 15:05:20,882 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 15:05:20,883 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 15:05:20,883 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 15:05:20,883 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 15:05:20,884 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 15:05:20,884 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 15:05:20,884 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 15:05:20,885 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 15:05:20,885 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 15:05:20,887 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 15:05:20,887 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 15:05:20,887 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 15:05:20,888 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 15:05:20,890 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 15:05:20,891 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 15:05:20,891 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 15:05:20,891 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 15:05:20,891 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 15:05:20,892 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 15:05:20,892 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 15:05:20,892 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 15:05:20,894 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 15:05:20,894 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_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5b724500cddd07446974ec59df8ac86aa980f4ff713324fa73d397377235cbe2 [2021-11-19 15:05:21,235 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 15:05:21,274 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 15:05:21,277 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 15:05:21,278 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 15:05:21,279 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 15:05:21,281 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test5-3.i [2021-11-19 15:05:21,362 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/data/98af9480d/883cd55390d443ff874228bd86bb227a/FLAG966e2af9a [2021-11-19 15:05:22,121 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 15:05:22,122 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test5-3.i [2021-11-19 15:05:22,163 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/data/98af9480d/883cd55390d443ff874228bd86bb227a/FLAG966e2af9a [2021-11-19 15:05:22,258 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/data/98af9480d/883cd55390d443ff874228bd86bb227a [2021-11-19 15:05:22,261 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 15:05:22,263 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 15:05:22,269 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 15:05:22,269 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 15:05:22,274 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 15:05:22,275 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:05:22" (1/1) ... [2021-11-19 15:05:22,278 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22afd8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:05:22, skipping insertion in model container [2021-11-19 15:05:22,279 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:05:22" (1/1) ... [2021-11-19 15:05:22,287 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 15:05:22,383 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 15:05:22,923 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test5-3.i[33021,33034] [2021-11-19 15:05:23,083 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test5-3.i[49681,49694] [2021-11-19 15:05:23,110 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:05:23,121 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-19 15:05:23,122 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@582c4f2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:05:23, skipping insertion in model container [2021-11-19 15:05:23,122 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 15:05:23,122 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 15:05:23,125 INFO L158 Benchmark]: Toolchain (without parser) took 860.23ms. Allocated memory is still 109.1MB. Free memory was 64.0MB in the beginning and 68.1MB in the end (delta: -4.1MB). Peak memory consumption was 6.9MB. Max. memory is 16.1GB. [2021-11-19 15:05:23,126 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 109.1MB. Free memory was 83.5MB in the beginning and 83.5MB in the end (delta: 90.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 15:05:23,127 INFO L158 Benchmark]: CACSL2BoogieTranslator took 853.47ms. Allocated memory is still 109.1MB. Free memory was 63.8MB in the beginning and 68.1MB in the end (delta: -4.3MB). Peak memory consumption was 6.9MB. Max. memory is 16.1GB. [2021-11-19 15:05:23,129 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 109.1MB. Free memory was 83.5MB in the beginning and 83.5MB in the end (delta: 90.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 853.47ms. Allocated memory is still 109.1MB. Free memory was 63.8MB in the beginning and 68.1MB in the end (delta: -4.3MB). Peak memory consumption was 6.9MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 737]: 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_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test5-3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5b724500cddd07446974ec59df8ac86aa980f4ff713324fa73d397377235cbe2 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 15:05:25,889 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 15:05:25,892 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 15:05:25,939 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 15:05:25,940 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 15:05:25,945 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 15:05:25,949 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 15:05:25,960 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 15:05:25,964 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 15:05:25,974 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 15:05:25,976 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 15:05:25,977 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 15:05:25,978 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 15:05:25,979 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 15:05:25,981 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 15:05:25,983 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 15:05:25,985 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 15:05:25,989 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 15:05:25,995 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 15:05:26,005 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 15:05:26,009 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 15:05:26,011 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 15:05:26,014 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 15:05:26,017 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 15:05:26,029 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 15:05:26,029 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 15:05:26,030 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 15:05:26,032 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 15:05:26,033 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 15:05:26,035 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 15:05:26,036 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 15:05:26,037 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 15:05:26,040 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 15:05:26,041 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 15:05:26,043 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 15:05:26,043 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 15:05:26,059 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 15:05:26,060 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 15:05:26,060 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 15:05:26,062 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 15:05:26,063 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 15:05:26,064 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 15:05:26,111 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 15:05:26,112 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 15:05:26,113 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 15:05:26,113 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 15:05:26,114 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 15:05:26,114 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 15:05:26,114 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 15:05:26,115 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 15:05:26,115 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 15:05:26,115 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 15:05:26,118 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 15:05:26,118 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 15:05:26,118 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 15:05:26,119 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 15:05:26,119 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 15:05:26,119 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 15:05:26,119 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 15:05:26,120 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 15:05:26,120 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 15:05:26,120 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 15:05:26,120 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 15:05:26,120 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 15:05:26,121 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 15:05:26,121 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 15:05:26,121 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 15:05:26,121 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 15:05:26,122 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 15:05:26,122 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 15:05:26,122 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 15:05:26,122 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 15:05:26,123 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 15:05:26,123 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 15:05:26,123 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 15:05:26,123 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 15:05:26,124 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 15:05:26,124 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 15:05:26,124 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_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5b724500cddd07446974ec59df8ac86aa980f4ff713324fa73d397377235cbe2 [2021-11-19 15:05:26,569 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 15:05:26,606 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 15:05:26,609 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 15:05:26,611 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 15:05:26,614 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 15:05:26,617 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test5-3.i [2021-11-19 15:05:26,706 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/data/03ddb6031/dda693e68652462f9159665598a6c78d/FLAG394ee974f [2021-11-19 15:05:27,553 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 15:05:27,560 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test5-3.i [2021-11-19 15:05:27,597 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/data/03ddb6031/dda693e68652462f9159665598a6c78d/FLAG394ee974f [2021-11-19 15:05:27,618 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/data/03ddb6031/dda693e68652462f9159665598a6c78d [2021-11-19 15:05:27,621 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 15:05:27,624 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 15:05:27,628 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 15:05:27,629 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 15:05:27,633 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 15:05:27,634 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:05:27" (1/1) ... [2021-11-19 15:05:27,636 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@732f1c4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:05:27, skipping insertion in model container [2021-11-19 15:05:27,639 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:05:27" (1/1) ... [2021-11-19 15:05:27,648 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 15:05:27,749 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 15:05:28,336 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test5-3.i[33021,33034] [2021-11-19 15:05:28,622 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test5-3.i[49681,49694] [2021-11-19 15:05:28,652 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:05:28,668 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 15:05:28,688 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 15:05:28,733 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test5-3.i[33021,33034] [2021-11-19 15:05:28,878 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test5-3.i[49681,49694] [2021-11-19 15:05:28,894 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:05:28,900 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 15:05:28,952 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test5-3.i[33021,33034] [2021-11-19 15:05:29,056 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test5-3.i[49681,49694] [2021-11-19 15:05:29,068 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:05:29,142 INFO L208 MainTranslator]: Completed translation [2021-11-19 15:05:29,142 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:05:29 WrapperNode [2021-11-19 15:05:29,143 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 15:05:29,144 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 15:05:29,145 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 15:05:29,145 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 15:05:29,154 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:05:29" (1/1) ... [2021-11-19 15:05:29,210 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:05:29" (1/1) ... [2021-11-19 15:05:29,330 INFO L137 Inliner]: procedures = 180, calls = 487, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1694 [2021-11-19 15:05:29,330 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 15:05:29,332 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 15:05:29,332 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 15:05:29,333 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 15:05:29,344 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:05:29" (1/1) ... [2021-11-19 15:05:29,345 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:05:29" (1/1) ... [2021-11-19 15:05:29,377 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:05:29" (1/1) ... [2021-11-19 15:05:29,382 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:05:29" (1/1) ... [2021-11-19 15:05:29,495 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:05:29" (1/1) ... [2021-11-19 15:05:29,525 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:05:29" (1/1) ... [2021-11-19 15:05:29,549 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:05:29" (1/1) ... [2021-11-19 15:05:29,569 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 15:05:29,571 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 15:05:29,571 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 15:05:29,571 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 15:05:29,572 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:05:29" (1/1) ... [2021-11-19 15:05:29,581 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 15:05:29,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:05:29,658 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 15:05:29,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 15:05:29,720 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-19 15:05:29,720 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-19 15:05:29,720 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-19 15:05:29,721 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-19 15:05:29,721 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-19 15:05:29,721 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-19 15:05:29,721 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-19 15:05:29,722 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 15:05:29,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-19 15:05:29,722 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 15:05:29,723 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-19 15:05:29,723 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-19 15:05:29,723 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 15:05:29,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-19 15:05:29,724 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 15:05:29,724 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 15:05:29,724 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 15:05:30,187 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 15:05:30,190 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 15:05:44,714 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 15:05:44,726 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 15:05:44,727 INFO L301 CfgBuilder]: Removed 100 assume(true) statements. [2021-11-19 15:05:44,730 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 03:05:44 BoogieIcfgContainer [2021-11-19 15:05:44,730 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 15:05:44,732 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 15:05:44,732 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 15:05:44,736 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 15:05:44,736 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 03:05:27" (1/3) ... [2021-11-19 15:05:44,737 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24fc913e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 03:05:44, skipping insertion in model container [2021-11-19 15:05:44,738 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:05:29" (2/3) ... [2021-11-19 15:05:44,738 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24fc913e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 03:05:44, skipping insertion in model container [2021-11-19 15:05:44,739 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 03:05:44" (3/3) ... [2021-11-19 15:05:44,740 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_BER_test5-3.i [2021-11-19 15:05:44,747 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 15:05:44,747 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-19 15:05:44,807 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 15:05:44,815 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 15:05:44,815 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-19 15:05:44,844 INFO L276 IsEmpty]: Start isEmpty. Operand has 308 states, 292 states have (on average 1.702054794520548) internal successors, (497), 299 states have internal predecessors, (497), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-19 15:05:44,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-19 15:05:44,850 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:05:44,851 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:05:44,851 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:05:44,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:05:44,858 INFO L85 PathProgramCache]: Analyzing trace with hash 691392686, now seen corresponding path program 1 times [2021-11-19 15:05:44,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:05:44,872 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1055944460] [2021-11-19 15:05:44,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:05:44,874 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:05:44,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:05:44,878 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:05:44,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 15:05:45,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:05:45,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-19 15:05:45,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:05:45,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:05:45,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:05:45,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:05:45,297 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:05:45,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1055944460] [2021-11-19 15:05:45,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1055944460] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:05:45,299 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:05:45,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-19 15:05:45,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935787558] [2021-11-19 15:05:45,302 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:05:45,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 15:05:45,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:05:45,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 15:05:45,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 15:05:45,357 INFO L87 Difference]: Start difference. First operand has 308 states, 292 states have (on average 1.702054794520548) internal successors, (497), 299 states have internal predecessors, (497), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:05:45,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:05:45,449 INFO L93 Difference]: Finished difference Result 614 states and 1041 transitions. [2021-11-19 15:05:45,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 15:05:45,452 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-19 15:05:45,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:05:45,479 INFO L225 Difference]: With dead ends: 614 [2021-11-19 15:05:45,479 INFO L226 Difference]: Without dead ends: 254 [2021-11-19 15:05:45,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 15:05:45,489 INFO L933 BasicCegarLoop]: 410 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 15:05:45,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 15:05:45,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-11-19 15:05:45,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 254. [2021-11-19 15:05:45,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 239 states have (on average 1.3179916317991631) internal successors, (315), 245 states have internal predecessors, (315), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-19 15:05:45,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 337 transitions. [2021-11-19 15:05:45,604 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 337 transitions. Word has length 8 [2021-11-19 15:05:45,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:05:45,604 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 337 transitions. [2021-11-19 15:05:45,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:05:45,605 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 337 transitions. [2021-11-19 15:05:45,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-19 15:05:45,608 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:05:45,608 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:05:45,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 15:05:45,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:05:45,824 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:05:45,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:05:45,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1622673081, now seen corresponding path program 1 times [2021-11-19 15:05:45,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:05:45,827 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1829225179] [2021-11-19 15:05:45,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:05:45,828 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:05:45,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:05:45,830 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:05:45,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 15:05:46,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:05:46,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 15:05:46,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:05:46,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:05:46,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:05:46,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:05:46,518 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:05:46,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1829225179] [2021-11-19 15:05:46,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1829225179] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:05:46,523 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:05:46,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 15:05:46,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246313291] [2021-11-19 15:05:46,524 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:05:46,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 15:05:46,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:05:46,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 15:05:46,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 15:05:46,527 INFO L87 Difference]: Start difference. First operand 254 states and 337 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:05:47,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:05:47,077 INFO L93 Difference]: Finished difference Result 575 states and 771 transitions. [2021-11-19 15:05:47,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 15:05:47,078 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-19 15:05:47,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:05:47,085 INFO L225 Difference]: With dead ends: 575 [2021-11-19 15:05:47,085 INFO L226 Difference]: Without dead ends: 497 [2021-11-19 15:05:47,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 15:05:47,089 INFO L933 BasicCegarLoop]: 372 mSDtfsCounter, 871 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 893 SdHoareTripleChecker+Valid, 690 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 15:05:47,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [893 Valid, 690 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 15:05:47,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2021-11-19 15:05:47,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 425. [2021-11-19 15:05:47,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 404 states have (on average 1.306930693069307) internal successors, (528), 410 states have internal predecessors, (528), 17 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (17), 13 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-19 15:05:47,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 562 transitions. [2021-11-19 15:05:47,145 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 562 transitions. Word has length 42 [2021-11-19 15:05:47,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:05:47,146 INFO L470 AbstractCegarLoop]: Abstraction has 425 states and 562 transitions. [2021-11-19 15:05:47,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:05:47,146 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 562 transitions. [2021-11-19 15:05:47,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-11-19 15:05:47,166 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:05:47,167 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:05:47,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 15:05:47,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:05:47,390 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:05:47,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:05:47,391 INFO L85 PathProgramCache]: Analyzing trace with hash 627365017, now seen corresponding path program 1 times [2021-11-19 15:05:47,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:05:47,395 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1880128560] [2021-11-19 15:05:47,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:05:47,396 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:05:47,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:05:47,399 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:05:47,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 15:05:48,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:05:48,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 15:05:48,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:05:48,999 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-19 15:05:49,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:05:49,822 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-19 15:05:49,823 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:05:49,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1880128560] [2021-11-19 15:05:49,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1880128560] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:05:49,823 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:05:49,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-19 15:05:49,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121577516] [2021-11-19 15:05:49,824 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:05:49,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 15:05:49,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:05:49,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 15:05:49,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 15:05:49,827 INFO L87 Difference]: Start difference. First operand 425 states and 562 transitions. Second operand has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:05:49,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:05:49,986 INFO L93 Difference]: Finished difference Result 850 states and 1130 transitions. [2021-11-19 15:05:49,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 15:05:49,987 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 238 [2021-11-19 15:05:49,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:05:49,990 INFO L225 Difference]: With dead ends: 850 [2021-11-19 15:05:49,990 INFO L226 Difference]: Without dead ends: 433 [2021-11-19 15:05:49,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 471 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 15:05:49,993 INFO L933 BasicCegarLoop]: 314 mSDtfsCounter, 291 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:05:49,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 669 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:05:49,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-11-19 15:05:50,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 431. [2021-11-19 15:05:50,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 410 states have (on average 1.2634146341463415) internal successors, (518), 416 states have internal predecessors, (518), 17 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (17), 13 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-19 15:05:50,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 552 transitions. [2021-11-19 15:05:50,029 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 552 transitions. Word has length 238 [2021-11-19 15:05:50,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:05:50,030 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 552 transitions. [2021-11-19 15:05:50,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:05:50,030 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 552 transitions. [2021-11-19 15:05:50,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-11-19 15:05:50,035 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:05:50,036 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:05:50,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 15:05:50,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:05:50,259 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:05:50,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:05:50,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1137440641, now seen corresponding path program 1 times [2021-11-19 15:05:50,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:05:50,262 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1976351626] [2021-11-19 15:05:50,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:05:50,263 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:05:50,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:05:50,264 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:05:50,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 15:05:51,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:05:51,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 15:05:51,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:05:52,065 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-19 15:05:52,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:05:53,021 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-19 15:05:53,022 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:05:53,022 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1976351626] [2021-11-19 15:05:53,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1976351626] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:05:53,023 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:05:53,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-19 15:05:53,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668431873] [2021-11-19 15:05:53,024 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:05:53,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 15:05:53,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:05:53,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 15:05:53,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 15:05:53,027 INFO L87 Difference]: Start difference. First operand 431 states and 552 transitions. Second operand has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:05:53,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:05:53,319 INFO L93 Difference]: Finished difference Result 807 states and 1042 transitions. [2021-11-19 15:05:53,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 15:05:53,331 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 238 [2021-11-19 15:05:53,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:05:53,335 INFO L225 Difference]: With dead ends: 807 [2021-11-19 15:05:53,336 INFO L226 Difference]: Without dead ends: 429 [2021-11-19 15:05:53,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 473 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 15:05:53,338 INFO L933 BasicCegarLoop]: 325 mSDtfsCounter, 11 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 15:05:53,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 635 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 15:05:53,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-11-19 15:05:53,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 429. [2021-11-19 15:05:53,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 408 states have (on average 1.2622549019607843) internal successors, (515), 414 states have internal predecessors, (515), 17 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (17), 13 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-19 15:05:53,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 549 transitions. [2021-11-19 15:05:53,367 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 549 transitions. Word has length 238 [2021-11-19 15:05:53,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:05:53,368 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 549 transitions. [2021-11-19 15:05:53,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:05:53,369 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 549 transitions. [2021-11-19 15:05:53,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2021-11-19 15:05:53,373 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:05:53,374 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:05:53,407 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-19 15:05:53,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:05:53,600 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:05:53,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:05:53,601 INFO L85 PathProgramCache]: Analyzing trace with hash 733455842, now seen corresponding path program 1 times [2021-11-19 15:05:53,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:05:53,604 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [141447924] [2021-11-19 15:05:53,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:05:53,604 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:05:53,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:05:53,605 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:05:53,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 15:05:54,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:05:54,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 15:05:54,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:05:55,046 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-11-19 15:05:55,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:05:55,805 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 37 proven. 3 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-19 15:05:55,805 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:05:55,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [141447924] [2021-11-19 15:05:55,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [141447924] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:05:55,806 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:05:55,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 15:05:55,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898608248] [2021-11-19 15:05:55,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:05:55,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 15:05:55,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:05:55,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 15:05:55,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 15:05:55,809 INFO L87 Difference]: Start difference. First operand 429 states and 549 transitions. Second operand has 4 states, 4 states have (on average 47.25) internal successors, (189), 4 states have internal predecessors, (189), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 15:05:55,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:05:55,911 INFO L93 Difference]: Finished difference Result 814 states and 1061 transitions. [2021-11-19 15:05:55,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 15:05:55,912 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 47.25) internal successors, (189), 4 states have internal predecessors, (189), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 253 [2021-11-19 15:05:55,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:05:55,917 INFO L225 Difference]: With dead ends: 814 [2021-11-19 15:05:55,917 INFO L226 Difference]: Without dead ends: 432 [2021-11-19 15:05:55,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 500 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 15:05:55,921 INFO L933 BasicCegarLoop]: 322 mSDtfsCounter, 2 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 959 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:05:55,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 959 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:05:55,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-11-19 15:05:55,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 432. [2021-11-19 15:05:55,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 410 states have (on average 1.2634146341463415) internal successors, (518), 417 states have internal predecessors, (518), 17 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (21), 13 states have call predecessors, (21), 17 states have call successors, (21) [2021-11-19 15:05:55,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 556 transitions. [2021-11-19 15:05:55,956 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 556 transitions. Word has length 253 [2021-11-19 15:05:55,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:05:55,957 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 556 transitions. [2021-11-19 15:05:55,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.25) internal successors, (189), 4 states have internal predecessors, (189), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 15:05:55,958 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 556 transitions. [2021-11-19 15:05:55,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2021-11-19 15:05:55,963 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:05:55,964 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:05:55,998 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 15:05:56,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:05:56,185 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:05:56,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:05:56,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1488672828, now seen corresponding path program 1 times [2021-11-19 15:05:56,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:05:56,188 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [516519833] [2021-11-19 15:05:56,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:05:56,188 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:05:56,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:05:56,190 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:05:56,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 15:05:56,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:05:57,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 15:05:57,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:05:57,677 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 44 proven. 1 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-19 15:05:57,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:05:58,473 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 37 proven. 7 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-19 15:05:58,473 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:05:58,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [516519833] [2021-11-19 15:05:58,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [516519833] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:05:58,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1777711715] [2021-11-19 15:05:58,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:05:58,474 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:05:58,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:05:58,478 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:05:58,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-19 15:05:59,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:05:59,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 15:05:59,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:05:59,956 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-19 15:05:59,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:06:00,927 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-19 15:06:00,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1777711715] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:06:00,930 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 15:06:00,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 6] imperfect sequences [5, 5] total 14 [2021-11-19 15:06:00,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113323331] [2021-11-19 15:06:00,931 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:06:00,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 15:06:00,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:06:00,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 15:06:00,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-11-19 15:06:00,934 INFO L87 Difference]: Start difference. First operand 432 states and 556 transitions. Second operand has 8 states, 8 states have (on average 30.5) internal successors, (244), 8 states have internal predecessors, (244), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 15:06:01,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:06:01,221 INFO L93 Difference]: Finished difference Result 792 states and 1033 transitions. [2021-11-19 15:06:01,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 15:06:01,222 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 30.5) internal successors, (244), 8 states have internal predecessors, (244), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 255 [2021-11-19 15:06:01,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:06:01,228 INFO L225 Difference]: With dead ends: 792 [2021-11-19 15:06:01,228 INFO L226 Difference]: Without dead ends: 452 [2021-11-19 15:06:01,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1016 GetRequests, 1004 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-11-19 15:06:01,233 INFO L933 BasicCegarLoop]: 399 mSDtfsCounter, 548 mSDsluCounter, 885 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 559 SdHoareTripleChecker+Valid, 1284 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 15:06:01,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [559 Valid, 1284 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 15:06:01,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-11-19 15:06:01,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 450. [2021-11-19 15:06:01,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 428 states have (on average 1.2289719626168225) internal successors, (526), 435 states have internal predecessors, (526), 17 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (21), 13 states have call predecessors, (21), 17 states have call successors, (21) [2021-11-19 15:06:01,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 564 transitions. [2021-11-19 15:06:01,270 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 564 transitions. Word has length 255 [2021-11-19 15:06:01,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:06:01,271 INFO L470 AbstractCegarLoop]: Abstraction has 450 states and 564 transitions. [2021-11-19 15:06:01,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 30.5) internal successors, (244), 8 states have internal predecessors, (244), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 15:06:01,271 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 564 transitions. [2021-11-19 15:06:01,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2021-11-19 15:06:01,282 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:06:01,283 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:06:01,290 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (8)] Ended with exit code 0 [2021-11-19 15:06:01,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 15:06:01,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:06:01,691 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:06:01,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:06:01,692 INFO L85 PathProgramCache]: Analyzing trace with hash -301049792, now seen corresponding path program 1 times [2021-11-19 15:06:01,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:06:01,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1615306859] [2021-11-19 15:06:01,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:06:01,694 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:06:01,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:06:01,695 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:06:01,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 15:06:02,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:06:02,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 15:06:02,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:06:03,003 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 44 proven. 1 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-19 15:06:03,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:06:03,766 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 37 proven. 7 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-19 15:06:03,766 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:06:03,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1615306859] [2021-11-19 15:06:03,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1615306859] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:06:03,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [883339356] [2021-11-19 15:06:03,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:06:03,767 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:06:03,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:06:03,775 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:06:03,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-19 15:06:04,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:06:04,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 15:06:04,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:06:05,251 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-19 15:06:05,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:06:06,011 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-19 15:06:06,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [883339356] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:06:06,011 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 15:06:06,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-19 15:06:06,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701205777] [2021-11-19 15:06:06,012 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:06:06,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 15:06:06,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:06:06,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 15:06:06,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-19 15:06:06,014 INFO L87 Difference]: Start difference. First operand 450 states and 564 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 15:06:07,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:06:07,245 INFO L93 Difference]: Finished difference Result 982 states and 1246 transitions. [2021-11-19 15:06:07,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 15:06:07,246 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 255 [2021-11-19 15:06:07,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:06:07,252 INFO L225 Difference]: With dead ends: 982 [2021-11-19 15:06:07,253 INFO L226 Difference]: Without dead ends: 715 [2021-11-19 15:06:07,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1016 GetRequests, 1009 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-19 15:06:07,255 INFO L933 BasicCegarLoop]: 424 mSDtfsCounter, 225 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 712 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-19 15:06:07,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 712 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-19 15:06:07,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2021-11-19 15:06:07,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 713. [2021-11-19 15:06:07,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 681 states have (on average 1.2378854625550662) internal successors, (843), 693 states have internal predecessors, (843), 27 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (34), 19 states have call predecessors, (34), 27 states have call successors, (34) [2021-11-19 15:06:07,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 904 transitions. [2021-11-19 15:06:07,296 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 904 transitions. Word has length 255 [2021-11-19 15:06:07,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:06:07,297 INFO L470 AbstractCegarLoop]: Abstraction has 713 states and 904 transitions. [2021-11-19 15:06:07,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 15:06:07,298 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 904 transitions. [2021-11-19 15:06:07,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2021-11-19 15:06:07,304 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:06:07,305 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:06:07,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-19 15:06:07,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 15:06:07,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:06:07,712 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:06:07,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:06:07,712 INFO L85 PathProgramCache]: Analyzing trace with hash -627607892, now seen corresponding path program 1 times [2021-11-19 15:06:07,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:06:07,714 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [280568130] [2021-11-19 15:06:07,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:06:07,714 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:06:07,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:06:07,715 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:06:07,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 15:06:08,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:06:08,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 595 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 15:06:08,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:06:09,127 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 44 proven. 1 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-19 15:06:09,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:06:09,788 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 37 proven. 7 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-19 15:06:09,788 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:06:09,788 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [280568130] [2021-11-19 15:06:09,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [280568130] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:06:09,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [223662493] [2021-11-19 15:06:09,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:06:09,789 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:06:09,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:06:09,790 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:06:09,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-19 15:06:10,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:06:10,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 595 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 15:06:10,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:06:12,534 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-11-19 15:06:12,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:06:14,693 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-11-19 15:06:14,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [223662493] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:06:14,694 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 15:06:14,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-19 15:06:14,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365199647] [2021-11-19 15:06:14,694 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:06:14,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 15:06:14,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:06:14,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 15:06:14,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-19 15:06:14,696 INFO L87 Difference]: Start difference. First operand 713 states and 904 transitions. Second operand has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 15:06:15,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:06:15,600 INFO L93 Difference]: Finished difference Result 1010 states and 1281 transitions. [2021-11-19 15:06:15,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 15:06:15,601 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 262 [2021-11-19 15:06:15,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:06:15,605 INFO L225 Difference]: With dead ends: 1010 [2021-11-19 15:06:15,605 INFO L226 Difference]: Without dead ends: 712 [2021-11-19 15:06:15,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1044 GetRequests, 1037 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-19 15:06:15,608 INFO L933 BasicCegarLoop]: 396 mSDtfsCounter, 85 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 697 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 15:06:15,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 697 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 15:06:15,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states. [2021-11-19 15:06:15,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 710. [2021-11-19 15:06:15,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 710 states, 679 states have (on average 1.2385861561119293) internal successors, (841), 691 states have internal predecessors, (841), 26 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (32), 18 states have call predecessors, (32), 26 states have call successors, (32) [2021-11-19 15:06:15,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 899 transitions. [2021-11-19 15:06:15,652 INFO L78 Accepts]: Start accepts. Automaton has 710 states and 899 transitions. Word has length 262 [2021-11-19 15:06:15,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:06:15,656 INFO L470 AbstractCegarLoop]: Abstraction has 710 states and 899 transitions. [2021-11-19 15:06:15,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 15:06:15,657 INFO L276 IsEmpty]: Start isEmpty. Operand 710 states and 899 transitions. [2021-11-19 15:06:15,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2021-11-19 15:06:15,664 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:06:15,664 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:06:15,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 15:06:15,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-11-19 15:06:16,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 15:06:16,087 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:06:16,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:06:16,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1990050795, now seen corresponding path program 1 times [2021-11-19 15:06:16,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:06:16,090 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [39953321] [2021-11-19 15:06:16,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:06:16,090 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:06:16,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:06:16,091 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:06:16,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 15:06:16,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:06:16,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 674 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 15:06:16,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:06:17,613 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 58 proven. 1 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-19 15:06:17,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:06:18,338 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 37 proven. 19 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-19 15:06:18,338 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:06:18,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [39953321] [2021-11-19 15:06:18,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [39953321] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:06:18,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [267186179] [2021-11-19 15:06:18,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:06:18,339 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:06:18,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:06:18,340 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:06:18,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-19 15:06:18,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:06:18,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 674 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 15:06:18,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:06:19,501 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2021-11-19 15:06:19,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:06:20,267 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2021-11-19 15:06:20,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [267186179] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:06:20,268 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 15:06:20,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 7] imperfect sequences [5, 5] total 13 [2021-11-19 15:06:20,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402555899] [2021-11-19 15:06:20,269 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:06:20,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 15:06:20,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:06:20,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 15:06:20,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-11-19 15:06:20,271 INFO L87 Difference]: Start difference. First operand 710 states and 899 transitions. Second operand has 7 states, 7 states have (on average 25.142857142857142) internal successors, (176), 7 states have internal predecessors, (176), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 15:06:20,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:06:20,577 INFO L93 Difference]: Finished difference Result 928 states and 1207 transitions. [2021-11-19 15:06:20,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 15:06:20,579 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.142857142857142) internal successors, (176), 7 states have internal predecessors, (176), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 279 [2021-11-19 15:06:20,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:06:20,586 INFO L225 Difference]: With dead ends: 928 [2021-11-19 15:06:20,587 INFO L226 Difference]: Without dead ends: 773 [2021-11-19 15:06:20,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1112 GetRequests, 1101 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-11-19 15:06:20,589 INFO L933 BasicCegarLoop]: 298 mSDtfsCounter, 13 mSDsluCounter, 1120 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 1418 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 15:06:20,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 1418 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 15:06:20,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 773 states. [2021-11-19 15:06:20,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 773 to 770. [2021-11-19 15:06:20,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 770 states, 739 states have (on average 1.219215155615697) internal successors, (901), 751 states have internal predecessors, (901), 26 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (32), 18 states have call predecessors, (32), 26 states have call successors, (32) [2021-11-19 15:06:20,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 959 transitions. [2021-11-19 15:06:20,628 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 959 transitions. Word has length 279 [2021-11-19 15:06:20,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:06:20,629 INFO L470 AbstractCegarLoop]: Abstraction has 770 states and 959 transitions. [2021-11-19 15:06:20,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.142857142857142) internal successors, (176), 7 states have internal predecessors, (176), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 15:06:20,630 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 959 transitions. [2021-11-19 15:06:20,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2021-11-19 15:06:20,636 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:06:20,637 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:06:20,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-19 15:06:20,882 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-19 15:06:21,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:06:21,062 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:06:21,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:06:21,062 INFO L85 PathProgramCache]: Analyzing trace with hash 603847401, now seen corresponding path program 1 times [2021-11-19 15:06:21,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:06:21,064 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [291909815] [2021-11-19 15:06:21,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:06:21,064 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:06:21,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:06:21,065 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:06:21,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-19 15:06:21,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:06:21,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 675 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 15:06:21,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:06:22,492 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 58 proven. 1 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-19 15:06:22,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:06:23,197 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 37 proven. 19 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-19 15:06:23,197 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:06:23,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [291909815] [2021-11-19 15:06:23,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [291909815] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:06:23,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [573098364] [2021-11-19 15:06:23,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:06:23,198 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:06:23,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:06:23,200 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:06:23,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-19 15:06:23,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:06:23,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 675 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 15:06:23,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:06:24,559 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-19 15:06:24,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:06:25,182 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-19 15:06:25,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [573098364] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:06:25,182 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 15:06:25,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 13 [2021-11-19 15:06:25,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124694757] [2021-11-19 15:06:25,183 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:06:25,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 15:06:25,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:06:25,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 15:06:25,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-11-19 15:06:25,185 INFO L87 Difference]: Start difference. First operand 770 states and 959 transitions. Second operand has 7 states, 7 states have (on average 33.0) internal successors, (231), 7 states have internal predecessors, (231), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-19 15:06:25,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:06:25,401 INFO L93 Difference]: Finished difference Result 1397 states and 1749 transitions. [2021-11-19 15:06:25,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 15:06:25,402 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 33.0) internal successors, (231), 7 states have internal predecessors, (231), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 279 [2021-11-19 15:06:25,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:06:25,408 INFO L225 Difference]: With dead ends: 1397 [2021-11-19 15:06:25,408 INFO L226 Difference]: Without dead ends: 734 [2021-11-19 15:06:25,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1112 GetRequests, 1101 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-11-19 15:06:25,411 INFO L933 BasicCegarLoop]: 394 mSDtfsCounter, 531 mSDsluCounter, 885 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 542 SdHoareTripleChecker+Valid, 1279 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 15:06:25,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [542 Valid, 1279 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 15:06:25,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2021-11-19 15:06:25,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 734. [2021-11-19 15:06:25,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 703 states have (on average 1.2005689900426741) internal successors, (844), 715 states have internal predecessors, (844), 26 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (32), 18 states have call predecessors, (32), 26 states have call successors, (32) [2021-11-19 15:06:25,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 902 transitions. [2021-11-19 15:06:25,450 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 902 transitions. Word has length 279 [2021-11-19 15:06:25,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:06:25,451 INFO L470 AbstractCegarLoop]: Abstraction has 734 states and 902 transitions. [2021-11-19 15:06:25,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 33.0) internal successors, (231), 7 states have internal predecessors, (231), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-19 15:06:25,451 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 902 transitions. [2021-11-19 15:06:25,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2021-11-19 15:06:25,458 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:06:25,459 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:06:25,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-19 15:06:25,682 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (16)] Ended with exit code 0 [2021-11-19 15:06:25,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 15:06:25,879 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:06:25,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:06:25,879 INFO L85 PathProgramCache]: Analyzing trace with hash 874348137, now seen corresponding path program 1 times [2021-11-19 15:06:25,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:06:25,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1028413285] [2021-11-19 15:06:25,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:06:25,881 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:06:25,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:06:25,882 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:06:25,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-19 15:06:26,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:06:26,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 15:06:26,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:06:27,420 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 58 proven. 1 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-19 15:06:27,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:06:28,106 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 37 proven. 19 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-19 15:06:28,106 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:06:28,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1028413285] [2021-11-19 15:06:28,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1028413285] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:06:28,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [679784020] [2021-11-19 15:06:28,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:06:28,107 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:06:28,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:06:28,111 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:06:28,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-19 15:06:28,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:06:28,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 15:06:28,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:06:29,251 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2021-11-19 15:06:29,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:06:29,678 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2021-11-19 15:06:29,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [679784020] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:06:29,679 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 15:06:29,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 11 [2021-11-19 15:06:29,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045753008] [2021-11-19 15:06:29,680 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:06:29,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 15:06:29,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:06:29,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 15:06:29,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-19 15:06:29,682 INFO L87 Difference]: Start difference. First operand 734 states and 902 transitions. Second operand has 5 states, 5 states have (on average 34.0) internal successors, (170), 5 states have internal predecessors, (170), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 15:06:29,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:06:29,833 INFO L93 Difference]: Finished difference Result 913 states and 1144 transitions. [2021-11-19 15:06:29,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 15:06:29,834 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 34.0) internal successors, (170), 5 states have internal predecessors, (170), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 279 [2021-11-19 15:06:29,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:06:29,839 INFO L225 Difference]: With dead ends: 913 [2021-11-19 15:06:29,840 INFO L226 Difference]: Without dead ends: 690 [2021-11-19 15:06:29,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1113 GetRequests, 1103 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-19 15:06:29,842 INFO L933 BasicCegarLoop]: 283 mSDtfsCounter, 80 mSDsluCounter, 711 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 994 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:06:29,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 994 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:06:29,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2021-11-19 15:06:29,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 683. [2021-11-19 15:06:29,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 652 states have (on average 1.165644171779141) internal successors, (760), 664 states have internal predecessors, (760), 26 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (32), 18 states have call predecessors, (32), 26 states have call successors, (32) [2021-11-19 15:06:29,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 818 transitions. [2021-11-19 15:06:29,876 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 818 transitions. Word has length 279 [2021-11-19 15:06:29,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:06:29,877 INFO L470 AbstractCegarLoop]: Abstraction has 683 states and 818 transitions. [2021-11-19 15:06:29,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 34.0) internal successors, (170), 5 states have internal predecessors, (170), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 15:06:29,878 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 818 transitions. [2021-11-19 15:06:29,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2021-11-19 15:06:29,881 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:06:29,882 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:06:29,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-19 15:06:30,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-19 15:06:30,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 15:06:30,307 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:06:30,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:06:30,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1511815561, now seen corresponding path program 1 times [2021-11-19 15:06:30,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:06:30,309 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1887559637] [2021-11-19 15:06:30,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:06:30,309 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:06:30,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:06:30,311 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:06:30,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-19 15:06:31,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:06:31,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 656 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 15:06:31,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:06:31,904 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 58 proven. 1 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-19 15:06:31,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:06:32,548 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 37 proven. 19 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-19 15:06:32,549 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:06:32,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1887559637] [2021-11-19 15:06:32,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1887559637] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:06:32,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1952706870] [2021-11-19 15:06:32,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:06:32,549 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:06:32,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:06:32,550 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:06:32,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-19 15:06:33,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:06:33,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 656 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 15:06:33,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:06:34,306 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 58 proven. 1 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-19 15:06:34,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:06:34,939 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 37 proven. 19 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-19 15:06:34,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1952706870] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:06:34,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671923872] [2021-11-19 15:06:34,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:06:34,940 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 15:06:34,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:06:34,942 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 15:06:34,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-19 15:06:35,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:06:35,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 656 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 15:06:35,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:06:36,460 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-19 15:06:36,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:06:37,571 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-19 15:06:37,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671923872] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:06:37,571 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 15:06:37,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 14 [2021-11-19 15:06:37,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740879703] [2021-11-19 15:06:37,572 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 15:06:37,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 15:06:37,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:06:37,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 15:06:37,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-11-19 15:06:37,576 INFO L87 Difference]: Start difference. First operand 683 states and 818 transitions. Second operand has 14 states, 14 states have (on average 45.0) internal successors, (630), 14 states have internal predecessors, (630), 4 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-19 15:06:40,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:06:40,847 INFO L93 Difference]: Finished difference Result 2877 states and 3565 transitions. [2021-11-19 15:06:40,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-19 15:06:40,849 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 45.0) internal successors, (630), 14 states have internal predecessors, (630), 4 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) Word has length 279 [2021-11-19 15:06:40,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:06:40,866 INFO L225 Difference]: With dead ends: 2877 [2021-11-19 15:06:40,866 INFO L226 Difference]: Without dead ends: 2241 [2021-11-19 15:06:40,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1677 GetRequests, 1658 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-11-19 15:06:40,870 INFO L933 BasicCegarLoop]: 799 mSDtfsCounter, 2267 mSDsluCounter, 4547 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2318 SdHoareTripleChecker+Valid, 5346 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-19 15:06:40,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2318 Valid, 5346 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-11-19 15:06:40,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2241 states. [2021-11-19 15:06:40,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2241 to 1887. [2021-11-19 15:06:40,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1887 states, 1818 states have (on average 1.174917491749175) internal successors, (2136), 1830 states have internal predecessors, (2136), 63 states have call successors, (63), 3 states have call predecessors, (63), 4 states have return successors, (84), 55 states have call predecessors, (84), 63 states have call successors, (84) [2021-11-19 15:06:40,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1887 states to 1887 states and 2283 transitions. [2021-11-19 15:06:40,975 INFO L78 Accepts]: Start accepts. Automaton has 1887 states and 2283 transitions. Word has length 279 [2021-11-19 15:06:40,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:06:40,975 INFO L470 AbstractCegarLoop]: Abstraction has 1887 states and 2283 transitions. [2021-11-19 15:06:40,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 45.0) internal successors, (630), 14 states have internal predecessors, (630), 4 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-19 15:06:40,976 INFO L276 IsEmpty]: Start isEmpty. Operand 1887 states and 2283 transitions. [2021-11-19 15:06:41,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 680 [2021-11-19 15:06:41,010 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:06:41,011 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:06:41,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-19 15:06:41,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-19 15:06:41,433 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (20)] Ended with exit code 0 [2021-11-19 15:06:41,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 15:06:41,627 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:06:41,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:06:41,628 INFO L85 PathProgramCache]: Analyzing trace with hash -889533929, now seen corresponding path program 2 times [2021-11-19 15:06:41,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:06:41,631 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [148954706] [2021-11-19 15:06:41,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 15:06:41,631 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:06:41,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:06:41,633 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:06:41,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-19 15:06:43,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 15:06:43,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 15:06:43,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 1496 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 15:06:43,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:06:45,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 245 proven. 10 refuted. 0 times theorem prover too weak. 1339 trivial. 0 not checked. [2021-11-19 15:06:45,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:06:47,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 181 proven. 71 refuted. 0 times theorem prover too weak. 1342 trivial. 0 not checked. [2021-11-19 15:06:47,019 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:06:47,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [148954706] [2021-11-19 15:06:47,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [148954706] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:06:47,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1629039937] [2021-11-19 15:06:47,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 15:06:47,020 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:06:47,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:06:47,022 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:06:47,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-19 15:06:50,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 15:06:50,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 15:06:50,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 1496 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 15:06:50,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:06:51,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 245 proven. 10 refuted. 0 times theorem prover too weak. 1339 trivial. 0 not checked. [2021-11-19 15:06:51,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:06:53,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 181 proven. 71 refuted. 0 times theorem prover too weak. 1342 trivial. 0 not checked. [2021-11-19 15:06:53,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1629039937] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:06:53,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157667441] [2021-11-19 15:06:53,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 15:06:53,571 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 15:06:53,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:06:53,577 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 15:06:53,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-19 15:06:54,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 15:06:54,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 15:06:55,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 1496 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 15:06:55,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:06:56,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 274 proven. 3 refuted. 0 times theorem prover too weak. 1317 trivial. 0 not checked. [2021-11-19 15:06:56,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:06:58,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 198 proven. 31 refuted. 0 times theorem prover too weak. 1365 trivial. 0 not checked. [2021-11-19 15:06:58,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157667441] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:06:58,295 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 15:06:58,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 6, 6] total 20 [2021-11-19 15:06:58,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908974438] [2021-11-19 15:06:58,297 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 15:06:58,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 15:06:58,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:06:58,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 15:06:58,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2021-11-19 15:06:58,300 INFO L87 Difference]: Start difference. First operand 1887 states and 2283 transitions. Second operand has 20 states, 20 states have (on average 11.5) internal successors, (230), 20 states have internal predecessors, (230), 2 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 15:07:00,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:07:00,055 INFO L93 Difference]: Finished difference Result 3753 states and 4746 transitions. [2021-11-19 15:07:00,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-19 15:07:00,056 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 11.5) internal successors, (230), 20 states have internal predecessors, (230), 2 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 679 [2021-11-19 15:07:00,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:07:00,071 INFO L225 Difference]: With dead ends: 3753 [2021-11-19 15:07:00,071 INFO L226 Difference]: Without dead ends: 1907 [2021-11-19 15:07:00,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4093 GetRequests, 4050 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=554, Invalid=1426, Unknown=0, NotChecked=0, Total=1980 [2021-11-19 15:07:00,080 INFO L933 BasicCegarLoop]: 297 mSDtfsCounter, 155 mSDsluCounter, 3172 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 3469 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 15:07:00,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 3469 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 15:07:00,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1907 states. [2021-11-19 15:07:00,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1907 to 1899. [2021-11-19 15:07:00,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1899 states, 1830 states have (on average 1.1759562841530056) internal successors, (2152), 1842 states have internal predecessors, (2152), 63 states have call successors, (63), 3 states have call predecessors, (63), 4 states have return successors, (84), 55 states have call predecessors, (84), 63 states have call successors, (84) [2021-11-19 15:07:00,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1899 states to 1899 states and 2299 transitions. [2021-11-19 15:07:00,186 INFO L78 Accepts]: Start accepts. Automaton has 1899 states and 2299 transitions. Word has length 679 [2021-11-19 15:07:00,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:07:00,187 INFO L470 AbstractCegarLoop]: Abstraction has 1899 states and 2299 transitions. [2021-11-19 15:07:00,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 11.5) internal successors, (230), 20 states have internal predecessors, (230), 2 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 15:07:00,187 INFO L276 IsEmpty]: Start isEmpty. Operand 1899 states and 2299 transitions. [2021-11-19 15:07:00,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 704 [2021-11-19 15:07:00,223 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:07:00,224 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:07:00,290 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-19 15:07:00,541 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-19 15:07:00,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-19 15:07:00,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 15:07:00,834 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:07:00,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:07:00,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1901317097, now seen corresponding path program 3 times [2021-11-19 15:07:00,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:07:00,839 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [203014285] [2021-11-19 15:07:00,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 15:07:00,839 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:07:00,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:07:00,840 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:07:00,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050f1aad-6dbe-4236-ad80-5ebb9a90b758/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process