./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product09.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_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/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_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product09.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/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_5814c8cb-a96b-431d-a61c-aa300f20c450/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 67b10dcf95f436cfd8f02a55d7d1d272656f1382a4eb6ab4ad3bba992e95e024 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:22:36,938 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:22:36,941 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:22:36,991 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:22:36,992 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:22:36,993 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:22:36,996 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:22:36,999 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:22:37,002 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:22:37,003 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:22:37,005 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:22:37,007 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:22:37,007 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:22:37,009 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:22:37,011 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:22:37,013 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:22:37,015 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:22:37,016 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:22:37,019 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:22:37,022 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:22:37,025 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:22:37,027 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:22:37,028 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:22:37,030 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:22:37,034 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:22:37,035 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:22:37,036 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:22:37,037 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:22:37,038 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:22:37,040 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:22:37,040 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:22:37,042 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:22:37,043 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:22:37,044 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:22:37,046 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:22:37,047 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:22:37,048 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:22:37,049 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:22:37,049 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:22:37,051 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:22:37,052 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:22:37,053 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 14:22:37,087 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:22:37,088 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:22:37,089 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:22:37,089 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:22:37,090 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:22:37,090 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:22:37,090 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:22:37,090 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 14:22:37,091 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:22:37,091 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:22:37,091 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 14:22:37,092 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 14:22:37,092 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:22:37,092 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 14:22:37,093 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 14:22:37,093 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 14:22:37,094 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:22:37,094 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:22:37,094 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 14:22:37,095 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:22:37,095 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:22:37,095 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:22:37,096 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:22:37,096 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:22:37,096 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:22:37,096 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:22:37,097 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:22:37,097 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:22:37,097 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:22:37,098 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:22:37,098 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:22:37,098 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:22:37,099 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:22:37,099 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:22:37,099 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:22:37,099 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 14:22:37,100 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 14:22:37,100 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:22:37,100 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:22:37,101 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:22:37,101 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_5814c8cb-a96b-431d-a61c-aa300f20c450/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 67b10dcf95f436cfd8f02a55d7d1d272656f1382a4eb6ab4ad3bba992e95e024 [2021-11-19 14:22:37,413 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:22:37,443 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:22:37,447 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:22:37,448 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:22:37,449 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:22:37,451 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec3_product09.cil.c [2021-11-19 14:22:37,593 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/data/ece56b722/38186e15b3de49d3bc814f519108f872/FLAG292636606 [2021-11-19 14:22:38,413 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:22:38,414 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/sv-benchmarks/c/product-lines/elevator_spec3_product09.cil.c [2021-11-19 14:22:38,440 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/data/ece56b722/38186e15b3de49d3bc814f519108f872/FLAG292636606 [2021-11-19 14:22:38,503 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/data/ece56b722/38186e15b3de49d3bc814f519108f872 [2021-11-19 14:22:38,506 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:22:38,510 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:22:38,514 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:22:38,516 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:22:38,521 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:22:38,522 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:22:38" (1/1) ... [2021-11-19 14:22:38,525 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79ecf1d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:22:38, skipping insertion in model container [2021-11-19 14:22:38,526 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:22:38" (1/1) ... [2021-11-19 14:22:38,536 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:22:38,638 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:22:39,033 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_5814c8cb-a96b-431d-a61c-aa300f20c450/sv-benchmarks/c/product-lines/elevator_spec3_product09.cil.c[21710,21723] [2021-11-19 14:22:39,462 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:22:39,476 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 14:22:39,477 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@157065d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:22:39, skipping insertion in model container [2021-11-19 14:22:39,478 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:22:39,478 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 14:22:39,481 INFO L158 Benchmark]: Toolchain (without parser) took 971.60ms. Allocated memory is still 125.8MB. Free memory was 88.5MB in the beginning and 85.8MB in the end (delta: 2.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-19 14:22:39,482 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 83.9MB. Free memory was 37.4MB in the beginning and 37.3MB in the end (delta: 78.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:22:39,483 INFO L158 Benchmark]: CACSL2BoogieTranslator took 964.42ms. Allocated memory is still 125.8MB. Free memory was 88.3MB in the beginning and 85.8MB in the end (delta: 2.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-19 14:22:39,485 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 83.9MB. Free memory was 37.4MB in the beginning and 37.3MB in the end (delta: 78.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 964.42ms. Allocated memory is still 125.8MB. Free memory was 88.3MB in the beginning and 85.8MB in the end (delta: 2.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 3005]: 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_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/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_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product09.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/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_5814c8cb-a96b-431d-a61c-aa300f20c450/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 67b10dcf95f436cfd8f02a55d7d1d272656f1382a4eb6ab4ad3bba992e95e024 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:22:42,382 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:22:42,386 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:22:42,448 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:22:42,449 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:22:42,455 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:22:42,457 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:22:42,463 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:22:42,468 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:22:42,480 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:22:42,482 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:22:42,485 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:22:42,485 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:22:42,489 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:22:42,491 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:22:42,497 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:22:42,499 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:22:42,501 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:22:42,503 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:22:42,513 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:22:42,516 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:22:42,518 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:22:42,521 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:22:42,524 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:22:42,536 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:22:42,536 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:22:42,537 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:22:42,540 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:22:42,541 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:22:42,542 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:22:42,543 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:22:42,544 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:22:42,547 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:22:42,548 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:22:42,550 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:22:42,550 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:22:42,552 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:22:42,552 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:22:42,553 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:22:42,555 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:22:42,556 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:22:42,557 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 14:22:42,609 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:22:42,609 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:22:42,611 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:22:42,612 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:22:42,612 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:22:42,613 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:22:42,613 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:22:42,613 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:22:42,614 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:22:42,614 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:22:42,617 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:22:42,617 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:22:42,618 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:22:42,618 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:22:42,618 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:22:42,619 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:22:42,619 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:22:42,619 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:22:42,620 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 14:22:42,620 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 14:22:42,620 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:22:42,621 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:22:42,621 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:22:42,622 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:22:42,622 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:22:42,622 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 14:22:42,623 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:22:42,623 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:22:42,623 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:22:42,624 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:22:42,624 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:22:42,624 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 14:22:42,625 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 14:22:42,625 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:22:42,626 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:22:42,626 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:22:42,627 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_5814c8cb-a96b-431d-a61c-aa300f20c450/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 67b10dcf95f436cfd8f02a55d7d1d272656f1382a4eb6ab4ad3bba992e95e024 [2021-11-19 14:22:43,176 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:22:43,220 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:22:43,225 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:22:43,227 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:22:43,230 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:22:43,233 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec3_product09.cil.c [2021-11-19 14:22:43,327 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/data/9b5c8d7af/bd3f3999bda54d01ad38e86ed48bc100/FLAGe3f5d8f6e [2021-11-19 14:22:44,158 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:22:44,159 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/sv-benchmarks/c/product-lines/elevator_spec3_product09.cil.c [2021-11-19 14:22:44,204 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/data/9b5c8d7af/bd3f3999bda54d01ad38e86ed48bc100/FLAGe3f5d8f6e [2021-11-19 14:22:44,288 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/data/9b5c8d7af/bd3f3999bda54d01ad38e86ed48bc100 [2021-11-19 14:22:44,291 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:22:44,294 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:22:44,298 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:22:44,299 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:22:44,303 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:22:44,304 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:22:44" (1/1) ... [2021-11-19 14:22:44,305 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44dcc993 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:22:44, skipping insertion in model container [2021-11-19 14:22:44,307 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:22:44" (1/1) ... [2021-11-19 14:22:44,315 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:22:44,429 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:22:44,988 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_5814c8cb-a96b-431d-a61c-aa300f20c450/sv-benchmarks/c/product-lines/elevator_spec3_product09.cil.c[21710,21723] [2021-11-19 14:22:45,388 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:22:45,410 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 14:22:45,441 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:22:45,475 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_5814c8cb-a96b-431d-a61c-aa300f20c450/sv-benchmarks/c/product-lines/elevator_spec3_product09.cil.c[21710,21723] [2021-11-19 14:22:45,594 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:22:45,612 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:22:45,655 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_5814c8cb-a96b-431d-a61c-aa300f20c450/sv-benchmarks/c/product-lines/elevator_spec3_product09.cil.c[21710,21723] [2021-11-19 14:22:45,791 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:22:45,848 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:22:45,849 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:22:45 WrapperNode [2021-11-19 14:22:45,849 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:22:45,851 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:22:45,851 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:22:45,851 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:22:45,861 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:22:45" (1/1) ... [2021-11-19 14:22:45,923 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:22:45" (1/1) ... [2021-11-19 14:22:45,994 INFO L137 Inliner]: procedures = 89, calls = 336, calls flagged for inlining = 23, calls inlined = 20, statements flattened = 759 [2021-11-19 14:22:45,995 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:22:45,996 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:22:45,996 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:22:45,996 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:22:46,008 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:22:45" (1/1) ... [2021-11-19 14:22:46,008 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:22:45" (1/1) ... [2021-11-19 14:22:46,040 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:22:45" (1/1) ... [2021-11-19 14:22:46,041 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:22:45" (1/1) ... [2021-11-19 14:22:46,071 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:22:45" (1/1) ... [2021-11-19 14:22:46,095 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:22:45" (1/1) ... [2021-11-19 14:22:46,101 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:22:45" (1/1) ... [2021-11-19 14:22:46,113 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:22:46,114 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:22:46,114 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:22:46,115 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:22:46,116 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:22:45" (1/1) ... [2021-11-19 14:22:46,124 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:22:46,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:22:46,167 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:22:46,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:22:46,247 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:22:46,248 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2021-11-19 14:22:46,248 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2021-11-19 14:22:46,248 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-19 14:22:46,248 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-19 14:22:46,248 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-19 14:22:46,248 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-19 14:22:46,248 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2021-11-19 14:22:46,249 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2021-11-19 14:22:46,249 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-19 14:22:46,249 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-19 14:22:46,249 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-19 14:22:46,249 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-19 14:22:46,250 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-19 14:22:46,250 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-19 14:22:46,250 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-19 14:22:46,250 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-19 14:22:46,251 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-19 14:22:46,251 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-19 14:22:46,251 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-19 14:22:46,251 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-19 14:22:46,251 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-19 14:22:46,252 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-19 14:22:46,252 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 14:22:46,252 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2021-11-19 14:22:46,252 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2021-11-19 14:22:46,253 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-19 14:22:46,253 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-19 14:22:46,253 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2021-11-19 14:22:46,253 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2021-11-19 14:22:46,253 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-19 14:22:46,254 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-19 14:22:46,254 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-19 14:22:46,254 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-19 14:22:46,254 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-19 14:22:46,254 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-19 14:22:46,255 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-19 14:22:46,255 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-19 14:22:46,255 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-19 14:22:46,255 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-19 14:22:46,256 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-19 14:22:46,256 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-19 14:22:46,256 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-19 14:22:46,256 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-19 14:22:46,256 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-19 14:22:46,257 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-19 14:22:46,257 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:22:46,257 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:22:46,258 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-19 14:22:46,258 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-19 14:22:46,448 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:22:46,451 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:22:48,119 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:22:48,145 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:22:48,146 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 14:22:48,151 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:22:48 BoogieIcfgContainer [2021-11-19 14:22:48,151 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:22:48,153 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:22:48,154 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:22:48,157 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:22:48,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:22:44" (1/3) ... [2021-11-19 14:22:48,159 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22aa3c44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:22:48, skipping insertion in model container [2021-11-19 14:22:48,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:22:45" (2/3) ... [2021-11-19 14:22:48,160 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22aa3c44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:22:48, skipping insertion in model container [2021-11-19 14:22:48,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:22:48" (3/3) ... [2021-11-19 14:22:48,161 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product09.cil.c [2021-11-19 14:22:48,168 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:22:48,168 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 14:22:48,253 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:22:48,264 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 14:22:48,265 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 14:22:48,327 INFO L276 IsEmpty]: Start isEmpty. Operand has 555 states, 432 states have (on average 1.6944444444444444) internal successors, (732), 450 states have internal predecessors, (732), 98 states have call successors, (98), 23 states have call predecessors, (98), 23 states have return successors, (98), 95 states have call predecessors, (98), 98 states have call successors, (98) [2021-11-19 14:22:48,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-19 14:22:48,418 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:22:48,419 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:22:48,419 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:22:48,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:22:48,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1881157288, now seen corresponding path program 1 times [2021-11-19 14:22:48,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:22:48,446 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1854381010] [2021-11-19 14:22:48,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:22:48,448 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:22:48,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:22:48,452 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:22:48,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 14:22:49,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:22:49,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 790 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:22:49,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:22:49,529 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 14:22:49,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:22:50,043 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 14:22:50,044 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:22:50,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1854381010] [2021-11-19 14:22:50,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1854381010] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:22:50,046 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:22:50,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 14:22:50,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741006153] [2021-11-19 14:22:50,051 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:22:50,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:22:50,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:22:50,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:22:50,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:22:50,110 INFO L87 Difference]: Start difference. First operand has 555 states, 432 states have (on average 1.6944444444444444) internal successors, (732), 450 states have internal predecessors, (732), 98 states have call successors, (98), 23 states have call predecessors, (98), 23 states have return successors, (98), 95 states have call predecessors, (98), 98 states have call successors, (98) Second operand has 11 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-19 14:22:50,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:22:50,666 INFO L93 Difference]: Finished difference Result 1113 states and 1877 transitions. [2021-11-19 14:22:50,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 14:22:50,671 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 85 [2021-11-19 14:22:50,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:22:50,710 INFO L225 Difference]: With dead ends: 1113 [2021-11-19 14:22:50,711 INFO L226 Difference]: Without dead ends: 566 [2021-11-19 14:22:50,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 159 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 14:22:50,749 INFO L933 BasicCegarLoop]: 910 mSDtfsCounter, 119 mSDsluCounter, 5358 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 6268 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:22:50,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 6268 Invalid, 111 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [5 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:22:50,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-11-19 14:22:50,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 558. [2021-11-19 14:22:50,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 435 states have (on average 1.6850574712643678) internal successors, (733), 453 states have internal predecessors, (733), 99 states have call successors, (99), 23 states have call predecessors, (99), 23 states have return successors, (98), 94 states have call predecessors, (98), 96 states have call successors, (98) [2021-11-19 14:22:50,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 930 transitions. [2021-11-19 14:22:50,892 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 930 transitions. Word has length 85 [2021-11-19 14:22:50,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:22:50,893 INFO L470 AbstractCegarLoop]: Abstraction has 558 states and 930 transitions. [2021-11-19 14:22:50,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-19 14:22:50,894 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 930 transitions. [2021-11-19 14:22:50,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-19 14:22:50,903 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:22:50,903 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:22:50,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 14:22:51,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:22:51,117 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:22:51,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:22:51,118 INFO L85 PathProgramCache]: Analyzing trace with hash 782189340, now seen corresponding path program 1 times [2021-11-19 14:22:51,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:22:51,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [569958051] [2021-11-19 14:22:51,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:22:51,121 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:22:51,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:22:51,123 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:22:51,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 14:22:51,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:22:51,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 791 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:22:51,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:22:51,859 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 14:22:51,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:22:52,347 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 14:22:52,348 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:22:52,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [569958051] [2021-11-19 14:22:52,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [569958051] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:22:52,349 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:22:52,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 14:22:52,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256319773] [2021-11-19 14:22:52,357 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:22:52,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:22:52,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:22:52,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:22:52,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:22:52,364 INFO L87 Difference]: Start difference. First operand 558 states and 930 transitions. Second operand has 11 states, 9 states have (on average 9.11111111111111) internal successors, (82), 9 states have internal predecessors, (82), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-19 14:22:52,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:22:52,665 INFO L93 Difference]: Finished difference Result 1121 states and 1878 transitions. [2021-11-19 14:22:52,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 14:22:52,667 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 9.11111111111111) internal successors, (82), 9 states have internal predecessors, (82), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 86 [2021-11-19 14:22:52,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:22:52,675 INFO L225 Difference]: With dead ends: 1121 [2021-11-19 14:22:52,675 INFO L226 Difference]: Without dead ends: 579 [2021-11-19 14:22:52,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 161 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 14:22:52,682 INFO L933 BasicCegarLoop]: 911 mSDtfsCounter, 176 mSDsluCounter, 4437 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 5348 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:22:52,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 5348 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:22:52,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-11-19 14:22:52,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 571. [2021-11-19 14:22:52,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 445 states have (on average 1.6808988764044943) internal successors, (748), 465 states have internal predecessors, (748), 100 states have call successors, (100), 23 states have call predecessors, (100), 25 states have return successors, (101), 95 states have call predecessors, (101), 97 states have call successors, (101) [2021-11-19 14:22:52,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 949 transitions. [2021-11-19 14:22:52,752 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 949 transitions. Word has length 86 [2021-11-19 14:22:52,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:22:52,753 INFO L470 AbstractCegarLoop]: Abstraction has 571 states and 949 transitions. [2021-11-19 14:22:52,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 9.11111111111111) internal successors, (82), 9 states have internal predecessors, (82), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-19 14:22:52,754 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 949 transitions. [2021-11-19 14:22:52,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-19 14:22:52,764 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:22:52,765 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:22:52,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 14:22:52,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:22:52,973 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:22:52,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:22:52,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1718384564, now seen corresponding path program 1 times [2021-11-19 14:22:52,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:22:52,976 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2142047601] [2021-11-19 14:22:52,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:22:52,977 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:22:52,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:22:52,978 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:22:52,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 14:22:53,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:22:53,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 792 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:22:53,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:22:53,666 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 14:22:53,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:22:54,128 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 14:22:54,129 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:22:54,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2142047601] [2021-11-19 14:22:54,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2142047601] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:22:54,130 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:22:54,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 14:22:54,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045048888] [2021-11-19 14:22:54,131 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:22:54,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:22:54,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:22:54,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:22:54,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:22:54,133 INFO L87 Difference]: Start difference. First operand 571 states and 949 transitions. Second operand has 11 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-19 14:22:54,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:22:54,419 INFO L93 Difference]: Finished difference Result 1147 states and 1917 transitions. [2021-11-19 14:22:54,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 14:22:54,421 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 87 [2021-11-19 14:22:54,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:22:54,429 INFO L225 Difference]: With dead ends: 1147 [2021-11-19 14:22:54,429 INFO L226 Difference]: Without dead ends: 592 [2021-11-19 14:22:54,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 163 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 14:22:54,437 INFO L933 BasicCegarLoop]: 910 mSDtfsCounter, 104 mSDsluCounter, 5341 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 6251 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:22:54,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 6251 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:22:54,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-11-19 14:22:54,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 584. [2021-11-19 14:22:54,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 455 states have (on average 1.676923076923077) internal successors, (763), 477 states have internal predecessors, (763), 101 states have call successors, (101), 23 states have call predecessors, (101), 27 states have return successors, (104), 96 states have call predecessors, (104), 98 states have call successors, (104) [2021-11-19 14:22:54,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 968 transitions. [2021-11-19 14:22:54,517 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 968 transitions. Word has length 87 [2021-11-19 14:22:54,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:22:54,518 INFO L470 AbstractCegarLoop]: Abstraction has 584 states and 968 transitions. [2021-11-19 14:22:54,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-19 14:22:54,519 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 968 transitions. [2021-11-19 14:22:54,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-19 14:22:54,525 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:22:54,525 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:22:54,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 14:22:54,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:22:54,755 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:22:54,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:22:54,756 INFO L85 PathProgramCache]: Analyzing trace with hash -65751743, now seen corresponding path program 1 times [2021-11-19 14:22:54,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:22:54,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [263652828] [2021-11-19 14:22:54,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:22:54,758 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:22:54,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:22:54,759 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:22:54,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 14:22:55,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:22:55,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 792 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:22:55,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:22:55,457 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 14:22:55,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:22:55,952 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 14:22:55,952 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:22:55,952 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [263652828] [2021-11-19 14:22:55,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [263652828] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:22:55,953 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:22:55,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-19 14:22:55,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726578404] [2021-11-19 14:22:55,954 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:22:55,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:22:55,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:22:55,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:22:55,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:22:55,960 INFO L87 Difference]: Start difference. First operand 584 states and 968 transitions. Second operand has 8 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-19 14:22:56,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:22:56,202 INFO L93 Difference]: Finished difference Result 1167 states and 1947 transitions. [2021-11-19 14:22:56,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:22:56,203 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 88 [2021-11-19 14:22:56,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:22:56,211 INFO L225 Difference]: With dead ends: 1167 [2021-11-19 14:22:56,212 INFO L226 Difference]: Without dead ends: 599 [2021-11-19 14:22:56,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:22:56,230 INFO L933 BasicCegarLoop]: 899 mSDtfsCounter, 150 mSDsluCounter, 5188 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 6087 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:22:56,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 6087 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:22:56,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2021-11-19 14:22:56,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 597. [2021-11-19 14:22:56,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 465 states have (on average 1.6731182795698925) internal successors, (778), 489 states have internal predecessors, (778), 102 states have call successors, (102), 23 states have call predecessors, (102), 29 states have return successors, (110), 97 states have call predecessors, (110), 99 states have call successors, (110) [2021-11-19 14:22:56,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 990 transitions. [2021-11-19 14:22:56,292 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 990 transitions. Word has length 88 [2021-11-19 14:22:56,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:22:56,293 INFO L470 AbstractCegarLoop]: Abstraction has 597 states and 990 transitions. [2021-11-19 14:22:56,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-19 14:22:56,293 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 990 transitions. [2021-11-19 14:22:56,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-19 14:22:56,305 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:22:56,306 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:22:56,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 14:22:56,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:22:56,521 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:22:56,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:22:56,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1748381200, now seen corresponding path program 1 times [2021-11-19 14:22:56,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:22:56,522 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1437267080] [2021-11-19 14:22:56,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:22:56,522 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:22:56,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:22:56,523 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:22:56,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 14:22:56,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:22:56,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 794 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:22:56,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:22:57,228 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 14:22:57,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:22:57,771 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 14:22:57,772 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:22:57,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1437267080] [2021-11-19 14:22:57,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1437267080] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:22:57,773 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:22:57,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 14:22:57,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892304631] [2021-11-19 14:22:57,774 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:22:57,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:22:57,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:22:57,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:22:57,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:22:57,776 INFO L87 Difference]: Start difference. First operand 597 states and 990 transitions. Second operand has 13 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-19 14:22:58,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:22:58,156 INFO L93 Difference]: Finished difference Result 1190 states and 1983 transitions. [2021-11-19 14:22:58,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 14:22:58,158 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 89 [2021-11-19 14:22:58,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:22:58,165 INFO L225 Difference]: With dead ends: 1190 [2021-11-19 14:22:58,165 INFO L226 Difference]: Without dead ends: 603 [2021-11-19 14:22:58,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 165 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 14:22:58,172 INFO L933 BasicCegarLoop]: 890 mSDtfsCounter, 124 mSDsluCounter, 6078 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 6968 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:22:58,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 6968 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 14:22:58,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2021-11-19 14:22:58,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 593. [2021-11-19 14:22:58,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 461 states have (on average 1.6637744034707158) internal successors, (767), 485 states have internal predecessors, (767), 102 states have call successors, (102), 23 states have call predecessors, (102), 29 states have return successors, (110), 97 states have call predecessors, (110), 99 states have call successors, (110) [2021-11-19 14:22:58,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 979 transitions. [2021-11-19 14:22:58,219 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 979 transitions. Word has length 89 [2021-11-19 14:22:58,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:22:58,228 INFO L470 AbstractCegarLoop]: Abstraction has 593 states and 979 transitions. [2021-11-19 14:22:58,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-19 14:22:58,229 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 979 transitions. [2021-11-19 14:22:58,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-19 14:22:58,238 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:22:58,238 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:22:58,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 14:22:58,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:22:58,457 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:22:58,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:22:58,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1984002400, now seen corresponding path program 1 times [2021-11-19 14:22:58,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:22:58,458 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1262504692] [2021-11-19 14:22:58,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:22:58,459 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:22:58,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:22:58,460 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:22:58,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 14:22:58,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:22:58,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 794 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:22:58,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:22:59,134 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 14:22:59,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:22:59,425 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 14:22:59,425 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:22:59,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1262504692] [2021-11-19 14:22:59,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1262504692] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:22:59,426 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:22:59,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-19 14:22:59,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191118540] [2021-11-19 14:22:59,426 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:22:59,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:22:59,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:22:59,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:22:59,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:22:59,428 INFO L87 Difference]: Start difference. First operand 593 states and 979 transitions. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-19 14:22:59,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:22:59,512 INFO L93 Difference]: Finished difference Result 1162 states and 1924 transitions. [2021-11-19 14:22:59,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:22:59,513 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 89 [2021-11-19 14:22:59,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:22:59,519 INFO L225 Difference]: With dead ends: 1162 [2021-11-19 14:22:59,519 INFO L226 Difference]: Without dead ends: 516 [2021-11-19 14:22:59,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 173 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 14:22:59,527 INFO L933 BasicCegarLoop]: 899 mSDtfsCounter, 19 mSDsluCounter, 2686 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 3585 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:22:59,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 3585 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:22:59,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-11-19 14:22:59,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 516. [2021-11-19 14:22:59,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 396 states have (on average 1.648989898989899) internal successors, (653), 412 states have internal predecessors, (653), 98 states have call successors, (98), 23 states have call predecessors, (98), 21 states have return successors, (95), 93 states have call predecessors, (95), 95 states have call successors, (95) [2021-11-19 14:22:59,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 846 transitions. [2021-11-19 14:22:59,563 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 846 transitions. Word has length 89 [2021-11-19 14:22:59,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:22:59,564 INFO L470 AbstractCegarLoop]: Abstraction has 516 states and 846 transitions. [2021-11-19 14:22:59,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-19 14:22:59,564 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 846 transitions. [2021-11-19 14:22:59,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-19 14:22:59,568 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:22:59,569 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:22:59,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 14:22:59,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:22:59,785 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:22:59,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:22:59,785 INFO L85 PathProgramCache]: Analyzing trace with hash -864765152, now seen corresponding path program 1 times [2021-11-19 14:22:59,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:22:59,786 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [850916709] [2021-11-19 14:22:59,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:22:59,787 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:22:59,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:22:59,789 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:22:59,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 14:23:00,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:23:00,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 795 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:23:00,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:23:00,567 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 14:23:00,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:23:01,170 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 14:23:01,171 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:23:01,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [850916709] [2021-11-19 14:23:01,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [850916709] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:23:01,172 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:23:01,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 14:23:01,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745996517] [2021-11-19 14:23:01,173 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:23:01,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:23:01,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:23:01,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:23:01,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:23:01,176 INFO L87 Difference]: Start difference. First operand 516 states and 846 transitions. Second operand has 13 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-19 14:23:01,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:23:01,439 INFO L93 Difference]: Finished difference Result 1019 states and 1680 transitions. [2021-11-19 14:23:01,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:23:01,442 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 90 [2021-11-19 14:23:01,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:23:01,455 INFO L225 Difference]: With dead ends: 1019 [2021-11-19 14:23:01,456 INFO L226 Difference]: Without dead ends: 516 [2021-11-19 14:23:01,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:23:01,465 INFO L933 BasicCegarLoop]: 829 mSDtfsCounter, 63 mSDsluCounter, 7426 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 8255 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:23:01,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 8255 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:23:01,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-11-19 14:23:01,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 516. [2021-11-19 14:23:01,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 396 states have (on average 1.6464646464646464) internal successors, (652), 412 states have internal predecessors, (652), 98 states have call successors, (98), 23 states have call predecessors, (98), 21 states have return successors, (95), 93 states have call predecessors, (95), 95 states have call successors, (95) [2021-11-19 14:23:01,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 845 transitions. [2021-11-19 14:23:01,499 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 845 transitions. Word has length 90 [2021-11-19 14:23:01,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:23:01,500 INFO L470 AbstractCegarLoop]: Abstraction has 516 states and 845 transitions. [2021-11-19 14:23:01,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-19 14:23:01,505 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 845 transitions. [2021-11-19 14:23:01,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-19 14:23:01,509 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:23:01,509 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:23:01,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 14:23:01,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:23:01,722 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:23:01,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:23:01,723 INFO L85 PathProgramCache]: Analyzing trace with hash -385145611, now seen corresponding path program 1 times [2021-11-19 14:23:01,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:23:01,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1337293403] [2021-11-19 14:23:01,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:23:01,724 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:23:01,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:23:01,725 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:23:01,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 14:23:02,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:23:02,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 796 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:23:02,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:23:02,417 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 14:23:02,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:23:02,992 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 14:23:02,992 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:23:02,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1337293403] [2021-11-19 14:23:02,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1337293403] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:23:02,993 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:23:02,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 14:23:02,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435115297] [2021-11-19 14:23:02,993 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:23:02,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:23:02,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:23:02,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:23:02,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:23:02,996 INFO L87 Difference]: Start difference. First operand 516 states and 845 transitions. Second operand has 13 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-19 14:23:03,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:23:03,247 INFO L93 Difference]: Finished difference Result 1019 states and 1678 transitions. [2021-11-19 14:23:03,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:23:03,249 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 91 [2021-11-19 14:23:03,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:23:03,255 INFO L225 Difference]: With dead ends: 1019 [2021-11-19 14:23:03,255 INFO L226 Difference]: Without dead ends: 516 [2021-11-19 14:23:03,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 169 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 14:23:03,262 INFO L933 BasicCegarLoop]: 829 mSDtfsCounter, 69 mSDsluCounter, 6602 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 7431 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:23:03,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 7431 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:23:03,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-11-19 14:23:03,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 516. [2021-11-19 14:23:03,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 396 states have (on average 1.643939393939394) internal successors, (651), 412 states have internal predecessors, (651), 98 states have call successors, (98), 23 states have call predecessors, (98), 21 states have return successors, (95), 93 states have call predecessors, (95), 95 states have call successors, (95) [2021-11-19 14:23:03,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 844 transitions. [2021-11-19 14:23:03,294 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 844 transitions. Word has length 91 [2021-11-19 14:23:03,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:23:03,295 INFO L470 AbstractCegarLoop]: Abstraction has 516 states and 844 transitions. [2021-11-19 14:23:03,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-19 14:23:03,295 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 844 transitions. [2021-11-19 14:23:03,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-19 14:23:03,299 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:23:03,299 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:23:03,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 14:23:03,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:23:03,534 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:23:03,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:23:03,535 INFO L85 PathProgramCache]: Analyzing trace with hash 455484101, now seen corresponding path program 1 times [2021-11-19 14:23:03,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:23:03,535 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [89044970] [2021-11-19 14:23:03,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:23:03,536 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:23:03,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:23:03,538 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:23:03,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 14:23:03,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:23:03,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:23:03,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:23:04,192 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 14:23:04,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:23:04,759 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 14:23:04,759 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:23:04,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [89044970] [2021-11-19 14:23:04,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [89044970] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:23:04,760 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:23:04,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 14:23:04,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103037565] [2021-11-19 14:23:04,761 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:23:04,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:23:04,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:23:04,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:23:04,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:23:04,764 INFO L87 Difference]: Start difference. First operand 516 states and 844 transitions. Second operand has 13 states, 11 states have (on average 8.818181818181818) internal successors, (97), 11 states have internal predecessors, (97), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-19 14:23:05,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:23:05,007 INFO L93 Difference]: Finished difference Result 1019 states and 1676 transitions. [2021-11-19 14:23:05,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:23:05,009 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 8.818181818181818) internal successors, (97), 11 states have internal predecessors, (97), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 92 [2021-11-19 14:23:05,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:23:05,015 INFO L225 Difference]: With dead ends: 1019 [2021-11-19 14:23:05,016 INFO L226 Difference]: Without dead ends: 516 [2021-11-19 14:23:05,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:23:05,022 INFO L933 BasicCegarLoop]: 829 mSDtfsCounter, 33 mSDsluCounter, 7412 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 8241 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:23:05,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 8241 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:23:05,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-11-19 14:23:05,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 516. [2021-11-19 14:23:05,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 396 states have (on average 1.6414141414141414) internal successors, (650), 412 states have internal predecessors, (650), 98 states have call successors, (98), 23 states have call predecessors, (98), 21 states have return successors, (95), 93 states have call predecessors, (95), 95 states have call successors, (95) [2021-11-19 14:23:05,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 843 transitions. [2021-11-19 14:23:05,053 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 843 transitions. Word has length 92 [2021-11-19 14:23:05,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:23:05,054 INFO L470 AbstractCegarLoop]: Abstraction has 516 states and 843 transitions. [2021-11-19 14:23:05,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 8.818181818181818) internal successors, (97), 11 states have internal predecessors, (97), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-19 14:23:05,054 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 843 transitions. [2021-11-19 14:23:05,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-19 14:23:05,058 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:23:05,058 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:23:05,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 14:23:05,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:23:05,281 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:23:05,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:23:05,282 INFO L85 PathProgramCache]: Analyzing trace with hash -397472774, now seen corresponding path program 1 times [2021-11-19 14:23:05,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:23:05,283 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [869443558] [2021-11-19 14:23:05,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:23:05,283 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:23:05,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:23:05,285 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:23:05,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 14:23:05,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:23:05,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 798 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:23:05,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:23:05,940 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 14:23:05,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:23:06,216 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 14:23:06,217 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:23:06,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [869443558] [2021-11-19 14:23:06,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [869443558] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:23:06,217 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:23:06,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-19 14:23:06,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132527947] [2021-11-19 14:23:06,219 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:23:06,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:23:06,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:23:06,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:23:06,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:23:06,222 INFO L87 Difference]: Start difference. First operand 516 states and 843 transitions. Second operand has 8 states, 8 states have (on average 14.25) internal successors, (114), 8 states have internal predecessors, (114), 6 states have call successors, (22), 4 states have call predecessors, (22), 4 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2021-11-19 14:23:09,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:23:09,072 INFO L93 Difference]: Finished difference Result 2097 states and 3493 transitions. [2021-11-19 14:23:09,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 14:23:09,074 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 14.25) internal successors, (114), 8 states have internal predecessors, (114), 6 states have call successors, (22), 4 states have call predecessors, (22), 4 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 93 [2021-11-19 14:23:09,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:23:09,092 INFO L225 Difference]: With dead ends: 2097 [2021-11-19 14:23:09,092 INFO L226 Difference]: Without dead ends: 1599 [2021-11-19 14:23:09,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:23:09,103 INFO L933 BasicCegarLoop]: 1027 mSDtfsCounter, 2153 mSDsluCounter, 4880 mSDsCounter, 0 mSdLazyCounter, 951 mSolverCounterSat, 538 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2215 SdHoareTripleChecker+Valid, 5907 SdHoareTripleChecker+Invalid, 1489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 538 IncrementalHoareTripleChecker+Valid, 951 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:23:09,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2215 Valid, 5907 Invalid, 1489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [538 Valid, 951 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-11-19 14:23:09,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1599 states. [2021-11-19 14:23:09,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1599 to 1432. [2021-11-19 14:23:09,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1432 states, 1101 states have (on average 1.6058128973660308) internal successors, (1768), 1147 states have internal predecessors, (1768), 270 states have call successors, (270), 63 states have call predecessors, (270), 60 states have return successors, (276), 258 states have call predecessors, (276), 265 states have call successors, (276) [2021-11-19 14:23:09,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1432 states to 1432 states and 2314 transitions. [2021-11-19 14:23:09,228 INFO L78 Accepts]: Start accepts. Automaton has 1432 states and 2314 transitions. Word has length 93 [2021-11-19 14:23:09,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:23:09,231 INFO L470 AbstractCegarLoop]: Abstraction has 1432 states and 2314 transitions. [2021-11-19 14:23:09,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.25) internal successors, (114), 8 states have internal predecessors, (114), 6 states have call successors, (22), 4 states have call predecessors, (22), 4 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2021-11-19 14:23:09,231 INFO L276 IsEmpty]: Start isEmpty. Operand 1432 states and 2314 transitions. [2021-11-19 14:23:09,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-19 14:23:09,235 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:23:09,235 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:23:09,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 14:23:09,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:23:09,458 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:23:09,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:23:09,459 INFO L85 PathProgramCache]: Analyzing trace with hash 204066973, now seen corresponding path program 1 times [2021-11-19 14:23:09,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:23:09,460 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [260540860] [2021-11-19 14:23:09,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:23:09,460 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:23:09,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:23:09,462 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:23:09,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 14:23:09,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:23:09,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 806 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:23:09,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:23:10,252 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 14:23:10,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:23:10,587 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 14:23:10,587 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:23:10,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [260540860] [2021-11-19 14:23:10,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [260540860] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:23:10,588 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:23:10,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-11-19 14:23:10,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898195277] [2021-11-19 14:23:10,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:23:10,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:23:10,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:23:10,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:23:10,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:23:10,590 INFO L87 Difference]: Start difference. First operand 1432 states and 2314 transitions. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 5 states have internal predecessors, (74), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-19 14:23:11,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:23:11,774 INFO L93 Difference]: Finished difference Result 3831 states and 6293 transitions. [2021-11-19 14:23:11,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:23:11,776 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 5 states have internal predecessors, (74), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 98 [2021-11-19 14:23:11,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:23:11,805 INFO L225 Difference]: With dead ends: 3831 [2021-11-19 14:23:11,805 INFO L226 Difference]: Without dead ends: 2417 [2021-11-19 14:23:11,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 186 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 14:23:11,824 INFO L933 BasicCegarLoop]: 1057 mSDtfsCounter, 829 mSDsluCounter, 3832 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 834 SdHoareTripleChecker+Valid, 4889 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:23:11,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [834 Valid, 4889 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 14:23:11,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2417 states. [2021-11-19 14:23:11,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2417 to 2407. [2021-11-19 14:23:12,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2407 states, 1849 states have (on average 1.613304488912926) internal successors, (2983), 1927 states have internal predecessors, (2983), 452 states have call successors, (452), 102 states have call predecessors, (452), 105 states have return successors, (502), 439 states have call predecessors, (502), 445 states have call successors, (502) [2021-11-19 14:23:12,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2407 states to 2407 states and 3937 transitions. [2021-11-19 14:23:12,033 INFO L78 Accepts]: Start accepts. Automaton has 2407 states and 3937 transitions. Word has length 98 [2021-11-19 14:23:12,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:23:12,034 INFO L470 AbstractCegarLoop]: Abstraction has 2407 states and 3937 transitions. [2021-11-19 14:23:12,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 5 states have internal predecessors, (74), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-19 14:23:12,034 INFO L276 IsEmpty]: Start isEmpty. Operand 2407 states and 3937 transitions. [2021-11-19 14:23:12,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-19 14:23:12,039 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:23:12,039 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:23:12,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 14:23:12,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:23:12,263 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:23:12,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:23:12,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1972797999, now seen corresponding path program 1 times [2021-11-19 14:23:12,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:23:12,265 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2090348869] [2021-11-19 14:23:12,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:23:12,265 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:23:12,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:23:12,267 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:23:12,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 14:23:12,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:23:12,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 814 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:23:12,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:23:12,985 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 14:23:12,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:23:13,304 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 14:23:13,304 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:23:13,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2090348869] [2021-11-19 14:23:13,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2090348869] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:23:13,305 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:23:13,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-19 14:23:13,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058669161] [2021-11-19 14:23:13,305 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:23:13,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:23:13,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:23:13,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:23:13,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:23:13,306 INFO L87 Difference]: Start difference. First operand 2407 states and 3937 transitions. Second operand has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 6 states have internal predecessors, (118), 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 14:23:16,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:23:16,243 INFO L93 Difference]: Finished difference Result 8699 states and 14986 transitions. [2021-11-19 14:23:16,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:23:16,245 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 6 states have internal predecessors, (118), 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 101 [2021-11-19 14:23:16,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:23:16,330 INFO L225 Difference]: With dead ends: 8699 [2021-11-19 14:23:16,330 INFO L226 Difference]: Without dead ends: 6310 [2021-11-19 14:23:16,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:23:16,363 INFO L933 BasicCegarLoop]: 1279 mSDtfsCounter, 1135 mSDsluCounter, 5213 mSDsCounter, 0 mSdLazyCounter, 967 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1221 SdHoareTripleChecker+Valid, 6492 SdHoareTripleChecker+Invalid, 1065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:23:16,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1221 Valid, 6492 Invalid, 1065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 967 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-11-19 14:23:16,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6310 states. [2021-11-19 14:23:16,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6310 to 4738. [2021-11-19 14:23:16,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4738 states, 3645 states have (on average 1.6085048010973937) internal successors, (5863), 3804 states have internal predecessors, (5863), 874 states have call successors, (874), 201 states have call predecessors, (874), 218 states have return successors, (1168), 856 states have call predecessors, (1168), 862 states have call successors, (1168) [2021-11-19 14:23:16,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4738 states to 4738 states and 7905 transitions. [2021-11-19 14:23:16,871 INFO L78 Accepts]: Start accepts. Automaton has 4738 states and 7905 transitions. Word has length 101 [2021-11-19 14:23:16,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:23:16,872 INFO L470 AbstractCegarLoop]: Abstraction has 4738 states and 7905 transitions. [2021-11-19 14:23:16,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 6 states have internal predecessors, (118), 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 14:23:16,873 INFO L276 IsEmpty]: Start isEmpty. Operand 4738 states and 7905 transitions. [2021-11-19 14:23:16,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-19 14:23:16,880 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:23:16,880 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:23:16,905 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-19 14:23:17,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:23:17,097 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:23:17,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:23:17,097 INFO L85 PathProgramCache]: Analyzing trace with hash -226788623, now seen corresponding path program 1 times [2021-11-19 14:23:17,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:23:17,098 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [446475752] [2021-11-19 14:23:17,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:23:17,098 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:23:17,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:23:17,101 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:23:17,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 14:23:17,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:23:17,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 815 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:23:17,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:23:17,762 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 14:23:17,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:23:18,031 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 14:23:18,031 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:23:18,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [446475752] [2021-11-19 14:23:18,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [446475752] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:23:18,031 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:23:18,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-19 14:23:18,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155151049] [2021-11-19 14:23:18,032 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:23:18,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:23:18,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:23:18,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:23:18,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:23:18,034 INFO L87 Difference]: Start difference. First operand 4738 states and 7905 transitions. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-19 14:23:18,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:23:18,514 INFO L93 Difference]: Finished difference Result 9488 states and 16032 transitions. [2021-11-19 14:23:18,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:23:18,515 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 102 [2021-11-19 14:23:18,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:23:18,580 INFO L225 Difference]: With dead ends: 9488 [2021-11-19 14:23:18,581 INFO L226 Difference]: Without dead ends: 4768 [2021-11-19 14:23:18,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 199 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 14:23:18,636 INFO L933 BasicCegarLoop]: 823 mSDtfsCounter, 30 mSDsluCounter, 810 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 1633 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:23:18,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 1633 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:23:18,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4768 states. [2021-11-19 14:23:18,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4768 to 4758. [2021-11-19 14:23:19,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4758 states, 3660 states have (on average 1.6046448087431695) internal successors, (5873), 3819 states have internal predecessors, (5873), 874 states have call successors, (874), 211 states have call predecessors, (874), 223 states have return successors, (1141), 851 states have call predecessors, (1141), 862 states have call successors, (1141) [2021-11-19 14:23:19,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4758 states to 4758 states and 7888 transitions. [2021-11-19 14:23:19,090 INFO L78 Accepts]: Start accepts. Automaton has 4758 states and 7888 transitions. Word has length 102 [2021-11-19 14:23:19,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:23:19,091 INFO L470 AbstractCegarLoop]: Abstraction has 4758 states and 7888 transitions. [2021-11-19 14:23:19,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-19 14:23:19,093 INFO L276 IsEmpty]: Start isEmpty. Operand 4758 states and 7888 transitions. [2021-11-19 14:23:19,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-19 14:23:19,097 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:23:19,097 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, 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 14:23:19,119 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-19 14:23:19,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:23:19,305 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:23:19,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:23:19,305 INFO L85 PathProgramCache]: Analyzing trace with hash -468332789, now seen corresponding path program 1 times [2021-11-19 14:23:19,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:23:19,307 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1035976128] [2021-11-19 14:23:19,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:23:19,307 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:23:19,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:23:19,309 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:23:19,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-19 14:23:19,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:23:19,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 827 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:23:19,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:23:20,129 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 14:23:20,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:23:20,496 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 14:23:20,496 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:23:20,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1035976128] [2021-11-19 14:23:20,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1035976128] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:23:20,496 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:23:20,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-19 14:23:20,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186993026] [2021-11-19 14:23:20,497 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:23:20,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:23:20,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:23:20,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:23:20,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:23:20,499 INFO L87 Difference]: Start difference. First operand 4758 states and 7888 transitions. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 6 states have internal predecessors, (127), 3 states have call successors, (27), 3 states have call predecessors, (27), 5 states have return successors, (25), 4 states have call predecessors, (25), 3 states have call successors, (25) [2021-11-19 14:23:23,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:23:23,557 INFO L93 Difference]: Finished difference Result 17410 states and 30875 transitions. [2021-11-19 14:23:23,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:23:23,559 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 6 states have internal predecessors, (127), 3 states have call successors, (27), 3 states have call predecessors, (27), 5 states have return successors, (25), 4 states have call predecessors, (25), 3 states have call successors, (25) Word has length 110 [2021-11-19 14:23:23,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:23:23,702 INFO L225 Difference]: With dead ends: 17410 [2021-11-19 14:23:23,702 INFO L226 Difference]: Without dead ends: 12670 [2021-11-19 14:23:23,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:23:23,753 INFO L933 BasicCegarLoop]: 1286 mSDtfsCounter, 1099 mSDsluCounter, 5253 mSDsCounter, 0 mSdLazyCounter, 966 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1167 SdHoareTripleChecker+Valid, 6539 SdHoareTripleChecker+Invalid, 1056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 966 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:23:23,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1167 Valid, 6539 Invalid, 1056 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 966 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-11-19 14:23:23,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12670 states. [2021-11-19 14:23:24,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12670 to 9490. [2021-11-19 14:23:24,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9490 states, 7302 states have (on average 1.5999726102437688) internal successors, (11683), 7628 states have internal predecessors, (11683), 1723 states have call successors, (1723), 419 states have call predecessors, (1723), 464 states have return successors, (2700), 1690 states have call predecessors, (2700), 1701 states have call successors, (2700) [2021-11-19 14:23:24,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9490 states to 9490 states and 16106 transitions. [2021-11-19 14:23:24,870 INFO L78 Accepts]: Start accepts. Automaton has 9490 states and 16106 transitions. Word has length 110 [2021-11-19 14:23:24,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:23:24,871 INFO L470 AbstractCegarLoop]: Abstraction has 9490 states and 16106 transitions. [2021-11-19 14:23:24,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 6 states have internal predecessors, (127), 3 states have call successors, (27), 3 states have call predecessors, (27), 5 states have return successors, (25), 4 states have call predecessors, (25), 3 states have call successors, (25) [2021-11-19 14:23:24,872 INFO L276 IsEmpty]: Start isEmpty. Operand 9490 states and 16106 transitions. [2021-11-19 14:23:24,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-19 14:23:24,882 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:23:24,882 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, 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 14:23:24,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-19 14:23:25,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:23:25,110 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:23:25,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:23:25,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1224110669, now seen corresponding path program 1 times [2021-11-19 14:23:25,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:23:25,112 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1446176923] [2021-11-19 14:23:25,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:23:25,112 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:23:25,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:23:25,113 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:23:25,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 14:23:25,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:23:25,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 828 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:23:25,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:23:25,862 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 14:23:25,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:23:26,124 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 14:23:26,124 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:23:26,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1446176923] [2021-11-19 14:23:26,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1446176923] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:23:26,125 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:23:26,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-19 14:23:26,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280005600] [2021-11-19 14:23:26,125 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:23:26,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:23:26,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:23:26,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:23:26,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:23:26,127 INFO L87 Difference]: Start difference. First operand 9490 states and 16106 transitions. Second operand has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-19 14:23:26,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:23:26,903 INFO L93 Difference]: Finished difference Result 19082 states and 32909 transitions. [2021-11-19 14:23:26,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:23:26,904 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 111 [2021-11-19 14:23:26,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:23:26,981 INFO L225 Difference]: With dead ends: 19082 [2021-11-19 14:23:26,982 INFO L226 Difference]: Without dead ends: 9610 [2021-11-19 14:23:27,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 218 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 14:23:27,195 INFO L933 BasicCegarLoop]: 821 mSDtfsCounter, 27 mSDsluCounter, 1619 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 2440 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:23:27,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 2440 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:23:27,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9610 states. [2021-11-19 14:23:27,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9610 to 9590. [2021-11-19 14:23:27,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9590 states, 7392 states have (on average 1.5940205627705628) internal successors, (11783), 7698 states have internal predecessors, (11783), 1723 states have call successors, (1723), 459 states have call predecessors, (1723), 474 states have return successors, (2658), 1680 states have call predecessors, (2658), 1701 states have call successors, (2658) [2021-11-19 14:23:28,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9590 states to 9590 states and 16164 transitions. [2021-11-19 14:23:28,019 INFO L78 Accepts]: Start accepts. Automaton has 9590 states and 16164 transitions. Word has length 111 [2021-11-19 14:23:28,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:23:28,020 INFO L470 AbstractCegarLoop]: Abstraction has 9590 states and 16164 transitions. [2021-11-19 14:23:28,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-19 14:23:28,021 INFO L276 IsEmpty]: Start isEmpty. Operand 9590 states and 16164 transitions. [2021-11-19 14:23:28,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-19 14:23:28,025 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:23:28,025 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, 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 14:23:28,045 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-19 14:23:28,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:23:28,235 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:23:28,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:23:28,236 INFO L85 PathProgramCache]: Analyzing trace with hash -902491661, now seen corresponding path program 1 times [2021-11-19 14:23:28,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:23:28,236 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [319050159] [2021-11-19 14:23:28,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:23:28,237 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:23:28,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:23:28,239 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:23:28,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-19 14:23:28,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:23:28,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:23:28,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:23:28,950 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 14:23:28,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:23:29,316 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 14:23:29,316 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:23:29,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [319050159] [2021-11-19 14:23:29,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [319050159] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:23:29,317 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:23:29,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-19 14:23:29,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413197832] [2021-11-19 14:23:29,318 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:23:29,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:23:29,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:23:29,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:23:29,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:23:29,320 INFO L87 Difference]: Start difference. First operand 9590 states and 16164 transitions. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 6 states have internal predecessors, (134), 3 states have call successors, (29), 3 states have call predecessors, (29), 5 states have return successors, (27), 4 states have call predecessors, (27), 3 states have call successors, (27) [2021-11-19 14:23:32,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:23:32,556 INFO L93 Difference]: Finished difference Result 35010 states and 64612 transitions. [2021-11-19 14:23:32,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:23:32,559 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 6 states have internal predecessors, (134), 3 states have call successors, (29), 3 states have call predecessors, (29), 5 states have return successors, (27), 4 states have call predecessors, (27), 3 states have call successors, (27) Word has length 120 [2021-11-19 14:23:32,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:23:32,838 INFO L225 Difference]: With dead ends: 35010 [2021-11-19 14:23:32,838 INFO L226 Difference]: Without dead ends: 25438 [2021-11-19 14:23:33,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 233 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 14:23:33,239 INFO L933 BasicCegarLoop]: 1289 mSDtfsCounter, 1082 mSDsluCounter, 4352 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1152 SdHoareTripleChecker+Valid, 5641 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:23:33,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1152 Valid, 5641 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-19 14:23:33,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25438 states. [2021-11-19 14:23:34,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25438 to 19234. [2021-11-19 14:23:35,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19234 states, 14821 states have (on average 1.5889616085284395) internal successors, (23550), 15451 states have internal predecessors, (23550), 3426 states have call successors, (3426), 915 states have call predecessors, (3426), 986 states have return successors, (6473), 3363 states have call predecessors, (6473), 3384 states have call successors, (6473) [2021-11-19 14:23:35,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19234 states to 19234 states and 33449 transitions. [2021-11-19 14:23:35,470 INFO L78 Accepts]: Start accepts. Automaton has 19234 states and 33449 transitions. Word has length 120 [2021-11-19 14:23:35,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:23:35,471 INFO L470 AbstractCegarLoop]: Abstraction has 19234 states and 33449 transitions. [2021-11-19 14:23:35,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 6 states have internal predecessors, (134), 3 states have call successors, (29), 3 states have call predecessors, (29), 5 states have return successors, (27), 4 states have call predecessors, (27), 3 states have call successors, (27) [2021-11-19 14:23:35,472 INFO L276 IsEmpty]: Start isEmpty. Operand 19234 states and 33449 transitions. [2021-11-19 14:23:35,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-19 14:23:35,476 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:23:35,476 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, 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 14:23:35,502 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-11-19 14:23:35,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:23:35,697 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:23:35,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:23:35,697 INFO L85 PathProgramCache]: Analyzing trace with hash 466629917, now seen corresponding path program 1 times [2021-11-19 14:23:35,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:23:35,698 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [156055538] [2021-11-19 14:23:35,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:23:35,699 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:23:35,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:23:35,700 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:23:35,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-19 14:23:36,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:23:36,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 842 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:23:36,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:23:36,323 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 14:23:36,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:23:36,636 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 14:23:36,636 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:23:36,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [156055538] [2021-11-19 14:23:36,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [156055538] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:23:36,637 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:23:36,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-19 14:23:36,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904856590] [2021-11-19 14:23:36,638 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:23:36,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:23:36,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:23:36,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:23:36,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:23:36,640 INFO L87 Difference]: Start difference. First operand 19234 states and 33449 transitions. Second operand has 5 states, 5 states have (on average 21.6) internal successors, (108), 5 states have internal predecessors, (108), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-19 14:23:38,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:23:38,280 INFO L93 Difference]: Finished difference Result 38690 states and 68921 transitions. [2021-11-19 14:23:38,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:23:38,281 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 5 states have internal predecessors, (108), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 121 [2021-11-19 14:23:38,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:23:38,416 INFO L225 Difference]: With dead ends: 38690 [2021-11-19 14:23:38,417 INFO L226 Difference]: Without dead ends: 19474 [2021-11-19 14:23:38,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 238 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 14:23:38,896 INFO L933 BasicCegarLoop]: 821 mSDtfsCounter, 27 mSDsluCounter, 1619 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 2440 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:23:38,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 2440 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:23:38,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19474 states. [2021-11-19 14:23:40,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19474 to 19434. [2021-11-19 14:23:40,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19434 states, 15001 states have (on average 1.5832277848143457) internal successors, (23750), 15631 states have internal predecessors, (23750), 3426 states have call successors, (3426), 955 states have call predecessors, (3426), 1006 states have return successors, (6413), 3343 states have call predecessors, (6413), 3384 states have call successors, (6413) [2021-11-19 14:23:40,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19434 states to 19434 states and 33589 transitions. [2021-11-19 14:23:40,686 INFO L78 Accepts]: Start accepts. Automaton has 19434 states and 33589 transitions. Word has length 121 [2021-11-19 14:23:40,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:23:40,687 INFO L470 AbstractCegarLoop]: Abstraction has 19434 states and 33589 transitions. [2021-11-19 14:23:40,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 5 states have internal predecessors, (108), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-19 14:23:40,687 INFO L276 IsEmpty]: Start isEmpty. Operand 19434 states and 33589 transitions. [2021-11-19 14:23:40,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-19 14:23:40,692 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:23:40,692 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, 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 14:23:40,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-19 14:23:40,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:23:40,916 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:23:40,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:23:40,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1042938137, now seen corresponding path program 1 times [2021-11-19 14:23:40,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:23:40,917 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [360129436] [2021-11-19 14:23:40,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:23:40,918 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:23:40,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:23:40,919 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:23:40,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-19 14:23:41,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:23:41,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 856 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:23:41,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:23:41,833 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 14:23:41,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:23:42,203 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 14:23:42,203 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:23:42,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [360129436] [2021-11-19 14:23:42,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [360129436] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:23:42,204 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:23:42,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-19 14:23:42,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620044083] [2021-11-19 14:23:42,208 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:23:42,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:23:42,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:23:42,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:23:42,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:23:42,210 INFO L87 Difference]: Start difference. First operand 19434 states and 33589 transitions. Second operand has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 6 states have internal predecessors, (141), 3 states have call successors, (31), 3 states have call predecessors, (31), 5 states have return successors, (29), 4 states have call predecessors, (29), 3 states have call successors, (29) [2021-11-19 14:23:48,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:23:48,426 INFO L93 Difference]: Finished difference Result 70602 states and 138638 transitions. [2021-11-19 14:23:48,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:23:48,428 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 6 states have internal predecessors, (141), 3 states have call successors, (31), 3 states have call predecessors, (31), 5 states have return successors, (29), 4 states have call predecessors, (29), 3 states have call successors, (29) Word has length 131 [2021-11-19 14:23:48,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:23:48,966 INFO L225 Difference]: With dead ends: 70602 [2021-11-19 14:23:48,967 INFO L226 Difference]: Without dead ends: 51186 [2021-11-19 14:23:49,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:23:49,706 INFO L933 BasicCegarLoop]: 1139 mSDtfsCounter, 1138 mSDsluCounter, 4840 mSDsCounter, 0 mSdLazyCounter, 824 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1204 SdHoareTripleChecker+Valid, 5979 SdHoareTripleChecker+Invalid, 965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:23:49,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1204 Valid, 5979 Invalid, 965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 824 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-19 14:23:49,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51186 states. [2021-11-19 14:23:53,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51186 to 39062. [2021-11-19 14:23:53,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39062 states, 30134 states have (on average 1.5783168513970929) internal successors, (47561), 31432 states have internal predecessors, (47561), 6837 states have call successors, (6837), 1907 states have call predecessors, (6837), 2090 states have return successors, (16336), 6714 states have call predecessors, (16336), 6755 states have call successors, (16336) [2021-11-19 14:23:54,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39062 states to 39062 states and 70734 transitions. [2021-11-19 14:23:54,516 INFO L78 Accepts]: Start accepts. Automaton has 39062 states and 70734 transitions. Word has length 131 [2021-11-19 14:23:54,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:23:54,533 INFO L470 AbstractCegarLoop]: Abstraction has 39062 states and 70734 transitions. [2021-11-19 14:23:54,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 6 states have internal predecessors, (141), 3 states have call successors, (31), 3 states have call predecessors, (31), 5 states have return successors, (29), 4 states have call predecessors, (29), 3 states have call successors, (29) [2021-11-19 14:23:54,534 INFO L276 IsEmpty]: Start isEmpty. Operand 39062 states and 70734 transitions. [2021-11-19 14:23:54,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-19 14:23:54,537 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:23:54,538 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, 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 14:23:54,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-19 14:23:54,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:23:54,739 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:23:54,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:23:54,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1711180495, now seen corresponding path program 1 times [2021-11-19 14:23:54,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:23:54,740 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1282313306] [2021-11-19 14:23:54,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:23:54,741 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:23:54,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:23:54,743 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:23:54,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-19 14:23:55,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:23:55,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 856 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:23:55,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:23:55,526 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 14:23:55,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:23:55,983 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 14:23:55,983 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:23:55,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1282313306] [2021-11-19 14:23:55,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1282313306] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:23:55,984 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:23:55,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-19 14:23:55,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559430358] [2021-11-19 14:23:55,984 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:23:55,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:23:55,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:23:55,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:23:55,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:23:55,986 INFO L87 Difference]: Start difference. First operand 39062 states and 70734 transitions. Second operand has 8 states, 8 states have (on average 20.125) internal successors, (161), 8 states have internal predecessors, (161), 4 states have call successors, (32), 4 states have call predecessors, (32), 6 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2021-11-19 14:24:03,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:24:03,758 INFO L93 Difference]: Finished difference Result 86100 states and 164983 transitions. [2021-11-19 14:24:03,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 14:24:03,760 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 20.125) internal successors, (161), 8 states have internal predecessors, (161), 4 states have call successors, (32), 4 states have call predecessors, (32), 6 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) Word has length 132 [2021-11-19 14:24:03,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:24:04,458 INFO L225 Difference]: With dead ends: 86100 [2021-11-19 14:24:04,458 INFO L226 Difference]: Without dead ends: 47056 [2021-11-19 14:24:05,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:24:05,208 INFO L933 BasicCegarLoop]: 1250 mSDtfsCounter, 1691 mSDsluCounter, 3983 mSDsCounter, 0 mSdLazyCounter, 2221 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1780 SdHoareTripleChecker+Valid, 5233 SdHoareTripleChecker+Invalid, 2349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 2221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:24:05,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1780 Valid, 5233 Invalid, 2349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 2221 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-11-19 14:24:05,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47056 states. [2021-11-19 14:24:08,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47056 to 42334. [2021-11-19 14:24:08,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42334 states, 32754 states have (on average 1.582860108689015) internal successors, (51845), 34144 states have internal predecessors, (51845), 7205 states have call successors, (7205), 2179 states have call predecessors, (7205), 2374 states have return successors, (17936), 7002 states have call predecessors, (17936), 7123 states have call successors, (17936) [2021-11-19 14:24:09,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42334 states to 42334 states and 76986 transitions. [2021-11-19 14:24:09,252 INFO L78 Accepts]: Start accepts. Automaton has 42334 states and 76986 transitions. Word has length 132 [2021-11-19 14:24:09,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:24:09,253 INFO L470 AbstractCegarLoop]: Abstraction has 42334 states and 76986 transitions. [2021-11-19 14:24:09,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.125) internal successors, (161), 8 states have internal predecessors, (161), 4 states have call successors, (32), 4 states have call predecessors, (32), 6 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2021-11-19 14:24:09,253 INFO L276 IsEmpty]: Start isEmpty. Operand 42334 states and 76986 transitions. [2021-11-19 14:24:09,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-19 14:24:09,255 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:24:09,256 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, 1, 1, 1, 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 14:24:09,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-19 14:24:09,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:24:09,461 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:24:09,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:24:09,462 INFO L85 PathProgramCache]: Analyzing trace with hash 257938409, now seen corresponding path program 1 times [2021-11-19 14:24:09,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:24:09,463 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1878700011] [2021-11-19 14:24:09,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:24:09,464 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:24:09,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:24:09,465 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:24:09,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-19 14:24:09,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:24:09,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 860 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:24:09,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:24:10,089 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 14:24:10,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:24:10,390 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 14:24:10,390 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:24:10,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1878700011] [2021-11-19 14:24:10,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1878700011] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:24:10,391 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:24:10,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 14:24:10,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754649220] [2021-11-19 14:24:10,392 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:24:10,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:24:10,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:24:10,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:24:10,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:24:10,394 INFO L87 Difference]: Start difference. First operand 42334 states and 76986 transitions. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-19 14:24:15,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:24:15,868 INFO L93 Difference]: Finished difference Result 87282 states and 165749 transitions. [2021-11-19 14:24:15,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:24:15,868 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 136 [2021-11-19 14:24:15,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:24:16,252 INFO L225 Difference]: With dead ends: 87282 [2021-11-19 14:24:16,252 INFO L226 Difference]: Without dead ends: 50802 [2021-11-19 14:24:16,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:24:16,652 INFO L933 BasicCegarLoop]: 910 mSDtfsCounter, 324 mSDsluCounter, 2542 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 3452 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:24:16,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [369 Valid, 3452 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 14:24:16,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50802 states. [2021-11-19 14:24:20,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50802 to 42854. [2021-11-19 14:24:20,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42854 states, 33184 states have (on average 1.5789235776277724) internal successors, (52395), 34574 states have internal predecessors, (52395), 7265 states have call successors, (7265), 2179 states have call predecessors, (7265), 2404 states have return successors, (18256), 7062 states have call predecessors, (18256), 7183 states have call successors, (18256) [2021-11-19 14:24:20,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42854 states to 42854 states and 77916 transitions. [2021-11-19 14:24:20,736 INFO L78 Accepts]: Start accepts. Automaton has 42854 states and 77916 transitions. Word has length 136 [2021-11-19 14:24:20,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:24:20,737 INFO L470 AbstractCegarLoop]: Abstraction has 42854 states and 77916 transitions. [2021-11-19 14:24:20,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-19 14:24:20,737 INFO L276 IsEmpty]: Start isEmpty. Operand 42854 states and 77916 transitions. [2021-11-19 14:24:20,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-19 14:24:20,741 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:24:20,741 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 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] [2021-11-19 14:24:20,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-19 14:24:20,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:24:20,957 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:24:20,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:24:20,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1523519359, now seen corresponding path program 1 times [2021-11-19 14:24:20,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:24:20,958 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1280981398] [2021-11-19 14:24:20,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:24:20,958 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:24:20,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:24:20,959 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:24:20,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5814c8cb-a96b-431d-a61c-aa300f20c450/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-19 14:24:21,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:24:21,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:24:21,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:24:21,684 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-19 14:24:21,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:24:22,153 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-19 14:24:22,154 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:24:22,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1280981398] [2021-11-19 14:24:22,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1280981398] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:24:22,154 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:24:22,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-11-19 14:24:22,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019454142] [2021-11-19 14:24:22,154 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:24:22,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 14:24:22,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:24:22,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 14:24:22,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:24:22,156 INFO L87 Difference]: Start difference. First operand 42854 states and 77916 transitions. Second operand has 10 states, 10 states have (on average 15.5) internal successors, (155), 8 states have internal predecessors, (155), 4 states have call successors, (30), 4 states have call predecessors, (30), 6 states have return successors, (29), 6 states have call predecessors, (29), 4 states have call successors, (29)