./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test8-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test8-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b6c6a722152c52daf4f5e799c877f12032a99023b4a9ea1a935c1ce634969e85 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:39:59,357 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:39:59,360 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:39:59,414 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:39:59,415 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:39:59,416 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:39:59,418 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:39:59,424 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:39:59,427 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:39:59,432 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:39:59,434 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:39:59,436 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:39:59,437 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:39:59,440 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:39:59,442 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:39:59,446 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:39:59,448 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:39:59,449 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:39:59,451 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:39:59,459 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:39:59,461 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:39:59,463 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:39:59,466 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:39:59,468 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:39:59,477 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:39:59,477 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:39:59,478 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:39:59,480 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:39:59,481 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:39:59,482 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:39:59,483 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:39:59,484 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:39:59,486 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:39:59,487 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:39:59,489 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:39:59,489 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:39:59,490 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:39:59,490 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:39:59,490 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:39:59,491 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:39:59,492 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:39:59,494 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 23:39:59,526 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:39:59,526 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:39:59,527 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:39:59,527 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:39:59,528 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:39:59,528 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:39:59,528 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:39:59,528 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:39:59,529 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:39:59,529 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:39:59,529 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:39:59,529 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:39:59,529 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:39:59,530 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:39:59,530 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:39:59,530 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:39:59,531 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:39:59,531 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:39:59,531 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:39:59,532 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:39:59,532 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:39:59,532 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:39:59,532 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:39:59,532 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:39:59,533 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:39:59,533 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:39:59,533 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:39:59,533 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:39:59,533 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:39:59,534 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:39:59,534 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:39:59,534 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:39:59,534 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:39:59,535 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:39:59,539 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:39:59,539 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:39:59,540 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:39:59,540 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:39:59,540 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:39:59,540 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:39:59,540 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_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b6c6a722152c52daf4f5e799c877f12032a99023b4a9ea1a935c1ce634969e85 [2021-11-12 23:39:59,850 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:39:59,882 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:39:59,885 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:39:59,886 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:39:59,887 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:39:59,889 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test8-1.i [2021-11-12 23:39:59,965 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/data/bbe45d9f2/1cd70414bbd14f019b7327e7ba7178e8/FLAG1ddd23fc7 [2021-11-12 23:40:00,598 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:40:00,599 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test8-1.i [2021-11-12 23:40:00,616 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/data/bbe45d9f2/1cd70414bbd14f019b7327e7ba7178e8/FLAG1ddd23fc7 [2021-11-12 23:40:00,792 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/data/bbe45d9f2/1cd70414bbd14f019b7327e7ba7178e8 [2021-11-12 23:40:00,795 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:40:00,797 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:40:00,801 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:40:00,802 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:40:00,805 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:40:00,806 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:40:00" (1/1) ... [2021-11-12 23:40:00,807 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d11b426 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:40:00, skipping insertion in model container [2021-11-12 23:40:00,808 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:40:00" (1/1) ... [2021-11-12 23:40:00,815 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:40:00,900 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:40:01,533 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_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test8-1.i[33021,33034] [2021-11-12 23:40:01,745 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_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test8-1.i[45234,45247] [2021-11-12 23:40:01,751 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:40:01,761 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-12 23:40:01,761 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7e2dc09f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:40:01, skipping insertion in model container [2021-11-12 23:40:01,762 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:40:01,762 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 23:40:01,764 INFO L158 Benchmark]: Toolchain (without parser) took 966.41ms. Allocated memory was 94.4MB in the beginning and 123.7MB in the end (delta: 29.4MB). Free memory was 57.8MB in the beginning and 89.1MB in the end (delta: -31.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-12 23:40:01,765 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 94.4MB. Free memory was 64.4MB in the beginning and 64.3MB in the end (delta: 25.3kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:40:01,767 INFO L158 Benchmark]: CACSL2BoogieTranslator took 960.71ms. Allocated memory was 94.4MB in the beginning and 123.7MB in the end (delta: 29.4MB). Free memory was 57.6MB in the beginning and 89.1MB in the end (delta: -31.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-12 23:40:01,769 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 94.4MB. Free memory was 64.4MB in the beginning and 64.3MB in the end (delta: 25.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 960.71ms. Allocated memory was 94.4MB in the beginning and 123.7MB in the end (delta: 29.4MB). Free memory was 57.6MB in the beginning and 89.1MB in the end (delta: -31.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 766]: 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_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test8-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b6c6a722152c52daf4f5e799c877f12032a99023b4a9ea1a935c1ce634969e85 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:40:04,070 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:40:04,074 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:40:04,129 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:40:04,130 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:40:04,134 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:40:04,136 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:40:04,141 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:40:04,145 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:40:04,153 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:40:04,155 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:40:04,157 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:40:04,158 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:40:04,160 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:40:04,163 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:40:04,167 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:40:04,169 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:40:04,171 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:40:04,173 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:40:04,182 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:40:04,184 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:40:04,186 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:40:04,188 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:40:04,191 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:40:04,200 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:40:04,201 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:40:04,202 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:40:04,204 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:40:04,205 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:40:04,206 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:40:04,207 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:40:04,208 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:40:04,210 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:40:04,211 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:40:04,213 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:40:04,213 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:40:04,214 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:40:04,215 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:40:04,215 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:40:04,217 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:40:04,218 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:40:04,224 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 23:40:04,268 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:40:04,268 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:40:04,270 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:40:04,270 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:40:04,270 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:40:04,271 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:40:04,271 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:40:04,271 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:40:04,272 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:40:04,272 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:40:04,274 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:40:04,275 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:40:04,275 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:40:04,276 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:40:04,276 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:40:04,276 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:40:04,277 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:40:04,277 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:40:04,277 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 23:40:04,277 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 23:40:04,278 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:40:04,278 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:40:04,278 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:40:04,279 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:40:04,279 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:40:04,279 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 23:40:04,280 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:40:04,280 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:40:04,280 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:40:04,281 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:40:04,281 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:40:04,281 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 23:40:04,282 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 23:40:04,282 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:40:04,283 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:40:04,283 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:40:04,283 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_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b6c6a722152c52daf4f5e799c877f12032a99023b4a9ea1a935c1ce634969e85 [2021-11-12 23:40:04,713 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:40:04,744 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:40:04,747 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:40:04,748 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:40:04,749 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:40:04,750 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test8-1.i [2021-11-12 23:40:04,831 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/data/bfa04b0e7/d30cca715d0c4344b1fc48a98802fa2b/FLAG2fba0d535 [2021-11-12 23:40:05,544 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:40:05,545 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test8-1.i [2021-11-12 23:40:05,563 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/data/bfa04b0e7/d30cca715d0c4344b1fc48a98802fa2b/FLAG2fba0d535 [2021-11-12 23:40:05,729 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/data/bfa04b0e7/d30cca715d0c4344b1fc48a98802fa2b [2021-11-12 23:40:05,732 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:40:05,733 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:40:05,735 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:40:05,735 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:40:05,744 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:40:05,745 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:40:05" (1/1) ... [2021-11-12 23:40:05,746 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@121b62ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:40:05, skipping insertion in model container [2021-11-12 23:40:05,747 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:40:05" (1/1) ... [2021-11-12 23:40:05,755 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:40:05,810 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:40:06,300 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_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test8-1.i[33021,33034] [2021-11-12 23:40:06,494 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_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test8-1.i[45234,45247] [2021-11-12 23:40:06,502 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:40:06,529 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 23:40:06,554 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:40:06,587 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_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test8-1.i[33021,33034] [2021-11-12 23:40:06,746 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_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test8-1.i[45234,45247] [2021-11-12 23:40:06,750 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:40:06,759 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:40:06,798 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_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test8-1.i[33021,33034] [2021-11-12 23:40:06,865 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_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test8-1.i[45234,45247] [2021-11-12 23:40:06,869 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:40:06,924 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:40:06,925 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:40:06 WrapperNode [2021-11-12 23:40:06,925 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:40:06,927 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:40:06,927 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:40:06,928 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:40:06,936 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:40:06" (1/1) ... [2021-11-12 23:40:07,006 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:40:06" (1/1) ... [2021-11-12 23:40:07,099 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:40:07,107 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:40:07,107 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:40:07,107 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:40:07,116 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:40:06" (1/1) ... [2021-11-12 23:40:07,117 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:40:06" (1/1) ... [2021-11-12 23:40:07,134 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:40:06" (1/1) ... [2021-11-12 23:40:07,134 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:40:06" (1/1) ... [2021-11-12 23:40:07,237 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:40:06" (1/1) ... [2021-11-12 23:40:07,264 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:40:06" (1/1) ... [2021-11-12 23:40:07,284 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:40:06" (1/1) ... [2021-11-12 23:40:07,296 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:40:07,303 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:40:07,304 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:40:07,304 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:40:07,304 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:40:06" (1/1) ... [2021-11-12 23:40:07,311 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:40:07,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:40:07,337 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:40:07,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:40:07,393 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-12 23:40:07,393 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-12 23:40:07,394 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-12 23:40:07,394 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-12 23:40:07,394 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-12 23:40:07,394 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-12 23:40:07,394 INFO L130 BoogieDeclarations]: Found specification of procedure test_int [2021-11-12 23:40:07,394 INFO L138 BoogieDeclarations]: Found implementation of procedure test_int [2021-11-12 23:40:07,395 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-12 23:40:07,395 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-12 23:40:07,395 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:40:07,395 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-12 23:40:07,395 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-12 23:40:07,395 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-12 23:40:07,395 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-12 23:40:07,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 23:40:07,396 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:40:07,396 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:40:15,212 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:40:15,213 INFO L299 CfgBuilder]: Removed 62 assume(true) statements. [2021-11-12 23:40:15,216 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:40:15 BoogieIcfgContainer [2021-11-12 23:40:15,216 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:40:15,218 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:40:15,219 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:40:15,222 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:40:15,222 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:40:05" (1/3) ... [2021-11-12 23:40:15,223 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62fc8877 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:40:15, skipping insertion in model container [2021-11-12 23:40:15,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:40:06" (2/3) ... [2021-11-12 23:40:15,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62fc8877 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:40:15, skipping insertion in model container [2021-11-12 23:40:15,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:40:15" (3/3) ... [2021-11-12 23:40:15,225 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_FNV_test8-1.i [2021-11-12 23:40:15,231 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:40:15,232 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-12 23:40:15,289 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:40:15,296 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 23:40:15,296 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-12 23:40:15,330 INFO L276 IsEmpty]: Start isEmpty. Operand has 226 states, 200 states have (on average 1.695) internal successors, (339), 217 states have internal predecessors, (339), 20 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (20), 6 states have call predecessors, (20), 20 states have call successors, (20) [2021-11-12 23:40:15,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-12 23:40:15,337 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:40:15,338 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:40:15,339 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:40:15,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:40:15,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1334755327, now seen corresponding path program 1 times [2021-11-12 23:40:15,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:40:15,366 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [274198792] [2021-11-12 23:40:15,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:40:15,368 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:40:15,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:40:15,375 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:40:15,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 23:40:15,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:40:15,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-12 23:40:15,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:40:15,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:40:15,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:40:15,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:40:15,680 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:40:15,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [274198792] [2021-11-12 23:40:15,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [274198792] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:40:15,682 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:40:15,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-12 23:40:15,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329586468] [2021-11-12 23:40:15,684 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:40:15,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 23:40:15,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:40:15,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 23:40:15,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 23:40:15,729 INFO L87 Difference]: Start difference. First operand has 226 states, 200 states have (on average 1.695) internal successors, (339), 217 states have internal predecessors, (339), 20 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (20), 6 states have call predecessors, (20), 20 states have call successors, (20) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:40:15,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:40:15,817 INFO L93 Difference]: Finished difference Result 450 states and 773 transitions. [2021-11-12 23:40:15,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 23:40:15,820 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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 9 [2021-11-12 23:40:15,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:40:15,847 INFO L225 Difference]: With dead ends: 450 [2021-11-12 23:40:15,847 INFO L226 Difference]: Without dead ends: 222 [2021-11-12 23:40:15,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 23:40:15,856 INFO L933 BasicCegarLoop]: 311 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.22ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-12 23:40:15,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 8.22ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-12 23:40:15,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-11-12 23:40:15,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 222. [2021-11-12 23:40:15,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 197 states have (on average 1.3553299492385786) internal successors, (267), 213 states have internal predecessors, (267), 20 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (20), 6 states have call predecessors, (20), 20 states have call successors, (20) [2021-11-12 23:40:15,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 307 transitions. [2021-11-12 23:40:15,921 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 307 transitions. Word has length 9 [2021-11-12 23:40:15,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:40:15,921 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 307 transitions. [2021-11-12 23:40:15,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:40:15,922 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 307 transitions. [2021-11-12 23:40:15,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-12 23:40:15,925 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:40:15,925 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:40:15,940 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-12 23:40:16,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:40:16,140 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:40:16,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:40:16,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1790395171, now seen corresponding path program 1 times [2021-11-12 23:40:16,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:40:16,142 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [928392304] [2021-11-12 23:40:16,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:40:16,142 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:40:16,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:40:16,143 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:40:16,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 23:40:16,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:40:16,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:40:16,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:40:16,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:40:16,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:40:16,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:40:16,715 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:40:16,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [928392304] [2021-11-12 23:40:16,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [928392304] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:40:16,716 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:40:16,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-12 23:40:16,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133055255] [2021-11-12 23:40:16,717 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:40:16,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:40:16,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:40:16,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:40:16,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:40:16,720 INFO L87 Difference]: Start difference. First operand 222 states and 307 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:40:16,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:40:16,912 INFO L93 Difference]: Finished difference Result 355 states and 499 transitions. [2021-11-12 23:40:16,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:40:16,913 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 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 44 [2021-11-12 23:40:16,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:40:16,916 INFO L225 Difference]: With dead ends: 355 [2021-11-12 23:40:16,916 INFO L226 Difference]: Without dead ends: 231 [2021-11-12 23:40:16,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:40:16,919 INFO L933 BasicCegarLoop]: 283 mSDtfsCounter, 187 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 117.73ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 754 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.29ms SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 142.38ms IncrementalHoareTripleChecker+Time [2021-11-12 23:40:16,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 754 Invalid, 76 Unknown, 0 Unchecked, 8.29ms Time], IncrementalHoareTripleChecker [38 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 142.38ms Time] [2021-11-12 23:40:16,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-11-12 23:40:16,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 225. [2021-11-12 23:40:16,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 200 states have (on average 1.31) internal successors, (262), 216 states have internal predecessors, (262), 20 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (20), 6 states have call predecessors, (20), 20 states have call successors, (20) [2021-11-12 23:40:16,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 302 transitions. [2021-11-12 23:40:16,945 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 302 transitions. Word has length 44 [2021-11-12 23:40:16,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:40:16,946 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 302 transitions. [2021-11-12 23:40:16,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:40:16,946 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 302 transitions. [2021-11-12 23:40:16,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-12 23:40:16,949 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:40:16,949 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:40:16,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 23:40:17,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:40:17,172 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:40:17,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:40:17,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1417019415, now seen corresponding path program 1 times [2021-11-12 23:40:17,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:40:17,173 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1279989622] [2021-11-12 23:40:17,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:40:17,173 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:40:17,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:40:17,174 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:40:17,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 23:40:17,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:40:17,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:40:17,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:40:17,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:40:17,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:40:17,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:40:17,622 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-12 23:40:17,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 36 [2021-11-12 23:40:17,725 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-12 23:40:17,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 23 [2021-11-12 23:40:17,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:40:17,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:40:18,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:40:18,081 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:40:18,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1279989622] [2021-11-12 23:40:18,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1279989622] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:40:18,083 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:40:18,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 23:40:18,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385328641] [2021-11-12 23:40:18,084 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:40:18,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:40:18,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:40:18,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:40:18,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:40:18,088 INFO L87 Difference]: Start difference. First operand 225 states and 302 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:40:23,053 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:40:27,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:40:27,160 INFO L93 Difference]: Finished difference Result 552 states and 724 transitions. [2021-11-12 23:40:27,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:40:27,163 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 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 44 [2021-11-12 23:40:27,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:40:27,166 INFO L225 Difference]: With dead ends: 552 [2021-11-12 23:40:27,166 INFO L226 Difference]: Without dead ends: 424 [2021-11-12 23:40:27,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:40:27,169 INFO L933 BasicCegarLoop]: 272 mSDtfsCounter, 216 mSDsluCounter, 791 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8694.81ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 1063 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.99ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8982.69ms IncrementalHoareTripleChecker+Time [2021-11-12 23:40:27,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 1063 Invalid, 231 Unknown, 0 Unchecked, 9.99ms Time], IncrementalHoareTripleChecker [4 Valid, 226 Invalid, 1 Unknown, 0 Unchecked, 8982.69ms Time] [2021-11-12 23:40:27,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-11-12 23:40:27,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 227. [2021-11-12 23:40:27,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 202 states have (on average 1.306930693069307) internal successors, (264), 218 states have internal predecessors, (264), 20 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (20), 6 states have call predecessors, (20), 20 states have call successors, (20) [2021-11-12 23:40:27,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 304 transitions. [2021-11-12 23:40:27,200 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 304 transitions. Word has length 44 [2021-11-12 23:40:27,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:40:27,201 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 304 transitions. [2021-11-12 23:40:27,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:40:27,201 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 304 transitions. [2021-11-12 23:40:27,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-12 23:40:27,204 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:40:27,204 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:40:27,220 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-12 23:40:27,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:40:27,419 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:40:27,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:40:27,419 INFO L85 PathProgramCache]: Analyzing trace with hash 385113170, now seen corresponding path program 1 times [2021-11-12 23:40:27,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:40:27,421 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2132421233] [2021-11-12 23:40:27,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:40:27,421 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:40:27,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:40:27,422 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:40:27,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 23:40:27,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:40:27,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:40:27,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:40:27,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:40:27,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:40:28,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:40:28,132 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:40:28,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2132421233] [2021-11-12 23:40:28,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2132421233] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:40:28,133 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:40:28,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-12 23:40:28,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499525790] [2021-11-12 23:40:28,133 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:40:28,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:40:28,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:40:28,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:40:28,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:40:28,135 INFO L87 Difference]: Start difference. First operand 227 states and 304 transitions. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:40:28,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:40:28,309 INFO L93 Difference]: Finished difference Result 459 states and 616 transitions. [2021-11-12 23:40:28,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:40:28,311 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-12 23:40:28,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:40:28,319 INFO L225 Difference]: With dead ends: 459 [2021-11-12 23:40:28,320 INFO L226 Difference]: Without dead ends: 236 [2021-11-12 23:40:28,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:40:28,325 INFO L933 BasicCegarLoop]: 272 mSDtfsCounter, 202 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 114.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 703 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.85ms SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 133.34ms IncrementalHoareTripleChecker+Time [2021-11-12 23:40:28,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 703 Invalid, 68 Unknown, 0 Unchecked, 4.85ms Time], IncrementalHoareTripleChecker [31 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 133.34ms Time] [2021-11-12 23:40:28,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-11-12 23:40:28,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 230. [2021-11-12 23:40:28,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 205 states have (on average 1.2634146341463415) internal successors, (259), 221 states have internal predecessors, (259), 20 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (20), 6 states have call predecessors, (20), 20 states have call successors, (20) [2021-11-12 23:40:28,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 299 transitions. [2021-11-12 23:40:28,370 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 299 transitions. Word has length 61 [2021-11-12 23:40:28,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:40:28,372 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 299 transitions. [2021-11-12 23:40:28,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:40:28,374 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 299 transitions. [2021-11-12 23:40:28,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-12 23:40:28,382 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:40:28,382 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:40:28,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 23:40:28,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:40:28,596 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:40:28,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:40:28,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1958386564, now seen corresponding path program 1 times [2021-11-12 23:40:28,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:40:28,598 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [92899453] [2021-11-12 23:40:28,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:40:28,598 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:40:28,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:40:28,600 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:40:28,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 23:40:28,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:40:28,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:40:28,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:40:29,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:40:29,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:40:29,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:40:29,710 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:40:29,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [92899453] [2021-11-12 23:40:29,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [92899453] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:40:29,710 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:40:29,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 6] imperfect sequences [] total 8 [2021-11-12 23:40:29,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013498465] [2021-11-12 23:40:29,711 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:40:29,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:40:29,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:40:29,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:40:29,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:40:29,712 INFO L87 Difference]: Start difference. First operand 230 states and 299 transitions. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:40:29,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:40:29,921 INFO L93 Difference]: Finished difference Result 455 states and 593 transitions. [2021-11-12 23:40:29,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:40:29,922 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-12 23:40:29,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:40:29,925 INFO L225 Difference]: With dead ends: 455 [2021-11-12 23:40:29,925 INFO L226 Difference]: Without dead ends: 229 [2021-11-12 23:40:29,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:40:29,927 INFO L933 BasicCegarLoop]: 272 mSDtfsCounter, 358 mSDsluCounter, 852 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 157.20ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 1124 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.46ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 183.44ms IncrementalHoareTripleChecker+Time [2021-11-12 23:40:29,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [363 Valid, 1124 Invalid, 105 Unknown, 0 Unchecked, 5.46ms Time], IncrementalHoareTripleChecker [16 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 183.44ms Time] [2021-11-12 23:40:29,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-11-12 23:40:29,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 224. [2021-11-12 23:40:29,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 199 states have (on average 1.2512562814070352) internal successors, (249), 215 states have internal predecessors, (249), 20 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (20), 6 states have call predecessors, (20), 20 states have call successors, (20) [2021-11-12 23:40:29,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 289 transitions. [2021-11-12 23:40:29,943 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 289 transitions. Word has length 61 [2021-11-12 23:40:29,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:40:29,943 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 289 transitions. [2021-11-12 23:40:29,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:40:29,944 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 289 transitions. [2021-11-12 23:40:29,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-12 23:40:29,945 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:40:29,946 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:40:29,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 23:40:30,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:40:30,162 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:40:30,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:40:30,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1660994696, now seen corresponding path program 1 times [2021-11-12 23:40:30,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:40:30,164 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1928860432] [2021-11-12 23:40:30,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:40:30,164 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:40:30,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:40:30,167 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:40:30,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 23:40:30,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:40:30,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:40:30,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:40:30,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:40:30,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:40:31,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:40:31,331 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:40:31,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1928860432] [2021-11-12 23:40:31,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1928860432] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:40:31,331 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:40:31,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 23:40:31,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827241172] [2021-11-12 23:40:31,332 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:40:31,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:40:31,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:40:31,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:40:31,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:40:31,333 INFO L87 Difference]: Start difference. First operand 224 states and 289 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:40:32,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:40:32,230 INFO L93 Difference]: Finished difference Result 549 states and 694 transitions. [2021-11-12 23:40:32,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:40:32,231 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-12 23:40:32,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:40:32,234 INFO L225 Difference]: With dead ends: 549 [2021-11-12 23:40:32,235 INFO L226 Difference]: Without dead ends: 329 [2021-11-12 23:40:32,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:40:32,236 INFO L933 BasicCegarLoop]: 311 mSDtfsCounter, 79 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 826.06ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.92ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 872.95ms IncrementalHoareTripleChecker+Time [2021-11-12 23:40:32,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 561 Invalid, 34 Unknown, 0 Unchecked, 2.92ms Time], IncrementalHoareTripleChecker [5 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 872.95ms Time] [2021-11-12 23:40:32,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-11-12 23:40:32,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 326. [2021-11-12 23:40:32,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 300 states have (on average 1.21) internal successors, (363), 316 states have internal predecessors, (363), 21 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (21), 7 states have call predecessors, (21), 21 states have call successors, (21) [2021-11-12 23:40:32,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 405 transitions. [2021-11-12 23:40:32,257 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 405 transitions. Word has length 61 [2021-11-12 23:40:32,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:40:32,257 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 405 transitions. [2021-11-12 23:40:32,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:40:32,258 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 405 transitions. [2021-11-12 23:40:32,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-12 23:40:32,259 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:40:32,259 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:40:32,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 23:40:32,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:40:32,479 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:40:32,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:40:32,479 INFO L85 PathProgramCache]: Analyzing trace with hash -999436228, now seen corresponding path program 1 times [2021-11-12 23:40:32,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:40:32,481 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1447596505] [2021-11-12 23:40:32,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:40:32,481 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:40:32,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:40:32,482 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:40:32,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 23:40:32,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:40:32,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:40:32,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:40:32,994 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:40:32,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:40:33,254 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 23:40:33,254 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:40:33,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1447596505] [2021-11-12 23:40:33,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1447596505] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:40:33,255 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:40:33,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:40:33,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944837520] [2021-11-12 23:40:33,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:40:33,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:40:33,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:40:33,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:40:33,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:40:33,259 INFO L87 Difference]: Start difference. First operand 326 states and 405 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-12 23:40:33,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:40:33,330 INFO L93 Difference]: Finished difference Result 616 states and 777 transitions. [2021-11-12 23:40:33,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:40:33,331 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 76 [2021-11-12 23:40:33,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:40:33,335 INFO L225 Difference]: With dead ends: 616 [2021-11-12 23:40:33,335 INFO L226 Difference]: Without dead ends: 329 [2021-11-12 23:40:33,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:40:33,337 INFO L933 BasicCegarLoop]: 278 mSDtfsCounter, 2 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.66ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 830 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.64ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 38.39ms IncrementalHoareTripleChecker+Time [2021-11-12 23:40:33,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 830 Invalid, 13 Unknown, 0 Unchecked, 2.64ms Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 38.39ms Time] [2021-11-12 23:40:33,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-11-12 23:40:33,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 329. [2021-11-12 23:40:33,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 302 states have (on average 1.2119205298013245) internal successors, (366), 319 states have internal predecessors, (366), 21 states have call successors, (21), 3 states have call predecessors, (21), 4 states have return successors, (22), 7 states have call predecessors, (22), 21 states have call successors, (22) [2021-11-12 23:40:33,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 409 transitions. [2021-11-12 23:40:33,358 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 409 transitions. Word has length 76 [2021-11-12 23:40:33,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:40:33,359 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 409 transitions. [2021-11-12 23:40:33,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-12 23:40:33,359 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 409 transitions. [2021-11-12 23:40:33,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-12 23:40:33,361 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:40:33,361 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:40:33,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 23:40:33,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:40:33,579 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:40:33,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:40:33,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1611628322, now seen corresponding path program 1 times [2021-11-12 23:40:33,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:40:33,580 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [207000258] [2021-11-12 23:40:33,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:40:33,581 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:40:33,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:40:33,582 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:40:33,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 23:40:33,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:40:33,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:40:33,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:40:34,095 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 23:40:34,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:40:34,381 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 23:40:34,381 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:40:34,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [207000258] [2021-11-12 23:40:34,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [207000258] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:40:34,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1294948549] [2021-11-12 23:40:34,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:40:34,382 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:40:34,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:40:34,387 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:40:34,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-12 23:40:34,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:40:34,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:40:34,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:40:35,059 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 23:40:35,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:40:35,277 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 23:40:35,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1294948549] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:40:35,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594141177] [2021-11-12 23:40:35,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:40:35,278 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:40:35,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:40:35,279 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:40:35,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-12 23:40:35,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:40:35,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:40:35,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:40:35,641 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 23:40:35,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:40:35,943 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 23:40:35,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594141177] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:40:35,944 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:40:35,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 11 [2021-11-12 23:40:35,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105854540] [2021-11-12 23:40:35,944 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:40:35,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:40:35,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:40:35,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:40:35,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:40:35,946 INFO L87 Difference]: Start difference. First operand 329 states and 409 transitions. Second operand has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 2 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-12 23:40:36,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:40:36,450 INFO L93 Difference]: Finished difference Result 634 states and 805 transitions. [2021-11-12 23:40:36,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-12 23:40:36,453 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 2 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 78 [2021-11-12 23:40:36,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:40:36,457 INFO L225 Difference]: With dead ends: 634 [2021-11-12 23:40:36,457 INFO L226 Difference]: Without dead ends: 344 [2021-11-12 23:40:36,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 453 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2021-11-12 23:40:36,461 INFO L933 BasicCegarLoop]: 278 mSDtfsCounter, 49 mSDsluCounter, 1369 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 193.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 1647 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.95ms SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 216.92ms IncrementalHoareTripleChecker+Time [2021-11-12 23:40:36,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 1647 Invalid, 103 Unknown, 0 Unchecked, 9.95ms Time], IncrementalHoareTripleChecker [35 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 216.92ms Time] [2021-11-12 23:40:36,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-11-12 23:40:36,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 340. [2021-11-12 23:40:36,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 312 states have (on average 1.2307692307692308) internal successors, (384), 329 states have internal predecessors, (384), 21 states have call successors, (21), 4 states have call predecessors, (21), 5 states have return successors, (22), 7 states have call predecessors, (22), 21 states have call successors, (22) [2021-11-12 23:40:36,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 427 transitions. [2021-11-12 23:40:36,487 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 427 transitions. Word has length 78 [2021-11-12 23:40:36,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:40:36,487 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 427 transitions. [2021-11-12 23:40:36,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 2 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-12 23:40:36,488 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 427 transitions. [2021-11-12 23:40:36,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-12 23:40:36,495 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:40:36,495 INFO L514 BasicCegarLoop]: trace histogram [8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:40:36,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-12 23:40:36,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 23:40:36,924 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-11-12 23:40:37,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:40:37,099 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:40:37,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:40:37,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1394113212, now seen corresponding path program 2 times [2021-11-12 23:40:37,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:40:37,100 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [108276523] [2021-11-12 23:40:37,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:40:37,101 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:40:37,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:40:37,102 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:40:37,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 23:40:38,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 23:40:38,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:40:39,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:40:39,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:40:39,255 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-12 23:40:39,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:40:39,696 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:40:39,696 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:40:39,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [108276523] [2021-11-12 23:40:39,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [108276523] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:40:39,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1384141409] [2021-11-12 23:40:39,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:40:39,697 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:40:39,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:40:39,698 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:40:39,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-12 23:40:44,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 23:40:44,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:40:44,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:40:44,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:40:44,321 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-12 23:40:44,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:40:44,578 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:40:44,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1384141409] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:40:44,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735781296] [2021-11-12 23:40:44,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:40:44,579 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:40:44,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:40:44,581 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:40:44,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-12 23:49:00,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 23:49:00,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:49:00,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:49:00,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:49:00,688 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:49:00,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:49:01,296 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:49:01,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735781296] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:49:01,296 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:49:01,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 22 [2021-11-12 23:49:01,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289753451] [2021-11-12 23:49:01,297 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:49:01,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-12 23:49:01,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:49:01,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-12 23:49:01,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=325, Unknown=0, NotChecked=0, Total=462 [2021-11-12 23:49:01,299 INFO L87 Difference]: Start difference. First operand 340 states and 427 transitions. Second operand has 22 states, 22 states have (on average 4.454545454545454) internal successors, (98), 22 states have internal predecessors, (98), 2 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-12 23:49:03,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:49:03,543 INFO L93 Difference]: Finished difference Result 667 states and 855 transitions. [2021-11-12 23:49:03,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-12 23:49:03,544 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.454545454545454) internal successors, (98), 22 states have internal predecessors, (98), 2 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 84 [2021-11-12 23:49:03,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:49:03,548 INFO L225 Difference]: With dead ends: 667 [2021-11-12 23:49:03,548 INFO L226 Difference]: Without dead ends: 360 [2021-11-12 23:49:03,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 525 GetRequests, 478 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=678, Invalid=1674, Unknown=0, NotChecked=0, Total=2352 [2021-11-12 23:49:03,551 INFO L933 BasicCegarLoop]: 281 mSDtfsCounter, 214 mSDsluCounter, 2751 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 658.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 3032 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.88ms SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 774.49ms IncrementalHoareTripleChecker+Time [2021-11-12 23:49:03,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 3032 Invalid, 374 Unknown, 0 Unchecked, 11.88ms Time], IncrementalHoareTripleChecker [109 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 774.49ms Time] [2021-11-12 23:49:03,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-11-12 23:49:03,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 352. [2021-11-12 23:49:03,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 324 states have (on average 1.2376543209876543) internal successors, (401), 341 states have internal predecessors, (401), 21 states have call successors, (21), 4 states have call predecessors, (21), 5 states have return successors, (22), 7 states have call predecessors, (22), 21 states have call successors, (22) [2021-11-12 23:49:03,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 444 transitions. [2021-11-12 23:49:03,573 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 444 transitions. Word has length 84 [2021-11-12 23:49:03,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:49:03,574 INFO L470 AbstractCegarLoop]: Abstraction has 352 states and 444 transitions. [2021-11-12 23:49:03,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.454545454545454) internal successors, (98), 22 states have internal predecessors, (98), 2 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-12 23:49:03,574 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 444 transitions. [2021-11-12 23:49:03,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-12 23:49:03,575 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:49:03,576 INFO L514 BasicCegarLoop]: trace histogram [20, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:49:03,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-12 23:49:03,842 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-12 23:49:03,990 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-11-12 23:49:04,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:49:04,177 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:49:04,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:49:04,177 INFO L85 PathProgramCache]: Analyzing trace with hash 2021540476, now seen corresponding path program 3 times [2021-11-12 23:49:04,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:49:04,178 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [995826695] [2021-11-12 23:49:04,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:49:04,178 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:49:04,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:49:04,179 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:49:04,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-12 23:49:07,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-12 23:49:07,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:49:07,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-12 23:49:07,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:49:07,819 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 123 proven. 55 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-12 23:49:07,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:49:09,085 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 123 proven. 55 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-12 23:49:09,086 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:49:09,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [995826695] [2021-11-12 23:49:09,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [995826695] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:49:09,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [217381351] [2021-11-12 23:49:09,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:49:09,086 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:49:09,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:49:09,087 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:49:09,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-12 23:49:43,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-12 23:49:43,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:49:43,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-12 23:49:43,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:49:44,038 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 123 proven. 55 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-12 23:49:44,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:49:44,493 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 123 proven. 55 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-12 23:49:44,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [217381351] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:49:44,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949076396] [2021-11-12 23:49:44,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:49:44,494 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:49:44,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:49:44,495 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:49:44,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dafddd3-abc5-4ae1-a6f7-ab6094fb758d/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process