./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-sets/test_add-1.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_496365ea-6e00-480c-959e-6ecef220bb88/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_496365ea-6e00-480c-959e-6ecef220bb88/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_496365ea-6e00-480c-959e-6ecef220bb88/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_496365ea-6e00-480c-959e-6ecef220bb88/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-sets/test_add-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_496365ea-6e00-480c-959e-6ecef220bb88/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_496365ea-6e00-480c-959e-6ecef220bb88/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 ed7fc1ee8e8624c54bbfaff1033820d20aa5fb88ac8eae06fb8e7107f72c3762 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:16:22,395 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:16:22,397 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:16:22,433 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:16:22,433 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:16:22,435 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:16:22,437 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:16:22,439 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:16:22,442 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:16:22,443 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:16:22,444 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:16:22,445 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:16:22,446 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:16:22,447 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:16:22,449 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:16:22,451 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:16:22,452 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:16:22,453 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:16:22,455 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:16:22,458 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:16:22,460 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:16:22,462 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:16:22,463 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:16:22,464 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:16:22,469 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:16:22,473 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:16:22,473 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:16:22,475 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:16:22,479 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:16:22,480 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:16:22,482 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:16:22,483 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:16:22,485 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:16:22,486 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:16:22,488 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:16:22,489 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:16:22,490 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:16:22,491 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:16:22,491 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:16:22,492 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:16:22,493 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:16:22,495 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_496365ea-6e00-480c-959e-6ecef220bb88/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 14:16:22,537 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:16:22,538 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:16:22,539 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:16:22,539 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:16:22,539 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:16:22,539 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:16:22,540 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:16:22,540 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 14:16:22,540 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:16:22,540 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:16:22,541 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 14:16:22,541 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 14:16:22,541 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:16:22,541 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 14:16:22,542 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 14:16:22,542 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 14:16:22,543 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:16:22,543 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:16:22,543 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 14:16:22,543 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:16:22,544 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:16:22,544 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:16:22,544 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:16:22,544 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:16:22,544 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:16:22,545 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:16:22,545 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:16:22,545 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:16:22,545 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:16:22,546 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:16:22,546 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:16:22,546 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:16:22,546 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:16:22,547 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:16:22,547 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:16:22,547 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 14:16:22,547 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 14:16:22,547 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:16:22,548 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:16:22,548 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:16:22,548 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_496365ea-6e00-480c-959e-6ecef220bb88/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_496365ea-6e00-480c-959e-6ecef220bb88/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ed7fc1ee8e8624c54bbfaff1033820d20aa5fb88ac8eae06fb8e7107f72c3762 [2021-11-19 14:16:22,824 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:16:22,860 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:16:22,863 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:16:22,864 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:16:22,865 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:16:22,866 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_496365ea-6e00-480c-959e-6ecef220bb88/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/ldv-sets/test_add-1.i [2021-11-19 14:16:22,941 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_496365ea-6e00-480c-959e-6ecef220bb88/bin/utaipan-UbGMyvGFUs/data/587ce4bd5/681991ef9fea45999633d5b9cfa04022/FLAG34298de27 [2021-11-19 14:16:23,587 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:16:23,588 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_496365ea-6e00-480c-959e-6ecef220bb88/sv-benchmarks/c/ldv-sets/test_add-1.i [2021-11-19 14:16:23,624 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_496365ea-6e00-480c-959e-6ecef220bb88/bin/utaipan-UbGMyvGFUs/data/587ce4bd5/681991ef9fea45999633d5b9cfa04022/FLAG34298de27 [2021-11-19 14:16:23,863 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_496365ea-6e00-480c-959e-6ecef220bb88/bin/utaipan-UbGMyvGFUs/data/587ce4bd5/681991ef9fea45999633d5b9cfa04022 [2021-11-19 14:16:23,866 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:16:23,867 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:16:23,869 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:16:23,869 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:16:23,879 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:16:23,880 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:16:23" (1/1) ... [2021-11-19 14:16:23,881 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3210b9fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:23, skipping insertion in model container [2021-11-19 14:16:23,882 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:16:23" (1/1) ... [2021-11-19 14:16:23,893 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:16:23,954 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:16:24,339 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_496365ea-6e00-480c-959e-6ecef220bb88/sv-benchmarks/c/ldv-sets/test_add-1.i[25792,25805] [2021-11-19 14:16:24,343 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:16:24,352 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 14:16:24,353 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@24f88d91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:24, skipping insertion in model container [2021-11-19 14:16:24,353 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:16:24,354 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 14:16:24,356 INFO L158 Benchmark]: Toolchain (without parser) took 487.50ms. Allocated memory is still 96.5MB. Free memory was 54.3MB in the beginning and 67.8MB in the end (delta: -13.5MB). Peak memory consumption was 4.4MB. Max. memory is 16.1GB. [2021-11-19 14:16:24,356 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 96.5MB. Free memory was 71.9MB in the beginning and 71.8MB in the end (delta: 84.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:16:24,357 INFO L158 Benchmark]: CACSL2BoogieTranslator took 484.51ms. Allocated memory is still 96.5MB. Free memory was 54.1MB in the beginning and 67.8MB in the end (delta: -13.7MB). Peak memory consumption was 4.4MB. Max. memory is 16.1GB. [2021-11-19 14:16:24,359 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 96.5MB. Free memory was 71.9MB in the beginning and 71.8MB in the end (delta: 84.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 484.51ms. Allocated memory is still 96.5MB. Free memory was 54.1MB in the beginning and 67.8MB in the end (delta: -13.7MB). Peak memory consumption was 4.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 635]: 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_496365ea-6e00-480c-959e-6ecef220bb88/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_496365ea-6e00-480c-959e-6ecef220bb88/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_496365ea-6e00-480c-959e-6ecef220bb88/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_496365ea-6e00-480c-959e-6ecef220bb88/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-sets/test_add-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_496365ea-6e00-480c-959e-6ecef220bb88/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_496365ea-6e00-480c-959e-6ecef220bb88/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 ed7fc1ee8e8624c54bbfaff1033820d20aa5fb88ac8eae06fb8e7107f72c3762 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:16:26,885 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:16:26,889 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:16:26,949 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:16:26,950 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:16:26,954 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:16:26,957 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:16:26,961 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:16:26,965 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:16:26,976 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:16:26,978 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:16:26,980 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:16:26,980 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:16:26,982 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:16:26,983 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:16:26,985 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:16:26,986 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:16:26,988 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:16:26,996 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:16:26,999 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:16:27,001 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:16:27,003 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:16:27,005 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:16:27,006 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:16:27,011 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:16:27,012 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:16:27,012 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:16:27,014 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:16:27,015 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:16:27,017 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:16:27,017 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:16:27,018 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:16:27,020 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:16:27,021 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:16:27,023 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:16:27,024 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:16:27,025 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:16:27,026 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:16:27,026 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:16:27,028 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:16:27,029 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:16:27,030 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_496365ea-6e00-480c-959e-6ecef220bb88/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 14:16:27,064 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:16:27,065 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:16:27,067 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:16:27,068 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:16:27,068 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:16:27,068 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:16:27,068 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:16:27,069 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:16:27,069 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:16:27,069 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:16:27,072 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:16:27,072 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:16:27,073 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:16:27,073 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:16:27,073 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:16:27,074 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:16:27,074 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:16:27,074 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:16:27,074 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 14:16:27,075 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 14:16:27,075 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:16:27,075 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:16:27,076 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:16:27,076 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:16:27,076 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:16:27,076 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 14:16:27,077 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:16:27,077 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:16:27,077 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:16:27,078 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:16:27,078 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:16:27,078 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 14:16:27,078 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 14:16:27,079 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:16:27,079 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:16:27,080 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:16:27,080 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_496365ea-6e00-480c-959e-6ecef220bb88/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_496365ea-6e00-480c-959e-6ecef220bb88/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ed7fc1ee8e8624c54bbfaff1033820d20aa5fb88ac8eae06fb8e7107f72c3762 [2021-11-19 14:16:27,561 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:16:27,597 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:16:27,600 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:16:27,602 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:16:27,602 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:16:27,604 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_496365ea-6e00-480c-959e-6ecef220bb88/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/ldv-sets/test_add-1.i [2021-11-19 14:16:27,691 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_496365ea-6e00-480c-959e-6ecef220bb88/bin/utaipan-UbGMyvGFUs/data/c6c60d30b/a4d21553292b4ed1aeac244cf85fc8d4/FLAGe2ead99c2 [2021-11-19 14:16:28,438 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:16:28,439 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_496365ea-6e00-480c-959e-6ecef220bb88/sv-benchmarks/c/ldv-sets/test_add-1.i [2021-11-19 14:16:28,456 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_496365ea-6e00-480c-959e-6ecef220bb88/bin/utaipan-UbGMyvGFUs/data/c6c60d30b/a4d21553292b4ed1aeac244cf85fc8d4/FLAGe2ead99c2 [2021-11-19 14:16:28,724 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_496365ea-6e00-480c-959e-6ecef220bb88/bin/utaipan-UbGMyvGFUs/data/c6c60d30b/a4d21553292b4ed1aeac244cf85fc8d4 [2021-11-19 14:16:28,727 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:16:28,729 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:16:28,731 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:16:28,731 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:16:28,735 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:16:28,736 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:16:28" (1/1) ... [2021-11-19 14:16:28,737 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21d5276f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:28, skipping insertion in model container [2021-11-19 14:16:28,738 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:16:28" (1/1) ... [2021-11-19 14:16:28,746 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:16:28,820 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:16:29,225 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_496365ea-6e00-480c-959e-6ecef220bb88/sv-benchmarks/c/ldv-sets/test_add-1.i[25792,25805] [2021-11-19 14:16:29,229 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:16:29,245 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 14:16:29,256 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:16:29,304 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_496365ea-6e00-480c-959e-6ecef220bb88/sv-benchmarks/c/ldv-sets/test_add-1.i[25792,25805] [2021-11-19 14:16:29,305 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:16:29,311 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:16:29,390 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_496365ea-6e00-480c-959e-6ecef220bb88/sv-benchmarks/c/ldv-sets/test_add-1.i[25792,25805] [2021-11-19 14:16:29,391 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:16:29,467 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:16:29,467 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:29 WrapperNode [2021-11-19 14:16:29,467 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:16:29,468 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:16:29,469 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:16:29,469 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:16:29,476 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:29" (1/1) ... [2021-11-19 14:16:29,501 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:29" (1/1) ... [2021-11-19 14:16:29,529 INFO L137 Inliner]: procedures = 139, calls = 46, calls flagged for inlining = 11, calls inlined = 7, statements flattened = 52 [2021-11-19 14:16:29,530 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:16:29,530 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:16:29,531 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:16:29,531 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:16:29,540 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:29" (1/1) ... [2021-11-19 14:16:29,540 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:29" (1/1) ... [2021-11-19 14:16:29,545 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:29" (1/1) ... [2021-11-19 14:16:29,546 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:29" (1/1) ... [2021-11-19 14:16:29,558 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:29" (1/1) ... [2021-11-19 14:16:29,563 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:29" (1/1) ... [2021-11-19 14:16:29,578 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:29" (1/1) ... [2021-11-19 14:16:29,582 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:16:29,583 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:16:29,584 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:16:29,584 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:16:29,589 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:29" (1/1) ... [2021-11-19 14:16:29,596 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:16:29,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_496365ea-6e00-480c-959e-6ecef220bb88/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:16:29,622 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_496365ea-6e00-480c-959e-6ecef220bb88/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:16:29,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_496365ea-6e00-480c-959e-6ecef220bb88/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:16:29,674 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-19 14:16:29,674 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_list_add [2021-11-19 14:16:29,674 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_list_add [2021-11-19 14:16:29,675 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-19 14:16:29,675 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:16:29,675 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-19 14:16:29,675 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 14:16:29,675 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_in_set [2021-11-19 14:16:29,675 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_in_set [2021-11-19 14:16:29,675 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-19 14:16:29,675 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-19 14:16:29,676 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-19 14:16:29,676 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 14:16:29,676 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:16:29,676 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:16:29,864 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:16:29,866 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:16:30,286 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:16:30,293 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:16:30,294 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 14:16:30,296 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:16:30 BoogieIcfgContainer [2021-11-19 14:16:30,296 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:16:30,298 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:16:30,298 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:16:30,301 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:16:30,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:16:28" (1/3) ... [2021-11-19 14:16:30,302 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66a05aba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:16:30, skipping insertion in model container [2021-11-19 14:16:30,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:29" (2/3) ... [2021-11-19 14:16:30,303 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66a05aba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:16:30, skipping insertion in model container [2021-11-19 14:16:30,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:16:30" (3/3) ... [2021-11-19 14:16:30,304 INFO L111 eAbstractionObserver]: Analyzing ICFG test_add-1.i [2021-11-19 14:16:30,310 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:16:30,311 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 14:16:30,368 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:16:30,376 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 14:16:30,376 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 14:16:30,395 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 14:16:30,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-19 14:16:30,402 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:16:30,403 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:16:30,403 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:16:30,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:16:30,410 INFO L85 PathProgramCache]: Analyzing trace with hash -313984218, now seen corresponding path program 1 times [2021-11-19 14:16:30,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:16:30,424 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1950864756] [2021-11-19 14:16:30,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:16:30,425 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:16:30,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_496365ea-6e00-480c-959e-6ecef220bb88/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:16:30,429 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_496365ea-6e00-480c-959e-6ecef220bb88/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:16:30,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_496365ea-6e00-480c-959e-6ecef220bb88/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 14:16:30,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:16:30,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-19 14:16:30,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:16:30,686 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 14:16:30,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:16:30,796 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 14:16:30,797 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:16:30,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1950864756] [2021-11-19 14:16:30,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1950864756] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:16:30,802 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:16:30,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2021-11-19 14:16:30,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776056649] [2021-11-19 14:16:30,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:16:30,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 14:16:30,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:16:30,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 14:16:30,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 14:16:30,881 INFO L87 Difference]: Start difference. First operand has 29 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 14:16:30,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:16:30,911 INFO L93 Difference]: Finished difference Result 55 states and 68 transitions. [2021-11-19 14:16:30,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 14:16:30,914 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-11-19 14:16:30,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:16:30,925 INFO L225 Difference]: With dead ends: 55 [2021-11-19 14:16:30,925 INFO L226 Difference]: Without dead ends: 25 [2021-11-19 14:16:30,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 34 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 14:16:30,936 INFO L933 BasicCegarLoop]: 32 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, 32 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 14:16:30,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:16:30,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-19 14:16:30,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-11-19 14:16:30,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 14:16:31,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-11-19 14:16:31,003 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 18 [2021-11-19 14:16:31,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:16:31,003 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-11-19 14:16:31,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 14:16:31,004 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-11-19 14:16:31,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-19 14:16:31,007 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:16:31,007 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:16:31,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_496365ea-6e00-480c-959e-6ecef220bb88/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 14:16:31,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_496365ea-6e00-480c-959e-6ecef220bb88/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:16:31,225 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:16:31,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:16:31,226 INFO L85 PathProgramCache]: Analyzing trace with hash 160343226, now seen corresponding path program 1 times [2021-11-19 14:16:31,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:16:31,227 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [592121794] [2021-11-19 14:16:31,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:16:31,227 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:16:31,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_496365ea-6e00-480c-959e-6ecef220bb88/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:16:31,228 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_496365ea-6e00-480c-959e-6ecef220bb88/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:16:31,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_496365ea-6e00-480c-959e-6ecef220bb88/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 14:16:31,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:16:31,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:16:31,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:16:31,421 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:16:31,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:16:31,509 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 14:16:31,510 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:16:31,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [592121794] [2021-11-19 14:16:31,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [592121794] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:16:31,514 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:16:31,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2021-11-19 14:16:31,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604431241] [2021-11-19 14:16:31,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:16:31,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:16:31,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:16:31,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:16:31,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:16:31,521 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 14:16:31,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:16:31,554 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2021-11-19 14:16:31,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:16:31,556 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-11-19 14:16:31,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:16:31,559 INFO L225 Difference]: With dead ends: 40 [2021-11-19 14:16:31,559 INFO L226 Difference]: Without dead ends: 28 [2021-11-19 14:16:31,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:16:31,563 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 0 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:16:31,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 77 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:16:31,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-19 14:16:31,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-11-19 14:16:31,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-19 14:16:31,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-11-19 14:16:31,585 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 18 [2021-11-19 14:16:31,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:16:31,586 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-11-19 14:16:31,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 14:16:31,587 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-11-19 14:16:31,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-19 14:16:31,588 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:16:31,588 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:16:31,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_496365ea-6e00-480c-959e-6ecef220bb88/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 14:16:31,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_496365ea-6e00-480c-959e-6ecef220bb88/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:16:31,804 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:16:31,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:16:31,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1203047025, now seen corresponding path program 1 times [2021-11-19 14:16:31,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:16:31,807 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1139107011] [2021-11-19 14:16:31,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:16:31,808 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:16:31,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_496365ea-6e00-480c-959e-6ecef220bb88/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:16:31,809 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_496365ea-6e00-480c-959e-6ecef220bb88/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:16:31,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_496365ea-6e00-480c-959e-6ecef220bb88/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 14:16:31,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:16:31,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-19 14:16:31,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:16:32,529 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:16:32,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:16:33,023 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 14:16:33,023 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:16:33,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1139107011] [2021-11-19 14:16:33,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1139107011] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:16:33,024 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:16:33,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 11 [2021-11-19 14:16:33,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924334305] [2021-11-19 14:16:33,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:16:33,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:16:33,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:16:33,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:16:33,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:16:33,026 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 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 14:16:33,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:16:33,374 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2021-11-19 14:16:33,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:16:33,375 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 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 18 [2021-11-19 14:16:33,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:16:33,376 INFO L225 Difference]: With dead ends: 61 [2021-11-19 14:16:33,377 INFO L226 Difference]: Without dead ends: 35 [2021-11-19 14:16:33,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:16:33,379 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 23 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:16:33,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 50 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 14 Unchecked, 0.1s Time] [2021-11-19 14:16:33,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-11-19 14:16:33,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2021-11-19 14:16:33,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-19 14:16:33,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2021-11-19 14:16:33,389 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 18 [2021-11-19 14:16:33,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:16:33,391 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2021-11-19 14:16:33,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 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 14:16:33,392 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2021-11-19 14:16:33,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-19 14:16:33,393 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:16:33,393 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:16:33,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_496365ea-6e00-480c-959e-6ecef220bb88/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 14:16:33,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_496365ea-6e00-480c-959e-6ecef220bb88/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:16:33,618 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:16:33,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:16:33,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1174648070, now seen corresponding path program 1 times [2021-11-19 14:16:33,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:16:33,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1670373737] [2021-11-19 14:16:33,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:16:33,620 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:16:33,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_496365ea-6e00-480c-959e-6ecef220bb88/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:16:33,621 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_496365ea-6e00-480c-959e-6ecef220bb88/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:16:33,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_496365ea-6e00-480c-959e-6ecef220bb88/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 14:16:33,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:16:33,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-19 14:16:33,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:16:34,168 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 14:16:34,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:16:34,538 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 14:16:34,538 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:16:34,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1670373737] [2021-11-19 14:16:34,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1670373737] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:16:34,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2064353587] [2021-11-19 14:16:34,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:16:34,539 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:16:34,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_496365ea-6e00-480c-959e-6ecef220bb88/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:16:34,555 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_496365ea-6e00-480c-959e-6ecef220bb88/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:16:34,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_496365ea-6e00-480c-959e-6ecef220bb88/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-11-19 14:16:34,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:16:34,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:16:34,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:16:34,741 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:16:34,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:16:34,803 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:16:34,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2064353587] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:16:34,804 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:16:34,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [6, 6] total 13 [2021-11-19 14:16:34,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93550356] [2021-11-19 14:16:34,811 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:16:34,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:16:34,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:16:34,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:16:34,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:16:34,814 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 14:16:34,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:16:34,826 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2021-11-19 14:16:34,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:16:34,826 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2021-11-19 14:16:34,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:16:34,828 INFO L225 Difference]: With dead ends: 37 [2021-11-19 14:16:34,828 INFO L226 Difference]: Without dead ends: 34 [2021-11-19 14:16:34,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:16:34,829 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:16:34,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 80 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:16:34,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-19 14:16:34,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2021-11-19 14:16:34,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 23 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-19 14:16:34,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2021-11-19 14:16:34,836 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 21 [2021-11-19 14:16:34,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:16:34,836 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2021-11-19 14:16:34,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 14:16:34,837 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2021-11-19 14:16:34,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-19 14:16:34,837 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:16:34,838 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:16:34,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_496365ea-6e00-480c-959e-6ecef220bb88/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2021-11-19 14:16:35,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_496365ea-6e00-480c-959e-6ecef220bb88/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 14:16:35,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_496365ea-6e00-480c-959e-6ecef220bb88/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_496365ea-6e00-480c-959e-6ecef220bb88/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:16:35,240 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:16:35,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:16:35,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1225441725, now seen corresponding path program 1 times [2021-11-19 14:16:35,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:16:35,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [976238030] [2021-11-19 14:16:35,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:16:35,241 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:16:35,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_496365ea-6e00-480c-959e-6ecef220bb88/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:16:35,242 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_496365ea-6e00-480c-959e-6ecef220bb88/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:16:35,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_496365ea-6e00-480c-959e-6ecef220bb88/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 14:16:35,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:16:35,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-19 14:16:35,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:16:35,722 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 14:16:35,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:16:36,144 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 14:16:36,144 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:16:36,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [976238030] [2021-11-19 14:16:36,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [976238030] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:16:36,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1270515347] [2021-11-19 14:16:36,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:16:36,145 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:16:36,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_496365ea-6e00-480c-959e-6ecef220bb88/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:16:36,148 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_496365ea-6e00-480c-959e-6ecef220bb88/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:16:36,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_496365ea-6e00-480c-959e-6ecef220bb88/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-19 14:16:36,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:16:36,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-19 14:16:36,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:16:37,799 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 14:16:37,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:16:39,733 INFO L354 Elim1Store]: treesize reduction 280, result has 62.0 percent of original size [2021-11-19 14:16:39,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 132 treesize of output 476