./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec9_product30.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec9_product30.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1493e9da3ad278988eda47a556733ebc5ac5411d3350d76fb478293d9e5d934e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 13:37:34,375 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 13:37:34,377 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 13:37:34,408 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 13:37:34,409 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 13:37:34,410 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 13:37:34,412 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 13:37:34,420 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 13:37:34,423 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 13:37:34,429 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 13:37:34,430 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 13:37:34,432 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 13:37:34,432 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 13:37:34,435 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 13:37:34,437 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 13:37:34,439 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 13:37:34,441 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 13:37:34,443 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 13:37:34,449 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 13:37:34,457 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 13:37:34,459 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 13:37:34,462 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 13:37:34,464 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 13:37:34,465 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 13:37:34,468 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 13:37:34,469 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 13:37:34,469 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 13:37:34,471 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 13:37:34,471 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 13:37:34,473 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 13:37:34,473 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 13:37:34,474 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 13:37:34,475 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 13:37:34,476 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 13:37:34,477 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 13:37:34,478 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 13:37:34,479 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 13:37:34,479 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 13:37:34,479 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 13:37:34,480 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 13:37:34,481 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 13:37:34,482 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 13:37:34,508 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 13:37:34,508 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 13:37:34,509 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 13:37:34,510 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 13:37:34,510 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 13:37:34,510 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 13:37:34,510 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 13:37:34,511 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 13:37:34,511 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 13:37:34,511 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 13:37:34,511 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 13:37:34,512 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 13:37:34,512 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 13:37:34,512 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 13:37:34,513 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 13:37:34,513 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 13:37:34,514 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 13:37:34,514 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 13:37:34,514 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 13:37:34,514 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 13:37:34,515 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 13:37:34,515 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 13:37:34,515 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 13:37:34,515 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 13:37:34,516 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 13:37:34,516 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 13:37:34,516 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 13:37:34,516 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 13:37:34,517 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 13:37:34,517 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 13:37:34,517 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 13:37:34,517 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:37:34,518 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 13:37:34,518 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 13:37:34,518 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 13:37:34,518 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 13:37:34,519 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 13:37:34,519 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 13:37:34,519 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 13:37:34,519 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 13:37:34,520 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_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1493e9da3ad278988eda47a556733ebc5ac5411d3350d76fb478293d9e5d934e [2021-11-19 13:37:34,863 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 13:37:34,885 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 13:37:34,887 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 13:37:34,889 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 13:37:34,890 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 13:37:34,891 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec9_product30.cil.c [2021-11-19 13:37:34,962 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/data/c6ad819c7/35e8f39fdb0b449794042ae4458fd577/FLAGa5520c666 [2021-11-19 13:37:35,758 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 13:37:35,759 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/sv-benchmarks/c/product-lines/elevator_spec9_product30.cil.c [2021-11-19 13:37:35,800 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/data/c6ad819c7/35e8f39fdb0b449794042ae4458fd577/FLAGa5520c666 [2021-11-19 13:37:35,874 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/data/c6ad819c7/35e8f39fdb0b449794042ae4458fd577 [2021-11-19 13:37:35,878 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 13:37:35,881 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 13:37:35,884 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 13:37:35,885 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 13:37:35,891 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 13:37:35,891 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:37:35" (1/1) ... [2021-11-19 13:37:35,892 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57659e36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:37:35, skipping insertion in model container [2021-11-19 13:37:35,893 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:37:35" (1/1) ... [2021-11-19 13:37:35,911 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 13:37:36,006 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:37:36,341 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/sv-benchmarks/c/product-lines/elevator_spec9_product30.cil.c[11768,11781] [2021-11-19 13:37:36,721 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:37:36,743 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-19 13:37:36,744 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@27197d48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:37:36, skipping insertion in model container [2021-11-19 13:37:36,745 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 13:37:36,745 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 13:37:36,748 INFO L158 Benchmark]: Toolchain (without parser) took 865.44ms. Allocated memory was 107.0MB in the beginning and 130.0MB in the end (delta: 23.1MB). Free memory was 72.6MB in the beginning and 90.5MB in the end (delta: -17.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-19 13:37:36,750 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 107.0MB. Free memory was 60.3MB in the beginning and 60.2MB in the end (delta: 84.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 13:37:36,752 INFO L158 Benchmark]: CACSL2BoogieTranslator took 860.64ms. Allocated memory was 107.0MB in the beginning and 130.0MB in the end (delta: 23.1MB). Free memory was 72.3MB in the beginning and 90.5MB in the end (delta: -18.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-19 13:37:36,755 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 107.0MB. Free memory was 60.3MB in the beginning and 60.2MB in the end (delta: 84.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 860.64ms. Allocated memory was 107.0MB in the beginning and 130.0MB in the end (delta: 23.1MB). Free memory was 72.3MB in the beginning and 90.5MB in the end (delta: -18.3MB). Peak memory consumption was 14.7MB. 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_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec9_product30.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1493e9da3ad278988eda47a556733ebc5ac5411d3350d76fb478293d9e5d934e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 13:37:39,219 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 13:37:39,222 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 13:37:39,254 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 13:37:39,254 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 13:37:39,256 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 13:37:39,258 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 13:37:39,260 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 13:37:39,262 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 13:37:39,263 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 13:37:39,265 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 13:37:39,266 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 13:37:39,267 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 13:37:39,268 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 13:37:39,270 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 13:37:39,272 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 13:37:39,273 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 13:37:39,274 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 13:37:39,277 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 13:37:39,281 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 13:37:39,283 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 13:37:39,285 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 13:37:39,287 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 13:37:39,288 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 13:37:39,292 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 13:37:39,292 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 13:37:39,293 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 13:37:39,294 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 13:37:39,295 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 13:37:39,296 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 13:37:39,296 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 13:37:39,297 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 13:37:39,298 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 13:37:39,299 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 13:37:39,301 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 13:37:39,301 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 13:37:39,302 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 13:37:39,302 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 13:37:39,318 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 13:37:39,319 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 13:37:39,320 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 13:37:39,325 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 13:37:39,374 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 13:37:39,375 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 13:37:39,377 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 13:37:39,377 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 13:37:39,377 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 13:37:39,378 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 13:37:39,378 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 13:37:39,378 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 13:37:39,378 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 13:37:39,379 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 13:37:39,381 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 13:37:39,381 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 13:37:39,382 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 13:37:39,382 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 13:37:39,382 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 13:37:39,382 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 13:37:39,383 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 13:37:39,383 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 13:37:39,383 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 13:37:39,384 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 13:37:39,384 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 13:37:39,384 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 13:37:39,384 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 13:37:39,385 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 13:37:39,385 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 13:37:39,385 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 13:37:39,386 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 13:37:39,386 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:37:39,386 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 13:37:39,386 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 13:37:39,387 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 13:37:39,387 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 13:37:39,387 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 13:37:39,387 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 13:37:39,388 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 13:37:39,388 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 13:37:39,389 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_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1493e9da3ad278988eda47a556733ebc5ac5411d3350d76fb478293d9e5d934e [2021-11-19 13:37:39,830 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 13:37:39,863 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 13:37:39,866 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 13:37:39,868 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 13:37:39,869 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 13:37:39,870 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec9_product30.cil.c [2021-11-19 13:37:39,958 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/data/1e930e7be/aca32160cafe4e39bf0e566d1db3f762/FLAGb2b4b24a8 [2021-11-19 13:37:40,734 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 13:37:40,734 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/sv-benchmarks/c/product-lines/elevator_spec9_product30.cil.c [2021-11-19 13:37:40,762 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/data/1e930e7be/aca32160cafe4e39bf0e566d1db3f762/FLAGb2b4b24a8 [2021-11-19 13:37:40,972 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/data/1e930e7be/aca32160cafe4e39bf0e566d1db3f762 [2021-11-19 13:37:40,975 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 13:37:40,977 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 13:37:40,979 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 13:37:40,980 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 13:37:40,988 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 13:37:40,989 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:37:40" (1/1) ... [2021-11-19 13:37:40,990 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ac6fcd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:37:40, skipping insertion in model container [2021-11-19 13:37:40,991 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:37:40" (1/1) ... [2021-11-19 13:37:41,001 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 13:37:41,137 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:37:41,491 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/sv-benchmarks/c/product-lines/elevator_spec9_product30.cil.c[11768,11781] [2021-11-19 13:37:41,804 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:37:41,819 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 13:37:41,841 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:37:41,863 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/sv-benchmarks/c/product-lines/elevator_spec9_product30.cil.c[11768,11781] [2021-11-19 13:37:42,018 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:37:42,032 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 13:37:42,085 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/sv-benchmarks/c/product-lines/elevator_spec9_product30.cil.c[11768,11781] [2021-11-19 13:37:42,203 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:37:42,242 INFO L208 MainTranslator]: Completed translation [2021-11-19 13:37:42,243 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:37:42 WrapperNode [2021-11-19 13:37:42,243 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 13:37:42,245 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 13:37:42,245 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 13:37:42,245 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 13:37:42,253 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:37:42" (1/1) ... [2021-11-19 13:37:42,322 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:37:42" (1/1) ... [2021-11-19 13:37:42,376 INFO L137 Inliner]: procedures = 97, calls = 344, calls flagged for inlining = 27, calls inlined = 23, statements flattened = 825 [2021-11-19 13:37:42,377 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 13:37:42,377 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 13:37:42,377 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 13:37:42,401 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 13:37:42,411 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:37:42" (1/1) ... [2021-11-19 13:37:42,411 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:37:42" (1/1) ... [2021-11-19 13:37:42,419 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:37:42" (1/1) ... [2021-11-19 13:37:42,419 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:37:42" (1/1) ... [2021-11-19 13:37:42,448 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:37:42" (1/1) ... [2021-11-19 13:37:42,478 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:37:42" (1/1) ... [2021-11-19 13:37:42,483 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:37:42" (1/1) ... [2021-11-19 13:37:42,497 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 13:37:42,500 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 13:37:42,501 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 13:37:42,502 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 13:37:42,503 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:37:42" (1/1) ... [2021-11-19 13:37:42,513 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:37:42,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:37:42,543 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 13:37:42,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 13:37:42,602 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 13:37:42,603 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-19 13:37:42,604 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-19 13:37:42,604 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-19 13:37:42,604 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-19 13:37:42,604 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-19 13:37:42,604 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-19 13:37:42,604 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-19 13:37:42,605 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-19 13:37:42,605 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-19 13:37:42,605 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-19 13:37:42,605 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2021-11-19 13:37:42,605 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2021-11-19 13:37:42,605 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-19 13:37:42,605 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-19 13:37:42,606 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-19 13:37:42,606 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-19 13:37:42,606 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-19 13:37:42,606 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-19 13:37:42,606 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-19 13:37:42,607 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-19 13:37:42,607 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-19 13:37:42,607 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-19 13:37:42,607 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-19 13:37:42,607 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-19 13:37:42,607 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-19 13:37:42,607 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-19 13:37:42,608 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 13:37:42,608 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-19 13:37:42,608 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-19 13:37:42,608 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-19 13:37:42,609 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-19 13:37:42,609 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-19 13:37:42,609 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-19 13:37:42,610 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-19 13:37:42,610 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-19 13:37:42,610 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-19 13:37:42,610 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-19 13:37:42,611 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-19 13:37:42,611 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-19 13:37:42,611 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2021-11-19 13:37:42,611 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2021-11-19 13:37:42,611 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-19 13:37:42,611 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-19 13:37:42,612 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-19 13:37:42,612 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-19 13:37:42,612 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-19 13:37:42,613 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-19 13:37:42,613 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-19 13:37:42,614 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-19 13:37:42,615 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__twothirdsfull [2021-11-19 13:37:42,616 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__twothirdsfull [2021-11-19 13:37:42,616 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 13:37:42,616 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 13:37:42,617 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-19 13:37:42,617 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-19 13:37:42,801 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 13:37:42,803 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 13:37:44,362 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 13:37:44,388 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 13:37:44,388 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 13:37:44,393 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:37:44 BoogieIcfgContainer [2021-11-19 13:37:44,393 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 13:37:44,396 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 13:37:44,397 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 13:37:44,400 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 13:37:44,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 01:37:40" (1/3) ... [2021-11-19 13:37:44,402 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4801057c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:37:44, skipping insertion in model container [2021-11-19 13:37:44,402 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:37:42" (2/3) ... [2021-11-19 13:37:44,403 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4801057c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:37:44, skipping insertion in model container [2021-11-19 13:37:44,403 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:37:44" (3/3) ... [2021-11-19 13:37:44,405 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec9_product30.cil.c [2021-11-19 13:37:44,413 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 13:37:44,413 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 13:37:44,495 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 13:37:44,507 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 13:37:44,507 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 13:37:44,547 INFO L276 IsEmpty]: Start isEmpty. Operand has 576 states, 452 states have (on average 1.6924778761061947) internal successors, (765), 475 states have internal predecessors, (765), 96 states have call successors, (96), 26 states have call predecessors, (96), 26 states have return successors, (96), 89 states have call predecessors, (96), 96 states have call successors, (96) [2021-11-19 13:37:44,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-19 13:37:44,566 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:37:44,567 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:37:44,567 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:37:44,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:37:44,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1316381237, now seen corresponding path program 1 times [2021-11-19 13:37:44,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:37:44,595 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1236647669] [2021-11-19 13:37:44,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:37:44,601 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:37:44,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:37:44,615 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:37:44,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 13:37:45,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:37:45,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 679 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-19 13:37:45,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:37:45,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:37:45,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:37:45,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:37:45,493 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:37:45,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1236647669] [2021-11-19 13:37:45,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1236647669] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:37:45,495 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:37:45,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-19 13:37:45,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525295467] [2021-11-19 13:37:45,498 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:37:45,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 13:37:45,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:37:45,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 13:37:45,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 13:37:45,543 INFO L87 Difference]: Start difference. First operand has 576 states, 452 states have (on average 1.6924778761061947) internal successors, (765), 475 states have internal predecessors, (765), 96 states have call successors, (96), 26 states have call predecessors, (96), 26 states have return successors, (96), 89 states have call predecessors, (96), 96 states have call successors, (96) Second operand has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-19 13:37:45,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:37:45,668 INFO L93 Difference]: Finished difference Result 597 states and 987 transitions. [2021-11-19 13:37:45,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 13:37:45,672 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 62 [2021-11-19 13:37:45,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:37:45,709 INFO L225 Difference]: With dead ends: 597 [2021-11-19 13:37:45,710 INFO L226 Difference]: Without dead ends: 568 [2021-11-19 13:37:45,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 13:37:45,723 INFO L933 BasicCegarLoop]: 948 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 948 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:37:45,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 948 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:37:45,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-11-19 13:37:45,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 568. [2021-11-19 13:37:45,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 446 states have (on average 1.6905829596412556) internal successors, (754), 467 states have internal predecessors, (754), 96 states have call successors, (96), 26 states have call predecessors, (96), 25 states have return successors, (91), 88 states have call predecessors, (91), 91 states have call successors, (91) [2021-11-19 13:37:45,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 941 transitions. [2021-11-19 13:37:45,885 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 941 transitions. Word has length 62 [2021-11-19 13:37:45,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:37:45,886 INFO L470 AbstractCegarLoop]: Abstraction has 568 states and 941 transitions. [2021-11-19 13:37:45,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-19 13:37:45,887 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 941 transitions. [2021-11-19 13:37:45,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-19 13:37:45,895 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:37:45,895 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:37:45,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 13:37:46,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:37:46,111 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:37:46,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:37:46,112 INFO L85 PathProgramCache]: Analyzing trace with hash 61497577, now seen corresponding path program 1 times [2021-11-19 13:37:46,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:37:46,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2004390646] [2021-11-19 13:37:46,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:37:46,113 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:37:46,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:37:46,131 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:37:46,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 13:37:46,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:37:46,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:37:46,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:37:46,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:37:46,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:37:47,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:37:47,009 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:37:47,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2004390646] [2021-11-19 13:37:47,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2004390646] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:37:47,010 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:37:47,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 13:37:47,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353056070] [2021-11-19 13:37:47,011 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:37:47,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 13:37:47,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:37:47,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 13:37:47,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:37:47,014 INFO L87 Difference]: Start difference. First operand 568 states and 941 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 13:37:47,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:37:47,187 INFO L93 Difference]: Finished difference Result 1120 states and 1860 transitions. [2021-11-19 13:37:47,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:37:47,187 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 64 [2021-11-19 13:37:47,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:37:47,196 INFO L225 Difference]: With dead ends: 1120 [2021-11-19 13:37:47,200 INFO L226 Difference]: Without dead ends: 568 [2021-11-19 13:37:47,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-19 13:37:47,211 INFO L933 BasicCegarLoop]: 928 mSDtfsCounter, 15 mSDsluCounter, 2777 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 3705 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:37:47,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 3705 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:37:47,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-11-19 13:37:47,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 568. [2021-11-19 13:37:47,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 446 states have (on average 1.6771300448430493) internal successors, (748), 467 states have internal predecessors, (748), 96 states have call successors, (96), 26 states have call predecessors, (96), 25 states have return successors, (91), 88 states have call predecessors, (91), 91 states have call successors, (91) [2021-11-19 13:37:47,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 935 transitions. [2021-11-19 13:37:47,273 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 935 transitions. Word has length 64 [2021-11-19 13:37:47,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:37:47,274 INFO L470 AbstractCegarLoop]: Abstraction has 568 states and 935 transitions. [2021-11-19 13:37:47,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 13:37:47,274 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 935 transitions. [2021-11-19 13:37:47,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-19 13:37:47,281 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:37:47,281 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:37:47,308 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-19 13:37:47,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:37:47,500 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:37:47,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:37:47,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1984723350, now seen corresponding path program 1 times [2021-11-19 13:37:47,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:37:47,502 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1373318884] [2021-11-19 13:37:47,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:37:47,502 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:37:47,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:37:47,504 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:37:47,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 13:37:47,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:37:47,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 686 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 13:37:47,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:37:48,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:37:48,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:37:48,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:37:48,524 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:37:48,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1373318884] [2021-11-19 13:37:48,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1373318884] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:37:48,525 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:37:48,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 13:37:48,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153628164] [2021-11-19 13:37:48,525 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:37:48,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 13:37:48,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:37:48,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 13:37:48,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 13:37:48,527 INFO L87 Difference]: Start difference. First operand 568 states and 935 transitions. Second operand has 11 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 4 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-19 13:37:48,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:37:48,719 INFO L93 Difference]: Finished difference Result 1078 states and 1777 transitions. [2021-11-19 13:37:48,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:37:48,720 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 4 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 69 [2021-11-19 13:37:48,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:37:48,728 INFO L225 Difference]: With dead ends: 1078 [2021-11-19 13:37:48,728 INFO L226 Difference]: Without dead ends: 562 [2021-11-19 13:37:48,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-19 13:37:48,734 INFO L933 BasicCegarLoop]: 922 mSDtfsCounter, 214 mSDsluCounter, 4589 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 5511 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:37:48,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 5511 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:37:48,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-11-19 13:37:48,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 562. [2021-11-19 13:37:48,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 440 states have (on average 1.6704545454545454) internal successors, (735), 461 states have internal predecessors, (735), 96 states have call successors, (96), 26 states have call predecessors, (96), 25 states have return successors, (91), 88 states have call predecessors, (91), 91 states have call successors, (91) [2021-11-19 13:37:48,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 922 transitions. [2021-11-19 13:37:48,774 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 922 transitions. Word has length 69 [2021-11-19 13:37:48,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:37:48,775 INFO L470 AbstractCegarLoop]: Abstraction has 562 states and 922 transitions. [2021-11-19 13:37:48,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 4 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-19 13:37:48,776 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 922 transitions. [2021-11-19 13:37:48,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-19 13:37:48,781 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:37:48,782 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:37:48,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 13:37:48,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:37:48,993 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:37:48,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:37:48,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1693135546, now seen corresponding path program 1 times [2021-11-19 13:37:48,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:37:48,995 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1479270742] [2021-11-19 13:37:48,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:37:48,996 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:37:48,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:37:48,998 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:37:49,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 13:37:49,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:37:49,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 687 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:37:49,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:37:49,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:37:49,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:37:49,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:37:49,912 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:37:49,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1479270742] [2021-11-19 13:37:49,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1479270742] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:37:49,913 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:37:49,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 13:37:49,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362691895] [2021-11-19 13:37:49,914 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:37:49,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 13:37:49,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:37:49,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 13:37:49,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:37:49,916 INFO L87 Difference]: Start difference. First operand 562 states and 922 transitions. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 2 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-19 13:37:50,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:37:50,126 INFO L93 Difference]: Finished difference Result 1081 states and 1778 transitions. [2021-11-19 13:37:50,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:37:50,126 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 2 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 70 [2021-11-19 13:37:50,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:37:50,133 INFO L225 Difference]: With dead ends: 1081 [2021-11-19 13:37:50,133 INFO L226 Difference]: Without dead ends: 562 [2021-11-19 13:37:50,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-19 13:37:50,138 INFO L933 BasicCegarLoop]: 873 mSDtfsCounter, 174 mSDsluCounter, 1733 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 2606 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:37:50,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 2606 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:37:50,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-11-19 13:37:50,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 562. [2021-11-19 13:37:50,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 440 states have (on average 1.615909090909091) internal successors, (711), 461 states have internal predecessors, (711), 96 states have call successors, (96), 26 states have call predecessors, (96), 25 states have return successors, (91), 88 states have call predecessors, (91), 91 states have call successors, (91) [2021-11-19 13:37:50,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 898 transitions. [2021-11-19 13:37:50,172 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 898 transitions. Word has length 70 [2021-11-19 13:37:50,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:37:50,172 INFO L470 AbstractCegarLoop]: Abstraction has 562 states and 898 transitions. [2021-11-19 13:37:50,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 2 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-19 13:37:50,173 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 898 transitions. [2021-11-19 13:37:50,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-19 13:37:50,175 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:37:50,175 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:37:50,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 13:37:50,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:37:50,392 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:37:50,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:37:50,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1273587499, now seen corresponding path program 1 times [2021-11-19 13:37:50,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:37:50,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1715493463] [2021-11-19 13:37:50,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:37:50,393 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:37:50,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:37:50,395 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:37:50,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 13:37:50,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:37:50,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 688 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 13:37:50,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:37:50,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:37:50,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:37:51,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:37:51,192 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:37:51,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1715493463] [2021-11-19 13:37:51,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1715493463] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:37:51,192 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:37:51,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-19 13:37:51,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755633926] [2021-11-19 13:37:51,193 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:37:51,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 13:37:51,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:37:51,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 13:37:51,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-19 13:37:51,194 INFO L87 Difference]: Start difference. First operand 562 states and 898 transitions. Second operand has 8 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-19 13:37:51,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:37:51,358 INFO L93 Difference]: Finished difference Result 1072 states and 1740 transitions. [2021-11-19 13:37:51,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:37:51,360 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 72 [2021-11-19 13:37:51,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:37:51,366 INFO L225 Difference]: With dead ends: 1072 [2021-11-19 13:37:51,366 INFO L226 Difference]: Without dead ends: 541 [2021-11-19 13:37:51,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:37:51,371 INFO L933 BasicCegarLoop]: 886 mSDtfsCounter, 89 mSDsluCounter, 5215 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 6101 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:37:51,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 6101 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:37:51,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2021-11-19 13:37:51,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 541. [2021-11-19 13:37:51,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 419 states have (on average 1.6372315035799523) internal successors, (686), 440 states have internal predecessors, (686), 96 states have call successors, (96), 26 states have call predecessors, (96), 25 states have return successors, (91), 88 states have call predecessors, (91), 91 states have call successors, (91) [2021-11-19 13:37:51,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 873 transitions. [2021-11-19 13:37:51,403 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 873 transitions. Word has length 72 [2021-11-19 13:37:51,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:37:51,403 INFO L470 AbstractCegarLoop]: Abstraction has 541 states and 873 transitions. [2021-11-19 13:37:51,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-19 13:37:51,404 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 873 transitions. [2021-11-19 13:37:51,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-19 13:37:51,406 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:37:51,406 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:37:51,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 13:37:51,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:37:51,623 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:37:51,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:37:51,624 INFO L85 PathProgramCache]: Analyzing trace with hash -655552937, now seen corresponding path program 1 times [2021-11-19 13:37:51,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:37:51,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1247160339] [2021-11-19 13:37:51,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:37:51,625 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:37:51,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:37:51,626 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:37:51,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 13:37:51,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:37:51,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 692 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 13:37:51,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:37:52,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:37:52,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:37:52,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:37:52,753 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:37:52,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1247160339] [2021-11-19 13:37:52,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1247160339] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:37:52,753 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:37:52,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 13:37:52,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071971356] [2021-11-19 13:37:52,754 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:37:52,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 13:37:52,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:37:52,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 13:37:52,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 13:37:52,756 INFO L87 Difference]: Start difference. First operand 541 states and 873 transitions. Second operand has 13 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 4 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-19 13:37:53,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:37:53,002 INFO L93 Difference]: Finished difference Result 1045 states and 1704 transitions. [2021-11-19 13:37:53,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 13:37:53,003 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 4 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 75 [2021-11-19 13:37:53,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:37:53,010 INFO L225 Difference]: With dead ends: 1045 [2021-11-19 13:37:53,010 INFO L226 Difference]: Without dead ends: 541 [2021-11-19 13:37:53,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-19 13:37:53,016 INFO L933 BasicCegarLoop]: 858 mSDtfsCounter, 46 mSDsluCounter, 5127 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 5985 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:37:53,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 5985 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:37:53,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2021-11-19 13:37:53,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 541. [2021-11-19 13:37:53,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 419 states have (on average 1.6348448687350836) internal successors, (685), 440 states have internal predecessors, (685), 96 states have call successors, (96), 26 states have call predecessors, (96), 25 states have return successors, (91), 88 states have call predecessors, (91), 91 states have call successors, (91) [2021-11-19 13:37:53,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 872 transitions. [2021-11-19 13:37:53,048 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 872 transitions. Word has length 75 [2021-11-19 13:37:53,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:37:53,049 INFO L470 AbstractCegarLoop]: Abstraction has 541 states and 872 transitions. [2021-11-19 13:37:53,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 4 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-19 13:37:53,049 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 872 transitions. [2021-11-19 13:37:53,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-19 13:37:53,052 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:37:53,052 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:37:53,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 13:37:53,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:37:53,271 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:37:53,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:37:53,271 INFO L85 PathProgramCache]: Analyzing trace with hash -21779899, now seen corresponding path program 1 times [2021-11-19 13:37:53,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:37:53,272 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1627559736] [2021-11-19 13:37:53,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:37:53,272 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:37:53,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:37:53,273 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:37:53,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 13:37:53,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:37:53,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 693 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 13:37:53,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:37:54,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:37:54,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:37:54,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:37:54,827 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:37:54,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1627559736] [2021-11-19 13:37:54,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1627559736] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:37:54,827 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:37:54,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 10 [2021-11-19 13:37:54,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656168266] [2021-11-19 13:37:54,828 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:37:54,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 13:37:54,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:37:54,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 13:37:54,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-19 13:37:54,830 INFO L87 Difference]: Start difference. First operand 541 states and 872 transitions. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 8 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) [2021-11-19 13:38:03,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:38:03,929 INFO L93 Difference]: Finished difference Result 2717 states and 4517 transitions. [2021-11-19 13:38:03,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-19 13:38:03,931 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 8 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) Word has length 76 [2021-11-19 13:38:03,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:38:03,957 INFO L225 Difference]: With dead ends: 2717 [2021-11-19 13:38:03,957 INFO L226 Difference]: Without dead ends: 2221 [2021-11-19 13:38:03,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-11-19 13:38:03,964 INFO L933 BasicCegarLoop]: 1573 mSDtfsCounter, 7833 mSDsluCounter, 1524 mSDsCounter, 0 mSdLazyCounter, 4355 mSolverCounterSat, 2133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8007 SdHoareTripleChecker+Valid, 3097 SdHoareTripleChecker+Invalid, 6488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2133 IncrementalHoareTripleChecker+Valid, 4355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2021-11-19 13:38:03,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8007 Valid, 3097 Invalid, 6488 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2133 Valid, 4355 Invalid, 0 Unknown, 0 Unchecked, 8.6s Time] [2021-11-19 13:38:03,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2221 states. [2021-11-19 13:38:04,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2221 to 2033. [2021-11-19 13:38:04,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2033 states, 1572 states have (on average 1.671119592875318) internal successors, (2627), 1637 states have internal predecessors, (2627), 375 states have call successors, (375), 82 states have call predecessors, (375), 85 states have return successors, (383), 340 states have call predecessors, (383), 370 states have call successors, (383) [2021-11-19 13:38:04,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2033 states to 2033 states and 3385 transitions. [2021-11-19 13:38:04,126 INFO L78 Accepts]: Start accepts. Automaton has 2033 states and 3385 transitions. Word has length 76 [2021-11-19 13:38:04,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:38:04,127 INFO L470 AbstractCegarLoop]: Abstraction has 2033 states and 3385 transitions. [2021-11-19 13:38:04,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 8 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) [2021-11-19 13:38:04,128 INFO L276 IsEmpty]: Start isEmpty. Operand 2033 states and 3385 transitions. [2021-11-19 13:38:04,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-19 13:38:04,134 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:38:04,134 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:38:04,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 13:38:04,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:38:04,367 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:38:04,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:38:04,368 INFO L85 PathProgramCache]: Analyzing trace with hash 295445077, now seen corresponding path program 1 times [2021-11-19 13:38:04,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:38:04,369 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [378132937] [2021-11-19 13:38:04,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:38:04,369 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:38:04,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:38:04,370 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:38:04,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 13:38:04,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:38:04,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 878 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 13:38:04,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:38:05,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:38:05,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:38:05,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:38:05,823 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:38:05,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [378132937] [2021-11-19 13:38:05,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [378132937] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:38:05,823 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:38:05,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 13:38:05,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964036077] [2021-11-19 13:38:05,824 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:38:05,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 13:38:05,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:38:05,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 13:38:05,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-19 13:38:05,825 INFO L87 Difference]: Start difference. First operand 2033 states and 3385 transitions. Second operand has 13 states, 13 states have (on average 9.692307692307692) internal successors, (126), 11 states have internal predecessors, (126), 7 states have call successors, (20), 5 states have call predecessors, (20), 5 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) [2021-11-19 13:38:15,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:38:15,109 INFO L93 Difference]: Finished difference Result 5370 states and 8950 transitions. [2021-11-19 13:38:15,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-19 13:38:15,121 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 9.692307692307692) internal successors, (126), 11 states have internal predecessors, (126), 7 states have call successors, (20), 5 states have call predecessors, (20), 5 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) Word has length 114 [2021-11-19 13:38:15,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:38:15,153 INFO L225 Difference]: With dead ends: 5370 [2021-11-19 13:38:15,154 INFO L226 Difference]: Without dead ends: 3382 [2021-11-19 13:38:15,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=198, Invalid=794, Unknown=0, NotChecked=0, Total=992 [2021-11-19 13:38:15,192 INFO L933 BasicCegarLoop]: 1776 mSDtfsCounter, 3011 mSDsluCounter, 3210 mSDsCounter, 0 mSdLazyCounter, 7334 mSolverCounterSat, 969 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3098 SdHoareTripleChecker+Valid, 4986 SdHoareTripleChecker+Invalid, 8303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 969 IncrementalHoareTripleChecker+Valid, 7334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2021-11-19 13:38:15,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3098 Valid, 4986 Invalid, 8303 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [969 Valid, 7334 Invalid, 0 Unknown, 0 Unchecked, 8.6s Time] [2021-11-19 13:38:15,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3382 states. [2021-11-19 13:38:15,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3382 to 2910. [2021-11-19 13:38:15,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2910 states, 2208 states have (on average 1.6376811594202898) internal successors, (3616), 2299 states have internal predecessors, (3616), 566 states have call successors, (566), 119 states have call predecessors, (566), 135 states have return successors, (602), 524 states have call predecessors, (602), 561 states have call successors, (602) [2021-11-19 13:38:15,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2910 states to 2910 states and 4784 transitions. [2021-11-19 13:38:15,415 INFO L78 Accepts]: Start accepts. Automaton has 2910 states and 4784 transitions. Word has length 114 [2021-11-19 13:38:15,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:38:15,416 INFO L470 AbstractCegarLoop]: Abstraction has 2910 states and 4784 transitions. [2021-11-19 13:38:15,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.692307692307692) internal successors, (126), 11 states have internal predecessors, (126), 7 states have call successors, (20), 5 states have call predecessors, (20), 5 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) [2021-11-19 13:38:15,416 INFO L276 IsEmpty]: Start isEmpty. Operand 2910 states and 4784 transitions. [2021-11-19 13:38:15,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-19 13:38:15,421 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:38:15,421 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:38:15,441 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 13:38:15,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:38:15,641 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:38:15,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:38:15,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1863411271, now seen corresponding path program 1 times [2021-11-19 13:38:15,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:38:15,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [234866716] [2021-11-19 13:38:15,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:38:15,642 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:38:15,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:38:15,643 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:38:15,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 13:38:16,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:38:16,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 879 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-19 13:38:16,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:38:16,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:38:16,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:38:17,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:38:17,377 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:38:17,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [234866716] [2021-11-19 13:38:17,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [234866716] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:38:17,378 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:38:17,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 8] imperfect sequences [] total 14 [2021-11-19 13:38:17,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436102055] [2021-11-19 13:38:17,378 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:38:17,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 13:38:17,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:38:17,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 13:38:17,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-11-19 13:38:17,381 INFO L87 Difference]: Start difference. First operand 2910 states and 4784 transitions. Second operand has 14 states, 14 states have (on average 11.0) internal successors, (154), 12 states have internal predecessors, (154), 8 states have call successors, (27), 5 states have call predecessors, (27), 8 states have return successors, (26), 10 states have call predecessors, (26), 7 states have call successors, (26) [2021-11-19 13:38:20,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:38:20,800 INFO L93 Difference]: Finished difference Result 6566 states and 11007 transitions. [2021-11-19 13:38:20,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:38:20,801 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 11.0) internal successors, (154), 12 states have internal predecessors, (154), 8 states have call successors, (27), 5 states have call predecessors, (27), 8 states have return successors, (26), 10 states have call predecessors, (26), 7 states have call successors, (26) Word has length 115 [2021-11-19 13:38:20,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:38:20,836 INFO L225 Difference]: With dead ends: 6566 [2021-11-19 13:38:20,837 INFO L226 Difference]: Without dead ends: 3701 [2021-11-19 13:38:20,861 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-11-19 13:38:20,861 INFO L933 BasicCegarLoop]: 910 mSDtfsCounter, 2066 mSDsluCounter, 1342 mSDsCounter, 0 mSdLazyCounter, 2779 mSolverCounterSat, 693 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2066 SdHoareTripleChecker+Valid, 2252 SdHoareTripleChecker+Invalid, 3472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 693 IncrementalHoareTripleChecker+Valid, 2779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:38:20,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2066 Valid, 2252 Invalid, 3472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [693 Valid, 2779 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-11-19 13:38:20,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3701 states. [2021-11-19 13:38:21,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3701 to 2934. [2021-11-19 13:38:21,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2934 states, 2226 states have (on average 1.632524707996406) internal successors, (3634), 2317 states have internal predecessors, (3634), 566 states have call successors, (566), 119 states have call predecessors, (566), 141 states have return successors, (668), 530 states have call predecessors, (668), 561 states have call successors, (668) [2021-11-19 13:38:21,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2934 states to 2934 states and 4868 transitions. [2021-11-19 13:38:21,114 INFO L78 Accepts]: Start accepts. Automaton has 2934 states and 4868 transitions. Word has length 115 [2021-11-19 13:38:21,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:38:21,116 INFO L470 AbstractCegarLoop]: Abstraction has 2934 states and 4868 transitions. [2021-11-19 13:38:21,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.0) internal successors, (154), 12 states have internal predecessors, (154), 8 states have call successors, (27), 5 states have call predecessors, (27), 8 states have return successors, (26), 10 states have call predecessors, (26), 7 states have call successors, (26) [2021-11-19 13:38:21,116 INFO L276 IsEmpty]: Start isEmpty. Operand 2934 states and 4868 transitions. [2021-11-19 13:38:21,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-19 13:38:21,124 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:38:21,124 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:38:21,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 13:38:21,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:38:21,337 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:38:21,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:38:21,337 INFO L85 PathProgramCache]: Analyzing trace with hash -813515636, now seen corresponding path program 1 times [2021-11-19 13:38:21,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:38:21,338 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1700471124] [2021-11-19 13:38:21,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:38:21,338 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:38:21,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:38:21,339 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:38:21,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 13:38:21,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:38:21,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 880 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 13:38:21,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:38:22,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:38:22,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:38:22,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:38:22,596 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:38:22,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1700471124] [2021-11-19 13:38:22,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1700471124] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:38:22,596 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:38:22,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 10 [2021-11-19 13:38:22,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073349498] [2021-11-19 13:38:22,596 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:38:22,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 13:38:22,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:38:22,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 13:38:22,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-19 13:38:22,597 INFO L87 Difference]: Start difference. First operand 2934 states and 4868 transitions. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 6 states have call successors, (22), 5 states have call predecessors, (22), 5 states have return successors, (20), 6 states have call predecessors, (20), 5 states have call successors, (20) [2021-11-19 13:38:28,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:38:28,550 INFO L93 Difference]: Finished difference Result 9627 states and 16435 transitions. [2021-11-19 13:38:28,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-19 13:38:28,552 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 6 states have call successors, (22), 5 states have call predecessors, (22), 5 states have return successors, (20), 6 states have call predecessors, (20), 5 states have call successors, (20) Word has length 116 [2021-11-19 13:38:28,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:38:28,665 INFO L225 Difference]: With dead ends: 9627 [2021-11-19 13:38:28,666 INFO L226 Difference]: Without dead ends: 6738 [2021-11-19 13:38:28,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2021-11-19 13:38:28,701 INFO L933 BasicCegarLoop]: 1429 mSDtfsCounter, 3394 mSDsluCounter, 2355 mSDsCounter, 0 mSdLazyCounter, 5011 mSolverCounterSat, 933 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3473 SdHoareTripleChecker+Valid, 3784 SdHoareTripleChecker+Invalid, 5944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 933 IncrementalHoareTripleChecker+Valid, 5011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2021-11-19 13:38:28,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3473 Valid, 3784 Invalid, 5944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [933 Valid, 5011 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2021-11-19 13:38:28,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6738 states. [2021-11-19 13:38:29,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6738 to 6342. [2021-11-19 13:38:29,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6342 states, 4792 states have (on average 1.6181135225375627) internal successors, (7754), 5010 states have internal predecessors, (7754), 1227 states have call successors, (1227), 286 states have call predecessors, (1227), 322 states have return successors, (1437), 1122 states have call predecessors, (1437), 1222 states have call successors, (1437) [2021-11-19 13:38:29,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6342 states to 6342 states and 10418 transitions. [2021-11-19 13:38:29,274 INFO L78 Accepts]: Start accepts. Automaton has 6342 states and 10418 transitions. Word has length 116 [2021-11-19 13:38:29,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:38:29,274 INFO L470 AbstractCegarLoop]: Abstraction has 6342 states and 10418 transitions. [2021-11-19 13:38:29,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 6 states have call successors, (22), 5 states have call predecessors, (22), 5 states have return successors, (20), 6 states have call predecessors, (20), 5 states have call successors, (20) [2021-11-19 13:38:29,275 INFO L276 IsEmpty]: Start isEmpty. Operand 6342 states and 10418 transitions. [2021-11-19 13:38:29,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-19 13:38:29,280 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:38:29,280 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 13:38:29,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 13:38:29,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:38:29,501 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:38:29,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:38:29,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1859421445, now seen corresponding path program 1 times [2021-11-19 13:38:29,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:38:29,502 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [146027318] [2021-11-19 13:38:29,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:38:29,502 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:38:29,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:38:29,504 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:38:29,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 13:38:29,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:38:29,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 884 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-19 13:38:29,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:38:32,143 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 13:38:32,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:38:37,756 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 13:38:37,756 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:38:37,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [146027318] [2021-11-19 13:38:37,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [146027318] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:38:37,756 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:38:37,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 6] imperfect sequences [] total 12 [2021-11-19 13:38:37,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950909240] [2021-11-19 13:38:37,757 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:38:37,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 13:38:37,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:38:37,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 13:38:37,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-11-19 13:38:37,759 INFO L87 Difference]: Start difference. First operand 6342 states and 10418 transitions. Second operand has 12 states, 12 states have (on average 14.25) internal successors, (171), 12 states have internal predecessors, (171), 9 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (28), 9 states have call predecessors, (28), 8 states have call successors, (28) [2021-11-19 13:38:47,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:38:47,949 INFO L93 Difference]: Finished difference Result 15854 states and 26237 transitions. [2021-11-19 13:38:47,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-19 13:38:47,951 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 14.25) internal successors, (171), 12 states have internal predecessors, (171), 9 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (28), 9 states have call predecessors, (28), 8 states have call successors, (28) Word has length 118 [2021-11-19 13:38:47,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:38:48,038 INFO L225 Difference]: With dead ends: 15854 [2021-11-19 13:38:48,038 INFO L226 Difference]: Without dead ends: 9557 [2021-11-19 13:38:48,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 224 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2021-11-19 13:38:48,067 INFO L933 BasicCegarLoop]: 1561 mSDtfsCounter, 5114 mSDsluCounter, 2432 mSDsCounter, 0 mSdLazyCounter, 6857 mSolverCounterSat, 1310 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5184 SdHoareTripleChecker+Valid, 3993 SdHoareTripleChecker+Invalid, 8167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1310 IncrementalHoareTripleChecker+Valid, 6857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:38:48,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5184 Valid, 3993 Invalid, 8167 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1310 Valid, 6857 Invalid, 0 Unknown, 0 Unchecked, 9.0s Time] [2021-11-19 13:38:48,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9557 states. [2021-11-19 13:38:48,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9557 to 8995. [2021-11-19 13:38:48,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8995 states, 6726 states have (on average 1.6128456735057983) internal successors, (10848), 7058 states have internal predecessors, (10848), 1818 states have call successors, (1818), 400 states have call predecessors, (1818), 450 states have return successors, (2124), 1657 states have call predecessors, (2124), 1813 states have call successors, (2124) [2021-11-19 13:38:48,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8995 states to 8995 states and 14790 transitions. [2021-11-19 13:38:48,971 INFO L78 Accepts]: Start accepts. Automaton has 8995 states and 14790 transitions. Word has length 118 [2021-11-19 13:38:48,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:38:48,972 INFO L470 AbstractCegarLoop]: Abstraction has 8995 states and 14790 transitions. [2021-11-19 13:38:48,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 14.25) internal successors, (171), 12 states have internal predecessors, (171), 9 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (28), 9 states have call predecessors, (28), 8 states have call successors, (28) [2021-11-19 13:38:48,972 INFO L276 IsEmpty]: Start isEmpty. Operand 8995 states and 14790 transitions. [2021-11-19 13:38:48,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-19 13:38:48,979 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:38:48,979 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:38:49,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 13:38:49,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:38:49,193 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:38:49,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:38:49,194 INFO L85 PathProgramCache]: Analyzing trace with hash -597100899, now seen corresponding path program 1 times [2021-11-19 13:38:49,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:38:49,194 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1766638606] [2021-11-19 13:38:49,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:38:49,194 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:38:49,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:38:49,195 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:38:49,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 13:38:49,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:38:49,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 890 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 13:38:49,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:38:50,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:38:50,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:38:50,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:38:50,997 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:38:50,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1766638606] [2021-11-19 13:38:50,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1766638606] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:38:50,998 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:38:50,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 8] imperfect sequences [] total 14 [2021-11-19 13:38:50,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747359145] [2021-11-19 13:38:50,999 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:38:51,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 13:38:51,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:38:51,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 13:38:51,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-11-19 13:38:51,001 INFO L87 Difference]: Start difference. First operand 8995 states and 14790 transitions. Second operand has 14 states, 14 states have (on average 12.071428571428571) internal successors, (169), 12 states have internal predecessors, (169), 8 states have call successors, (29), 6 states have call predecessors, (29), 7 states have return successors, (28), 10 states have call predecessors, (28), 7 states have call successors, (28) [2021-11-19 13:39:03,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:39:03,558 INFO L93 Difference]: Finished difference Result 31178 states and 53093 transitions. [2021-11-19 13:39:03,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-19 13:39:03,561 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 12.071428571428571) internal successors, (169), 12 states have internal predecessors, (169), 8 states have call successors, (29), 6 states have call predecessors, (29), 7 states have return successors, (28), 10 states have call predecessors, (28), 7 states have call successors, (28) Word has length 122 [2021-11-19 13:39:03,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:39:03,776 INFO L225 Difference]: With dead ends: 31178 [2021-11-19 13:39:03,776 INFO L226 Difference]: Without dead ends: 22186 [2021-11-19 13:39:03,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2021-11-19 13:39:03,848 INFO L933 BasicCegarLoop]: 1806 mSDtfsCounter, 4966 mSDsluCounter, 2869 mSDsCounter, 0 mSdLazyCounter, 7191 mSolverCounterSat, 2339 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5062 SdHoareTripleChecker+Valid, 4675 SdHoareTripleChecker+Invalid, 9530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2339 IncrementalHoareTripleChecker+Valid, 7191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.6s IncrementalHoareTripleChecker+Time [2021-11-19 13:39:03,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5062 Valid, 4675 Invalid, 9530 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2339 Valid, 7191 Invalid, 0 Unknown, 0 Unchecked, 10.6s Time] [2021-11-19 13:39:03,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22186 states. [2021-11-19 13:39:06,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22186 to 17458. [2021-11-19 13:39:06,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17458 states, 12574 states have (on average 1.5903451566724989) internal successors, (19997), 13368 states have internal predecessors, (19997), 4031 states have call successors, (4031), 674 states have call predecessors, (4031), 852 states have return successors, (4925), 3833 states have call predecessors, (4925), 4026 states have call successors, (4925) [2021-11-19 13:39:06,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17458 states to 17458 states and 28953 transitions. [2021-11-19 13:39:06,199 INFO L78 Accepts]: Start accepts. Automaton has 17458 states and 28953 transitions. Word has length 122 [2021-11-19 13:39:06,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:39:06,200 INFO L470 AbstractCegarLoop]: Abstraction has 17458 states and 28953 transitions. [2021-11-19 13:39:06,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 12.071428571428571) internal successors, (169), 12 states have internal predecessors, (169), 8 states have call successors, (29), 6 states have call predecessors, (29), 7 states have return successors, (28), 10 states have call predecessors, (28), 7 states have call successors, (28) [2021-11-19 13:39:06,200 INFO L276 IsEmpty]: Start isEmpty. Operand 17458 states and 28953 transitions. [2021-11-19 13:39:06,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-19 13:39:06,211 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:39:06,211 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:39:06,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-19 13:39:06,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:39:06,416 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:39:06,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:39:06,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1205383953, now seen corresponding path program 1 times [2021-11-19 13:39:06,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:39:06,417 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [982617487] [2021-11-19 13:39:06,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:39:06,417 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:39:06,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:39:06,418 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:39:06,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 13:39:06,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:39:06,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 891 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 13:39:06,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:39:07,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:39:07,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:39:07,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:39:07,954 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:39:07,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [982617487] [2021-11-19 13:39:07,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [982617487] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:39:07,954 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:39:07,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-11-19 13:39:07,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90929882] [2021-11-19 13:39:07,955 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:39:07,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 13:39:07,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:39:07,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 13:39:07,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-19 13:39:07,957 INFO L87 Difference]: Start difference. First operand 17458 states and 28953 transitions. Second operand has 8 states, 8 states have (on average 20.25) internal successors, (162), 8 states have internal predecessors, (162), 8 states have call successors, (29), 6 states have call predecessors, (29), 5 states have return successors, (28), 8 states have call predecessors, (28), 7 states have call successors, (28) [2021-11-19 13:39:16,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:39:16,077 INFO L93 Difference]: Finished difference Result 59751 states and 102233 transitions. [2021-11-19 13:39:16,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 13:39:16,079 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 20.25) internal successors, (162), 8 states have internal predecessors, (162), 8 states have call successors, (29), 6 states have call predecessors, (29), 5 states have return successors, (28), 8 states have call predecessors, (28), 7 states have call successors, (28) Word has length 123 [2021-11-19 13:39:16,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:39:16,474 INFO L225 Difference]: With dead ends: 59751 [2021-11-19 13:39:16,474 INFO L226 Difference]: Without dead ends: 42341 [2021-11-19 13:39:16,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-19 13:39:16,603 INFO L933 BasicCegarLoop]: 1725 mSDtfsCounter, 4162 mSDsluCounter, 1122 mSDsCounter, 0 mSdLazyCounter, 2601 mSolverCounterSat, 1341 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4257 SdHoareTripleChecker+Valid, 2847 SdHoareTripleChecker+Invalid, 3942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1341 IncrementalHoareTripleChecker+Valid, 2601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-11-19 13:39:16,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4257 Valid, 2847 Invalid, 3942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1341 Valid, 2601 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2021-11-19 13:39:16,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42341 states. [2021-11-19 13:39:20,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42341 to 39124. [2021-11-19 13:39:20,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39124 states, 26897 states have (on average 1.5719968769751274) internal successors, (42282), 28951 states have internal predecessors, (42282), 10451 states have call successors, (10451), 1230 states have call predecessors, (10451), 1775 states have return successors, (13347), 10273 states have call predecessors, (13347), 10446 states have call successors, (13347) [2021-11-19 13:39:20,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39124 states to 39124 states and 66080 transitions. [2021-11-19 13:39:20,988 INFO L78 Accepts]: Start accepts. Automaton has 39124 states and 66080 transitions. Word has length 123 [2021-11-19 13:39:20,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:39:20,989 INFO L470 AbstractCegarLoop]: Abstraction has 39124 states and 66080 transitions. [2021-11-19 13:39:20,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.25) internal successors, (162), 8 states have internal predecessors, (162), 8 states have call successors, (29), 6 states have call predecessors, (29), 5 states have return successors, (28), 8 states have call predecessors, (28), 7 states have call successors, (28) [2021-11-19 13:39:20,989 INFO L276 IsEmpty]: Start isEmpty. Operand 39124 states and 66080 transitions. [2021-11-19 13:39:20,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-19 13:39:20,996 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:39:20,997 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:39:21,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-19 13:39:21,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:39:21,219 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:39:21,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:39:21,219 INFO L85 PathProgramCache]: Analyzing trace with hash -51874528, now seen corresponding path program 1 times [2021-11-19 13:39:21,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:39:21,220 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1039798159] [2021-11-19 13:39:21,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:39:21,221 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:39:21,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:39:21,222 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:39:21,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-19 13:39:21,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:39:21,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 892 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 13:39:21,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:39:22,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:39:22,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:39:22,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:39:22,827 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:39:22,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1039798159] [2021-11-19 13:39:22,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1039798159] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:39:22,827 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:39:22,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-11-19 13:39:22,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10038921] [2021-11-19 13:39:22,827 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:39:22,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 13:39:22,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:39:22,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 13:39:22,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-19 13:39:22,829 INFO L87 Difference]: Start difference. First operand 39124 states and 66080 transitions. Second operand has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 8 states have call successors, (29), 6 states have call predecessors, (29), 5 states have return successors, (28), 8 states have call predecessors, (28), 7 states have call successors, (28) [2021-11-19 13:39:37,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:39:37,359 INFO L93 Difference]: Finished difference Result 148207 states and 259334 transitions. [2021-11-19 13:39:37,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 13:39:37,361 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 8 states have call successors, (29), 6 states have call predecessors, (29), 5 states have return successors, (28), 8 states have call predecessors, (28), 7 states have call successors, (28) Word has length 124 [2021-11-19 13:39:37,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:39:38,520 INFO L225 Difference]: With dead ends: 148207 [2021-11-19 13:39:38,520 INFO L226 Difference]: Without dead ends: 109133 [2021-11-19 13:39:38,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-19 13:39:38,759 INFO L933 BasicCegarLoop]: 1733 mSDtfsCounter, 2920 mSDsluCounter, 1444 mSDsCounter, 0 mSdLazyCounter, 3336 mSolverCounterSat, 963 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3016 SdHoareTripleChecker+Valid, 3177 SdHoareTripleChecker+Invalid, 4299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 963 IncrementalHoareTripleChecker+Valid, 3336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-11-19 13:39:38,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3016 Valid, 3177 Invalid, 4299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [963 Valid, 3336 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2021-11-19 13:39:38,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109133 states. [2021-11-19 13:39:48,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109133 to 99754. [2021-11-19 13:39:48,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99754 states, 65222 states have (on average 1.556667995461654) internal successors, (101529), 70965 states have internal predecessors, (101529), 30402 states have call successors, (30402), 2342 states have call predecessors, (30402), 4129 states have return successors, (40952), 30736 states have call predecessors, (40952), 30397 states have call successors, (40952) [2021-11-19 13:39:50,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99754 states to 99754 states and 172883 transitions. [2021-11-19 13:39:50,209 INFO L78 Accepts]: Start accepts. Automaton has 99754 states and 172883 transitions. Word has length 124 [2021-11-19 13:39:50,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:39:50,210 INFO L470 AbstractCegarLoop]: Abstraction has 99754 states and 172883 transitions. [2021-11-19 13:39:50,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 8 states have call successors, (29), 6 states have call predecessors, (29), 5 states have return successors, (28), 8 states have call predecessors, (28), 7 states have call successors, (28) [2021-11-19 13:39:50,211 INFO L276 IsEmpty]: Start isEmpty. Operand 99754 states and 172883 transitions. [2021-11-19 13:39:50,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-19 13:39:50,216 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:39:50,217 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:39:50,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-19 13:39:50,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:39:50,429 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:39:50,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:39:50,430 INFO L85 PathProgramCache]: Analyzing trace with hash -410978570, now seen corresponding path program 1 times [2021-11-19 13:39:50,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:39:50,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1397840720] [2021-11-19 13:39:50,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:39:50,430 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:39:50,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:39:50,433 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:39:50,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbfbb4b-fb87-4b0d-9ebb-78cf15adb944/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 13:39:50,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:39:50,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 893 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 13:39:50,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:39:51,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:39:51,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:39:51,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:39:51,805 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:39:51,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1397840720] [2021-11-19 13:39:51,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1397840720] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:39:51,806 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:39:51,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-11-19 13:39:51,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124598353] [2021-11-19 13:39:51,807 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:39:51,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 13:39:51,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:39:51,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 13:39:51,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-19 13:39:51,808 INFO L87 Difference]: Start difference. First operand 99754 states and 172883 transitions. Second operand has 8 states, 8 states have (on average 20.5) internal successors, (164), 8 states have internal predecessors, (164), 8 states have call successors, (29), 6 states have call predecessors, (29), 5 states have return successors, (28), 8 states have call predecessors, (28), 7 states have call successors, (28)