./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product03.cil.c --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_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/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_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product03.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/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_add432c4-2a13-4c71-aae9-38287391bc1a/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 ec740d4c0b0b941516a7691cfe22f258e1a0e4fdd205bb4a0c04151c297a8c86 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:56:12,351 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:56:12,353 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:56:12,388 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:56:12,389 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:56:12,394 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:56:12,398 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:56:12,402 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:56:12,405 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:56:12,413 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:56:12,414 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:56:12,415 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:56:12,416 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:56:12,419 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:56:12,421 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:56:12,427 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:56:12,429 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:56:12,430 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:56:12,436 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:56:12,441 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:56:12,449 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:56:12,450 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:56:12,452 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:56:12,454 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:56:12,461 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:56:12,462 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:56:12,462 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:56:12,464 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:56:12,465 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:56:12,466 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:56:12,467 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:56:12,468 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:56:12,471 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:56:12,472 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:56:12,474 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:56:12,474 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:56:12,475 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:56:12,475 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:56:12,476 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:56:12,477 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:56:12,477 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:56:12,478 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 22:56:12,525 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:56:12,525 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:56:12,527 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:56:12,527 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:56:12,527 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:56:12,527 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:56:12,528 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:56:12,528 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 22:56:12,528 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:56:12,528 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:56:12,530 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 22:56:12,530 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 22:56:12,530 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:56:12,530 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 22:56:12,531 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 22:56:12,531 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 22:56:12,532 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:56:12,532 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:56:12,533 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 22:56:12,533 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:56:12,533 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:56:12,533 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:56:12,534 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:56:12,534 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:56:12,534 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:56:12,534 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:56:12,535 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:56:12,535 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:56:12,535 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:56:12,535 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:56:12,536 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:56:12,536 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:56:12,536 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:56:12,537 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:56:12,537 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:56:12,537 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 22:56:12,537 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 22:56:12,538 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:56:12,538 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:56:12,538 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:56:12,538 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_add432c4-2a13-4c71-aae9-38287391bc1a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ec740d4c0b0b941516a7691cfe22f258e1a0e4fdd205bb4a0c04151c297a8c86 [2021-11-12 22:56:12,853 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:56:12,890 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:56:12,893 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:56:12,895 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:56:12,896 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:56:12,897 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec3_product03.cil.c [2021-11-12 22:56:12,981 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/data/70b4b86c5/5491dedd0d144cb79fd670e85c51280d/FLAG65601cd09 [2021-11-12 22:56:13,699 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:56:13,700 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/sv-benchmarks/c/product-lines/elevator_spec3_product03.cil.c [2021-11-12 22:56:13,721 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/data/70b4b86c5/5491dedd0d144cb79fd670e85c51280d/FLAG65601cd09 [2021-11-12 22:56:13,865 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/data/70b4b86c5/5491dedd0d144cb79fd670e85c51280d [2021-11-12 22:56:13,868 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:56:13,871 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:56:13,876 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:56:13,877 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:56:13,880 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:56:13,882 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:56:13" (1/1) ... [2021-11-12 22:56:13,883 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f74c36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:56:13, skipping insertion in model container [2021-11-12 22:56:13,884 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:56:13" (1/1) ... [2021-11-12 22:56:13,891 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:56:13,993 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:56:14,466 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_add432c4-2a13-4c71-aae9-38287391bc1a/sv-benchmarks/c/product-lines/elevator_spec3_product03.cil.c[33356,33369] [2021-11-12 22:56:14,633 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:56:14,655 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 22:56:14,656 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1576d002 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:56:14, skipping insertion in model container [2021-11-12 22:56:14,656 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:56:14,657 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 22:56:14,660 INFO L158 Benchmark]: Toolchain (without parser) took 787.15ms. Allocated memory was 94.4MB in the beginning and 117.4MB in the end (delta: 23.1MB). Free memory was 56.1MB in the beginning and 76.9MB in the end (delta: -20.8MB). Peak memory consumption was 8.5MB. Max. memory is 16.1GB. [2021-11-12 22:56:14,662 INFO L158 Benchmark]: CDTParser took 0.37ms. Allocated memory is still 94.4MB. Free memory was 64.2MB in the beginning and 64.2MB in the end (delta: 27.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:56:14,664 INFO L158 Benchmark]: CACSL2BoogieTranslator took 780.64ms. Allocated memory was 94.4MB in the beginning and 117.4MB in the end (delta: 23.1MB). Free memory was 55.8MB in the beginning and 76.9MB in the end (delta: -21.1MB). Peak memory consumption was 8.5MB. Max. memory is 16.1GB. [2021-11-12 22:56:14,668 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37ms. Allocated memory is still 94.4MB. Free memory was 64.2MB in the beginning and 64.2MB in the end (delta: 27.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 780.64ms. Allocated memory was 94.4MB in the beginning and 117.4MB in the end (delta: 23.1MB). Free memory was 55.8MB in the beginning and 76.9MB in the end (delta: -21.1MB). Peak memory consumption was 8.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 77]: 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_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/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_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product03.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/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_add432c4-2a13-4c71-aae9-38287391bc1a/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 ec740d4c0b0b941516a7691cfe22f258e1a0e4fdd205bb4a0c04151c297a8c86 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:56:16,977 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:56:16,980 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:56:17,031 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:56:17,032 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:56:17,037 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:56:17,039 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:56:17,043 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:56:17,047 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:56:17,054 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:56:17,056 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:56:17,058 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:56:17,058 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:56:17,061 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:56:17,063 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:56:17,067 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:56:17,068 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:56:17,070 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:56:17,072 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:56:17,079 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:56:17,081 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:56:17,082 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:56:17,085 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:56:17,088 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:56:17,097 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:56:17,098 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:56:17,099 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:56:17,101 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:56:17,101 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:56:17,103 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:56:17,103 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:56:17,104 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:56:17,106 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:56:17,107 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:56:17,108 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:56:17,109 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:56:17,110 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:56:17,110 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:56:17,110 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:56:17,112 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:56:17,113 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:56:17,114 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 22:56:17,153 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:56:17,153 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:56:17,155 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:56:17,155 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:56:17,155 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:56:17,155 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:56:17,156 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:56:17,156 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:56:17,156 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:56:17,156 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:56:17,159 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:56:17,159 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:56:17,159 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:56:17,159 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:56:17,160 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:56:17,160 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:56:17,160 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:56:17,160 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:56:17,160 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 22:56:17,161 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 22:56:17,161 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:56:17,161 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:56:17,161 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:56:17,162 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:56:17,162 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:56:17,162 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 22:56:17,162 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:56:17,163 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:56:17,163 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:56:17,163 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:56:17,163 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:56:17,163 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 22:56:17,164 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 22:56:17,164 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:56:17,165 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:56:17,165 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:56:17,165 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_add432c4-2a13-4c71-aae9-38287391bc1a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ec740d4c0b0b941516a7691cfe22f258e1a0e4fdd205bb4a0c04151c297a8c86 [2021-11-12 22:56:17,596 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:56:17,631 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:56:17,637 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:56:17,639 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:56:17,639 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:56:17,642 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec3_product03.cil.c [2021-11-12 22:56:17,738 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/data/e551c43b5/4ed39f22a598428f939bcb1843f335a8/FLAG2b5c6c260 [2021-11-12 22:56:18,414 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:56:18,415 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/sv-benchmarks/c/product-lines/elevator_spec3_product03.cil.c [2021-11-12 22:56:18,464 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/data/e551c43b5/4ed39f22a598428f939bcb1843f335a8/FLAG2b5c6c260 [2021-11-12 22:56:18,673 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/data/e551c43b5/4ed39f22a598428f939bcb1843f335a8 [2021-11-12 22:56:18,676 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:56:18,678 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:56:18,683 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:56:18,683 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:56:18,687 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:56:18,689 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:56:18" (1/1) ... [2021-11-12 22:56:18,690 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e6e455c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:56:18, skipping insertion in model container [2021-11-12 22:56:18,691 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:56:18" (1/1) ... [2021-11-12 22:56:18,700 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:56:18,804 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:56:19,246 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_add432c4-2a13-4c71-aae9-38287391bc1a/sv-benchmarks/c/product-lines/elevator_spec3_product03.cil.c[33356,33369] [2021-11-12 22:56:19,444 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:56:19,460 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 22:56:19,485 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:56:19,573 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_add432c4-2a13-4c71-aae9-38287391bc1a/sv-benchmarks/c/product-lines/elevator_spec3_product03.cil.c[33356,33369] [2021-11-12 22:56:19,678 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:56:19,687 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:56:19,748 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_add432c4-2a13-4c71-aae9-38287391bc1a/sv-benchmarks/c/product-lines/elevator_spec3_product03.cil.c[33356,33369] [2021-11-12 22:56:19,835 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:56:19,885 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:56:19,885 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:56:19 WrapperNode [2021-11-12 22:56:19,886 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:56:19,887 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:56:19,887 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:56:19,887 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:56:19,895 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:56:19" (1/1) ... [2021-11-12 22:56:19,956 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:56:19" (1/1) ... [2021-11-12 22:56:20,038 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:56:20,047 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:56:20,047 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:56:20,047 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:56:20,054 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:56:19" (1/1) ... [2021-11-12 22:56:20,055 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:56:19" (1/1) ... [2021-11-12 22:56:20,060 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:56:19" (1/1) ... [2021-11-12 22:56:20,061 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:56:19" (1/1) ... [2021-11-12 22:56:20,089 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:56:19" (1/1) ... [2021-11-12 22:56:20,107 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:56:19" (1/1) ... [2021-11-12 22:56:20,115 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:56:19" (1/1) ... [2021-11-12 22:56:20,127 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:56:20,128 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:56:20,128 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:56:20,128 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:56:20,129 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:56:19" (1/1) ... [2021-11-12 22:56:20,136 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:56:20,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:56:20,159 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:56:20,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:56:20,253 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2021-11-12 22:56:20,255 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2021-11-12 22:56:20,255 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:56:20,256 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-12 22:56:20,256 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-12 22:56:20,256 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-12 22:56:20,256 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-12 22:56:20,256 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-12 22:56:20,256 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-12 22:56:20,257 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2021-11-12 22:56:20,257 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2021-11-12 22:56:20,257 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-12 22:56:20,257 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-12 22:56:20,257 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-12 22:56:20,257 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-12 22:56:20,257 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-12 22:56:20,258 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-12 22:56:20,258 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-12 22:56:20,258 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-12 22:56:20,258 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-12 22:56:20,258 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-12 22:56:20,258 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-12 22:56:20,259 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-12 22:56:20,259 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-12 22:56:20,259 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-12 22:56:20,259 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 22:56:20,259 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-12 22:56:20,259 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-12 22:56:20,260 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2021-11-12 22:56:20,260 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2021-11-12 22:56:20,260 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-12 22:56:20,261 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-12 22:56:20,261 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2021-11-12 22:56:20,261 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2021-11-12 22:56:20,261 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-12 22:56:20,261 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-12 22:56:20,262 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-12 22:56:20,262 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-12 22:56:20,262 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-12 22:56:20,262 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-12 22:56:20,262 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-12 22:56:20,263 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-12 22:56:20,263 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__base [2021-11-12 22:56:20,263 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__base [2021-11-12 22:56:20,263 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-12 22:56:20,263 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-12 22:56:20,263 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-12 22:56:20,264 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-12 22:56:20,264 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-12 22:56:20,265 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-12 22:56:20,265 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-12 22:56:20,266 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-12 22:56:20,267 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:56:20,267 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:56:20,267 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-12 22:56:20,267 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-12 22:56:24,288 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:56:24,288 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 22:56:24,291 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:56:24 BoogieIcfgContainer [2021-11-12 22:56:24,291 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:56:24,293 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:56:24,294 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:56:24,296 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:56:24,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:56:18" (1/3) ... [2021-11-12 22:56:24,297 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27481d0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:56:24, skipping insertion in model container [2021-11-12 22:56:24,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:56:19" (2/3) ... [2021-11-12 22:56:24,298 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27481d0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:56:24, skipping insertion in model container [2021-11-12 22:56:24,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:56:24" (3/3) ... [2021-11-12 22:56:24,300 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product03.cil.c [2021-11-12 22:56:24,305 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:56:24,305 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 22:56:24,358 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:56:24,364 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 22:56:24,365 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 22:56:24,396 INFO L276 IsEmpty]: Start isEmpty. Operand has 574 states, 440 states have (on average 1.6727272727272726) internal successors, (736), 458 states have internal predecessors, (736), 106 states have call successors, (106), 26 states have call predecessors, (106), 26 states have return successors, (106), 103 states have call predecessors, (106), 106 states have call successors, (106) [2021-11-12 22:56:24,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-12 22:56:24,426 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:56:24,427 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:56:24,428 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:56:24,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:56:24,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1064458506, now seen corresponding path program 1 times [2021-11-12 22:56:24,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:56:24,472 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [394703981] [2021-11-12 22:56:24,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:56:24,473 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:56:24,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:56:24,477 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:56:24,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 22:56:25,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:56:25,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 914 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:56:25,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:56:25,656 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:56:25,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:56:26,199 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:56:26,200 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:56:26,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [394703981] [2021-11-12 22:56:26,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [394703981] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:56:26,201 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:56:26,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 22:56:26,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65008103] [2021-11-12 22:56:26,203 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:56:26,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 22:56:26,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:56:26,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 22:56:26,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:56:26,241 INFO L87 Difference]: Start difference. First operand has 574 states, 440 states have (on average 1.6727272727272726) internal successors, (736), 458 states have internal predecessors, (736), 106 states have call successors, (106), 26 states have call predecessors, (106), 26 states have return successors, (106), 103 states have call predecessors, (106), 106 states have call successors, (106) Second operand has 11 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-12 22:56:26,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:56:26,594 INFO L93 Difference]: Finished difference Result 1151 states and 1917 transitions. [2021-11-12 22:56:26,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 22:56:26,597 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) Word has length 113 [2021-11-12 22:56:26,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:56:26,617 INFO L225 Difference]: With dead ends: 1151 [2021-11-12 22:56:26,617 INFO L226 Difference]: Without dead ends: 585 [2021-11-12 22:56:26,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:56:26,635 INFO L933 BasicCegarLoop]: 933 mSDtfsCounter, 118 mSDsluCounter, 5500 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 156.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 6433 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 30.88ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 177.45ms IncrementalHoareTripleChecker+Time [2021-11-12 22:56:26,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 6433 Invalid, 106 Unknown, 0 Unchecked, 30.88ms Time], IncrementalHoareTripleChecker [4 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 177.45ms Time] [2021-11-12 22:56:26,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-11-12 22:56:26,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 577. [2021-11-12 22:56:26,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 443 states have (on average 1.6636568848758464) internal successors, (737), 461 states have internal predecessors, (737), 107 states have call successors, (107), 26 states have call predecessors, (107), 26 states have return successors, (106), 102 states have call predecessors, (106), 104 states have call successors, (106) [2021-11-12 22:56:26,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 950 transitions. [2021-11-12 22:56:26,802 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 950 transitions. Word has length 113 [2021-11-12 22:56:26,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:56:26,803 INFO L470 AbstractCegarLoop]: Abstraction has 577 states and 950 transitions. [2021-11-12 22:56:26,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-12 22:56:26,803 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 950 transitions. [2021-11-12 22:56:26,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-12 22:56:26,813 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:56:26,814 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:56:26,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 22:56:27,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:56:27,031 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:56:27,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:56:27,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1244322680, now seen corresponding path program 1 times [2021-11-12 22:56:27,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:56:27,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1370239698] [2021-11-12 22:56:27,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:56:27,033 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:56:27,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:56:27,035 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:56:27,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 22:56:27,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:56:27,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 915 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:56:27,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:56:27,983 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:56:27,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:56:28,479 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:56:28,480 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:56:28,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1370239698] [2021-11-12 22:56:28,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1370239698] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:56:28,481 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:56:28,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 22:56:28,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160414024] [2021-11-12 22:56:28,487 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:56:28,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 22:56:28,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:56:28,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 22:56:28,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:56:28,493 INFO L87 Difference]: Start difference. First operand 577 states and 950 transitions. Second operand has 11 states, 9 states have (on average 11.11111111111111) internal successors, (100), 9 states have internal predecessors, (100), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-12 22:56:28,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:56:28,854 INFO L93 Difference]: Finished difference Result 1159 states and 1918 transitions. [2021-11-12 22:56:28,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 22:56:28,856 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 11.11111111111111) internal successors, (100), 9 states have internal predecessors, (100), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) Word has length 114 [2021-11-12 22:56:28,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:56:28,862 INFO L225 Difference]: With dead ends: 1159 [2021-11-12 22:56:28,862 INFO L226 Difference]: Without dead ends: 598 [2021-11-12 22:56:28,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:56:28,868 INFO L933 BasicCegarLoop]: 933 mSDtfsCounter, 175 mSDsluCounter, 6403 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 209.31ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 7336 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 19.98ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 240.27ms IncrementalHoareTripleChecker+Time [2021-11-12 22:56:28,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 7336 Invalid, 132 Unknown, 0 Unchecked, 19.98ms Time], IncrementalHoareTripleChecker [5 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 240.27ms Time] [2021-11-12 22:56:28,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2021-11-12 22:56:28,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 590. [2021-11-12 22:56:28,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 453 states have (on average 1.6600441501103753) internal successors, (752), 473 states have internal predecessors, (752), 108 states have call successors, (108), 26 states have call predecessors, (108), 28 states have return successors, (109), 103 states have call predecessors, (109), 105 states have call successors, (109) [2021-11-12 22:56:28,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 969 transitions. [2021-11-12 22:56:28,911 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 969 transitions. Word has length 114 [2021-11-12 22:56:28,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:56:28,911 INFO L470 AbstractCegarLoop]: Abstraction has 590 states and 969 transitions. [2021-11-12 22:56:28,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 11.11111111111111) internal successors, (100), 9 states have internal predecessors, (100), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-12 22:56:28,912 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 969 transitions. [2021-11-12 22:56:28,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-12 22:56:28,916 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:56:28,916 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:56:28,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 22:56:29,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:56:29,138 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:56:29,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:56:29,138 INFO L85 PathProgramCache]: Analyzing trace with hash 562107374, now seen corresponding path program 1 times [2021-11-12 22:56:29,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:56:29,140 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [266294101] [2021-11-12 22:56:29,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:56:29,140 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:56:29,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:56:29,141 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:56:29,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 22:56:29,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:56:29,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 916 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:56:29,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:56:30,048 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:56:30,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:56:30,552 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:56:30,552 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:56:30,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [266294101] [2021-11-12 22:56:30,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [266294101] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:56:30,553 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:56:30,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 22:56:30,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148768681] [2021-11-12 22:56:30,554 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:56:30,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 22:56:30,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:56:30,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 22:56:30,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:56:30,556 INFO L87 Difference]: Start difference. First operand 590 states and 969 transitions. Second operand has 11 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-12 22:56:30,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:56:30,885 INFO L93 Difference]: Finished difference Result 1185 states and 1957 transitions. [2021-11-12 22:56:30,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 22:56:30,887 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) Word has length 115 [2021-11-12 22:56:30,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:56:30,893 INFO L225 Difference]: With dead ends: 1185 [2021-11-12 22:56:30,893 INFO L226 Difference]: Without dead ends: 611 [2021-11-12 22:56:30,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:56:30,917 INFO L933 BasicCegarLoop]: 932 mSDtfsCounter, 103 mSDsluCounter, 7327 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 206.39ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 8259 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 20.20ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 232.89ms IncrementalHoareTripleChecker+Time [2021-11-12 22:56:30,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 8259 Invalid, 145 Unknown, 0 Unchecked, 20.20ms Time], IncrementalHoareTripleChecker [5 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 232.89ms Time] [2021-11-12 22:56:30,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2021-11-12 22:56:30,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 603. [2021-11-12 22:56:30,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 463 states have (on average 1.65658747300216) internal successors, (767), 485 states have internal predecessors, (767), 109 states have call successors, (109), 26 states have call predecessors, (109), 30 states have return successors, (112), 104 states have call predecessors, (112), 106 states have call successors, (112) [2021-11-12 22:56:30,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 988 transitions. [2021-11-12 22:56:30,964 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 988 transitions. Word has length 115 [2021-11-12 22:56:30,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:56:30,964 INFO L470 AbstractCegarLoop]: Abstraction has 603 states and 988 transitions. [2021-11-12 22:56:30,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-12 22:56:30,965 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 988 transitions. [2021-11-12 22:56:30,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-12 22:56:30,972 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:56:30,972 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:56:30,992 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-12 22:56:31,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:56:31,183 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:56:31,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:56:31,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1074768036, now seen corresponding path program 1 times [2021-11-12 22:56:31,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:56:31,184 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [166429933] [2021-11-12 22:56:31,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:56:31,185 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:56:31,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:56:31,190 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:56:31,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 22:56:31,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:56:31,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 917 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:56:31,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:56:32,028 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:56:32,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:56:32,495 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:56:32,495 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:56:32,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [166429933] [2021-11-12 22:56:32,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [166429933] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:56:32,496 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:56:32,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 22:56:32,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276231945] [2021-11-12 22:56:32,497 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:56:32,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 22:56:32,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:56:32,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 22:56:32,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:56:32,499 INFO L87 Difference]: Start difference. First operand 603 states and 988 transitions. Second operand has 11 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-12 22:56:32,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:56:32,803 INFO L93 Difference]: Finished difference Result 1207 states and 1990 transitions. [2021-11-12 22:56:32,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 22:56:32,804 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) Word has length 116 [2021-11-12 22:56:32,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:56:32,811 INFO L225 Difference]: With dead ends: 1207 [2021-11-12 22:56:32,811 INFO L226 Difference]: Without dead ends: 620 [2021-11-12 22:56:32,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:56:32,824 INFO L933 BasicCegarLoop]: 932 mSDtfsCounter, 171 mSDsluCounter, 6396 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 200.91ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 7328 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.23ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 221.49ms IncrementalHoareTripleChecker+Time [2021-11-12 22:56:32,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 7328 Invalid, 130 Unknown, 0 Unchecked, 15.23ms Time], IncrementalHoareTripleChecker [5 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 221.49ms Time] [2021-11-12 22:56:32,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2021-11-12 22:56:32,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 616. [2021-11-12 22:56:32,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 473 states have (on average 1.653276955602537) internal successors, (782), 497 states have internal predecessors, (782), 110 states have call successors, (110), 26 states have call predecessors, (110), 32 states have return successors, (115), 105 states have call predecessors, (115), 107 states have call successors, (115) [2021-11-12 22:56:32,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 1007 transitions. [2021-11-12 22:56:32,883 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 1007 transitions. Word has length 116 [2021-11-12 22:56:32,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:56:32,884 INFO L470 AbstractCegarLoop]: Abstraction has 616 states and 1007 transitions. [2021-11-12 22:56:32,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-12 22:56:32,885 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 1007 transitions. [2021-11-12 22:56:32,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-12 22:56:32,891 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:56:32,891 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:56:32,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 22:56:33,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:56:33,105 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:56:33,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:56:33,105 INFO L85 PathProgramCache]: Analyzing trace with hash -327107363, now seen corresponding path program 1 times [2021-11-12 22:56:33,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:56:33,106 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [345033342] [2021-11-12 22:56:33,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:56:33,107 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:56:33,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:56:33,108 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:56:33,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 22:56:33,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:56:33,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 916 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:56:33,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:56:33,946 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:56:33,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:56:34,423 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:56:34,423 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:56:34,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [345033342] [2021-11-12 22:56:34,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [345033342] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:56:34,424 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:56:34,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-12 22:56:34,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531599373] [2021-11-12 22:56:34,424 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:56:34,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:56:34,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:56:34,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:56:34,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:56:34,425 INFO L87 Difference]: Start difference. First operand 616 states and 1007 transitions. Second operand has 8 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 3 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2021-11-12 22:56:34,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:56:34,629 INFO L93 Difference]: Finished difference Result 1227 states and 2020 transitions. [2021-11-12 22:56:34,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:56:34,631 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 3 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) Word has length 116 [2021-11-12 22:56:34,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:56:34,639 INFO L225 Difference]: With dead ends: 1227 [2021-11-12 22:56:34,639 INFO L226 Difference]: Without dead ends: 627 [2021-11-12 22:56:34,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:56:34,646 INFO L933 BasicCegarLoop]: 921 mSDtfsCounter, 242 mSDsluCounter, 3625 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 111.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 4546 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.14ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 134.71ms IncrementalHoareTripleChecker+Time [2021-11-12 22:56:34,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 4546 Invalid, 77 Unknown, 0 Unchecked, 9.14ms Time], IncrementalHoareTripleChecker [4 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 134.71ms Time] [2021-11-12 22:56:34,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2021-11-12 22:56:34,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 625. [2021-11-12 22:56:34,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 481 states have (on average 1.6528066528066527) internal successors, (795), 506 states have internal predecessors, (795), 110 states have call successors, (110), 26 states have call predecessors, (110), 33 states have return successors, (119), 105 states have call predecessors, (119), 107 states have call successors, (119) [2021-11-12 22:56:34,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 1024 transitions. [2021-11-12 22:56:34,691 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 1024 transitions. Word has length 116 [2021-11-12 22:56:34,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:56:34,696 INFO L470 AbstractCegarLoop]: Abstraction has 625 states and 1024 transitions. [2021-11-12 22:56:34,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 3 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2021-11-12 22:56:34,696 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 1024 transitions. [2021-11-12 22:56:34,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-12 22:56:34,703 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:56:34,703 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:56:34,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 22:56:34,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:56:34,923 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:56:34,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:56:34,924 INFO L85 PathProgramCache]: Analyzing trace with hash 840397664, now seen corresponding path program 1 times [2021-11-12 22:56:34,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:56:34,924 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [431128534] [2021-11-12 22:56:34,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:56:34,925 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:56:34,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:56:34,926 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:56:34,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 22:56:35,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:56:35,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 918 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:56:35,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:56:35,616 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:56:35,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:56:35,957 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:56:35,958 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:56:35,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [431128534] [2021-11-12 22:56:35,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [431128534] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:56:35,958 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:56:35,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-12 22:56:35,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691968077] [2021-11-12 22:56:35,959 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:56:35,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:56:35,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:56:35,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:56:35,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:56:35,961 INFO L87 Difference]: Start difference. First operand 625 states and 1024 transitions. Second operand has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-12 22:56:36,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:56:36,036 INFO L93 Difference]: Finished difference Result 1226 states and 2013 transitions. [2021-11-12 22:56:36,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:56:36,037 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 117 [2021-11-12 22:56:36,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:56:36,042 INFO L225 Difference]: With dead ends: 1226 [2021-11-12 22:56:36,042 INFO L226 Difference]: Without dead ends: 535 [2021-11-12 22:56:36,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:56:36,048 INFO L933 BasicCegarLoop]: 919 mSDtfsCounter, 22 mSDsluCounter, 2746 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.82ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 3665 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.20ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.08ms IncrementalHoareTripleChecker+Time [2021-11-12 22:56:36,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 3665 Invalid, 21 Unknown, 0 Unchecked, 5.20ms Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 29.08ms Time] [2021-11-12 22:56:36,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-11-12 22:56:36,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 535. [2021-11-12 22:56:36,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 404 states have (on average 1.6287128712871286) internal successors, (658), 420 states have internal predecessors, (658), 106 states have call successors, (106), 26 states have call predecessors, (106), 24 states have return successors, (103), 101 states have call predecessors, (103), 103 states have call successors, (103) [2021-11-12 22:56:36,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 867 transitions. [2021-11-12 22:56:36,074 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 867 transitions. Word has length 117 [2021-11-12 22:56:36,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:56:36,075 INFO L470 AbstractCegarLoop]: Abstraction has 535 states and 867 transitions. [2021-11-12 22:56:36,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-12 22:56:36,075 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 867 transitions. [2021-11-12 22:56:36,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-12 22:56:36,078 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:56:36,079 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:56:36,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 22:56:36,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:56:36,300 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:56:36,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:56:36,301 INFO L85 PathProgramCache]: Analyzing trace with hash 2053631698, now seen corresponding path program 1 times [2021-11-12 22:56:36,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:56:36,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1160875410] [2021-11-12 22:56:36,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:56:36,302 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:56:36,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:56:36,302 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:56:36,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 22:56:36,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:56:36,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 918 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:56:36,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:56:37,116 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:56:37,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:56:37,606 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:56:37,606 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:56:37,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1160875410] [2021-11-12 22:56:37,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1160875410] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:56:37,606 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:56:37,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 22:56:37,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532727057] [2021-11-12 22:56:37,607 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:56:37,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 22:56:37,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:56:37,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 22:56:37,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:56:37,608 INFO L87 Difference]: Start difference. First operand 535 states and 867 transitions. Second operand has 13 states, 11 states have (on average 9.909090909090908) internal successors, (109), 11 states have internal predecessors, (109), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-12 22:56:37,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:56:37,842 INFO L93 Difference]: Finished difference Result 1057 states and 1722 transitions. [2021-11-12 22:56:37,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:56:37,843 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 9.909090909090908) internal successors, (109), 11 states have internal predecessors, (109), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) Word has length 117 [2021-11-12 22:56:37,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:56:37,854 INFO L225 Difference]: With dead ends: 1057 [2021-11-12 22:56:37,854 INFO L226 Difference]: Without dead ends: 535 [2021-11-12 22:56:37,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-12 22:56:37,860 INFO L933 BasicCegarLoop]: 849 mSDtfsCounter, 56 mSDsluCounter, 6750 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 131.85ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 7599 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.88ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 147.91ms IncrementalHoareTripleChecker+Time [2021-11-12 22:56:37,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 7599 Invalid, 133 Unknown, 0 Unchecked, 8.88ms Time], IncrementalHoareTripleChecker [1 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 147.91ms Time] [2021-11-12 22:56:37,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-11-12 22:56:37,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 535. [2021-11-12 22:56:37,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 404 states have (on average 1.6262376237623761) internal successors, (657), 420 states have internal predecessors, (657), 106 states have call successors, (106), 26 states have call predecessors, (106), 24 states have return successors, (103), 101 states have call predecessors, (103), 103 states have call successors, (103) [2021-11-12 22:56:37,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 866 transitions. [2021-11-12 22:56:37,889 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 866 transitions. Word has length 117 [2021-11-12 22:56:37,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:56:37,890 INFO L470 AbstractCegarLoop]: Abstraction has 535 states and 866 transitions. [2021-11-12 22:56:37,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 9.909090909090908) internal successors, (109), 11 states have internal predecessors, (109), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-12 22:56:37,890 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 866 transitions. [2021-11-12 22:56:37,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-12 22:56:37,894 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:56:37,895 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:56:37,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 22:56:38,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:56:38,113 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:56:38,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:56:38,114 INFO L85 PathProgramCache]: Analyzing trace with hash 466323196, now seen corresponding path program 1 times [2021-11-12 22:56:38,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:56:38,115 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [282276205] [2021-11-12 22:56:38,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:56:38,115 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:56:38,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:56:38,117 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:56:38,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 22:56:38,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:56:38,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 919 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:56:38,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:56:38,856 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:56:38,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:56:39,380 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:56:39,380 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:56:39,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [282276205] [2021-11-12 22:56:39,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [282276205] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:56:39,380 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:56:39,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 22:56:39,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983842617] [2021-11-12 22:56:39,381 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:56:39,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 22:56:39,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:56:39,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 22:56:39,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:56:39,383 INFO L87 Difference]: Start difference. First operand 535 states and 866 transitions. Second operand has 13 states, 11 states have (on average 10.090909090909092) internal successors, (111), 11 states have internal predecessors, (111), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-12 22:56:39,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:56:39,571 INFO L93 Difference]: Finished difference Result 1057 states and 1720 transitions. [2021-11-12 22:56:39,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:56:39,572 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 10.090909090909092) internal successors, (111), 11 states have internal predecessors, (111), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) Word has length 118 [2021-11-12 22:56:39,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:56:39,577 INFO L225 Difference]: With dead ends: 1057 [2021-11-12 22:56:39,577 INFO L226 Difference]: Without dead ends: 535 [2021-11-12 22:56:39,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-12 22:56:39,583 INFO L933 BasicCegarLoop]: 849 mSDtfsCounter, 63 mSDsluCounter, 6762 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 102.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 7611 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.93ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 114.63ms IncrementalHoareTripleChecker+Time [2021-11-12 22:56:39,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 7611 Invalid, 130 Unknown, 0 Unchecked, 7.93ms Time], IncrementalHoareTripleChecker [0 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 114.63ms Time] [2021-11-12 22:56:39,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-11-12 22:56:39,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 535. [2021-11-12 22:56:39,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 404 states have (on average 1.6237623762376239) internal successors, (656), 420 states have internal predecessors, (656), 106 states have call successors, (106), 26 states have call predecessors, (106), 24 states have return successors, (103), 101 states have call predecessors, (103), 103 states have call successors, (103) [2021-11-12 22:56:39,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 865 transitions. [2021-11-12 22:56:39,608 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 865 transitions. Word has length 118 [2021-11-12 22:56:39,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:56:39,609 INFO L470 AbstractCegarLoop]: Abstraction has 535 states and 865 transitions. [2021-11-12 22:56:39,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 10.090909090909092) internal successors, (111), 11 states have internal predecessors, (111), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-12 22:56:39,609 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 865 transitions. [2021-11-12 22:56:39,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-12 22:56:39,612 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:56:39,613 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:56:39,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 22:56:39,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:56:39,832 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:56:39,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:56:39,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1048123287, now seen corresponding path program 1 times [2021-11-12 22:56:39,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:56:39,833 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [448408473] [2021-11-12 22:56:39,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:56:39,833 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:56:39,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:56:39,834 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:56:39,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 22:56:40,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:56:40,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 920 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:56:40,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:56:40,573 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:56:40,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:56:41,073 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:56:41,074 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:56:41,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [448408473] [2021-11-12 22:56:41,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [448408473] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:56:41,074 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:56:41,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 22:56:41,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945311232] [2021-11-12 22:56:41,075 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:56:41,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 22:56:41,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:56:41,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 22:56:41,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:56:41,077 INFO L87 Difference]: Start difference. First operand 535 states and 865 transitions. Second operand has 13 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-12 22:56:41,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:56:41,286 INFO L93 Difference]: Finished difference Result 1057 states and 1718 transitions. [2021-11-12 22:56:41,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:56:41,287 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) Word has length 119 [2021-11-12 22:56:41,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:56:41,292 INFO L225 Difference]: With dead ends: 1057 [2021-11-12 22:56:41,293 INFO L226 Difference]: Without dead ends: 535 [2021-11-12 22:56:41,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-12 22:56:41,298 INFO L933 BasicCegarLoop]: 849 mSDtfsCounter, 35 mSDsluCounter, 7594 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 103.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 8443 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.89ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 140.91ms IncrementalHoareTripleChecker+Time [2021-11-12 22:56:41,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 8443 Invalid, 126 Unknown, 0 Unchecked, 8.89ms Time], IncrementalHoareTripleChecker [0 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 140.91ms Time] [2021-11-12 22:56:41,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-11-12 22:56:41,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 535. [2021-11-12 22:56:41,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 404 states have (on average 1.6212871287128714) internal successors, (655), 420 states have internal predecessors, (655), 106 states have call successors, (106), 26 states have call predecessors, (106), 24 states have return successors, (103), 101 states have call predecessors, (103), 103 states have call successors, (103) [2021-11-12 22:56:41,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 864 transitions. [2021-11-12 22:56:41,322 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 864 transitions. Word has length 119 [2021-11-12 22:56:41,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:56:41,322 INFO L470 AbstractCegarLoop]: Abstraction has 535 states and 864 transitions. [2021-11-12 22:56:41,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-12 22:56:41,323 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 864 transitions. [2021-11-12 22:56:41,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-12 22:56:41,326 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:56:41,326 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:56:41,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 22:56:41,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:56:41,545 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:56:41,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:56:41,546 INFO L85 PathProgramCache]: Analyzing trace with hash 152813025, now seen corresponding path program 1 times [2021-11-12 22:56:41,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:56:41,547 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [910936403] [2021-11-12 22:56:41,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:56:41,547 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:56:41,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:56:41,548 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:56:41,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 22:56:41,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:56:41,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 921 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:56:41,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:56:42,237 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:56:42,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:56:42,690 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:56:42,690 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:56:42,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [910936403] [2021-11-12 22:56:42,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [910936403] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:56:42,691 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:56:42,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 22:56:42,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381220100] [2021-11-12 22:56:42,691 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:56:42,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 22:56:42,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:56:42,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 22:56:42,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:56:42,693 INFO L87 Difference]: Start difference. First operand 535 states and 864 transitions. Second operand has 13 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-12 22:56:42,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:56:42,926 INFO L93 Difference]: Finished difference Result 1057 states and 1716 transitions. [2021-11-12 22:56:42,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:56:42,928 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) Word has length 120 [2021-11-12 22:56:42,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:56:42,933 INFO L225 Difference]: With dead ends: 1057 [2021-11-12 22:56:42,934 INFO L226 Difference]: Without dead ends: 535 [2021-11-12 22:56:42,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-12 22:56:42,939 INFO L933 BasicCegarLoop]: 849 mSDtfsCounter, 41 mSDsluCounter, 7595 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 126.15ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 8444 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.71ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 141.26ms IncrementalHoareTripleChecker+Time [2021-11-12 22:56:42,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 8444 Invalid, 121 Unknown, 0 Unchecked, 8.71ms Time], IncrementalHoareTripleChecker [1 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 141.26ms Time] [2021-11-12 22:56:42,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-11-12 22:56:42,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 535. [2021-11-12 22:56:42,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 404 states have (on average 1.618811881188119) internal successors, (654), 420 states have internal predecessors, (654), 106 states have call successors, (106), 26 states have call predecessors, (106), 24 states have return successors, (103), 101 states have call predecessors, (103), 103 states have call successors, (103) [2021-11-12 22:56:42,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 863 transitions. [2021-11-12 22:56:42,964 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 863 transitions. Word has length 120 [2021-11-12 22:56:42,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:56:42,964 INFO L470 AbstractCegarLoop]: Abstraction has 535 states and 863 transitions. [2021-11-12 22:56:42,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-12 22:56:42,965 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 863 transitions. [2021-11-12 22:56:42,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-12 22:56:42,968 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:56:42,968 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:56:42,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 22:56:43,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:56:43,171 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:56:43,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:56:43,171 INFO L85 PathProgramCache]: Analyzing trace with hash 711722076, now seen corresponding path program 1 times [2021-11-12 22:56:43,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:56:43,172 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1021565525] [2021-11-12 22:56:43,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:56:43,172 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:56:43,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:56:43,173 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:56:43,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 22:56:43,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:56:43,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 922 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:56:43,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:56:43,940 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 22:56:43,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:56:44,298 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-12 22:56:44,299 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:56:44,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1021565525] [2021-11-12 22:56:44,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1021565525] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:56:44,299 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:56:44,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-11-12 22:56:44,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744744253] [2021-11-12 22:56:44,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:56:44,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:56:44,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:56:44,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:56:44,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:56:44,301 INFO L87 Difference]: Start difference. First operand 535 states and 863 transitions. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 5 states have internal predecessors, (83), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-12 22:56:46,332 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:56:47,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:56:47,481 INFO L93 Difference]: Finished difference Result 1572 states and 2573 transitions. [2021-11-12 22:56:47,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:56:47,483 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 5 states have internal predecessors, (83), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 121 [2021-11-12 22:56:47,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:56:47,492 INFO L225 Difference]: With dead ends: 1572 [2021-11-12 22:56:47,492 INFO L226 Difference]: Without dead ends: 1055 [2021-11-12 22:56:47,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:56:47,497 INFO L933 BasicCegarLoop]: 981 mSDtfsCounter, 845 mSDsluCounter, 3408 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 134 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2899.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 850 SdHoareTripleChecker+Valid, 4389 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.52ms SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3051.41ms IncrementalHoareTripleChecker+Time [2021-11-12 22:56:47,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [850 Valid, 4389 Invalid, 483 Unknown, 0 Unchecked, 17.52ms Time], IncrementalHoareTripleChecker [134 Valid, 348 Invalid, 1 Unknown, 0 Unchecked, 3051.41ms Time] [2021-11-12 22:56:47,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1055 states. [2021-11-12 22:56:47,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1055 to 1046. [2021-11-12 22:56:47,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1046 states, 793 states have (on average 1.6216897856242118) internal successors, (1286), 824 states have internal predecessors, (1286), 204 states have call successors, (204), 48 states have call predecessors, (204), 48 states have return successors, (215), 199 states have call predecessors, (215), 200 states have call successors, (215) [2021-11-12 22:56:47,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 1705 transitions. [2021-11-12 22:56:47,552 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 1705 transitions. Word has length 121 [2021-11-12 22:56:47,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:56:47,552 INFO L470 AbstractCegarLoop]: Abstraction has 1046 states and 1705 transitions. [2021-11-12 22:56:47,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 5 states have internal predecessors, (83), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-12 22:56:47,553 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 1705 transitions. [2021-11-12 22:56:47,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-12 22:56:47,556 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:56:47,556 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:56:47,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 22:56:47,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:56:47,770 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:56:47,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:56:47,771 INFO L85 PathProgramCache]: Analyzing trace with hash 334421852, now seen corresponding path program 1 times [2021-11-12 22:56:47,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:56:47,772 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1769154999] [2021-11-12 22:56:47,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:56:47,772 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:56:47,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:56:47,773 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:56:47,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 22:56:48,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:56:48,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 922 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:56:48,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:56:48,548 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 22:56:48,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:56:48,910 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-12 22:56:48,910 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:56:48,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1769154999] [2021-11-12 22:56:48,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1769154999] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:56:48,910 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:56:48,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-11-12 22:56:48,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760382653] [2021-11-12 22:56:48,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:56:48,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:56:48,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:56:48,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:56:48,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:56:48,915 INFO L87 Difference]: Start difference. First operand 1046 states and 1705 transitions. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 5 states have internal predecessors, (83), 4 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-12 22:56:50,951 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:56:52,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:56:52,106 INFO L93 Difference]: Finished difference Result 2560 states and 4190 transitions. [2021-11-12 22:56:52,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:56:52,108 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 5 states have internal predecessors, (83), 4 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 121 [2021-11-12 22:56:52,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:56:52,122 INFO L225 Difference]: With dead ends: 2560 [2021-11-12 22:56:52,122 INFO L226 Difference]: Without dead ends: 1532 [2021-11-12 22:56:52,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:56:52,132 INFO L933 BasicCegarLoop]: 925 mSDtfsCounter, 724 mSDsluCounter, 3115 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 156 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2903.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 728 SdHoareTripleChecker+Valid, 4040 SdHoareTripleChecker+Invalid, 696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.24ms SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3052.94ms IncrementalHoareTripleChecker+Time [2021-11-12 22:56:52,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [728 Valid, 4040 Invalid, 696 Unknown, 0 Unchecked, 12.24ms Time], IncrementalHoareTripleChecker [156 Valid, 539 Invalid, 1 Unknown, 0 Unchecked, 3052.94ms Time] [2021-11-12 22:56:52,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1532 states. [2021-11-12 22:56:52,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1532 to 1522. [2021-11-12 22:56:52,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1522 states, 1153 states have (on average 1.5949696444058976) internal successors, (1839), 1198 states have internal predecessors, (1839), 296 states have call successors, (296), 72 states have call predecessors, (296), 72 states have return successors, (318), 289 states have call predecessors, (318), 291 states have call successors, (318) [2021-11-12 22:56:52,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1522 states to 1522 states and 2453 transitions. [2021-11-12 22:56:52,215 INFO L78 Accepts]: Start accepts. Automaton has 1522 states and 2453 transitions. Word has length 121 [2021-11-12 22:56:52,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:56:52,215 INFO L470 AbstractCegarLoop]: Abstraction has 1522 states and 2453 transitions. [2021-11-12 22:56:52,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 5 states have internal predecessors, (83), 4 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-12 22:56:52,216 INFO L276 IsEmpty]: Start isEmpty. Operand 1522 states and 2453 transitions. [2021-11-12 22:56:52,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-12 22:56:52,220 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:56:52,221 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:56:52,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 22:56:52,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:56:52,434 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:56:52,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:56:52,435 INFO L85 PathProgramCache]: Analyzing trace with hash 172913293, now seen corresponding path program 1 times [2021-11-12 22:56:52,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:56:52,436 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [378253488] [2021-11-12 22:56:52,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:56:52,436 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:56:52,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:56:52,438 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:56:52,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 22:56:52,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:56:52,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 929 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:56:52,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:56:53,285 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 22:56:53,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:56:53,592 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 22:56:53,592 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:56:53,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [378253488] [2021-11-12 22:56:53,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [378253488] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:56:53,592 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:56:53,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-12 22:56:53,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165633938] [2021-11-12 22:56:53,593 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:56:53,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:56:53,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:56:53,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:56:53,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:56:53,594 INFO L87 Difference]: Start difference. First operand 1522 states and 2453 transitions. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 6 states have internal predecessors, (128), 3 states have call successors, (33), 3 states have call predecessors, (33), 5 states have return successors, (31), 4 states have call predecessors, (31), 3 states have call successors, (31) [2021-11-12 22:56:55,613 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:56:57,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:56:57,450 INFO L93 Difference]: Finished difference Result 5445 states and 9197 transitions. [2021-11-12 22:56:57,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:56:57,452 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 6 states have internal predecessors, (128), 3 states have call successors, (33), 3 states have call predecessors, (33), 5 states have return successors, (31), 4 states have call predecessors, (31), 3 states have call successors, (31) Word has length 126 [2021-11-12 22:56:57,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:56:57,496 INFO L225 Difference]: With dead ends: 5445 [2021-11-12 22:56:57,496 INFO L226 Difference]: Without dead ends: 3941 [2021-11-12 22:56:57,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:56:57,512 INFO L933 BasicCegarLoop]: 1312 mSDtfsCounter, 1140 mSDsluCounter, 4416 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 96 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3354.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1221 SdHoareTripleChecker+Valid, 5728 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 22.08ms SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3571.77ms IncrementalHoareTripleChecker+Time [2021-11-12 22:56:57,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1221 Valid, 5728 Invalid, 681 Unknown, 0 Unchecked, 22.08ms Time], IncrementalHoareTripleChecker [96 Valid, 584 Invalid, 1 Unknown, 0 Unchecked, 3571.77ms Time] [2021-11-12 22:56:57,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3941 states. [2021-11-12 22:56:57,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3941 to 2990. [2021-11-12 22:56:57,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2990 states, 2269 states have (on average 1.5905685323931247) internal successors, (3609), 2360 states have internal predecessors, (3609), 572 states have call successors, (572), 141 states have call predecessors, (572), 148 states have return successors, (715), 564 states have call predecessors, (715), 564 states have call successors, (715) [2021-11-12 22:56:57,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2990 states to 2990 states and 4896 transitions. [2021-11-12 22:56:57,759 INFO L78 Accepts]: Start accepts. Automaton has 2990 states and 4896 transitions. Word has length 126 [2021-11-12 22:56:57,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:56:57,759 INFO L470 AbstractCegarLoop]: Abstraction has 2990 states and 4896 transitions. [2021-11-12 22:56:57,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 6 states have internal predecessors, (128), 3 states have call successors, (33), 3 states have call predecessors, (33), 5 states have return successors, (31), 4 states have call predecessors, (31), 3 states have call successors, (31) [2021-11-12 22:56:57,760 INFO L276 IsEmpty]: Start isEmpty. Operand 2990 states and 4896 transitions. [2021-11-12 22:56:57,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-12 22:56:57,763 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:56:57,763 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:56:57,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-12 22:56:57,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:56:57,987 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:56:57,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:56:57,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1713042310, now seen corresponding path program 1 times [2021-11-12 22:56:57,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:56:57,988 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1444861895] [2021-11-12 22:56:57,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:56:57,988 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:56:57,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:56:57,989 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:56:57,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-12 22:56:58,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:56:58,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 930 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:56:58,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:56:58,698 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 22:56:58,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:56:59,015 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 22:56:59,015 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:56:59,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1444861895] [2021-11-12 22:56:59,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1444861895] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:56:59,015 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:56:59,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-12 22:56:59,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278422307] [2021-11-12 22:56:59,016 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:56:59,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:56:59,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:56:59,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:56:59,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:56:59,017 INFO L87 Difference]: Start difference. First operand 2990 states and 4896 transitions. Second operand has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-12 22:56:59,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:56:59,251 INFO L93 Difference]: Finished difference Result 5980 states and 9920 transitions. [2021-11-12 22:56:59,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:56:59,252 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 127 [2021-11-12 22:56:59,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:56:59,283 INFO L225 Difference]: With dead ends: 5980 [2021-11-12 22:56:59,283 INFO L226 Difference]: Without dead ends: 3008 [2021-11-12 22:56:59,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:56:59,319 INFO L933 BasicCegarLoop]: 843 mSDtfsCounter, 23 mSDsluCounter, 1659 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 65.97ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 2502 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.70ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 77.12ms IncrementalHoareTripleChecker+Time [2021-11-12 22:56:59,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 2502 Invalid, 74 Unknown, 0 Unchecked, 4.70ms Time], IncrementalHoareTripleChecker [10 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 77.12ms Time] [2021-11-12 22:56:59,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3008 states. [2021-11-12 22:56:59,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3008 to 3002. [2021-11-12 22:56:59,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3002 states, 2278 states have (on average 1.586918349429324) internal successors, (3615), 2369 states have internal predecessors, (3615), 572 states have call successors, (572), 147 states have call predecessors, (572), 151 states have return successors, (699), 561 states have call predecessors, (699), 564 states have call successors, (699) [2021-11-12 22:56:59,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3002 states to 3002 states and 4886 transitions. [2021-11-12 22:56:59,551 INFO L78 Accepts]: Start accepts. Automaton has 3002 states and 4886 transitions. Word has length 127 [2021-11-12 22:56:59,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:56:59,552 INFO L470 AbstractCegarLoop]: Abstraction has 3002 states and 4886 transitions. [2021-11-12 22:56:59,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-12 22:56:59,553 INFO L276 IsEmpty]: Start isEmpty. Operand 3002 states and 4886 transitions. [2021-11-12 22:56:59,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-12 22:56:59,557 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:56:59,557 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:56:59,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-12 22:56:59,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:56:59,777 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:56:59,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:56:59,778 INFO L85 PathProgramCache]: Analyzing trace with hash -123547852, now seen corresponding path program 1 times [2021-11-12 22:56:59,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:56:59,778 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1115320476] [2021-11-12 22:56:59,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:56:59,778 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:56:59,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:56:59,779 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:56:59,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 22:57:00,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:57:00,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 942 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:57:00,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:57:00,596 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-12 22:57:00,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:57:00,896 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 22:57:00,896 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:57:00,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1115320476] [2021-11-12 22:57:00,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1115320476] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:57:00,897 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:57:00,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-12 22:57:00,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357652794] [2021-11-12 22:57:00,898 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:57:00,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:57:00,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:57:00,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:57:00,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:57:00,900 INFO L87 Difference]: Start difference. First operand 3002 states and 4886 transitions. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 6 states have internal predecessors, (137), 3 states have call successors, (35), 3 states have call predecessors, (35), 5 states have return successors, (33), 4 states have call predecessors, (33), 3 states have call successors, (33) [2021-11-12 22:57:02,930 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:57:04,938 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:57:06,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:57:06,917 INFO L93 Difference]: Finished difference Result 10814 states and 18701 transitions. [2021-11-12 22:57:06,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:57:06,919 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 6 states have internal predecessors, (137), 3 states have call successors, (35), 3 states have call predecessors, (35), 5 states have return successors, (33), 4 states have call predecessors, (33), 3 states have call successors, (33) Word has length 135 [2021-11-12 22:57:06,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:57:07,011 INFO L225 Difference]: With dead ends: 10814 [2021-11-12 22:57:07,011 INFO L226 Difference]: Without dead ends: 7830 [2021-11-12 22:57:07,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:57:07,030 INFO L933 BasicCegarLoop]: 1295 mSDtfsCounter, 1117 mSDsluCounter, 4384 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 92 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5378.33ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1187 SdHoareTripleChecker+Valid, 5679 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 21.74ms SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5589.01ms IncrementalHoareTripleChecker+Time [2021-11-12 22:57:07,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1187 Valid, 5679 Invalid, 670 Unknown, 0 Unchecked, 21.74ms Time], IncrementalHoareTripleChecker [92 Valid, 576 Invalid, 2 Unknown, 0 Unchecked, 5589.01ms Time] [2021-11-12 22:57:07,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7830 states. [2021-11-12 22:57:07,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7830 to 5980. [2021-11-12 22:57:07,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5980 states, 4540 states have (on average 1.5821585903083701) internal successors, (7183), 4726 states have internal predecessors, (7183), 1127 states have call successors, (1127), 291 states have call predecessors, (1127), 312 states have return successors, (1626), 1114 states have call predecessors, (1626), 1113 states have call successors, (1626) [2021-11-12 22:57:07,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5980 states to 5980 states and 9936 transitions. [2021-11-12 22:57:07,515 INFO L78 Accepts]: Start accepts. Automaton has 5980 states and 9936 transitions. Word has length 135 [2021-11-12 22:57:07,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:57:07,516 INFO L470 AbstractCegarLoop]: Abstraction has 5980 states and 9936 transitions. [2021-11-12 22:57:07,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 6 states have internal predecessors, (137), 3 states have call successors, (35), 3 states have call predecessors, (35), 5 states have return successors, (33), 4 states have call predecessors, (33), 3 states have call successors, (33) [2021-11-12 22:57:07,516 INFO L276 IsEmpty]: Start isEmpty. Operand 5980 states and 9936 transitions. [2021-11-12 22:57:07,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-12 22:57:07,519 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:57:07,519 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:57:07,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-12 22:57:07,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:57:07,739 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:57:07,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:57:07,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1982290425, now seen corresponding path program 1 times [2021-11-12 22:57:07,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:57:07,740 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1463177202] [2021-11-12 22:57:07,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:57:07,740 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:57:07,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:57:07,742 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:57:07,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-12 22:57:08,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:57:08,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 943 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:57:08,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:57:08,526 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-12 22:57:08,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:57:08,781 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 22:57:08,781 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:57:08,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1463177202] [2021-11-12 22:57:08,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1463177202] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:57:08,782 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:57:08,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-12 22:57:08,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410043227] [2021-11-12 22:57:08,782 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:57:08,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:57:08,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:57:08,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:57:08,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:57:08,784 INFO L87 Difference]: Start difference. First operand 5980 states and 9936 transitions. Second operand has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-12 22:57:09,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:57:09,206 INFO L93 Difference]: Finished difference Result 12014 states and 20295 transitions. [2021-11-12 22:57:09,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:57:09,207 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 136 [2021-11-12 22:57:09,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:57:09,266 INFO L225 Difference]: With dead ends: 12014 [2021-11-12 22:57:09,266 INFO L226 Difference]: Without dead ends: 6052 [2021-11-12 22:57:09,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:57:09,305 INFO L933 BasicCegarLoop]: 841 mSDtfsCounter, 34 mSDsluCounter, 830 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 50.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 1671 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.37ms SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 63.96ms IncrementalHoareTripleChecker+Time [2021-11-12 22:57:09,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 1671 Invalid, 66 Unknown, 0 Unchecked, 3.37ms Time], IncrementalHoareTripleChecker [19 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 63.96ms Time] [2021-11-12 22:57:09,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6052 states. [2021-11-12 22:57:09,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6052 to 6040. [2021-11-12 22:57:09,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6040 states, 4594 states have (on average 1.5766216804527644) internal successors, (7243), 4768 states have internal predecessors, (7243), 1127 states have call successors, (1127), 315 states have call predecessors, (1127), 318 states have return successors, (1602), 1108 states have call predecessors, (1602), 1113 states have call successors, (1602) [2021-11-12 22:57:09,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6040 states to 6040 states and 9972 transitions. [2021-11-12 22:57:09,768 INFO L78 Accepts]: Start accepts. Automaton has 6040 states and 9972 transitions. Word has length 136 [2021-11-12 22:57:09,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:57:09,769 INFO L470 AbstractCegarLoop]: Abstraction has 6040 states and 9972 transitions. [2021-11-12 22:57:09,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-12 22:57:09,770 INFO L276 IsEmpty]: Start isEmpty. Operand 6040 states and 9972 transitions. [2021-11-12 22:57:09,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-12 22:57:09,773 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:57:09,773 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:57:09,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-12 22:57:09,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:57:09,994 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:57:09,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:57:09,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1381086620, now seen corresponding path program 1 times [2021-11-12 22:57:09,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:57:09,995 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1680877500] [2021-11-12 22:57:09,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:57:09,995 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:57:09,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:57:09,996 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:57:09,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-12 22:57:10,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:57:10,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 956 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:57:10,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:57:10,794 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 22:57:10,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:57:11,187 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-12 22:57:11,187 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:57:11,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1680877500] [2021-11-12 22:57:11,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1680877500] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:57:11,188 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:57:11,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-12 22:57:11,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483959424] [2021-11-12 22:57:11,188 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:57:11,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:57:11,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:57:11,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:57:11,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:57:11,190 INFO L87 Difference]: Start difference. First operand 6040 states and 9972 transitions. Second operand has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 6 states have internal predecessors, (144), 3 states have call successors, (37), 3 states have call predecessors, (37), 5 states have return successors, (35), 4 states have call predecessors, (35), 3 states have call successors, (35) [2021-11-12 22:57:13,218 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:57:15,224 WARN L515 Checker$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 22:57:17,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:57:17,863 INFO L93 Difference]: Finished difference Result 21742 states and 38948 transitions. [2021-11-12 22:57:17,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:57:17,864 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 6 states have internal predecessors, (144), 3 states have call successors, (37), 3 states have call predecessors, (37), 5 states have return successors, (35), 4 states have call predecessors, (35), 3 states have call successors, (35) Word has length 145 [2021-11-12 22:57:17,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:57:17,977 INFO L225 Difference]: With dead ends: 21742 [2021-11-12 22:57:17,978 INFO L226 Difference]: Without dead ends: 15720 [2021-11-12 22:57:18,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:57:18,026 INFO L933 BasicCegarLoop]: 1292 mSDtfsCounter, 1095 mSDsluCounter, 5129 mSDsCounter, 0 mSdLazyCounter, 926 mSolverCounterSat, 87 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5560.93ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1161 SdHoareTripleChecker+Valid, 6421 SdHoareTripleChecker+Invalid, 1015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 22.47ms SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 926 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5820.46ms IncrementalHoareTripleChecker+Time [2021-11-12 22:57:18,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1161 Valid, 6421 Invalid, 1015 Unknown, 0 Unchecked, 22.47ms Time], IncrementalHoareTripleChecker [87 Valid, 926 Invalid, 2 Unknown, 0 Unchecked, 5820.46ms Time] [2021-11-12 22:57:18,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15720 states. [2021-11-12 22:57:18,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15720 to 12104. [2021-11-12 22:57:19,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12104 states, 9205 states have (on average 1.5717544812601847) internal successors, (14468), 9563 states have internal predecessors, (14468), 2240 states have call successors, (2240), 627 states have call predecessors, (2240), 658 states have return successors, (3841), 2217 states have call predecessors, (3841), 2214 states have call successors, (3841) [2021-11-12 22:57:19,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12104 states to 12104 states and 20549 transitions. [2021-11-12 22:57:19,138 INFO L78 Accepts]: Start accepts. Automaton has 12104 states and 20549 transitions. Word has length 145 [2021-11-12 22:57:19,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:57:19,139 INFO L470 AbstractCegarLoop]: Abstraction has 12104 states and 20549 transitions. [2021-11-12 22:57:19,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 6 states have internal predecessors, (144), 3 states have call successors, (37), 3 states have call predecessors, (37), 5 states have return successors, (35), 4 states have call predecessors, (35), 3 states have call successors, (35) [2021-11-12 22:57:19,139 INFO L276 IsEmpty]: Start isEmpty. Operand 12104 states and 20549 transitions. [2021-11-12 22:57:19,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-12 22:57:19,142 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:57:19,143 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:57:19,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-12 22:57:19,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:57:19,363 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:57:19,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:57:19,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1111291105, now seen corresponding path program 1 times [2021-11-12 22:57:19,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:57:19,364 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1813926577] [2021-11-12 22:57:19,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:57:19,364 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:57:19,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:57:19,365 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:57:19,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-12 22:57:19,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:57:19,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 957 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:57:19,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:57:20,053 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:57:20,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:57:20,319 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-12 22:57:20,319 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:57:20,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1813926577] [2021-11-12 22:57:20,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1813926577] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:57:20,320 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:57:20,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-12 22:57:20,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352190172] [2021-11-12 22:57:20,322 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:57:20,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:57:20,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:57:20,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:57:20,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:57:20,323 INFO L87 Difference]: Start difference. First operand 12104 states and 20549 transitions. Second operand has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-12 22:57:21,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:57:21,024 INFO L93 Difference]: Finished difference Result 24334 states and 42325 transitions. [2021-11-12 22:57:21,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:57:21,025 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 146 [2021-11-12 22:57:21,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:57:21,107 INFO L225 Difference]: With dead ends: 24334 [2021-11-12 22:57:21,107 INFO L226 Difference]: Without dead ends: 12248 [2021-11-12 22:57:21,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:57:21,301 INFO L933 BasicCegarLoop]: 841 mSDtfsCounter, 21 mSDsluCounter, 1659 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 136.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 2500 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.11ms SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 146.84ms IncrementalHoareTripleChecker+Time [2021-11-12 22:57:21,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 2500 Invalid, 82 Unknown, 0 Unchecked, 3.11ms Time], IncrementalHoareTripleChecker [20 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 146.84ms Time] [2021-11-12 22:57:21,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12248 states. [2021-11-12 22:57:22,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12248 to 12224. [2021-11-12 22:57:22,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12224 states, 9313 states have (on average 1.5664125416085042) internal successors, (14588), 9671 states have internal predecessors, (14588), 2240 states have call successors, (2240), 651 states have call predecessors, (2240), 670 states have return successors, (3809), 2205 states have call predecessors, (3809), 2214 states have call successors, (3809) [2021-11-12 22:57:22,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12224 states to 12224 states and 20637 transitions. [2021-11-12 22:57:22,206 INFO L78 Accepts]: Start accepts. Automaton has 12224 states and 20637 transitions. Word has length 146 [2021-11-12 22:57:22,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:57:22,207 INFO L470 AbstractCegarLoop]: Abstraction has 12224 states and 20637 transitions. [2021-11-12 22:57:22,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-12 22:57:22,207 INFO L276 IsEmpty]: Start isEmpty. Operand 12224 states and 20637 transitions. [2021-11-12 22:57:22,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-12 22:57:22,210 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:57:22,210 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:57:22,230 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-12 22:57:22,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:57:22,430 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:57:22,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:57:22,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1921114243, now seen corresponding path program 1 times [2021-11-12 22:57:22,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:57:22,431 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1428969332] [2021-11-12 22:57:22,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:57:22,432 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:57:22,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:57:22,433 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:57:22,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-12 22:57:22,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:57:22,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 971 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:57:22,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:57:23,256 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-12 22:57:23,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:57:23,684 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-12 22:57:23,684 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:57:23,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1428969332] [2021-11-12 22:57:23,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1428969332] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:57:23,684 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:57:23,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-12 22:57:23,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199075646] [2021-11-12 22:57:23,685 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:57:23,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:57:23,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:57:23,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:57:23,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:57:23,687 INFO L87 Difference]: Start difference. First operand 12224 states and 20637 transitions. Second operand has 7 states, 7 states have (on average 21.571428571428573) internal successors, (151), 6 states have internal predecessors, (151), 3 states have call successors, (39), 3 states have call predecessors, (39), 5 states have return successors, (37), 4 states have call predecessors, (37), 3 states have call successors, (37) [2021-11-12 22:57:25,713 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:57:27,720 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:57:31,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:57:31,021 INFO L93 Difference]: Finished difference Result 43846 states and 82826 transitions. [2021-11-12 22:57:31,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:57:31,023 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.571428571428573) internal successors, (151), 6 states have internal predecessors, (151), 3 states have call successors, (39), 3 states have call predecessors, (39), 5 states have return successors, (37), 4 states have call predecessors, (37), 3 states have call successors, (37) Word has length 156 [2021-11-12 22:57:31,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:57:31,322 INFO L225 Difference]: With dead ends: 43846 [2021-11-12 22:57:31,322 INFO L226 Difference]: Without dead ends: 31640 [2021-11-12 22:57:31,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 305 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:57:31,672 INFO L933 BasicCegarLoop]: 1127 mSDtfsCounter, 1154 mSDsluCounter, 3991 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 144 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5116.06ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1216 SdHoareTripleChecker+Valid, 5118 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.82ms SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5334.92ms IncrementalHoareTripleChecker+Time [2021-11-12 22:57:31,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1216 Valid, 5118 Invalid, 644 Unknown, 0 Unchecked, 15.82ms Time], IncrementalHoareTripleChecker [144 Valid, 498 Invalid, 2 Unknown, 0 Unchecked, 5334.92ms Time] [2021-11-12 22:57:31,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31640 states. [2021-11-12 22:57:33,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31640 to 24556. [2021-11-12 22:57:33,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24556 states, 18700 states have (on average 1.5615508021390374) internal successors, (29201), 19438 states have internal predecessors, (29201), 4469 states have call successors, (4469), 1299 states have call predecessors, (4469), 1386 states have return successors, (9440), 4426 states have call predecessors, (9440), 4419 states have call successors, (9440) [2021-11-12 22:57:33,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24556 states to 24556 states and 43110 transitions. [2021-11-12 22:57:34,018 INFO L78 Accepts]: Start accepts. Automaton has 24556 states and 43110 transitions. Word has length 156 [2021-11-12 22:57:34,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:57:34,019 INFO L470 AbstractCegarLoop]: Abstraction has 24556 states and 43110 transitions. [2021-11-12 22:57:34,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.571428571428573) internal successors, (151), 6 states have internal predecessors, (151), 3 states have call successors, (39), 3 states have call predecessors, (39), 5 states have return successors, (37), 4 states have call predecessors, (37), 3 states have call successors, (37) [2021-11-12 22:57:34,019 INFO L276 IsEmpty]: Start isEmpty. Operand 24556 states and 43110 transitions. [2021-11-12 22:57:34,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-12 22:57:34,022 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:57:34,023 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:57:34,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-12 22:57:34,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:57:34,242 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:57:34,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:57:34,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1980949670, now seen corresponding path program 1 times [2021-11-12 22:57:34,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:57:34,243 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2057728723] [2021-11-12 22:57:34,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:57:34,243 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:57:34,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:57:34,245 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:57:34,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-12 22:57:34,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:57:34,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 971 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:57:34,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:57:35,193 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-12 22:57:35,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:57:35,641 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-12 22:57:35,642 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:57:35,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2057728723] [2021-11-12 22:57:35,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2057728723] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:57:35,643 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:57:35,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 22:57:35,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970808350] [2021-11-12 22:57:35,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:57:35,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:57:35,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:57:35,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:57:35,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:57:35,647 INFO L87 Difference]: Start difference. First operand 24556 states and 43110 transitions. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-12 22:57:37,780 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:57:39,786 WARN L515 Checker$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 22:57:42,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:57:42,478 INFO L93 Difference]: Finished difference Result 49286 states and 90804 transitions. [2021-11-12 22:57:42,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:57:42,480 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 157 [2021-11-12 22:57:42,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:57:42,678 INFO L225 Difference]: With dead ends: 49286 [2021-11-12 22:57:42,678 INFO L226 Difference]: Without dead ends: 24748 [2021-11-12 22:57:43,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 305 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:57:43,188 INFO L933 BasicCegarLoop]: 833 mSDtfsCounter, 755 mSDsluCounter, 1277 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 16 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4703.31ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 773 SdHoareTripleChecker+Valid, 2110 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.09ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4948.52ms IncrementalHoareTripleChecker+Time [2021-11-12 22:57:43,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [773 Valid, 2110 Invalid, 481 Unknown, 0 Unchecked, 6.09ms Time], IncrementalHoareTripleChecker [16 Valid, 463 Invalid, 2 Unknown, 0 Unchecked, 4948.52ms Time] [2021-11-12 22:57:43,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24748 states. [2021-11-12 22:57:44,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24748 to 24748. [2021-11-12 22:57:44,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24748 states, 18844 states have (on average 1.5572596051793675) internal successors, (29345), 19582 states have internal predecessors, (29345), 4469 states have call successors, (4469), 1347 states have call predecessors, (4469), 1434 states have return successors, (9488), 4426 states have call predecessors, (9488), 4419 states have call successors, (9488) [2021-11-12 22:57:44,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24748 states to 24748 states and 43302 transitions. [2021-11-12 22:57:44,666 INFO L78 Accepts]: Start accepts. Automaton has 24748 states and 43302 transitions. Word has length 157 [2021-11-12 22:57:44,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:57:44,667 INFO L470 AbstractCegarLoop]: Abstraction has 24748 states and 43302 transitions. [2021-11-12 22:57:44,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-12 22:57:44,668 INFO L276 IsEmpty]: Start isEmpty. Operand 24748 states and 43302 transitions. [2021-11-12 22:57:44,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-11-12 22:57:44,670 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:57:44,670 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:57:44,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-12 22:57:44,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:57:44,887 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:57:44,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:57:44,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1646782312, now seen corresponding path program 1 times [2021-11-12 22:57:44,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:57:44,889 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [378910796] [2021-11-12 22:57:44,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:57:44,889 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:57:44,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:57:44,890 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:57:44,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-12 22:57:45,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:57:45,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 973 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:57:45,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:57:45,893 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-12 22:57:45,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:57:46,354 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-12 22:57:46,355 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:57:46,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [378910796] [2021-11-12 22:57:46,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [378910796] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:57:46,355 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:57:46,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 22:57:46,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904405238] [2021-11-12 22:57:46,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:57:46,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:57:46,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:57:46,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:57:46,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:57:46,357 INFO L87 Difference]: Start difference. First operand 24748 states and 43302 transitions. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 4 states have internal predecessors, (104), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-12 22:57:48,387 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:57:50,394 WARN L515 Checker$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 22:57:52,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:57:52,894 INFO L93 Difference]: Finished difference Result 49718 states and 91156 transitions. [2021-11-12 22:57:52,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:57:52,895 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 4 states have internal predecessors, (104), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 159 [2021-11-12 22:57:52,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:57:53,072 INFO L225 Difference]: With dead ends: 49718 [2021-11-12 22:57:53,072 INFO L226 Difference]: Without dead ends: 24988 [2021-11-12 22:57:53,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 309 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:57:53,590 INFO L933 BasicCegarLoop]: 834 mSDtfsCounter, 765 mSDsluCounter, 1277 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 14 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4664.22ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 782 SdHoareTripleChecker+Valid, 2111 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.66ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4779.55ms IncrementalHoareTripleChecker+Time [2021-11-12 22:57:53,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [782 Valid, 2111 Invalid, 483 Unknown, 0 Unchecked, 5.66ms Time], IncrementalHoareTripleChecker [14 Valid, 467 Invalid, 2 Unknown, 0 Unchecked, 4779.55ms Time] [2021-11-12 22:57:53,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24988 states. [2021-11-12 22:57:54,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24988 to 24988. [2021-11-12 22:57:54,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24988 states, 19036 states have (on average 1.5516389997898719) internal successors, (29537), 19774 states have internal predecessors, (29537), 4469 states have call successors, (4469), 1395 states have call predecessors, (4469), 1482 states have return successors, (9536), 4426 states have call predecessors, (9536), 4419 states have call successors, (9536) [2021-11-12 22:57:55,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24988 states to 24988 states and 43542 transitions. [2021-11-12 22:57:55,348 INFO L78 Accepts]: Start accepts. Automaton has 24988 states and 43542 transitions. Word has length 159 [2021-11-12 22:57:55,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:57:55,348 INFO L470 AbstractCegarLoop]: Abstraction has 24988 states and 43542 transitions. [2021-11-12 22:57:55,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 4 states have internal predecessors, (104), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-12 22:57:55,349 INFO L276 IsEmpty]: Start isEmpty. Operand 24988 states and 43542 transitions. [2021-11-12 22:57:55,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-12 22:57:55,352 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:57:55,352 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:57:55,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-12 22:57:55,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:57:55,553 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:57:55,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:57:55,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1148501606, now seen corresponding path program 1 times [2021-11-12 22:57:55,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:57:55,555 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1064588779] [2021-11-12 22:57:55,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:57:55,555 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:57:55,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:57:55,556 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:57:55,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-12 22:57:55,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:57:56,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 975 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:57:56,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:57:56,500 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-12 22:57:56,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:57:56,976 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-12 22:57:56,976 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:57:56,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1064588779] [2021-11-12 22:57:56,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1064588779] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:57:56,977 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:57:56,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 22:57:56,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102079868] [2021-11-12 22:57:56,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:57:56,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:57:56,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:57:56,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:57:56,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:57:56,979 INFO L87 Difference]: Start difference. First operand 24988 states and 43542 transitions. Second operand has 5 states, 5 states have (on average 21.2) internal successors, (106), 4 states have internal predecessors, (106), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-12 22:57:58,998 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:58:01,005 WARN L515 Checker$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 22:58:04,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:58:04,122 INFO L93 Difference]: Finished difference Result 50246 states and 91628 transitions. [2021-11-12 22:58:04,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:58:04,124 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.2) internal successors, (106), 4 states have internal predecessors, (106), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 161 [2021-11-12 22:58:04,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:58:04,340 INFO L225 Difference]: With dead ends: 50246 [2021-11-12 22:58:04,340 INFO L226 Difference]: Without dead ends: 25276 [2021-11-12 22:58:05,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 313 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:58:05,072 INFO L933 BasicCegarLoop]: 834 mSDtfsCounter, 756 mSDsluCounter, 1277 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 12 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4845.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 773 SdHoareTripleChecker+Valid, 2111 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.79ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4991.78ms IncrementalHoareTripleChecker+Time [2021-11-12 22:58:05,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [773 Valid, 2111 Invalid, 482 Unknown, 0 Unchecked, 7.79ms Time], IncrementalHoareTripleChecker [12 Valid, 468 Invalid, 2 Unknown, 0 Unchecked, 4991.78ms Time] [2021-11-12 22:58:05,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25276 states. [2021-11-12 22:58:06,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25276 to 25276. [2021-11-12 22:58:06,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25276 states, 19276 states have (on average 1.5447706993152106) internal successors, (29777), 20014 states have internal predecessors, (29777), 4469 states have call successors, (4469), 1443 states have call predecessors, (4469), 1530 states have return successors, (9584), 4426 states have call predecessors, (9584), 4419 states have call successors, (9584) [2021-11-12 22:58:06,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25276 states to 25276 states and 43830 transitions. [2021-11-12 22:58:06,561 INFO L78 Accepts]: Start accepts. Automaton has 25276 states and 43830 transitions. Word has length 161 [2021-11-12 22:58:06,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:58:06,562 INFO L470 AbstractCegarLoop]: Abstraction has 25276 states and 43830 transitions. [2021-11-12 22:58:06,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.2) internal successors, (106), 4 states have internal predecessors, (106), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-12 22:58:06,562 INFO L276 IsEmpty]: Start isEmpty. Operand 25276 states and 43830 transitions. [2021-11-12 22:58:06,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-11-12 22:58:06,565 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:58:06,566 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:58:06,614 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2021-11-12 22:58:06,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:58:06,782 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:58:06,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:58:06,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1099335856, now seen corresponding path program 1 times [2021-11-12 22:58:06,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:58:06,784 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [650997082] [2021-11-12 22:58:06,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:58:06,784 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:58:06,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:58:06,785 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:58:06,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-12 22:58:07,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:58:07,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 977 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:58:07,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:58:07,706 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-12 22:58:07,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:58:08,265 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-12 22:58:08,266 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:58:08,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [650997082] [2021-11-12 22:58:08,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [650997082] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:58:08,266 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:58:08,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 22:58:08,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562030057] [2021-11-12 22:58:08,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:58:08,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:58:08,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:58:08,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:58:08,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:58:08,268 INFO L87 Difference]: Start difference. First operand 25276 states and 43830 transitions. Second operand has 5 states, 5 states have (on average 21.6) internal successors, (108), 4 states have internal predecessors, (108), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-12 22:58:10,291 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:58:12,297 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:58:15,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:58:15,428 INFO L93 Difference]: Finished difference Result 50870 states and 92208 transitions. [2021-11-12 22:58:15,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:58:15,430 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 4 states have internal predecessors, (108), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 163 [2021-11-12 22:58:15,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:58:15,676 INFO L225 Difference]: With dead ends: 50870 [2021-11-12 22:58:15,676 INFO L226 Difference]: Without dead ends: 25612 [2021-11-12 22:58:16,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 317 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:58:16,034 INFO L933 BasicCegarLoop]: 834 mSDtfsCounter, 757 mSDsluCounter, 1277 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 10 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4826.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 774 SdHoareTripleChecker+Valid, 2111 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.46ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5129.59ms IncrementalHoareTripleChecker+Time [2021-11-12 22:58:16,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [774 Valid, 2111 Invalid, 481 Unknown, 0 Unchecked, 7.46ms Time], IncrementalHoareTripleChecker [10 Valid, 469 Invalid, 2 Unknown, 0 Unchecked, 5129.59ms Time] [2021-11-12 22:58:16,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25612 states. [2021-11-12 22:58:17,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25612 to 25612. [2021-11-12 22:58:17,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25612 states, 19564 states have (on average 1.5367511756287058) internal successors, (30065), 20302 states have internal predecessors, (30065), 4469 states have call successors, (4469), 1491 states have call predecessors, (4469), 1578 states have return successors, (9632), 4426 states have call predecessors, (9632), 4419 states have call successors, (9632) [2021-11-12 22:58:17,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25612 states to 25612 states and 44166 transitions. [2021-11-12 22:58:17,881 INFO L78 Accepts]: Start accepts. Automaton has 25612 states and 44166 transitions. Word has length 163 [2021-11-12 22:58:17,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:58:17,881 INFO L470 AbstractCegarLoop]: Abstraction has 25612 states and 44166 transitions. [2021-11-12 22:58:17,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 4 states have internal predecessors, (108), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-12 22:58:17,881 INFO L276 IsEmpty]: Start isEmpty. Operand 25612 states and 44166 transitions. [2021-11-12 22:58:17,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-12 22:58:17,886 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:58:17,886 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:58:17,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-12 22:58:18,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:58:18,090 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:58:18,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:58:18,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1228102106, now seen corresponding path program 1 times [2021-11-12 22:58:18,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:58:18,091 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [21594945] [2021-11-12 22:58:18,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:58:18,091 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:58:18,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:58:18,093 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:58:18,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-12 22:58:18,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:58:18,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 979 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:58:18,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:58:19,639 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-12 22:58:19,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:58:20,145 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-12 22:58:20,145 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:58:20,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [21594945] [2021-11-12 22:58:20,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [21594945] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:58:20,146 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:58:20,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2021-11-12 22:58:20,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744801320] [2021-11-12 22:58:20,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:58:20,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:58:20,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:58:20,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:58:20,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:58:20,147 INFO L87 Difference]: Start difference. First operand 25612 states and 44166 transitions. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 5 states have internal predecessors, (114), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2021-11-12 22:58:22,171 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:58:24,178 WARN L515 Checker$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 22:58:26,185 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 22:58:31,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:58:31,521 INFO L93 Difference]: Finished difference Result 57566 states and 105324 transitions. [2021-11-12 22:58:31,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:58:31,523 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 5 states have internal predecessors, (114), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) Word has length 165 [2021-11-12 22:58:31,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:58:31,735 INFO L225 Difference]: With dead ends: 57566 [2021-11-12 22:58:31,735 INFO L226 Difference]: Without dead ends: 31972 [2021-11-12 22:58:31,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-11-12 22:58:31,895 INFO L933 BasicCegarLoop]: 1065 mSDtfsCounter, 1796 mSDsluCounter, 2744 mSDsCounter, 0 mSdLazyCounter, 2004 mSolverCounterSat, 120 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8860.30ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1853 SdHoareTripleChecker+Valid, 3809 SdHoareTripleChecker+Invalid, 2127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.90ms SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 2004 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9413.33ms IncrementalHoareTripleChecker+Time [2021-11-12 22:58:31,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1853 Valid, 3809 Invalid, 2127 Unknown, 0 Unchecked, 15.90ms Time], IncrementalHoareTripleChecker [120 Valid, 2004 Invalid, 3 Unknown, 0 Unchecked, 9413.33ms Time] [2021-11-12 22:58:31,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31972 states. [2021-11-12 22:58:33,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31972 to 25612. [2021-11-12 22:58:33,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25612 states, 19564 states have (on average 1.535933346963811) internal successors, (30049), 20302 states have internal predecessors, (30049), 4469 states have call successors, (4469), 1491 states have call predecessors, (4469), 1578 states have return successors, (9632), 4426 states have call predecessors, (9632), 4419 states have call successors, (9632) [2021-11-12 22:58:33,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25612 states to 25612 states and 44150 transitions. [2021-11-12 22:58:33,746 INFO L78 Accepts]: Start accepts. Automaton has 25612 states and 44150 transitions. Word has length 165 [2021-11-12 22:58:33,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:58:33,748 INFO L470 AbstractCegarLoop]: Abstraction has 25612 states and 44150 transitions. [2021-11-12 22:58:33,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 5 states have internal predecessors, (114), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2021-11-12 22:58:33,749 INFO L276 IsEmpty]: Start isEmpty. Operand 25612 states and 44150 transitions. [2021-11-12 22:58:33,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-11-12 22:58:33,751 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:58:33,751 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:58:33,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-12 22:58:33,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:58:33,952 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:58:33,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:58:33,952 INFO L85 PathProgramCache]: Analyzing trace with hash 2020830948, now seen corresponding path program 1 times [2021-11-12 22:58:33,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:58:33,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [645224851] [2021-11-12 22:58:33,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:58:33,953 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:58:33,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:58:33,954 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:58:33,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-12 22:58:34,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:58:34,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 989 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-12 22:58:34,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:58:34,832 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-12 22:58:34,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:58:35,306 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-12 22:58:35,306 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:58:35,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [645224851] [2021-11-12 22:58:35,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [645224851] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:58:35,307 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:58:35,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2021-11-12 22:58:35,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312560038] [2021-11-12 22:58:35,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:58:35,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:58:35,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:58:35,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:58:35,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-11-12 22:58:35,308 INFO L87 Difference]: Start difference. First operand 25612 states and 44150 transitions. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 6 states have internal predecessors, (116), 3 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-12 22:58:37,327 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:58:43,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:58:43,047 INFO L93 Difference]: Finished difference Result 86742 states and 163122 transitions. [2021-11-12 22:58:43,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 22:58:43,049 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 6 states have internal predecessors, (116), 3 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 3 states have call successors, (21) Word has length 171 [2021-11-12 22:58:43,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:58:43,791 INFO L225 Difference]: With dead ends: 86742 [2021-11-12 22:58:43,792 INFO L226 Difference]: Without dead ends: 61148 [2021-11-12 22:58:44,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-11-12 22:58:44,029 INFO L933 BasicCegarLoop]: 1302 mSDtfsCounter, 993 mSDsluCounter, 5540 mSDsCounter, 0 mSdLazyCounter, 1022 mSolverCounterSat, 90 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3341.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1029 SdHoareTripleChecker+Valid, 6842 SdHoareTripleChecker+Invalid, 1113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.32ms SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1022 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3537.55ms IncrementalHoareTripleChecker+Time [2021-11-12 22:58:44,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1029 Valid, 6842 Invalid, 1113 Unknown, 0 Unchecked, 16.32ms Time], IncrementalHoareTripleChecker [90 Valid, 1022 Invalid, 1 Unknown, 0 Unchecked, 3537.55ms Time] [2021-11-12 22:58:44,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61148 states. [2021-11-12 22:58:48,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61148 to 58788. [2021-11-12 22:58:48,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58788 states, 42908 states have (on average 1.5263820266616948) internal successors, (65494), 45246 states have internal predecessors, (65494), 12581 states have call successors, (12581), 2979 states have call predecessors, (12581), 3298 states have return successors, (30165), 12594 states have call predecessors, (30165), 12483 states have call successors, (30165) [2021-11-12 22:58:49,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58788 states to 58788 states and 108240 transitions. [2021-11-12 22:58:49,552 INFO L78 Accepts]: Start accepts. Automaton has 58788 states and 108240 transitions. Word has length 171 [2021-11-12 22:58:49,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:58:49,552 INFO L470 AbstractCegarLoop]: Abstraction has 58788 states and 108240 transitions. [2021-11-12 22:58:49,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 6 states have internal predecessors, (116), 3 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-12 22:58:49,553 INFO L276 IsEmpty]: Start isEmpty. Operand 58788 states and 108240 transitions. [2021-11-12 22:58:49,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-11-12 22:58:49,558 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:58:49,558 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:58:49,578 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-12 22:58:49,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:58:49,760 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:58:49,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:58:49,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1412754085, now seen corresponding path program 1 times [2021-11-12 22:58:49,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:58:49,762 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1483629600] [2021-11-12 22:58:49,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:58:49,762 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:58:49,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:58:49,763 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:58:49,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add432c4-2a13-4c71-aae9-38287391bc1a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-12 22:58:50,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:58:50,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 989 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:58:50,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:58:51,344 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-12 22:58:51,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:58:51,902 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-12 22:58:51,903 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:58:51,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1483629600] [2021-11-12 22:58:51,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1483629600] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:58:51,903 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:58:51,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2021-11-12 22:58:51,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400744876] [2021-11-12 22:58:51,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:58:51,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:58:51,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:58:51,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:58:51,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:58:51,907 INFO L87 Difference]: Start difference. First operand 58788 states and 108240 transitions. Second operand has 5 states, 5 states have (on average 22.8) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-12 22:58:53,939 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:58:55,945 WARN L515 Checker$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 22:59:02,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:59:02,301 INFO L93 Difference]: Finished difference Result 113140 states and 215065 transitions. [2021-11-12 22:59:02,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:59:02,303 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.8) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 171 [2021-11-12 22:59:02,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted.