./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product28.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_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/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_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product28.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/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_22e8a9ad-8cea-4ba0-9e34-23421909aab3/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 cb2818f0d8bce3a3c55c338823c603b0097898f29d2ecfaf46bb61225da928d8 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:28:53,389 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:28:53,391 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:28:53,450 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:28:53,450 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:28:53,452 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:28:53,453 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:28:53,456 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:28:53,458 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:28:53,459 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:28:53,460 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:28:53,462 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:28:53,462 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:28:53,464 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:28:53,465 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:28:53,469 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:28:53,471 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:28:53,472 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:28:53,474 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:28:53,477 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:28:53,485 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:28:53,491 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:28:53,493 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:28:53,494 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:28:53,498 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:28:53,498 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:28:53,499 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:28:53,500 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:28:53,501 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:28:53,502 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:28:53,502 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:28:53,508 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:28:53,510 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:28:53,512 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:28:53,514 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:28:53,514 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:28:53,515 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:28:53,515 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:28:53,515 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:28:53,517 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:28:53,517 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:28:53,518 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 14:28:53,574 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:28:53,574 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:28:53,575 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:28:53,575 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:28:53,575 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:28:53,576 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:28:53,576 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:28:53,576 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 14:28:53,576 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:28:53,577 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:28:53,577 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 14:28:53,577 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 14:28:53,577 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:28:53,577 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 14:28:53,578 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 14:28:53,578 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 14:28:53,579 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:28:53,579 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:28:53,579 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 14:28:53,579 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:28:53,580 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:28:53,580 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:28:53,580 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:28:53,580 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:28:53,580 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:28:53,581 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:28:53,581 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:28:53,581 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:28:53,581 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:28:53,582 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:28:53,582 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:28:53,582 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:28:53,582 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:28:53,582 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:28:53,583 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:28:53,583 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 14:28:53,583 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 14:28:53,583 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:28:53,584 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:28:53,584 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:28:53,584 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_22e8a9ad-8cea-4ba0-9e34-23421909aab3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb2818f0d8bce3a3c55c338823c603b0097898f29d2ecfaf46bb61225da928d8 [2021-11-19 14:28:53,920 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:28:53,949 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:28:53,953 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:28:53,954 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:28:53,959 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:28:53,961 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec3_product28.cil.c [2021-11-19 14:28:54,023 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/data/c0fc4eefc/4ea972f2b7e84d499ac52a2439746e35/FLAGac00d93c9 [2021-11-19 14:28:54,665 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:28:54,669 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/sv-benchmarks/c/product-lines/elevator_spec3_product28.cil.c [2021-11-19 14:28:54,710 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/data/c0fc4eefc/4ea972f2b7e84d499ac52a2439746e35/FLAGac00d93c9 [2021-11-19 14:28:54,861 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/data/c0fc4eefc/4ea972f2b7e84d499ac52a2439746e35 [2021-11-19 14:28:54,863 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:28:54,865 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:28:54,867 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:28:54,867 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:28:54,874 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:28:54,875 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:28:54" (1/1) ... [2021-11-19 14:28:54,876 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23816461 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:28:54, skipping insertion in model container [2021-11-19 14:28:54,876 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:28:54" (1/1) ... [2021-11-19 14:28:54,889 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:28:54,969 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:28:55,639 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_22e8a9ad-8cea-4ba0-9e34-23421909aab3/sv-benchmarks/c/product-lines/elevator_spec3_product28.cil.c[73221,73234] [2021-11-19 14:28:55,644 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:28:55,655 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-19 14:28:55,656 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3186edb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:28:55, skipping insertion in model container [2021-11-19 14:28:55,656 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:28:55,657 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 14:28:55,661 INFO L158 Benchmark]: Toolchain (without parser) took 793.04ms. Allocated memory was 86.0MB in the beginning and 119.5MB in the end (delta: 33.6MB). Free memory was 44.6MB in the beginning and 82.2MB in the end (delta: -37.7MB). Peak memory consumption was 11.4MB. Max. memory is 16.1GB. [2021-11-19 14:28:55,662 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 86.0MB. Free memory is still 64.1MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:28:55,665 INFO L158 Benchmark]: CACSL2BoogieTranslator took 790.10ms. Allocated memory was 86.0MB in the beginning and 119.5MB in the end (delta: 33.6MB). Free memory was 44.3MB in the beginning and 82.2MB in the end (delta: -37.9MB). Peak memory consumption was 11.4MB. Max. memory is 16.1GB. [2021-11-19 14:28:55,667 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 86.0MB. Free memory is still 64.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 790.10ms. Allocated memory was 86.0MB in the beginning and 119.5MB in the end (delta: 33.6MB). Free memory was 44.3MB in the beginning and 82.2MB in the end (delta: -37.9MB). Peak memory consumption was 11.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1876]: 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_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/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_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product28.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/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_22e8a9ad-8cea-4ba0-9e34-23421909aab3/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 cb2818f0d8bce3a3c55c338823c603b0097898f29d2ecfaf46bb61225da928d8 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:28:58,099 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:28:58,101 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:28:58,152 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:28:58,153 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:28:58,157 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:28:58,160 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:28:58,165 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:28:58,168 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:28:58,176 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:28:58,178 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:28:58,180 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:28:58,181 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:28:58,184 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:28:58,186 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:28:58,189 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:28:58,191 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:28:58,192 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:28:58,196 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:28:58,205 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:28:58,207 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:28:58,208 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:28:58,211 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:28:58,214 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:28:58,223 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:28:58,223 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:28:58,224 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:28:58,226 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:28:58,227 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:28:58,228 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:28:58,229 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:28:58,230 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:28:58,232 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:28:58,233 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:28:58,235 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:28:58,235 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:28:58,236 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:28:58,236 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:28:58,237 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:28:58,239 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:28:58,239 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:28:58,243 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 14:28:58,288 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:28:58,289 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:28:58,290 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:28:58,291 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:28:58,291 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:28:58,291 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:28:58,291 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:28:58,291 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:28:58,292 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:28:58,292 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:28:58,294 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:28:58,295 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:28:58,295 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:28:58,295 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:28:58,295 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:28:58,295 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:28:58,296 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:28:58,296 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:28:58,296 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 14:28:58,296 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 14:28:58,297 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:28:58,297 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:28:58,297 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:28:58,297 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:28:58,298 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:28:58,298 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 14:28:58,298 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:28:58,298 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:28:58,298 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:28:58,299 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:28:58,299 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:28:58,299 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 14:28:58,299 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 14:28:58,300 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:28:58,300 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:28:58,300 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:28:58,300 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_22e8a9ad-8cea-4ba0-9e34-23421909aab3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb2818f0d8bce3a3c55c338823c603b0097898f29d2ecfaf46bb61225da928d8 [2021-11-19 14:28:58,759 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:28:58,783 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:28:58,786 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:28:58,787 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:28:58,788 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:28:58,790 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec3_product28.cil.c [2021-11-19 14:28:58,875 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/data/37b4da979/e13bb8239d7b4567b6a73d75c71a8429/FLAG342a4e00e [2021-11-19 14:28:59,727 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:28:59,728 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/sv-benchmarks/c/product-lines/elevator_spec3_product28.cil.c [2021-11-19 14:28:59,761 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/data/37b4da979/e13bb8239d7b4567b6a73d75c71a8429/FLAG342a4e00e [2021-11-19 14:28:59,815 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/data/37b4da979/e13bb8239d7b4567b6a73d75c71a8429 [2021-11-19 14:28:59,819 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:28:59,821 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:28:59,826 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:28:59,826 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:28:59,830 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:28:59,831 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:28:59" (1/1) ... [2021-11-19 14:28:59,832 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7521f016 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:28:59, skipping insertion in model container [2021-11-19 14:28:59,834 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:28:59" (1/1) ... [2021-11-19 14:28:59,842 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:28:59,940 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:29:00,561 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_22e8a9ad-8cea-4ba0-9e34-23421909aab3/sv-benchmarks/c/product-lines/elevator_spec3_product28.cil.c[73221,73234] [2021-11-19 14:29:00,565 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:29:00,579 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 14:29:00,609 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:29:00,729 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_22e8a9ad-8cea-4ba0-9e34-23421909aab3/sv-benchmarks/c/product-lines/elevator_spec3_product28.cil.c[73221,73234] [2021-11-19 14:29:00,730 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:29:00,742 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:29:00,876 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_22e8a9ad-8cea-4ba0-9e34-23421909aab3/sv-benchmarks/c/product-lines/elevator_spec3_product28.cil.c[73221,73234] [2021-11-19 14:29:00,877 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:29:00,910 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:29:00,910 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:29:00 WrapperNode [2021-11-19 14:29:00,910 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:29:00,911 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:29:00,912 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:29:00,912 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:29:00,919 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:29:00" (1/1) ... [2021-11-19 14:29:00,985 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:29:00" (1/1) ... [2021-11-19 14:29:01,048 INFO L137 Inliner]: procedures = 97, calls = 354, calls flagged for inlining = 27, calls inlined = 23, statements flattened = 1088 [2021-11-19 14:29:01,049 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:29:01,049 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:29:01,050 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:29:01,050 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:29:01,059 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:29:00" (1/1) ... [2021-11-19 14:29:01,059 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:29:00" (1/1) ... [2021-11-19 14:29:01,073 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:29:00" (1/1) ... [2021-11-19 14:29:01,074 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:29:00" (1/1) ... [2021-11-19 14:29:01,116 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:29:00" (1/1) ... [2021-11-19 14:29:01,136 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:29:00" (1/1) ... [2021-11-19 14:29:01,141 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:29:00" (1/1) ... [2021-11-19 14:29:01,151 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:29:01,152 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:29:01,153 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:29:01,153 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:29:01,154 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:29:00" (1/1) ... [2021-11-19 14:29:01,161 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:29:01,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:29:01,194 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:29:01,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:29:01,318 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:29:01,319 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2021-11-19 14:29:01,319 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2021-11-19 14:29:01,320 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-19 14:29:01,320 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-19 14:29:01,320 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-19 14:29:01,320 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-19 14:29:01,320 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-19 14:29:01,320 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-19 14:29:01,321 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-19 14:29:01,321 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-19 14:29:01,321 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2021-11-19 14:29:01,321 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2021-11-19 14:29:01,321 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-19 14:29:01,321 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-19 14:29:01,322 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-19 14:29:01,322 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-19 14:29:01,322 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-19 14:29:01,322 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-19 14:29:01,322 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-19 14:29:01,322 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-19 14:29:01,323 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-19 14:29:01,323 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-19 14:29:01,323 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-19 14:29:01,323 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-19 14:29:01,323 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-19 14:29:01,323 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-19 14:29:01,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 14:29:01,324 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-19 14:29:01,324 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-19 14:29:01,324 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2021-11-19 14:29:01,325 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2021-11-19 14:29:01,325 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-19 14:29:01,325 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-19 14:29:01,325 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2021-11-19 14:29:01,325 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2021-11-19 14:29:01,325 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-19 14:29:01,326 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-19 14:29:01,326 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2021-11-19 14:29:01,326 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2021-11-19 14:29:01,326 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-19 14:29:01,326 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-19 14:29:01,326 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-19 14:29:01,327 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-19 14:29:01,327 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-19 14:29:01,327 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-19 14:29:01,328 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-19 14:29:01,328 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-19 14:29:01,329 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-19 14:29:01,330 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-19 14:29:01,331 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-19 14:29:01,332 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-19 14:29:01,332 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-19 14:29:01,332 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-19 14:29:01,332 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:29:01,333 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:29:01,333 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-19 14:29:01,333 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-19 14:29:01,333 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2021-11-19 14:29:01,334 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2021-11-19 14:29:01,571 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:29:01,573 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:29:02,793 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:29:02,815 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:29:02,815 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 14:29:02,819 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:29:02 BoogieIcfgContainer [2021-11-19 14:29:02,820 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:29:02,823 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:29:02,823 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:29:02,826 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:29:02,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:28:59" (1/3) ... [2021-11-19 14:29:02,828 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e4ff47d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:29:02, skipping insertion in model container [2021-11-19 14:29:02,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:29:00" (2/3) ... [2021-11-19 14:29:02,829 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e4ff47d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:29:02, skipping insertion in model container [2021-11-19 14:29:02,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:29:02" (3/3) ... [2021-11-19 14:29:02,831 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product28.cil.c [2021-11-19 14:29:02,838 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:29:02,838 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 14:29:02,917 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:29:02,929 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 14:29:02,929 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 14:29:02,992 INFO L276 IsEmpty]: Start isEmpty. Operand has 606 states, 466 states have (on average 1.667381974248927) internal successors, (777), 486 states have internal predecessors, (777), 110 states have call successors, (110), 28 states have call predecessors, (110), 28 states have return successors, (110), 106 states have call predecessors, (110), 110 states have call successors, (110) [2021-11-19 14:29:03,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-19 14:29:03,018 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:29:03,019 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] [2021-11-19 14:29:03,020 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:29:03,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:29:03,026 INFO L85 PathProgramCache]: Analyzing trace with hash 420443805, now seen corresponding path program 1 times [2021-11-19 14:29:03,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:29:03,044 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1076500310] [2021-11-19 14:29:03,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:29:03,045 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:29:03,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:29:03,051 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:29:03,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 14:29:03,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:29:03,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 764 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:29:03,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:29:03,898 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 14:29:03,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:29:04,322 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 14:29:04,323 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:29:04,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1076500310] [2021-11-19 14:29:04,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1076500310] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:29:04,324 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:29:04,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 14:29:04,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032724252] [2021-11-19 14:29:04,328 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:29:04,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:29:04,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:29:04,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:29:04,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:29:04,378 INFO L87 Difference]: Start difference. First operand has 606 states, 466 states have (on average 1.667381974248927) internal successors, (777), 486 states have internal predecessors, (777), 110 states have call successors, (110), 28 states have call predecessors, (110), 28 states have return successors, (110), 106 states have call predecessors, (110), 110 states have call successors, (110) Second operand has 11 states, 9 states have (on average 6.222222222222222) internal successors, (56), 9 states have internal predecessors, (56), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-19 14:29:04,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:29:04,839 INFO L93 Difference]: Finished difference Result 1215 states and 2015 transitions. [2021-11-19 14:29:04,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 14:29:04,842 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 6.222222222222222) internal successors, (56), 9 states have internal predecessors, (56), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 67 [2021-11-19 14:29:04,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:29:04,865 INFO L225 Difference]: With dead ends: 1215 [2021-11-19 14:29:04,865 INFO L226 Difference]: Without dead ends: 617 [2021-11-19 14:29:04,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 123 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 14:29:04,882 INFO L933 BasicCegarLoop]: 978 mSDtfsCounter, 118 mSDsluCounter, 7654 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 8632 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:29:04,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 8632 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:29:04,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2021-11-19 14:29:05,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 609. [2021-11-19 14:29:05,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 609 states, 469 states have (on average 1.6588486140724947) internal successors, (778), 489 states have internal predecessors, (778), 111 states have call successors, (111), 28 states have call predecessors, (111), 28 states have return successors, (110), 105 states have call predecessors, (110), 108 states have call successors, (110) [2021-11-19 14:29:05,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 609 states to 609 states and 999 transitions. [2021-11-19 14:29:05,039 INFO L78 Accepts]: Start accepts. Automaton has 609 states and 999 transitions. Word has length 67 [2021-11-19 14:29:05,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:29:05,040 INFO L470 AbstractCegarLoop]: Abstraction has 609 states and 999 transitions. [2021-11-19 14:29:05,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 6.222222222222222) internal successors, (56), 9 states have internal predecessors, (56), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-19 14:29:05,041 INFO L276 IsEmpty]: Start isEmpty. Operand 609 states and 999 transitions. [2021-11-19 14:29:05,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-19 14:29:05,051 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:29:05,051 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] [2021-11-19 14:29:05,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 14:29:05,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:29:05,272 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:29:05,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:29:05,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1069409467, now seen corresponding path program 1 times [2021-11-19 14:29:05,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:29:05,275 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [510739540] [2021-11-19 14:29:05,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:29:05,275 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:29:05,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:29:05,276 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:29:05,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 14:29:05,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:29:05,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 765 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:29:05,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:29:05,888 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 14:29:05,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:29:06,256 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 14:29:06,256 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:29:06,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [510739540] [2021-11-19 14:29:06,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [510739540] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:29:06,257 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:29:06,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 14:29:06,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579990055] [2021-11-19 14:29:06,261 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:29:06,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:29:06,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:29:06,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:29:06,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:29:06,264 INFO L87 Difference]: Start difference. First operand 609 states and 999 transitions. Second operand has 11 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-19 14:29:06,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:29:06,554 INFO L93 Difference]: Finished difference Result 1223 states and 2016 transitions. [2021-11-19 14:29:06,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 14:29:06,556 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 68 [2021-11-19 14:29:06,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:29:06,564 INFO L225 Difference]: With dead ends: 1223 [2021-11-19 14:29:06,564 INFO L226 Difference]: Without dead ends: 630 [2021-11-19 14:29:06,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 125 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 14:29:06,573 INFO L933 BasicCegarLoop]: 980 mSDtfsCounter, 105 mSDsluCounter, 5676 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 6656 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:29:06,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 6656 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:29:06,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2021-11-19 14:29:06,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 622. [2021-11-19 14:29:06,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622 states, 479 states have (on average 1.6555323590814197) internal successors, (793), 501 states have internal predecessors, (793), 112 states have call successors, (112), 28 states have call predecessors, (112), 30 states have return successors, (113), 106 states have call predecessors, (113), 109 states have call successors, (113) [2021-11-19 14:29:06,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 1018 transitions. [2021-11-19 14:29:06,622 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 1018 transitions. Word has length 68 [2021-11-19 14:29:06,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:29:06,623 INFO L470 AbstractCegarLoop]: Abstraction has 622 states and 1018 transitions. [2021-11-19 14:29:06,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-19 14:29:06,624 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 1018 transitions. [2021-11-19 14:29:06,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-19 14:29:06,630 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:29:06,630 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] [2021-11-19 14:29:06,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 14:29:06,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:29:06,857 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:29:06,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:29:06,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1251785087, now seen corresponding path program 1 times [2021-11-19 14:29:06,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:29:06,859 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [486690870] [2021-11-19 14:29:06,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:29:06,859 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:29:06,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:29:06,861 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:29:06,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 14:29:07,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:29:07,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 766 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:29:07,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:29:07,398 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 14:29:07,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:29:07,740 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 14:29:07,741 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:29:07,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [486690870] [2021-11-19 14:29:07,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [486690870] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:29:07,741 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:29:07,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 14:29:07,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84629983] [2021-11-19 14:29:07,742 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:29:07,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:29:07,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:29:07,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:29:07,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:29:07,744 INFO L87 Difference]: Start difference. First operand 622 states and 1018 transitions. Second operand has 11 states, 9 states have (on average 6.666666666666667) internal successors, (60), 9 states have internal predecessors, (60), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-19 14:29:08,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:29:08,022 INFO L93 Difference]: Finished difference Result 1249 states and 2055 transitions. [2021-11-19 14:29:08,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 14:29:08,024 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 6.666666666666667) internal successors, (60), 9 states have internal predecessors, (60), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 69 [2021-11-19 14:29:08,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:29:08,031 INFO L225 Difference]: With dead ends: 1249 [2021-11-19 14:29:08,031 INFO L226 Difference]: Without dead ends: 643 [2021-11-19 14:29:08,036 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 14:29:08,037 INFO L933 BasicCegarLoop]: 980 mSDtfsCounter, 104 mSDsluCounter, 6733 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 7713 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:29:08,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 7713 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:29:08,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2021-11-19 14:29:08,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 635. [2021-11-19 14:29:08,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 489 states have (on average 1.6523517382413089) internal successors, (808), 513 states have internal predecessors, (808), 113 states have call successors, (113), 28 states have call predecessors, (113), 32 states have return successors, (116), 107 states have call predecessors, (116), 110 states have call successors, (116) [2021-11-19 14:29:08,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 1037 transitions. [2021-11-19 14:29:08,081 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 1037 transitions. Word has length 69 [2021-11-19 14:29:08,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:29:08,082 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 1037 transitions. [2021-11-19 14:29:08,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 6.666666666666667) internal successors, (60), 9 states have internal predecessors, (60), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-19 14:29:08,082 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 1037 transitions. [2021-11-19 14:29:08,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-19 14:29:08,084 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:29:08,085 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] [2021-11-19 14:29:08,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 14:29:08,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:29:08,303 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:29:08,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:29:08,304 INFO L85 PathProgramCache]: Analyzing trace with hash -263776032, now seen corresponding path program 1 times [2021-11-19 14:29:08,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:29:08,304 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1702972223] [2021-11-19 14:29:08,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:29:08,305 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:29:08,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:29:08,306 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:29:08,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 14:29:08,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:29:08,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 766 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:29:08,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:29:08,802 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 14:29:08,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:29:09,102 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 14:29:09,102 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:29:09,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1702972223] [2021-11-19 14:29:09,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1702972223] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:29:09,103 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:29:09,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-19 14:29:09,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964522174] [2021-11-19 14:29:09,104 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:29:09,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:29:09,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:29:09,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:29:09,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:29:09,106 INFO L87 Difference]: Start difference. First operand 635 states and 1037 transitions. Second operand has 8 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-19 14:29:09,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:29:09,282 INFO L93 Difference]: Finished difference Result 1269 states and 2085 transitions. [2021-11-19 14:29:09,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:29:09,284 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 70 [2021-11-19 14:29:09,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:29:09,293 INFO L225 Difference]: With dead ends: 1269 [2021-11-19 14:29:09,293 INFO L226 Difference]: Without dead ends: 650 [2021-11-19 14:29:09,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:29:09,309 INFO L933 BasicCegarLoop]: 968 mSDtfsCounter, 242 mSDsluCounter, 3814 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 4782 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:29:09,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 4782 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:29:09,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2021-11-19 14:29:09,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 648. [2021-11-19 14:29:09,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 499 states have (on average 1.6492985971943888) internal successors, (823), 525 states have internal predecessors, (823), 114 states have call successors, (114), 28 states have call predecessors, (114), 34 states have return successors, (122), 108 states have call predecessors, (122), 111 states have call successors, (122) [2021-11-19 14:29:09,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 1059 transitions. [2021-11-19 14:29:09,391 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 1059 transitions. Word has length 70 [2021-11-19 14:29:09,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:29:09,392 INFO L470 AbstractCegarLoop]: Abstraction has 648 states and 1059 transitions. [2021-11-19 14:29:09,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-19 14:29:09,392 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 1059 transitions. [2021-11-19 14:29:09,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-19 14:29:09,395 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:29:09,395 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] [2021-11-19 14:29:09,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 14:29:09,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:29:09,612 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:29:09,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:29:09,613 INFO L85 PathProgramCache]: Analyzing trace with hash 763737701, now seen corresponding path program 1 times [2021-11-19 14:29:09,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:29:09,614 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1361530553] [2021-11-19 14:29:09,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:29:09,614 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:29:09,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:29:09,615 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:29:09,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 14:29:09,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:29:09,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 768 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:29:09,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:29:10,134 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 14:29:10,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:29:10,542 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 14:29:10,542 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:29:10,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1361530553] [2021-11-19 14:29:10,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1361530553] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:29:10,543 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:29:10,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 14:29:10,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058689650] [2021-11-19 14:29:10,544 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:29:10,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:29:10,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:29:10,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:29:10,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:29:10,546 INFO L87 Difference]: Start difference. First operand 648 states and 1059 transitions. Second operand has 13 states, 11 states have (on average 6.090909090909091) internal successors, (67), 11 states have internal predecessors, (67), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-19 14:29:10,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:29:10,945 INFO L93 Difference]: Finished difference Result 1292 states and 2121 transitions. [2021-11-19 14:29:10,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 14:29:10,946 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 6.090909090909091) internal successors, (67), 11 states have internal predecessors, (67), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 71 [2021-11-19 14:29:10,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:29:10,955 INFO L225 Difference]: With dead ends: 1292 [2021-11-19 14:29:10,955 INFO L226 Difference]: Without dead ends: 654 [2021-11-19 14:29:10,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:29:10,962 INFO L933 BasicCegarLoop]: 957 mSDtfsCounter, 124 mSDsluCounter, 8452 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 9409 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:29:10,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 9409 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 14:29:10,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2021-11-19 14:29:11,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 644. [2021-11-19 14:29:11,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 495 states have (on average 1.6404040404040403) internal successors, (812), 521 states have internal predecessors, (812), 114 states have call successors, (114), 28 states have call predecessors, (114), 34 states have return successors, (122), 108 states have call predecessors, (122), 111 states have call successors, (122) [2021-11-19 14:29:11,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 1048 transitions. [2021-11-19 14:29:11,016 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 1048 transitions. Word has length 71 [2021-11-19 14:29:11,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:29:11,017 INFO L470 AbstractCegarLoop]: Abstraction has 644 states and 1048 transitions. [2021-11-19 14:29:11,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 6.090909090909091) internal successors, (67), 11 states have internal predecessors, (67), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-19 14:29:11,018 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 1048 transitions. [2021-11-19 14:29:11,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-19 14:29:11,021 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:29:11,021 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] [2021-11-19 14:29:11,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 14:29:11,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:29:11,239 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:29:11,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:29:11,240 INFO L85 PathProgramCache]: Analyzing trace with hash -572691947, now seen corresponding path program 1 times [2021-11-19 14:29:11,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:29:11,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1151770833] [2021-11-19 14:29:11,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:29:11,241 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:29:11,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:29:11,243 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:29:11,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 14:29:11,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:29:11,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 768 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:29:11,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:29:11,707 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 14:29:11,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:29:11,904 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 14:29:11,904 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:29:11,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1151770833] [2021-11-19 14:29:11,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1151770833] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:29:11,904 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:29:11,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-19 14:29:11,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147214711] [2021-11-19 14:29:11,905 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:29:11,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:29:11,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:29:11,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:29:11,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:29:11,907 INFO L87 Difference]: Start difference. First operand 644 states and 1048 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-19 14:29:11,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:29:11,975 INFO L93 Difference]: Finished difference Result 1264 states and 2062 transitions. [2021-11-19 14:29:11,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:29:11,975 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 71 [2021-11-19 14:29:11,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:29:11,981 INFO L225 Difference]: With dead ends: 1264 [2021-11-19 14:29:11,981 INFO L226 Difference]: Without dead ends: 567 [2021-11-19 14:29:11,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:29:11,986 INFO L933 BasicCegarLoop]: 968 mSDtfsCounter, 32 mSDsluCounter, 965 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 1933 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:29:11,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 1933 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:29:11,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-11-19 14:29:12,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 567. [2021-11-19 14:29:12,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 430 states have (on average 1.6232558139534883) internal successors, (698), 448 states have internal predecessors, (698), 110 states have call successors, (110), 28 states have call predecessors, (110), 26 states have return successors, (107), 104 states have call predecessors, (107), 107 states have call successors, (107) [2021-11-19 14:29:12,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 915 transitions. [2021-11-19 14:29:12,015 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 915 transitions. Word has length 71 [2021-11-19 14:29:12,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:29:12,016 INFO L470 AbstractCegarLoop]: Abstraction has 567 states and 915 transitions. [2021-11-19 14:29:12,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-19 14:29:12,016 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 915 transitions. [2021-11-19 14:29:12,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-19 14:29:12,017 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:29:12,018 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] [2021-11-19 14:29:12,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 14:29:12,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:29:12,235 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:29:12,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:29:12,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1060730049, now seen corresponding path program 1 times [2021-11-19 14:29:12,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:29:12,236 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1080590810] [2021-11-19 14:29:12,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:29:12,236 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:29:12,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:29:12,238 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:29:12,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 14:29:12,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:29:12,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 769 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:29:12,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:29:12,733 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 14:29:12,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:29:13,117 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 14:29:13,117 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:29:13,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1080590810] [2021-11-19 14:29:13,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1080590810] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:29:13,118 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:29:13,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 14:29:13,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542938343] [2021-11-19 14:29:13,118 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:29:13,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:29:13,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:29:13,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:29:13,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:29:13,120 INFO L87 Difference]: Start difference. First operand 567 states and 915 transitions. Second operand has 13 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-19 14:29:13,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:29:13,334 INFO L93 Difference]: Finished difference Result 1121 states and 1818 transitions. [2021-11-19 14:29:13,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:29:13,335 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 72 [2021-11-19 14:29:13,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:29:13,341 INFO L225 Difference]: With dead ends: 1121 [2021-11-19 14:29:13,341 INFO L226 Difference]: Without dead ends: 567 [2021-11-19 14:29:13,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:29:13,346 INFO L933 BasicCegarLoop]: 898 mSDtfsCounter, 39 mSDsluCounter, 8930 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 9828 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:29:13,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 9828 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:29:13,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-11-19 14:29:13,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 567. [2021-11-19 14:29:13,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 430 states have (on average 1.6209302325581396) internal successors, (697), 448 states have internal predecessors, (697), 110 states have call successors, (110), 28 states have call predecessors, (110), 26 states have return successors, (107), 104 states have call predecessors, (107), 107 states have call successors, (107) [2021-11-19 14:29:13,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 914 transitions. [2021-11-19 14:29:13,378 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 914 transitions. Word has length 72 [2021-11-19 14:29:13,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:29:13,379 INFO L470 AbstractCegarLoop]: Abstraction has 567 states and 914 transitions. [2021-11-19 14:29:13,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-19 14:29:13,379 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 914 transitions. [2021-11-19 14:29:13,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-19 14:29:13,380 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:29:13,381 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] [2021-11-19 14:29:13,401 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 14:29:13,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:29:13,597 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:29:13,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:29:13,597 INFO L85 PathProgramCache]: Analyzing trace with hash -2103106070, now seen corresponding path program 1 times [2021-11-19 14:29:13,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:29:13,598 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2109196748] [2021-11-19 14:29:13,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:29:13,598 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:29:13,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:29:13,599 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:29:13,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 14:29:13,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:29:13,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 770 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:29:13,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:29:14,125 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 14:29:14,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:29:14,483 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 14:29:14,483 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:29:14,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2109196748] [2021-11-19 14:29:14,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2109196748] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:29:14,484 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:29:14,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 14:29:14,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194317761] [2021-11-19 14:29:14,484 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:29:14,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:29:14,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:29:14,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:29:14,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:29:14,486 INFO L87 Difference]: Start difference. First operand 567 states and 914 transitions. Second operand has 13 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-19 14:29:14,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:29:14,691 INFO L93 Difference]: Finished difference Result 1121 states and 1816 transitions. [2021-11-19 14:29:14,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:29:14,692 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 73 [2021-11-19 14:29:14,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:29:14,698 INFO L225 Difference]: With dead ends: 1121 [2021-11-19 14:29:14,699 INFO L226 Difference]: Without dead ends: 567 [2021-11-19 14:29:14,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:29:14,706 INFO L933 BasicCegarLoop]: 898 mSDtfsCounter, 35 mSDsluCounter, 8929 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 9827 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:29:14,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 9827 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:29:14,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-11-19 14:29:14,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 567. [2021-11-19 14:29:14,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 430 states have (on average 1.6186046511627907) internal successors, (696), 448 states have internal predecessors, (696), 110 states have call successors, (110), 28 states have call predecessors, (110), 26 states have return successors, (107), 104 states have call predecessors, (107), 107 states have call successors, (107) [2021-11-19 14:29:14,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 913 transitions. [2021-11-19 14:29:14,743 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 913 transitions. Word has length 73 [2021-11-19 14:29:14,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:29:14,743 INFO L470 AbstractCegarLoop]: Abstraction has 567 states and 913 transitions. [2021-11-19 14:29:14,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-19 14:29:14,744 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 913 transitions. [2021-11-19 14:29:14,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-19 14:29:14,745 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:29:14,745 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] [2021-11-19 14:29:14,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 14:29:14,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:29:14,959 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:29:14,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:29:14,960 INFO L85 PathProgramCache]: Analyzing trace with hash -375474972, now seen corresponding path program 1 times [2021-11-19 14:29:14,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:29:14,961 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [231214643] [2021-11-19 14:29:14,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:29:14,961 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:29:14,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:29:14,962 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:29:14,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 14:29:15,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:29:15,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 771 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:29:15,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:29:15,495 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 14:29:15,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:29:15,866 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 14:29:15,866 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:29:15,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [231214643] [2021-11-19 14:29:15,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [231214643] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:29:15,866 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:29:15,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 14:29:15,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873524080] [2021-11-19 14:29:15,867 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:29:15,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:29:15,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:29:15,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:29:15,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:29:15,868 INFO L87 Difference]: Start difference. First operand 567 states and 913 transitions. Second operand has 13 states, 11 states have (on average 6.636363636363637) internal successors, (73), 11 states have internal predecessors, (73), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-19 14:29:16,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:29:16,033 INFO L93 Difference]: Finished difference Result 1121 states and 1814 transitions. [2021-11-19 14:29:16,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:29:16,035 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 6.636363636363637) internal successors, (73), 11 states have internal predecessors, (73), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 74 [2021-11-19 14:29:16,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:29:16,041 INFO L225 Difference]: With dead ends: 1121 [2021-11-19 14:29:16,041 INFO L226 Difference]: Without dead ends: 567 [2021-11-19 14:29:16,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:29:16,046 INFO L933 BasicCegarLoop]: 898 mSDtfsCounter, 41 mSDsluCounter, 6245 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 7143 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:29:16,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 7143 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:29:16,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-11-19 14:29:16,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 567. [2021-11-19 14:29:16,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 430 states have (on average 1.6162790697674418) internal successors, (695), 448 states have internal predecessors, (695), 110 states have call successors, (110), 28 states have call predecessors, (110), 26 states have return successors, (107), 104 states have call predecessors, (107), 107 states have call successors, (107) [2021-11-19 14:29:16,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 912 transitions. [2021-11-19 14:29:16,070 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 912 transitions. Word has length 74 [2021-11-19 14:29:16,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:29:16,071 INFO L470 AbstractCegarLoop]: Abstraction has 567 states and 912 transitions. [2021-11-19 14:29:16,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 6.636363636363637) internal successors, (73), 11 states have internal predecessors, (73), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-19 14:29:16,071 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 912 transitions. [2021-11-19 14:29:16,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-19 14:29:16,072 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:29:16,072 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] [2021-11-19 14:29:16,093 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 14:29:16,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:29:16,289 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:29:16,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:29:16,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1323030895, now seen corresponding path program 1 times [2021-11-19 14:29:16,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:29:16,290 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [214608697] [2021-11-19 14:29:16,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:29:16,290 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:29:16,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:29:16,290 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:29:16,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 14:29:16,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:29:16,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 772 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:29:16,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:29:16,824 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:29:16,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:29:17,072 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 14:29:17,072 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:29:17,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [214608697] [2021-11-19 14:29:17,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [214608697] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:29:17,072 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:29:17,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-11-19 14:29:17,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535494740] [2021-11-19 14:29:17,073 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:29:17,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 14:29:17,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:29:17,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 14:29:17,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:29:17,074 INFO L87 Difference]: Start difference. First operand 567 states and 912 transitions. Second operand has 10 states, 10 states have (on average 9.0) internal successors, (90), 8 states have internal predecessors, (90), 6 states have call successors, (18), 4 states have call predecessors, (18), 6 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) [2021-11-19 14:29:19,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:29:19,806 INFO L93 Difference]: Finished difference Result 2227 states and 3654 transitions. [2021-11-19 14:29:19,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 14:29:19,807 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 9.0) internal successors, (90), 8 states have internal predecessors, (90), 6 states have call successors, (18), 4 states have call predecessors, (18), 6 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) Word has length 75 [2021-11-19 14:29:19,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:29:19,821 INFO L225 Difference]: With dead ends: 2227 [2021-11-19 14:29:19,821 INFO L226 Difference]: Without dead ends: 1678 [2021-11-19 14:29:19,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:29:19,828 INFO L933 BasicCegarLoop]: 1206 mSDtfsCounter, 1973 mSDsluCounter, 5389 mSDsCounter, 0 mSdLazyCounter, 1577 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1996 SdHoareTripleChecker+Valid, 6595 SdHoareTripleChecker+Invalid, 1748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 1577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:29:19,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1996 Valid, 6595 Invalid, 1748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 1577 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-11-19 14:29:19,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1678 states. [2021-11-19 14:29:19,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1678 to 1659. [2021-11-19 14:29:19,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1659 states, 1270 states have (on average 1.595275590551181) internal successors, (2026), 1324 states have internal predecessors, (2026), 312 states have call successors, (312), 78 states have call predecessors, (312), 76 states have return successors, (327), 298 states have call predecessors, (327), 307 states have call successors, (327) [2021-11-19 14:29:19,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1659 states to 1659 states and 2665 transitions. [2021-11-19 14:29:19,932 INFO L78 Accepts]: Start accepts. Automaton has 1659 states and 2665 transitions. Word has length 75 [2021-11-19 14:29:19,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:29:19,934 INFO L470 AbstractCegarLoop]: Abstraction has 1659 states and 2665 transitions. [2021-11-19 14:29:19,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.0) internal successors, (90), 8 states have internal predecessors, (90), 6 states have call successors, (18), 4 states have call predecessors, (18), 6 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) [2021-11-19 14:29:19,934 INFO L276 IsEmpty]: Start isEmpty. Operand 1659 states and 2665 transitions. [2021-11-19 14:29:19,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-19 14:29:19,936 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:29:19,936 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] [2021-11-19 14:29:19,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 14:29:20,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:29:20,151 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:29:20,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:29:20,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1579041169, now seen corresponding path program 1 times [2021-11-19 14:29:20,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:29:20,153 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1950477224] [2021-11-19 14:29:20,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:29:20,153 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:29:20,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:29:20,155 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:29:20,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 14:29:20,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:29:20,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 772 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:29:20,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:29:20,701 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:29:20,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:29:20,929 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 14:29:20,929 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:29:20,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1950477224] [2021-11-19 14:29:20,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1950477224] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:29:20,930 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:29:20,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-11-19 14:29:20,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366465007] [2021-11-19 14:29:20,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:29:20,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:29:20,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:29:20,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:29:20,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:29:20,933 INFO L87 Difference]: Start difference. First operand 1659 states and 2665 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 5 states have internal predecessors, (57), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-19 14:29:21,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:29:21,815 INFO L93 Difference]: Finished difference Result 4449 states and 7282 transitions. [2021-11-19 14:29:21,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:29:21,817 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 5 states have internal predecessors, (57), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 75 [2021-11-19 14:29:21,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:29:21,850 INFO L225 Difference]: With dead ends: 4449 [2021-11-19 14:29:21,850 INFO L226 Difference]: Without dead ends: 2808 [2021-11-19 14:29:21,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:29:21,865 INFO L933 BasicCegarLoop]: 1118 mSDtfsCounter, 878 mSDsluCounter, 3780 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 883 SdHoareTripleChecker+Valid, 4898 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:29:21,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [883 Valid, 4898 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 14:29:21,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2808 states. [2021-11-19 14:29:22,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2808 to 2790. [2021-11-19 14:29:22,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2790 states, 2142 states have (on average 1.6045751633986929) internal successors, (3437), 2230 states have internal predecessors, (3437), 515 states have call successors, (515), 127 states have call predecessors, (515), 132 states have return successors, (589), 503 states have call predecessors, (589), 508 states have call successors, (589) [2021-11-19 14:29:22,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2790 states to 2790 states and 4541 transitions. [2021-11-19 14:29:22,065 INFO L78 Accepts]: Start accepts. Automaton has 2790 states and 4541 transitions. Word has length 75 [2021-11-19 14:29:22,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:29:22,065 INFO L470 AbstractCegarLoop]: Abstraction has 2790 states and 4541 transitions. [2021-11-19 14:29:22,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 5 states have internal predecessors, (57), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-19 14:29:22,066 INFO L276 IsEmpty]: Start isEmpty. Operand 2790 states and 4541 transitions. [2021-11-19 14:29:22,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-19 14:29:22,068 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:29:22,068 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] [2021-11-19 14:29:22,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 14:29:22,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:29:22,285 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:29:22,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:29:22,285 INFO L85 PathProgramCache]: Analyzing trace with hash 63703912, now seen corresponding path program 1 times [2021-11-19 14:29:22,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:29:22,285 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1601755634] [2021-11-19 14:29:22,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:29:22,286 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:29:22,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:29:22,286 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:29:22,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 14:29:22,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:29:22,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 780 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:29:22,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:29:22,776 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:29:22,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:29:22,986 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 14:29:22,986 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:29:22,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1601755634] [2021-11-19 14:29:22,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1601755634] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:29:22,987 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:29:22,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-19 14:29:22,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558822608] [2021-11-19 14:29:22,987 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:29:22,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:29:22,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:29:22,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:29:22,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:29:22,989 INFO L87 Difference]: Start difference. First operand 2790 states and 4541 transitions. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 6 states have internal predecessors, (88), 3 states have call successors, (19), 3 states have call predecessors, (19), 5 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) [2021-11-19 14:29:24,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:29:24,589 INFO L93 Difference]: Finished difference Result 8671 states and 14841 transitions. [2021-11-19 14:29:24,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:29:24,593 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 6 states have internal predecessors, (88), 3 states have call successors, (19), 3 states have call predecessors, (19), 5 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) Word has length 78 [2021-11-19 14:29:24,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:29:24,655 INFO L225 Difference]: With dead ends: 8671 [2021-11-19 14:29:24,655 INFO L226 Difference]: Without dead ends: 5899 [2021-11-19 14:29:24,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:29:24,679 INFO L933 BasicCegarLoop]: 1165 mSDtfsCounter, 985 mSDsluCounter, 4744 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1008 SdHoareTripleChecker+Valid, 5909 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:29:24,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1008 Valid, 5909 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-19 14:29:24,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5899 states. [2021-11-19 14:29:25,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5899 to 5504. [2021-11-19 14:29:25,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5504 states, 4231 states have (on average 1.599858189553297) internal successors, (6769), 4410 states have internal predecessors, (6769), 1000 states have call successors, (1000), 251 states have call predecessors, (1000), 272 states have return successors, (1405), 984 states have call predecessors, (1405), 988 states have call successors, (1405) [2021-11-19 14:29:25,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5504 states to 5504 states and 9174 transitions. [2021-11-19 14:29:25,085 INFO L78 Accepts]: Start accepts. Automaton has 5504 states and 9174 transitions. Word has length 78 [2021-11-19 14:29:25,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:29:25,086 INFO L470 AbstractCegarLoop]: Abstraction has 5504 states and 9174 transitions. [2021-11-19 14:29:25,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 6 states have internal predecessors, (88), 3 states have call successors, (19), 3 states have call predecessors, (19), 5 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) [2021-11-19 14:29:25,087 INFO L276 IsEmpty]: Start isEmpty. Operand 5504 states and 9174 transitions. [2021-11-19 14:29:25,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-19 14:29:25,088 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:29:25,088 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] [2021-11-19 14:29:25,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-19 14:29:25,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:29:25,305 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:29:25,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:29:25,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1641824229, now seen corresponding path program 1 times [2021-11-19 14:29:25,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:29:25,306 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [25785368] [2021-11-19 14:29:25,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:29:25,306 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:29:25,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:29:25,307 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:29:25,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 14:29:25,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:29:25,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 781 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:29:25,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:29:25,747 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:29:25,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:29:25,917 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 14:29:25,918 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:29:25,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [25785368] [2021-11-19 14:29:25,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [25785368] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:29:25,918 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:29:25,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-19 14:29:25,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212336850] [2021-11-19 14:29:25,918 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:29:25,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:29:25,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:29:25,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:29:25,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:29:25,919 INFO L87 Difference]: Start difference. First operand 5504 states and 9174 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 14:29:26,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:29:26,264 INFO L93 Difference]: Finished difference Result 11020 states and 18593 transitions. [2021-11-19 14:29:26,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:29:26,265 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 79 [2021-11-19 14:29:26,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:29:26,330 INFO L225 Difference]: With dead ends: 11020 [2021-11-19 14:29:26,330 INFO L226 Difference]: Without dead ends: 5534 [2021-11-19 14:29:26,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:29:26,378 INFO L933 BasicCegarLoop]: 892 mSDtfsCounter, 19 mSDsluCounter, 2635 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 3527 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:29:26,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 3527 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:29:26,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5534 states. [2021-11-19 14:29:26,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5534 to 5524. [2021-11-19 14:29:26,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5524 states, 4246 states have (on average 1.5965614696184645) internal successors, (6779), 4425 states have internal predecessors, (6779), 1000 states have call successors, (1000), 261 states have call predecessors, (1000), 277 states have return successors, (1375), 979 states have call predecessors, (1375), 988 states have call successors, (1375) [2021-11-19 14:29:26,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5524 states to 5524 states and 9154 transitions. [2021-11-19 14:29:26,734 INFO L78 Accepts]: Start accepts. Automaton has 5524 states and 9154 transitions. Word has length 79 [2021-11-19 14:29:26,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:29:26,735 INFO L470 AbstractCegarLoop]: Abstraction has 5524 states and 9154 transitions. [2021-11-19 14:29:26,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 14:29:26,736 INFO L276 IsEmpty]: Start isEmpty. Operand 5524 states and 9154 transitions. [2021-11-19 14:29:26,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-19 14:29:26,737 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:29:26,738 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:29:26,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-19 14:29:26,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:29:26,960 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:29:26,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:29:26,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1062092657, now seen corresponding path program 1 times [2021-11-19 14:29:26,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:29:26,961 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1765431589] [2021-11-19 14:29:26,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:29:26,962 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:29:26,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:29:26,964 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:29:26,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-19 14:29:27,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:29:27,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 793 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:29:27,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:29:27,594 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 14:29:27,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:29:27,845 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:29:27,846 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:29:27,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1765431589] [2021-11-19 14:29:27,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1765431589] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:29:27,846 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:29:27,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-19 14:29:27,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521730673] [2021-11-19 14:29:27,847 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:29:27,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:29:27,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:29:27,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:29:27,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:29:27,848 INFO L87 Difference]: Start difference. First operand 5524 states and 9154 transitions. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 6 states have internal predecessors, (97), 3 states have call successors, (21), 3 states have call predecessors, (21), 5 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-19 14:29:29,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:29:29,643 INFO L93 Difference]: Finished difference Result 17362 states and 30857 transitions. [2021-11-19 14:29:29,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:29:29,645 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 6 states have internal predecessors, (97), 3 states have call successors, (21), 3 states have call predecessors, (21), 5 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) Word has length 87 [2021-11-19 14:29:29,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:29:29,810 INFO L225 Difference]: With dead ends: 17362 [2021-11-19 14:29:29,810 INFO L226 Difference]: Without dead ends: 11856 [2021-11-19 14:29:29,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:29:29,842 INFO L933 BasicCegarLoop]: 1149 mSDtfsCounter, 955 mSDsluCounter, 4722 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 973 SdHoareTripleChecker+Valid, 5871 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:29:29,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [973 Valid, 5871 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-19 14:29:29,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11856 states. [2021-11-19 14:29:30,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11856 to 11022. [2021-11-19 14:29:30,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11022 states, 8474 states have (on average 1.592046259145622) internal successors, (13491), 8840 states have internal predecessors, (13491), 1975 states have call successors, (1975), 519 states have call predecessors, (1975), 572 states have return successors, (3394), 1946 states have call predecessors, (3394), 1953 states have call successors, (3394) [2021-11-19 14:29:30,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11022 states to 11022 states and 18860 transitions. [2021-11-19 14:29:30,589 INFO L78 Accepts]: Start accepts. Automaton has 11022 states and 18860 transitions. Word has length 87 [2021-11-19 14:29:30,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:29:30,589 INFO L470 AbstractCegarLoop]: Abstraction has 11022 states and 18860 transitions. [2021-11-19 14:29:30,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 6 states have internal predecessors, (97), 3 states have call successors, (21), 3 states have call predecessors, (21), 5 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-19 14:29:30,590 INFO L276 IsEmpty]: Start isEmpty. Operand 11022 states and 18860 transitions. [2021-11-19 14:29:30,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-19 14:29:30,592 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:29:30,592 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:29:30,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-19 14:29:30,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:29:30,811 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:29:30,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:29:30,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1569245318, now seen corresponding path program 1 times [2021-11-19 14:29:30,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:29:30,812 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2114505081] [2021-11-19 14:29:30,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:29:30,812 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:29:30,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:29:30,813 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:29:30,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 14:29:31,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:29:31,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 794 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:29:31,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:29:31,265 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 14:29:31,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:29:31,446 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 14:29:31,447 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:29:31,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2114505081] [2021-11-19 14:29:31,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2114505081] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:29:31,447 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:29:31,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-19 14:29:31,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351825305] [2021-11-19 14:29:31,447 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:29:31,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:29:31,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:29:31,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:29:31,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:29:31,457 INFO L87 Difference]: Start difference. First operand 11022 states and 18860 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 14:29:31,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:29:31,963 INFO L93 Difference]: Finished difference Result 22146 states and 38484 transitions. [2021-11-19 14:29:31,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:29:31,963 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 88 [2021-11-19 14:29:31,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:29:32,143 INFO L225 Difference]: With dead ends: 22146 [2021-11-19 14:29:32,143 INFO L226 Difference]: Without dead ends: 11142 [2021-11-19 14:29:32,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:29:32,206 INFO L933 BasicCegarLoop]: 890 mSDtfsCounter, 21 mSDsluCounter, 2635 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 3525 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:29:32,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 3525 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:29:32,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11142 states. [2021-11-19 14:29:32,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11142 to 11122. [2021-11-19 14:29:32,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11122 states, 8564 states have (on average 1.5869920597851472) internal successors, (13591), 8910 states have internal predecessors, (13591), 1975 states have call successors, (1975), 559 states have call predecessors, (1975), 582 states have return successors, (3346), 1936 states have call predecessors, (3346), 1953 states have call successors, (3346) [2021-11-19 14:29:32,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11122 states to 11122 states and 18912 transitions. [2021-11-19 14:29:32,832 INFO L78 Accepts]: Start accepts. Automaton has 11122 states and 18912 transitions. Word has length 88 [2021-11-19 14:29:32,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:29:32,833 INFO L470 AbstractCegarLoop]: Abstraction has 11122 states and 18912 transitions. [2021-11-19 14:29:32,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 14:29:32,833 INFO L276 IsEmpty]: Start isEmpty. Operand 11122 states and 18912 transitions. [2021-11-19 14:29:32,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-19 14:29:32,834 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:29:32,834 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:29:32,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-19 14:29:33,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:29:33,035 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:29:33,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:29:33,036 INFO L85 PathProgramCache]: Analyzing trace with hash -778476359, now seen corresponding path program 1 times [2021-11-19 14:29:33,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:29:33,036 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1608797531] [2021-11-19 14:29:33,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:29:33,036 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:29:33,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:29:33,037 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:29:33,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-19 14:29:33,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:29:33,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 807 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:29:33,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:29:33,652 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 14:29:33,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:29:33,890 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 14:29:33,890 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:29:33,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1608797531] [2021-11-19 14:29:33,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1608797531] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:29:33,890 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:29:33,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-19 14:29:33,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963344391] [2021-11-19 14:29:33,891 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:29:33,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:29:33,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:29:33,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:29:33,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:29:33,892 INFO L87 Difference]: Start difference. First operand 11122 states and 18912 transitions. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 6 states have internal predecessors, (104), 3 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (21), 4 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-19 14:29:35,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:29:35,709 INFO L93 Difference]: Finished difference Result 34914 states and 65842 transitions. [2021-11-19 14:29:35,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:29:35,711 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 6 states have internal predecessors, (104), 3 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (21), 4 states have call predecessors, (21), 3 states have call successors, (21) Word has length 97 [2021-11-19 14:29:35,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:29:35,958 INFO L225 Difference]: With dead ends: 34914 [2021-11-19 14:29:35,958 INFO L226 Difference]: Without dead ends: 23810 [2021-11-19 14:29:36,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:29:36,087 INFO L933 BasicCegarLoop]: 1165 mSDtfsCounter, 932 mSDsluCounter, 4078 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 946 SdHoareTripleChecker+Valid, 5243 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:29:36,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [946 Valid, 5243 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 14:29:36,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23810 states. [2021-11-19 14:29:37,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23810 to 22298. [2021-11-19 14:29:37,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22298 states, 17165 states have (on average 1.5817069618409554) internal successors, (27150), 17875 states have internal predecessors, (27150), 3930 states have call successors, (3930), 1115 states have call predecessors, (3930), 1202 states have return successors, (8669), 3875 states have call predecessors, (8669), 3888 states have call successors, (8669) [2021-11-19 14:29:38,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22298 states to 22298 states and 39749 transitions. [2021-11-19 14:29:38,105 INFO L78 Accepts]: Start accepts. Automaton has 22298 states and 39749 transitions. Word has length 97 [2021-11-19 14:29:38,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:29:38,106 INFO L470 AbstractCegarLoop]: Abstraction has 22298 states and 39749 transitions. [2021-11-19 14:29:38,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 6 states have internal predecessors, (104), 3 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (21), 4 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-19 14:29:38,107 INFO L276 IsEmpty]: Start isEmpty. Operand 22298 states and 39749 transitions. [2021-11-19 14:29:38,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-19 14:29:38,108 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:29:38,108 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:29:38,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-19 14:29:38,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:29:38,323 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:29:38,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:29:38,324 INFO L85 PathProgramCache]: Analyzing trace with hash 689956218, now seen corresponding path program 1 times [2021-11-19 14:29:38,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:29:38,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1253633993] [2021-11-19 14:29:38,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:29:38,325 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:29:38,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:29:38,327 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:29:38,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-19 14:29:38,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:29:38,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 808 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:29:38,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:29:39,023 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:29:39,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:29:39,208 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 14:29:39,208 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:29:39,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1253633993] [2021-11-19 14:29:39,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1253633993] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:29:39,209 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:29:39,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-19 14:29:39,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310056438] [2021-11-19 14:29:39,210 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:29:39,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:29:39,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:29:39,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:29:39,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:29:39,212 INFO L87 Difference]: Start difference. First operand 22298 states and 39749 transitions. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-19 14:29:40,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:29:40,354 INFO L93 Difference]: Finished difference Result 44818 states and 81736 transitions. [2021-11-19 14:29:40,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:29:40,355 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 98 [2021-11-19 14:29:40,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:29:40,674 INFO L225 Difference]: With dead ends: 44818 [2021-11-19 14:29:40,675 INFO L226 Difference]: Without dead ends: 22538 [2021-11-19 14:29:40,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:29:40,858 INFO L933 BasicCegarLoop]: 890 mSDtfsCounter, 21 mSDsluCounter, 2635 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 3525 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:29:40,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 3525 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:29:40,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22538 states. [2021-11-19 14:29:41,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22538 to 22498. [2021-11-19 14:29:42,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22498 states, 17345 states have (on average 1.5768232920149898) internal successors, (27350), 18055 states have internal predecessors, (27350), 3930 states have call successors, (3930), 1155 states have call predecessors, (3930), 1222 states have return successors, (8597), 3855 states have call predecessors, (8597), 3888 states have call successors, (8597) [2021-11-19 14:29:42,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22498 states to 22498 states and 39877 transitions. [2021-11-19 14:29:42,462 INFO L78 Accepts]: Start accepts. Automaton has 22498 states and 39877 transitions. Word has length 98 [2021-11-19 14:29:42,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:29:42,463 INFO L470 AbstractCegarLoop]: Abstraction has 22498 states and 39877 transitions. [2021-11-19 14:29:42,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-19 14:29:42,463 INFO L276 IsEmpty]: Start isEmpty. Operand 22498 states and 39877 transitions. [2021-11-19 14:29:42,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-19 14:29:42,465 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:29:42,465 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:29:42,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-19 14:29:42,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:29:42,680 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:29:42,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:29:42,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1262017344, now seen corresponding path program 1 times [2021-11-19 14:29:42,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:29:42,681 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [308339658] [2021-11-19 14:29:42,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:29:42,682 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:29:42,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:29:42,683 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:29:42,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-19 14:29:42,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:29:43,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 822 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:29:43,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:29:43,271 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 14:29:43,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:29:43,544 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-19 14:29:43,545 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:29:43,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [308339658] [2021-11-19 14:29:43,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [308339658] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:29:43,545 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:29:43,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-19 14:29:43,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139169903] [2021-11-19 14:29:43,546 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:29:43,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:29:43,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:29:43,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:29:43,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:29:43,548 INFO L87 Difference]: Start difference. First operand 22498 states and 39877 transitions. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 6 states have internal predecessors, (111), 3 states have call successors, (25), 3 states have call predecessors, (25), 5 states have return successors, (23), 4 states have call predecessors, (23), 3 states have call successors, (23) [2021-11-19 14:29:47,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:29:47,415 INFO L93 Difference]: Finished difference Result 70410 states and 146280 transitions. [2021-11-19 14:29:47,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:29:47,416 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 6 states have internal predecessors, (111), 3 states have call successors, (25), 3 states have call predecessors, (25), 5 states have return successors, (23), 4 states have call predecessors, (23), 3 states have call successors, (23) Word has length 108 [2021-11-19 14:29:47,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:29:48,090 INFO L225 Difference]: With dead ends: 70410 [2021-11-19 14:29:48,090 INFO L226 Difference]: Without dead ends: 47930 [2021-11-19 14:29:48,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:29:48,505 INFO L933 BasicCegarLoop]: 1149 mSDtfsCounter, 928 mSDsluCounter, 4920 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 940 SdHoareTripleChecker+Valid, 6069 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:29:48,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [940 Valid, 6069 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-19 14:29:48,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47930 states. [2021-11-19 14:29:50,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47930 to 45190. [2021-11-19 14:29:50,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45190 states, 34822 states have (on average 1.5716788237321233) internal successors, (54729), 36280 states have internal predecessors, (54729), 7845 states have call successors, (7845), 2307 states have call predecessors, (7845), 2522 states have return successors, (23724), 7738 states have call predecessors, (23724), 7763 states have call successors, (23724) [2021-11-19 14:29:51,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45190 states to 45190 states and 86298 transitions. [2021-11-19 14:29:51,779 INFO L78 Accepts]: Start accepts. Automaton has 45190 states and 86298 transitions. Word has length 108 [2021-11-19 14:29:51,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:29:51,780 INFO L470 AbstractCegarLoop]: Abstraction has 45190 states and 86298 transitions. [2021-11-19 14:29:51,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 6 states have internal predecessors, (111), 3 states have call successors, (25), 3 states have call predecessors, (25), 5 states have return successors, (23), 4 states have call predecessors, (23), 3 states have call successors, (23) [2021-11-19 14:29:51,780 INFO L276 IsEmpty]: Start isEmpty. Operand 45190 states and 86298 transitions. [2021-11-19 14:29:51,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-19 14:29:51,781 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:29:51,782 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:29:51,800 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-11-19 14:29:51,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:29:51,999 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:29:51,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:29:52,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1986488763, now seen corresponding path program 1 times [2021-11-19 14:29:52,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:29:52,000 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [475059451] [2021-11-19 14:29:52,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:29:52,000 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:29:52,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:29:52,001 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:29:52,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-19 14:29:52,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:29:52,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 822 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:29:52,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:29:52,814 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-19 14:29:52,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:29:53,070 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-19 14:29:53,070 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:29:53,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [475059451] [2021-11-19 14:29:53,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [475059451] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:29:53,070 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:29:53,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 4 [2021-11-19 14:29:53,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742417150] [2021-11-19 14:29:53,071 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:29:53,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:29:53,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:29:53,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:29:53,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:29:53,073 INFO L87 Difference]: Start difference. First operand 45190 states and 86298 transitions. Second operand has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 4 states have call successors, (27), 4 states have call predecessors, (27), 3 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) [2021-11-19 14:29:58,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:29:58,773 INFO L93 Difference]: Finished difference Result 136586 states and 261904 transitions. [2021-11-19 14:29:58,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:29:58,775 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 4 states have call successors, (27), 4 states have call predecessors, (27), 3 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) Word has length 109 [2021-11-19 14:29:58,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:29:59,474 INFO L225 Difference]: With dead ends: 136586 [2021-11-19 14:29:59,475 INFO L226 Difference]: Without dead ends: 92543 [2021-11-19 14:30:00,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:30:00,097 INFO L933 BasicCegarLoop]: 1283 mSDtfsCounter, 2204 mSDsluCounter, 1547 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2204 SdHoareTripleChecker+Valid, 2830 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:30:00,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2204 Valid, 2830 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 14:30:00,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92543 states. [2021-11-19 14:30:04,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92543 to 87110. [2021-11-19 14:30:04,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87110 states, 67845 states have (on average 1.5695924533863954) internal successors, (106489), 69959 states have internal predecessors, (106489), 14527 states have call successors, (14527), 4460 states have call predecessors, (14527), 4737 states have return successors, (47058), 13894 states have call predecessors, (47058), 14360 states have call successors, (47058) [2021-11-19 14:30:06,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87110 states to 87110 states and 168074 transitions. [2021-11-19 14:30:06,130 INFO L78 Accepts]: Start accepts. Automaton has 87110 states and 168074 transitions. Word has length 109 [2021-11-19 14:30:06,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:30:06,131 INFO L470 AbstractCegarLoop]: Abstraction has 87110 states and 168074 transitions. [2021-11-19 14:30:06,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 4 states have call successors, (27), 4 states have call predecessors, (27), 3 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) [2021-11-19 14:30:06,132 INFO L276 IsEmpty]: Start isEmpty. Operand 87110 states and 168074 transitions. [2021-11-19 14:30:06,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-19 14:30:06,137 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:30:06,137 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:30:06,157 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-11-19 14:30:06,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:30:06,356 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:30:06,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:30:06,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1006902287, now seen corresponding path program 1 times [2021-11-19 14:30:06,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:30:06,357 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1679551478] [2021-11-19 14:30:06,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:30:06,358 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:30:06,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:30:06,358 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:30:06,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e8a9ad-8cea-4ba0-9e34-23421909aab3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-19 14:30:06,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:30:06,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 1016 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:30:06,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:30:07,054 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-19 14:30:07,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:30:07,488 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-19 14:30:07,488 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:30:07,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1679551478] [2021-11-19 14:30:07,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1679551478] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:30:07,489 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:30:07,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 14:30:07,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637713915] [2021-11-19 14:30:07,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:30:07,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:30:07,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:30:07,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:30:07,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:30:07,491 INFO L87 Difference]: Start difference. First operand 87110 states and 168074 transitions. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 4 states have internal predecessors, (107), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-19 14:30:15,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:30:15,803 INFO L93 Difference]: Finished difference Result 174862 states and 369424 transitions. [2021-11-19 14:30:15,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:30:15,814 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 4 states have internal predecessors, (107), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 164 [2021-11-19 14:30:15,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:30:16,531 INFO L225 Difference]: With dead ends: 174862 [2021-11-19 14:30:16,531 INFO L226 Difference]: Without dead ends: 87770 [2021-11-19 14:30:18,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 319 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:30:18,426 INFO L933 BasicCegarLoop]: 882 mSDtfsCounter, 811 mSDsluCounter, 1359 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 829 SdHoareTripleChecker+Valid, 2241 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:30:18,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [829 Valid, 2241 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 14:30:18,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87770 states.