./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-lopstr16/base_case.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a544f069-b0b0-4370-9963-ff673d2ecb84/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a544f069-b0b0-4370-9963-ff673d2ecb84/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a544f069-b0b0-4370-9963-ff673d2ecb84/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a544f069-b0b0-4370-9963-ff673d2ecb84/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-lopstr16/base_case.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a544f069-b0b0-4370-9963-ff673d2ecb84/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a544f069-b0b0-4370-9963-ff673d2ecb84/bin/utaipan-UUZaoUuFF8 --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 f9dd43881ccf56b8e6da6d28cc61ed7f891fae597b16e121f5ac65378400d596 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:45:21,915 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:45:21,919 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:45:21,981 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:45:21,982 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:45:21,987 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:45:21,989 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:45:21,994 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:45:21,997 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:45:22,003 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:45:22,005 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:45:22,007 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:45:22,008 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:45:22,011 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:45:22,013 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:45:22,018 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:45:22,020 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:45:22,022 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:45:22,024 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:45:22,033 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:45:22,035 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:45:22,037 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:45:22,040 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:45:22,042 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:45:22,051 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:45:22,052 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:45:22,052 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:45:22,054 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:45:22,055 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:45:22,056 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:45:22,057 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:45:22,058 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:45:22,060 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:45:22,061 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:45:22,063 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:45:22,063 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:45:22,064 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:45:22,064 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:45:22,065 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:45:22,066 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:45:22,066 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:45:22,067 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a544f069-b0b0-4370-9963-ff673d2ecb84/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:45:22,096 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:45:22,096 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:45:22,097 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:45:22,097 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:45:22,098 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:45:22,098 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:45:22,098 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:45:22,098 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:45:22,099 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:45:22,099 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:45:22,099 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:45:22,099 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:45:22,100 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:45:22,100 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:45:22,100 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:45:22,101 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:45:22,101 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:45:22,102 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:45:22,102 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:45:22,102 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:45:22,102 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:45:22,103 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:45:22,103 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:45:22,103 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:45:22,103 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:45:22,104 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:45:22,104 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:45:22,104 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:45:22,104 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:45:22,105 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:45:22,105 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:45:22,105 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:45:22,105 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:45:22,106 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:45:22,106 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:45:22,106 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:45:22,106 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:45:22,107 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:45:22,107 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:45:22,107 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_a544f069-b0b0-4370-9963-ff673d2ecb84/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a544f069-b0b0-4370-9963-ff673d2ecb84/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f9dd43881ccf56b8e6da6d28cc61ed7f891fae597b16e121f5ac65378400d596 [2021-11-07 01:45:22,362 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:45:22,382 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:45:22,385 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:45:22,386 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:45:22,387 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:45:22,388 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a544f069-b0b0-4370-9963-ff673d2ecb84/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/array-lopstr16/base_case.i [2021-11-07 01:45:22,475 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a544f069-b0b0-4370-9963-ff673d2ecb84/bin/utaipan-UUZaoUuFF8/data/15055f8c5/e6a76686c26742b3a6299f92b5550c2a/FLAGd9894e4ad [2021-11-07 01:45:23,066 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:45:23,067 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a544f069-b0b0-4370-9963-ff673d2ecb84/sv-benchmarks/c/array-lopstr16/base_case.i [2021-11-07 01:45:23,080 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a544f069-b0b0-4370-9963-ff673d2ecb84/bin/utaipan-UUZaoUuFF8/data/15055f8c5/e6a76686c26742b3a6299f92b5550c2a/FLAGd9894e4ad [2021-11-07 01:45:23,387 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a544f069-b0b0-4370-9963-ff673d2ecb84/bin/utaipan-UUZaoUuFF8/data/15055f8c5/e6a76686c26742b3a6299f92b5550c2a [2021-11-07 01:45:23,390 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:45:23,392 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:45:23,394 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:45:23,394 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:45:23,398 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:45:23,398 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:45:23" (1/1) ... [2021-11-07 01:45:23,400 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@792e0727 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:45:23, skipping insertion in model container [2021-11-07 01:45:23,400 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:45:23" (1/1) ... [2021-11-07 01:45:23,408 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:45:23,426 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:45:23,636 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a544f069-b0b0-4370-9963-ff673d2ecb84/sv-benchmarks/c/array-lopstr16/base_case.i[802,815] [2021-11-07 01:45:23,667 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:45:23,679 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) [2021-11-07 01:45:23,680 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2b09fa7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:45:23, skipping insertion in model container [2021-11-07 01:45:23,680 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:45:23,681 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:45:23,683 INFO L168 Benchmark]: Toolchain (without parser) took 289.98 ms. Allocated memory is still 121.6 MB. Free memory was 82.9 MB in the beginning and 97.0 MB in the end (delta: -14.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-07 01:45:23,684 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 121.6 MB. Free memory was 99.4 MB in the beginning and 99.4 MB in the end (delta: 62.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:45:23,685 INFO L168 Benchmark]: CACSL2BoogieTranslator took 286.97 ms. Allocated memory is still 121.6 MB. Free memory was 82.8 MB in the beginning and 97.0 MB in the end (delta: -14.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-07 01:45:23,688 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 121.6 MB. Free memory was 99.4 MB in the beginning and 99.4 MB in the end (delta: 62.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 286.97 ms. Allocated memory is still 121.6 MB. Free memory was 82.8 MB in the beginning and 97.0 MB in the end (delta: -14.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 27]: 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_a544f069-b0b0-4370-9963-ff673d2ecb84/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a544f069-b0b0-4370-9963-ff673d2ecb84/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a544f069-b0b0-4370-9963-ff673d2ecb84/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a544f069-b0b0-4370-9963-ff673d2ecb84/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-lopstr16/base_case.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a544f069-b0b0-4370-9963-ff673d2ecb84/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a544f069-b0b0-4370-9963-ff673d2ecb84/bin/utaipan-UUZaoUuFF8 --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 f9dd43881ccf56b8e6da6d28cc61ed7f891fae597b16e121f5ac65378400d596 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:45:25,979 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:45:25,983 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:45:26,026 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:45:26,027 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:45:26,028 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:45:26,030 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:45:26,033 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:45:26,035 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:45:26,037 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:45:26,038 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:45:26,039 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:45:26,040 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:45:26,041 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:45:26,043 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:45:26,045 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:45:26,046 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:45:26,047 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:45:26,050 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:45:26,052 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:45:26,055 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:45:26,061 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:45:26,063 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:45:26,064 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:45:26,069 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:45:26,069 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:45:26,070 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:45:26,071 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:45:26,078 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:45:26,079 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:45:26,080 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:45:26,081 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:45:26,083 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:45:26,085 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:45:26,089 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:45:26,089 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:45:26,090 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:45:26,091 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:45:26,091 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:45:26,093 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:45:26,094 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:45:26,094 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a544f069-b0b0-4370-9963-ff673d2ecb84/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:45:26,146 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:45:26,147 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:45:26,148 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:45:26,149 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:45:26,150 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:45:26,150 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:45:26,150 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:45:26,150 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:45:26,150 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:45:26,151 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:45:26,151 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:45:26,151 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:45:26,152 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:45:26,152 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:45:26,152 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:45:26,152 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:45:26,152 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:45:26,153 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:45:26,153 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:45:26,153 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:45:26,153 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:45:26,153 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:45:26,154 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:45:26,154 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:45:26,154 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:45:26,154 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:45:26,154 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:45:26,155 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:45:26,155 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:45:26,155 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:45:26,155 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:45:26,155 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:45:26,156 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:45:26,156 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:45:26,156 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:45:26,156 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_a544f069-b0b0-4370-9963-ff673d2ecb84/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a544f069-b0b0-4370-9963-ff673d2ecb84/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f9dd43881ccf56b8e6da6d28cc61ed7f891fae597b16e121f5ac65378400d596 [2021-11-07 01:45:26,557 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:45:26,581 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:45:26,584 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:45:26,585 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:45:26,586 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:45:26,587 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a544f069-b0b0-4370-9963-ff673d2ecb84/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/array-lopstr16/base_case.i [2021-11-07 01:45:26,665 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a544f069-b0b0-4370-9963-ff673d2ecb84/bin/utaipan-UUZaoUuFF8/data/533f41a1f/e8c143e14f9e41c39b108844268d4676/FLAGbb4fd4748 [2021-11-07 01:45:27,281 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:45:27,282 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a544f069-b0b0-4370-9963-ff673d2ecb84/sv-benchmarks/c/array-lopstr16/base_case.i [2021-11-07 01:45:27,291 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a544f069-b0b0-4370-9963-ff673d2ecb84/bin/utaipan-UUZaoUuFF8/data/533f41a1f/e8c143e14f9e41c39b108844268d4676/FLAGbb4fd4748 [2021-11-07 01:45:27,634 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a544f069-b0b0-4370-9963-ff673d2ecb84/bin/utaipan-UUZaoUuFF8/data/533f41a1f/e8c143e14f9e41c39b108844268d4676 [2021-11-07 01:45:27,637 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:45:27,638 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:45:27,640 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:45:27,641 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:45:27,645 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:45:27,646 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:45:27" (1/1) ... [2021-11-07 01:45:27,647 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74f98831 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:45:27, skipping insertion in model container [2021-11-07 01:45:27,647 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:45:27" (1/1) ... [2021-11-07 01:45:27,656 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:45:27,672 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:45:27,823 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a544f069-b0b0-4370-9963-ff673d2ecb84/sv-benchmarks/c/array-lopstr16/base_case.i[802,815] [2021-11-07 01:45:27,853 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:45:27,875 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:45:27,882 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:45:27,897 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a544f069-b0b0-4370-9963-ff673d2ecb84/sv-benchmarks/c/array-lopstr16/base_case.i[802,815] [2021-11-07 01:45:27,905 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:45:27,912 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:45:27,948 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a544f069-b0b0-4370-9963-ff673d2ecb84/sv-benchmarks/c/array-lopstr16/base_case.i[802,815] [2021-11-07 01:45:27,955 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:45:28,002 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:45:28,002 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:45:28 WrapperNode [2021-11-07 01:45:28,002 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:45:28,003 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:45:28,003 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:45:28,003 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:45:28,011 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:45:28" (1/1) ... [2021-11-07 01:45:28,041 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:45:28" (1/1) ... [2021-11-07 01:45:28,063 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:45:28,064 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:45:28,064 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:45:28,064 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:45:28,074 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:45:28" (1/1) ... [2021-11-07 01:45:28,074 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:45:28" (1/1) ... [2021-11-07 01:45:28,078 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:45:28" (1/1) ... [2021-11-07 01:45:28,079 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:45:28" (1/1) ... [2021-11-07 01:45:28,087 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:45:28" (1/1) ... [2021-11-07 01:45:28,091 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:45:28" (1/1) ... [2021-11-07 01:45:28,093 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:45:28" (1/1) ... [2021-11-07 01:45:28,096 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:45:28,097 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:45:28,097 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:45:28,097 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:45:28,098 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:45:28" (1/1) ... [2021-11-07 01:45:28,106 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:45:28,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a544f069-b0b0-4370-9963-ff673d2ecb84/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:45:28,143 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a544f069-b0b0-4370-9963-ff673d2ecb84/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:45:28,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a544f069-b0b0-4370-9963-ff673d2ecb84/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:45:28,215 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 01:45:28,215 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:45:28,215 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 01:45:28,215 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:45:28,215 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 01:45:28,215 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 01:45:28,215 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:45:28,216 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:45:28,216 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 01:45:28,487 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:45:28,487 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-11-07 01:45:28,489 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:45:28 BoogieIcfgContainer [2021-11-07 01:45:28,490 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:45:28,491 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:45:28,491 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:45:28,494 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:45:28,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:45:27" (1/3) ... [2021-11-07 01:45:28,495 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@93aecbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:45:28, skipping insertion in model container [2021-11-07 01:45:28,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:45:28" (2/3) ... [2021-11-07 01:45:28,496 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@93aecbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:45:28, skipping insertion in model container [2021-11-07 01:45:28,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:45:28" (3/3) ... [2021-11-07 01:45:28,498 INFO L111 eAbstractionObserver]: Analyzing ICFG base_case.i [2021-11-07 01:45:28,503 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:45:28,503 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 01:45:28,558 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:45:28,565 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 [2021-11-07 01:45:28,565 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 01:45:28,582 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 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) [2021-11-07 01:45:28,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-07 01:45:28,588 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:45:28,589 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:45:28,590 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:45:28,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:45:28,596 INFO L85 PathProgramCache]: Analyzing trace with hash 590963434, now seen corresponding path program 1 times [2021-11-07 01:45:28,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:45:28,631 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [756021526] [2021-11-07 01:45:28,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:28,632 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:45:28,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a544f069-b0b0-4370-9963-ff673d2ecb84/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:45:28,635 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a544f069-b0b0-4370-9963-ff673d2ecb84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:45:28,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a544f069-b0b0-4370-9963-ff673d2ecb84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:45:28,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:28,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:45:28,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:28,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:45:28,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:28,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:45:28,930 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:45:28,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [756021526] [2021-11-07 01:45:28,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [756021526] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:45:28,933 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:45:28,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:45:28,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975729780] [2021-11-07 01:45:28,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:45:28,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:45:28,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:45:28,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:45:28,966 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 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) 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) [2021-11-07 01:45:28,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:45:28,982 INFO L93 Difference]: Finished difference Result 30 states and 39 transitions. [2021-11-07 01:45:28,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:45:28,983 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 [2021-11-07 01:45:28,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:45:28,992 INFO L225 Difference]: With dead ends: 30 [2021-11-07 01:45:28,992 INFO L226 Difference]: Without dead ends: 14 [2021-11-07 01:45:28,995 INFO L786 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 [2021-11-07 01:45:29,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-11-07 01:45:29,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-11-07 01:45:29,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 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) [2021-11-07 01:45:29,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2021-11-07 01:45:29,028 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 8 [2021-11-07 01:45:29,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:45:29,029 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2021-11-07 01:45:29,030 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) [2021-11-07 01:45:29,030 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2021-11-07 01:45:29,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-07 01:45:29,031 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:45:29,031 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:45:29,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a544f069-b0b0-4370-9963-ff673d2ecb84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:45:29,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a544f069-b0b0-4370-9963-ff673d2ecb84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:45:29,255 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:45:29,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:45:29,260 INFO L85 PathProgramCache]: Analyzing trace with hash 218784471, now seen corresponding path program 1 times [2021-11-07 01:45:29,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:45:29,264 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1178746333] [2021-11-07 01:45:29,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:29,265 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:45:29,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a544f069-b0b0-4370-9963-ff673d2ecb84/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:45:29,267 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a544f069-b0b0-4370-9963-ff673d2ecb84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:45:29,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a544f069-b0b0-4370-9963-ff673d2ecb84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:45:29,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:29,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:45:29,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:29,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:45:29,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:29,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:45:29,466 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:45:29,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1178746333] [2021-11-07 01:45:29,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1178746333] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:45:29,467 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:45:29,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:45:29,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056008818] [2021-11-07 01:45:29,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:45:29,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:45:29,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:45:29,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:45:29,471 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-11-07 01:45:29,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:45:29,581 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2021-11-07 01:45:29,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:45:29,582 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 [2021-11-07 01:45:29,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:45:29,583 INFO L225 Difference]: With dead ends: 35 [2021-11-07 01:45:29,584 INFO L226 Difference]: Without dead ends: 27 [2021-11-07 01:45:29,584 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:45:29,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-07 01:45:29,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2021-11-07 01:45:29,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 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) [2021-11-07 01:45:29,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-11-07 01:45:29,595 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 8 [2021-11-07 01:45:29,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:45:29,599 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-11-07 01:45:29,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-11-07 01:45:29,600 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-11-07 01:45:29,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-07 01:45:29,601 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:45:29,601 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:45:29,615 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a544f069-b0b0-4370-9963-ff673d2ecb84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-07 01:45:29,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a544f069-b0b0-4370-9963-ff673d2ecb84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:45:29,813 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:45:29,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:45:29,814 INFO L85 PathProgramCache]: Analyzing trace with hash 2010321697, now seen corresponding path program 1 times [2021-11-07 01:45:29,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:45:29,815 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1769453031] [2021-11-07 01:45:29,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:29,816 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:45:29,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a544f069-b0b0-4370-9963-ff673d2ecb84/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:45:29,817 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a544f069-b0b0-4370-9963-ff673d2ecb84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:45:29,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a544f069-b0b0-4370-9963-ff673d2ecb84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:45:29,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:29,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:45:29,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:30,058 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:45:30,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:30,160 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:45:30,161 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:45:30,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1769453031] [2021-11-07 01:45:30,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1769453031] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:45:30,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1289454048] [2021-11-07 01:45:30,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:30,162 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:45:30,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a544f069-b0b0-4370-9963-ff673d2ecb84/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:45:30,164 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a544f069-b0b0-4370-9963-ff673d2ecb84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:45:30,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a544f069-b0b0-4370-9963-ff673d2ecb84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-07 01:45:30,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:30,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:45:30,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:30,400 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:45:30,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:30,480 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:45:30,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1289454048] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:45:30,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149635039] [2021-11-07 01:45:30,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:30,481 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:45:30,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a544f069-b0b0-4370-9963-ff673d2ecb84/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:45:30,483 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a544f069-b0b0-4370-9963-ff673d2ecb84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:45:30,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a544f069-b0b0-4370-9963-ff673d2ecb84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-07 01:45:30,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:30,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:45:30,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:30,674 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:45:30,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:30,766 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:45:30,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149635039] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:45:30,766 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:45:30,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2021-11-07 01:45:30,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634139765] [2021-11-07 01:45:30,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:45:30,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:45:30,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:45:30,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:45:30,771 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 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) [2021-11-07 01:45:31,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:45:31,067 INFO L93 Difference]: Finished difference Result 79 states and 97 transitions. [2021-11-07 01:45:31,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:45:31,068 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 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 16 [2021-11-07 01:45:31,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:45:31,070 INFO L225 Difference]: With dead ends: 79 [2021-11-07 01:45:31,070 INFO L226 Difference]: Without dead ends: 71 [2021-11-07 01:45:31,071 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:45:31,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-11-07 01:45:31,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 35. [2021-11-07 01:45:31,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 34 states have internal predecessors, (43), 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) [2021-11-07 01:45:31,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2021-11-07 01:45:31,079 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 16 [2021-11-07 01:45:31,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:45:31,079 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2021-11-07 01:45:31,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 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) [2021-11-07 01:45:31,080 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2021-11-07 01:45:31,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-07 01:45:31,081 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:45:31,082 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:45:31,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a544f069-b0b0-4370-9963-ff673d2ecb84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:45:31,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a544f069-b0b0-4370-9963-ff673d2ecb84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:45:31,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a544f069-b0b0-4370-9963-ff673d2ecb84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:45:31,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a544f069-b0b0-4370-9963-ff673d2ecb84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a544f069-b0b0-4370-9963-ff673d2ecb84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a544f069-b0b0-4370-9963-ff673d2ecb84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:45:31,685 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:45:31,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:45:31,685 INFO L85 PathProgramCache]: Analyzing trace with hash 2000074165, now seen corresponding path program 2 times [2021-11-07 01:45:31,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:45:31,686 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [521537441] [2021-11-07 01:45:31,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:45:31,687 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:45:31,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a544f069-b0b0-4370-9963-ff673d2ecb84/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:45:31,691 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a544f069-b0b0-4370-9963-ff673d2ecb84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:45:31,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a544f069-b0b0-4370-9963-ff673d2ecb84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:45:31,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:45:31,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:45:31,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:45:31,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:32,107 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:45:32,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:32,447 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:45:32,448 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:45:32,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [521537441] [2021-11-07 01:45:32,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [521537441] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:45:32,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [174695334] [2021-11-07 01:45:32,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:45:32,449 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:45:32,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a544f069-b0b0-4370-9963-ff673d2ecb84/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:45:32,457 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a544f069-b0b0-4370-9963-ff673d2ecb84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:45:32,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a544f069-b0b0-4370-9963-ff673d2ecb84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-07 01:45:32,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:45:32,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:45:32,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:45:32,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:32,876 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:45:32,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:33,025 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:45:33,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [174695334] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:45:33,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744901737] [2021-11-07 01:45:33,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:45:33,027 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:45:33,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a544f069-b0b0-4370-9963-ff673d2ecb84/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:45:33,031 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a544f069-b0b0-4370-9963-ff673d2ecb84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:45:33,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a544f069-b0b0-4370-9963-ff673d2ecb84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-07 01:45:33,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:45:33,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:45:33,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:45:33,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:33,355 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:45:33,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:33,530 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:45:33,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744901737] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:45:33,530 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:45:33,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 16 [2021-11-07 01:45:33,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735429623] [2021-11-07 01:45:33,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 01:45:33,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:45:33,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 01:45:33,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:45:33,533 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand has 16 states, 16 states have (on average 3.625) internal successors, (58), 16 states have internal predecessors, (58), 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) [2021-11-07 01:45:34,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:45:34,729 INFO L93 Difference]: Finished difference Result 167 states and 205 transitions. [2021-11-07 01:45:34,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-07 01:45:34,730 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 16 states have internal predecessors, (58), 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 32 [2021-11-07 01:45:34,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:45:34,733 INFO L225 Difference]: With dead ends: 167 [2021-11-07 01:45:34,733 INFO L226 Difference]: Without dead ends: 159 [2021-11-07 01:45:34,734 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-11-07 01:45:34,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-11-07 01:45:34,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 67. [2021-11-07 01:45:34,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.2575757575757576) internal successors, (83), 66 states have internal predecessors, (83), 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) [2021-11-07 01:45:34,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 83 transitions. [2021-11-07 01:45:34,745 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 83 transitions. Word has length 32 [2021-11-07 01:45:34,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:45:34,746 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 83 transitions. [2021-11-07 01:45:34,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 16 states have internal predecessors, (58), 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) [2021-11-07 01:45:34,746 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 83 transitions. [2021-11-07 01:45:34,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 01:45:34,748 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:45:34,749 INFO L513 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:45:34,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a544f069-b0b0-4370-9963-ff673d2ecb84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:45:34,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a544f069-b0b0-4370-9963-ff673d2ecb84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:45:35,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a544f069-b0b0-4370-9963-ff673d2ecb84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:45:35,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a544f069-b0b0-4370-9963-ff673d2ecb84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a544f069-b0b0-4370-9963-ff673d2ecb84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a544f069-b0b0-4370-9963-ff673d2ecb84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:45:35,363 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:45:35,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:45:35,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1784611549, now seen corresponding path program 3 times [2021-11-07 01:45:35,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:45:35,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [642418535] [2021-11-07 01:45:35,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:45:35,365 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:45:35,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a544f069-b0b0-4370-9963-ff673d2ecb84/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:45:35,367 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a544f069-b0b0-4370-9963-ff673d2ecb84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:45:35,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a544f069-b0b0-4370-9963-ff673d2ecb84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:45:42,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-11-07 01:45:42,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:45:42,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 01:45:42,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:43,184 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:45:43,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:44,928 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:45:44,928 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:45:44,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [642418535] [2021-11-07 01:45:44,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [642418535] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:45:44,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [532374127] [2021-11-07 01:45:44,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:45:44,929 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:45:44,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a544f069-b0b0-4370-9963-ff673d2ecb84/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:45:44,930 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a544f069-b0b0-4370-9963-ff673d2ecb84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:45:44,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a544f069-b0b0-4370-9963-ff673d2ecb84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-07 01:45:45,236 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:45:45,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520205862] [2021-11-07 01:45:45,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:45:45,236 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:45:45,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a544f069-b0b0-4370-9963-ff673d2ecb84/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:45:45,244 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a544f069-b0b0-4370-9963-ff673d2ecb84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:45:45,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a544f069-b0b0-4370-9963-ff673d2ecb84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 1 [2021-11-07 01:45:45,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a544f069-b0b0-4370-9963-ff673d2ecb84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process