./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product27.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product27.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH --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 b90339f9090766921b1c16763101e1e0bf56713d98b802bfaa51b02dabc40a61 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:26:27,723 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:26:27,726 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:26:27,791 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:26:27,793 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:26:27,800 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:26:27,805 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:26:27,808 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:26:27,812 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:26:27,813 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:26:27,815 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:26:27,818 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:26:27,818 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:26:27,820 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:26:27,823 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:26:27,831 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:26:27,834 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:26:27,836 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:26:27,843 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:26:27,847 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:26:27,856 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:26:27,858 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:26:27,861 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:26:27,864 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:26:27,871 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:26:27,872 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:26:27,872 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:26:27,874 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:26:27,875 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:26:27,877 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:26:27,877 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:26:27,879 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:26:27,880 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:26:27,881 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:26:27,883 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:26:27,884 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:26:27,885 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:26:27,885 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:26:27,886 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:26:27,887 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:26:27,888 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:26:27,890 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 04:26:27,951 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:26:27,952 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:26:27,953 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:26:27,953 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:26:27,954 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:26:27,954 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:26:27,954 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 04:26:27,955 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:26:27,955 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:26:27,955 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 04:26:27,956 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 04:26:27,956 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:26:27,956 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 04:26:27,957 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 04:26:27,957 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 04:26:27,958 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:26:27,958 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:26:27,959 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 04:26:27,959 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:26:27,959 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:26:27,960 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 04:26:27,960 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:26:27,960 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 04:26:27,960 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:26:27,961 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:26:27,961 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 04:26:27,961 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:26:27,962 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 04:26:27,962 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:26:27,962 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:26:27,963 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:26:27,963 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:26:27,964 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:26:27,964 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 04:26:27,964 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 04:26:27,964 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 04:26:27,965 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 04:26:27,965 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:26:27,966 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:26:27,966 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_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b90339f9090766921b1c16763101e1e0bf56713d98b802bfaa51b02dabc40a61 [2021-11-03 04:26:28,324 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:26:28,353 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:26:28,356 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:26:28,358 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:26:28,359 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:26:28,360 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/product-lines/elevator_spec1_product27.cil.c [2021-11-03 04:26:28,472 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/data/347d24415/d335ace23e32440c9299562fc78eb30e/FLAG4567f6270 [2021-11-03 04:26:29,248 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:26:29,253 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/sv-benchmarks/c/product-lines/elevator_spec1_product27.cil.c [2021-11-03 04:26:29,296 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/data/347d24415/d335ace23e32440c9299562fc78eb30e/FLAG4567f6270 [2021-11-03 04:26:29,402 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/data/347d24415/d335ace23e32440c9299562fc78eb30e [2021-11-03 04:26:29,405 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:26:29,408 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:26:29,431 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:26:29,432 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:26:29,436 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:26:29,437 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:26:29" (1/1) ... [2021-11-03 04:26:29,440 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f03ec60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:26:29, skipping insertion in model container [2021-11-03 04:26:29,441 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:26:29" (1/1) ... [2021-11-03 04:26:29,451 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:26:29,548 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:26:30,072 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/sv-benchmarks/c/product-lines/elevator_spec1_product27.cil.c[35415,35428] [2021-11-03 04:26:30,291 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:26:30,308 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) [2021-11-03 04:26:30,309 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@619b5ead and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:26:30, skipping insertion in model container [2021-11-03 04:26:30,309 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:26:30,310 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-03 04:26:30,314 INFO L168 Benchmark]: Toolchain (without parser) took 903.08 ms. Allocated memory was 88.1 MB in the beginning and 107.0 MB in the end (delta: 18.9 MB). Free memory was 48.4 MB in the beginning and 67.5 MB in the end (delta: -19.1 MB). Peak memory consumption was 265.6 kB. Max. memory is 16.1 GB. [2021-11-03 04:26:30,316 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 88.1 MB. Free memory was 67.7 MB in the beginning and 67.7 MB in the end (delta: 69.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 04:26:30,319 INFO L168 Benchmark]: CACSL2BoogieTranslator took 878.91 ms. Allocated memory is still 107.0 MB. Free memory was 85.4 MB in the beginning and 67.5 MB in the end (delta: 17.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2021-11-03 04:26:30,321 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 88.1 MB. Free memory was 67.7 MB in the beginning and 67.7 MB in the end (delta: 69.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 878.91 ms. Allocated memory is still 107.0 MB. Free memory was 85.4 MB in the beginning and 67.5 MB in the end (delta: 17.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1281]: 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_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product27.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH --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 b90339f9090766921b1c16763101e1e0bf56713d98b802bfaa51b02dabc40a61 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:26:33,046 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:26:33,051 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:26:33,121 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:26:33,121 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:26:33,123 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:26:33,125 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:26:33,128 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:26:33,131 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:26:33,133 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:26:33,134 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:26:33,136 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:26:33,137 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:26:33,138 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:26:33,140 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:26:33,142 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:26:33,144 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:26:33,145 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:26:33,148 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:26:33,151 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:26:33,154 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:26:33,156 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:26:33,158 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:26:33,159 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:26:33,164 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:26:33,165 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:26:33,165 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:26:33,167 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:26:33,167 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:26:33,169 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:26:33,176 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:26:33,177 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:26:33,180 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:26:33,182 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:26:33,186 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:26:33,187 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:26:33,188 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:26:33,188 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:26:33,189 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:26:33,191 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:26:33,192 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:26:33,193 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-03 04:26:33,256 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:26:33,257 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:26:33,259 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:26:33,259 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:26:33,259 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:26:33,259 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:26:33,260 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:26:33,260 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:26:33,260 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:26:33,262 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:26:33,263 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:26:33,264 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:26:33,264 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:26:33,264 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 04:26:33,264 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:26:33,265 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 04:26:33,265 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:26:33,265 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 04:26:33,265 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 04:26:33,266 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:26:33,266 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 04:26:33,266 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:26:33,266 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 04:26:33,267 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:26:33,267 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 04:26:33,267 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:26:33,267 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:26:33,268 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:26:33,268 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:26:33,268 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 04:26:33,268 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 04:26:33,269 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 04:26:33,269 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 04:26:33,269 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:26:33,270 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:26:33,270 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_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b90339f9090766921b1c16763101e1e0bf56713d98b802bfaa51b02dabc40a61 [2021-11-03 04:26:33,730 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:26:33,764 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:26:33,768 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:26:33,771 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:26:33,772 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:26:33,776 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/product-lines/elevator_spec1_product27.cil.c [2021-11-03 04:26:33,864 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/data/76ec50ed2/e577561e1e8d4fc79390241f84dc49ec/FLAG49f814105 [2021-11-03 04:26:34,767 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:26:34,768 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/sv-benchmarks/c/product-lines/elevator_spec1_product27.cil.c [2021-11-03 04:26:34,801 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/data/76ec50ed2/e577561e1e8d4fc79390241f84dc49ec/FLAG49f814105 [2021-11-03 04:26:34,877 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/data/76ec50ed2/e577561e1e8d4fc79390241f84dc49ec [2021-11-03 04:26:34,880 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:26:34,883 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:26:34,886 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:26:34,887 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:26:34,892 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:26:34,893 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:26:34" (1/1) ... [2021-11-03 04:26:34,895 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f609e74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:26:34, skipping insertion in model container [2021-11-03 04:26:34,895 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:26:34" (1/1) ... [2021-11-03 04:26:34,906 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:26:35,047 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:26:35,664 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/sv-benchmarks/c/product-lines/elevator_spec1_product27.cil.c[35415,35428] [2021-11-03 04:26:35,942 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:26:35,963 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-03 04:26:36,008 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:26:36,113 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/sv-benchmarks/c/product-lines/elevator_spec1_product27.cil.c[35415,35428] [2021-11-03 04:26:36,180 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:26:36,189 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 04:26:36,270 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/sv-benchmarks/c/product-lines/elevator_spec1_product27.cil.c[35415,35428] [2021-11-03 04:26:36,347 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:26:36,387 INFO L208 MainTranslator]: Completed translation [2021-11-03 04:26:36,388 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:26:36 WrapperNode [2021-11-03 04:26:36,388 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:26:36,389 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 04:26:36,390 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 04:26:36,390 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 04:26:36,399 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:26:36" (1/1) ... [2021-11-03 04:26:36,448 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:26:36" (1/1) ... [2021-11-03 04:26:36,754 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 04:26:36,755 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 04:26:36,755 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 04:26:36,756 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 04:26:36,766 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:26:36" (1/1) ... [2021-11-03 04:26:36,767 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:26:36" (1/1) ... [2021-11-03 04:26:36,805 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:26:36" (1/1) ... [2021-11-03 04:26:36,805 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:26:36" (1/1) ... [2021-11-03 04:26:36,987 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:26:36" (1/1) ... [2021-11-03 04:26:37,069 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:26:36" (1/1) ... [2021-11-03 04:26:37,082 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:26:36" (1/1) ... [2021-11-03 04:26:37,118 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 04:26:37,120 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 04:26:37,123 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 04:26:37,124 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 04:26:37,125 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:26:36" (1/1) ... [2021-11-03 04:26:37,134 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:26:37,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:26:37,175 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 04:26:37,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 04:26:37,238 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 04:26:37,238 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-03 04:26:37,239 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 04:26:37,239 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 04:26:48,390 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 04:26:48,391 INFO L299 CfgBuilder]: Removed 649 assume(true) statements. [2021-11-03 04:26:48,399 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:26:48 BoogieIcfgContainer [2021-11-03 04:26:48,400 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 04:26:48,404 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 04:26:48,404 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 04:26:48,408 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 04:26:48,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:26:34" (1/3) ... [2021-11-03 04:26:48,410 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f15ea5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:26:48, skipping insertion in model container [2021-11-03 04:26:48,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:26:36" (2/3) ... [2021-11-03 04:26:48,411 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f15ea5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:26:48, skipping insertion in model container [2021-11-03 04:26:48,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:26:48" (3/3) ... [2021-11-03 04:26:48,413 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product27.cil.c [2021-11-03 04:26:48,420 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 04:26:48,421 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-11-03 04:26:48,506 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 04:26:48,514 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 [2021-11-03 04:26:48,514 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-03 04:26:48,607 INFO L276 IsEmpty]: Start isEmpty. Operand has 2603 states, 2597 states have (on average 1.8814016172506738) internal successors, (4886), 2602 states have internal predecessors, (4886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:26:48,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-03 04:26:48,639 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:26:48,640 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:26:48,641 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:26:48,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:26:48,649 INFO L85 PathProgramCache]: Analyzing trace with hash 548572505, now seen corresponding path program 1 times [2021-11-03 04:26:48,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:26:48,668 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [103480505] [2021-11-03 04:26:48,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:26:48,669 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:26:48,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:26:48,674 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:26:48,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 04:26:49,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:26:49,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-03 04:26:49,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:26:49,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:26:49,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:26:49,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:26:49,537 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:26:49,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [103480505] [2021-11-03 04:26:49,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [103480505] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:26:49,539 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:26:49,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 04:26:49,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181504266] [2021-11-03 04:26:49,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-03 04:26:49,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:26:49,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-03 04:26:49,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 04:26:49,575 INFO L87 Difference]: Start difference. First operand has 2603 states, 2597 states have (on average 1.8814016172506738) internal successors, (4886), 2602 states have internal predecessors, (4886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 26.5) internal successors, (53), 2 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:26:49,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:26:49,732 INFO L93 Difference]: Finished difference Result 2622 states and 4909 transitions. [2021-11-03 04:26:49,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-03 04:26:49,734 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 26.5) internal successors, (53), 2 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-03 04:26:49,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:26:49,787 INFO L225 Difference]: With dead ends: 2622 [2021-11-03 04:26:49,787 INFO L226 Difference]: Without dead ends: 2599 [2021-11-03 04:26:49,793 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 04:26:49,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2599 states. [2021-11-03 04:26:49,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2599 to 2599. [2021-11-03 04:26:49,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2599 states, 2594 states have (on average 1.8789514263685427) internal successors, (4874), 2598 states have internal predecessors, (4874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:26:49,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2599 states to 2599 states and 4874 transitions. [2021-11-03 04:26:50,000 INFO L78 Accepts]: Start accepts. Automaton has 2599 states and 4874 transitions. Word has length 53 [2021-11-03 04:26:50,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:26:50,002 INFO L470 AbstractCegarLoop]: Abstraction has 2599 states and 4874 transitions. [2021-11-03 04:26:50,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 26.5) internal successors, (53), 2 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:26:50,003 INFO L276 IsEmpty]: Start isEmpty. Operand 2599 states and 4874 transitions. [2021-11-03 04:26:50,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-03 04:26:50,009 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:26:50,010 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:26:50,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-03 04:26:50,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:26:50,226 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:26:50,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:26:50,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1767504764, now seen corresponding path program 1 times [2021-11-03 04:26:50,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:26:50,229 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [20848951] [2021-11-03 04:26:50,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:26:50,229 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:26:50,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:26:50,231 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:26:50,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 04:26:50,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:26:50,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:26:50,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:26:50,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:26:50,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:26:51,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:26:51,159 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:26:51,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [20848951] [2021-11-03 04:26:51,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [20848951] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:26:51,160 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:26:51,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:26:51,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162999984] [2021-11-03 04:26:51,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:26:51,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:26:51,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:26:51,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:26:51,171 INFO L87 Difference]: Start difference. First operand 2599 states and 4874 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:26:51,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:26:51,622 INFO L93 Difference]: Finished difference Result 7717 states and 14479 transitions. [2021-11-03 04:26:51,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:26:51,623 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-03 04:26:51,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:26:51,671 INFO L225 Difference]: With dead ends: 7717 [2021-11-03 04:26:51,671 INFO L226 Difference]: Without dead ends: 5131 [2021-11-03 04:26:51,684 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:26:51,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5131 states. [2021-11-03 04:26:51,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5131 to 2599. [2021-11-03 04:26:51,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2599 states, 2594 states have (on average 1.8762528912875867) internal successors, (4867), 2598 states have internal predecessors, (4867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:26:51,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2599 states to 2599 states and 4867 transitions. [2021-11-03 04:26:51,849 INFO L78 Accepts]: Start accepts. Automaton has 2599 states and 4867 transitions. Word has length 55 [2021-11-03 04:26:51,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:26:51,850 INFO L470 AbstractCegarLoop]: Abstraction has 2599 states and 4867 transitions. [2021-11-03 04:26:51,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:26:51,852 INFO L276 IsEmpty]: Start isEmpty. Operand 2599 states and 4867 transitions. [2021-11-03 04:26:51,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-03 04:26:51,859 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:26:51,866 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:26:51,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-03 04:26:52,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:26:52,085 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:26:52,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:26:52,086 INFO L85 PathProgramCache]: Analyzing trace with hash 76116505, now seen corresponding path program 1 times [2021-11-03 04:26:52,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:26:52,088 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [21331220] [2021-11-03 04:26:52,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:26:52,088 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:26:52,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:26:52,091 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:26:52,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-03 04:26:52,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:26:52,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 04:26:52,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:26:52,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:26:52,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:26:53,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:26:53,065 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:26:53,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [21331220] [2021-11-03 04:26:53,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [21331220] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:26:53,066 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:26:53,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 04:26:53,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593439501] [2021-11-03 04:26:53,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:26:53,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:26:53,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:26:53,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:26:53,069 INFO L87 Difference]: Start difference. First operand 2599 states and 4867 transitions. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:26:54,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:26:54,424 INFO L93 Difference]: Finished difference Result 17668 states and 33121 transitions. [2021-11-03 04:26:54,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 04:26:54,426 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-03 04:26:54,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:26:54,598 INFO L225 Difference]: With dead ends: 17668 [2021-11-03 04:26:54,599 INFO L226 Difference]: Without dead ends: 15091 [2021-11-03 04:26:54,612 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-03 04:26:54,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15091 states. [2021-11-03 04:26:54,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15091 to 2577. [2021-11-03 04:26:54,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2577 states, 2572 states have (on average 1.8724727838258164) internal successors, (4816), 2576 states have internal predecessors, (4816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:26:54,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2577 states to 2577 states and 4816 transitions. [2021-11-03 04:26:54,958 INFO L78 Accepts]: Start accepts. Automaton has 2577 states and 4816 transitions. Word has length 61 [2021-11-03 04:26:54,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:26:54,958 INFO L470 AbstractCegarLoop]: Abstraction has 2577 states and 4816 transitions. [2021-11-03 04:26:54,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:26:54,961 INFO L276 IsEmpty]: Start isEmpty. Operand 2577 states and 4816 transitions. [2021-11-03 04:26:54,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-03 04:26:54,964 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:26:54,964 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:26:54,986 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-03 04:26:55,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:26:55,178 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:26:55,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:26:55,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1836697286, now seen corresponding path program 1 times [2021-11-03 04:26:55,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:26:55,180 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [430660820] [2021-11-03 04:26:55,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:26:55,180 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:26:55,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:26:55,185 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:26:55,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-03 04:26:55,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:26:55,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:26:55,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:26:55,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:26:55,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:26:56,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:26:56,147 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:26:56,147 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [430660820] [2021-11-03 04:26:56,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [430660820] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:26:56,148 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:26:56,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:26:56,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955986327] [2021-11-03 04:26:56,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:26:56,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:26:56,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:26:56,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:26:56,150 INFO L87 Difference]: Start difference. First operand 2577 states and 4816 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:26:56,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:26:56,728 INFO L93 Difference]: Finished difference Result 7628 states and 14283 transitions. [2021-11-03 04:26:56,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:26:56,729 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-03 04:26:56,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:26:56,748 INFO L225 Difference]: With dead ends: 7628 [2021-11-03 04:26:56,748 INFO L226 Difference]: Without dead ends: 5073 [2021-11-03 04:26:56,754 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:26:56,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5073 states. [2021-11-03 04:26:56,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5073 to 2577. [2021-11-03 04:26:56,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2577 states, 2572 states have (on average 1.8681959564541213) internal successors, (4805), 2576 states have internal predecessors, (4805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:26:56,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2577 states to 2577 states and 4805 transitions. [2021-11-03 04:26:56,955 INFO L78 Accepts]: Start accepts. Automaton has 2577 states and 4805 transitions. Word has length 63 [2021-11-03 04:26:56,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:26:56,956 INFO L470 AbstractCegarLoop]: Abstraction has 2577 states and 4805 transitions. [2021-11-03 04:26:56,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:26:56,957 INFO L276 IsEmpty]: Start isEmpty. Operand 2577 states and 4805 transitions. [2021-11-03 04:26:56,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-03 04:26:56,961 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:26:56,962 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:26:56,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-03 04:26:57,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:26:57,178 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:26:57,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:26:57,178 INFO L85 PathProgramCache]: Analyzing trace with hash 249373071, now seen corresponding path program 1 times [2021-11-03 04:26:57,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:26:57,180 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [585515587] [2021-11-03 04:26:57,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:26:57,180 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:26:57,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:26:57,183 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:26:57,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-03 04:26:57,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:26:57,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-03 04:26:57,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:26:58,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:26:58,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:26:58,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:26:58,352 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:26:58,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [585515587] [2021-11-03 04:26:58,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [585515587] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:26:58,353 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:26:58,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-03 04:26:58,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481931568] [2021-11-03 04:26:58,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 04:26:58,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:26:58,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 04:26:58,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:26:58,355 INFO L87 Difference]: Start difference. First operand 2577 states and 4805 transitions. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:01,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:27:01,424 INFO L93 Difference]: Finished difference Result 27591 states and 51689 transitions. [2021-11-03 04:27:01,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 04:27:01,425 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-03 04:27:01,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:27:01,523 INFO L225 Difference]: With dead ends: 27591 [2021-11-03 04:27:01,523 INFO L226 Difference]: Without dead ends: 25039 [2021-11-03 04:27:01,536 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-11-03 04:27:01,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25039 states. [2021-11-03 04:27:01,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25039 to 2579. [2021-11-03 04:27:01,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2579 states, 2574 states have (on average 1.8655788655788657) internal successors, (4802), 2578 states have internal predecessors, (4802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:01,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2579 states to 2579 states and 4802 transitions. [2021-11-03 04:27:01,867 INFO L78 Accepts]: Start accepts. Automaton has 2579 states and 4802 transitions. Word has length 69 [2021-11-03 04:27:01,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:27:01,868 INFO L470 AbstractCegarLoop]: Abstraction has 2579 states and 4802 transitions. [2021-11-03 04:27:01,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:01,868 INFO L276 IsEmpty]: Start isEmpty. Operand 2579 states and 4802 transitions. [2021-11-03 04:27:01,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-03 04:27:01,870 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:27:01,871 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:27:01,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-03 04:27:02,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:27:02,087 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:27:02,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:27:02,088 INFO L85 PathProgramCache]: Analyzing trace with hash -986874142, now seen corresponding path program 1 times [2021-11-03 04:27:02,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:27:02,090 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [83485891] [2021-11-03 04:27:02,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:27:02,091 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:27:02,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:27:02,092 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:27:02,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-03 04:27:02,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:27:02,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-03 04:27:02,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:27:03,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:27:03,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:27:03,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:27:03,303 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:27:03,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [83485891] [2021-11-03 04:27:03,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [83485891] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:27:03,303 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:27:03,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-03 04:27:03,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021534751] [2021-11-03 04:27:03,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 04:27:03,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:27:03,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 04:27:03,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:27:03,306 INFO L87 Difference]: Start difference. First operand 2579 states and 4802 transitions. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:05,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:27:05,631 INFO L93 Difference]: Finished difference Result 27559 states and 51610 transitions. [2021-11-03 04:27:05,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 04:27:05,632 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-03 04:27:05,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:27:05,713 INFO L225 Difference]: With dead ends: 27559 [2021-11-03 04:27:05,713 INFO L226 Difference]: Without dead ends: 25007 [2021-11-03 04:27:05,724 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-11-03 04:27:05,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25007 states. [2021-11-03 04:27:06,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25007 to 2583. [2021-11-03 04:27:06,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2583 states, 2578 states have (on average 1.8638479441427462) internal successors, (4805), 2582 states have internal predecessors, (4805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:06,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2583 states to 2583 states and 4805 transitions. [2021-11-03 04:27:06,102 INFO L78 Accepts]: Start accepts. Automaton has 2583 states and 4805 transitions. Word has length 71 [2021-11-03 04:27:06,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:27:06,102 INFO L470 AbstractCegarLoop]: Abstraction has 2583 states and 4805 transitions. [2021-11-03 04:27:06,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:06,104 INFO L276 IsEmpty]: Start isEmpty. Operand 2583 states and 4805 transitions. [2021-11-03 04:27:06,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-03 04:27:06,107 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:27:06,108 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:27:06,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-03 04:27:06,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:27:06,328 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:27:06,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:27:06,329 INFO L85 PathProgramCache]: Analyzing trace with hash 353867279, now seen corresponding path program 1 times [2021-11-03 04:27:06,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:27:06,330 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2117949364] [2021-11-03 04:27:06,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:27:06,330 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:27:06,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:27:06,331 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:27:06,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-03 04:27:06,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:27:06,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:27:06,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:27:07,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:27:07,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:27:07,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:27:07,374 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:27:07,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2117949364] [2021-11-03 04:27:07,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2117949364] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:27:07,375 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:27:07,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:27:07,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139473] [2021-11-03 04:27:07,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:27:07,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:27:07,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:27:07,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:27:07,377 INFO L87 Difference]: Start difference. First operand 2583 states and 4805 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:07,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:27:07,685 INFO L93 Difference]: Finished difference Result 5114 states and 9541 transitions. [2021-11-03 04:27:07,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:27:07,685 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-03 04:27:07,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:27:07,699 INFO L225 Difference]: With dead ends: 5114 [2021-11-03 04:27:07,699 INFO L226 Difference]: Without dead ends: 2562 [2021-11-03 04:27:07,704 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:27:07,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2562 states. [2021-11-03 04:27:07,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2562 to 2562. [2021-11-03 04:27:07,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2562 states, 2557 states have (on average 1.8642940946421587) internal successors, (4767), 2561 states have internal predecessors, (4767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:07,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2562 states to 2562 states and 4767 transitions. [2021-11-03 04:27:07,884 INFO L78 Accepts]: Start accepts. Automaton has 2562 states and 4767 transitions. Word has length 73 [2021-11-03 04:27:07,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:27:07,885 INFO L470 AbstractCegarLoop]: Abstraction has 2562 states and 4767 transitions. [2021-11-03 04:27:07,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:07,885 INFO L276 IsEmpty]: Start isEmpty. Operand 2562 states and 4767 transitions. [2021-11-03 04:27:07,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-03 04:27:07,895 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:27:07,896 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:27:07,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-03 04:27:08,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:27:08,116 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:27:08,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:27:08,116 INFO L85 PathProgramCache]: Analyzing trace with hash 91803239, now seen corresponding path program 1 times [2021-11-03 04:27:08,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:27:08,118 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1681513454] [2021-11-03 04:27:08,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:27:08,118 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:27:08,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:27:08,124 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:27:08,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-03 04:27:08,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:27:08,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 04:27:08,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:27:09,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:27:09,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:27:09,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:27:09,244 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:27:09,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1681513454] [2021-11-03 04:27:09,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1681513454] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:27:09,245 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:27:09,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 04:27:09,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923988060] [2021-11-03 04:27:09,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:27:09,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:27:09,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:27:09,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:27:09,247 INFO L87 Difference]: Start difference. First operand 2562 states and 4767 transitions. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:09,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:27:09,426 INFO L93 Difference]: Finished difference Result 5058 states and 9444 transitions. [2021-11-03 04:27:09,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:27:09,427 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-03 04:27:09,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:27:09,432 INFO L225 Difference]: With dead ends: 5058 [2021-11-03 04:27:09,433 INFO L226 Difference]: Without dead ends: 2537 [2021-11-03 04:27:09,438 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:27:09,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2537 states. [2021-11-03 04:27:09,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2537 to 2537. [2021-11-03 04:27:09,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2537 states, 2532 states have (on average 1.8653238546603474) internal successors, (4723), 2536 states have internal predecessors, (4723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:09,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2537 states to 2537 states and 4723 transitions. [2021-11-03 04:27:09,767 INFO L78 Accepts]: Start accepts. Automaton has 2537 states and 4723 transitions. Word has length 74 [2021-11-03 04:27:09,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:27:09,768 INFO L470 AbstractCegarLoop]: Abstraction has 2537 states and 4723 transitions. [2021-11-03 04:27:09,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:09,769 INFO L276 IsEmpty]: Start isEmpty. Operand 2537 states and 4723 transitions. [2021-11-03 04:27:09,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-03 04:27:09,772 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:27:09,772 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:27:09,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-03 04:27:09,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:27:09,995 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:27:09,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:27:09,995 INFO L85 PathProgramCache]: Analyzing trace with hash -170481090, now seen corresponding path program 1 times [2021-11-03 04:27:09,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:27:09,996 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [753881253] [2021-11-03 04:27:09,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:27:09,997 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:27:09,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:27:09,998 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:27:10,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-03 04:27:10,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:27:10,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:27:10,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:27:10,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:27:10,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:27:11,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:27:11,111 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:27:11,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [753881253] [2021-11-03 04:27:11,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [753881253] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:27:11,112 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:27:11,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:27:11,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580491806] [2021-11-03 04:27:11,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:27:11,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:27:11,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:27:11,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:27:11,114 INFO L87 Difference]: Start difference. First operand 2537 states and 4723 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:11,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:27:11,358 INFO L93 Difference]: Finished difference Result 5033 states and 9400 transitions. [2021-11-03 04:27:11,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:27:11,359 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-03 04:27:11,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:27:11,366 INFO L225 Difference]: With dead ends: 5033 [2021-11-03 04:27:11,366 INFO L226 Difference]: Without dead ends: 2534 [2021-11-03 04:27:11,371 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:27:11,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2534 states. [2021-11-03 04:27:11,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2534 to 2534. [2021-11-03 04:27:11,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2534 states, 2529 states have (on average 1.8643732700672202) internal successors, (4715), 2533 states have internal predecessors, (4715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:11,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2534 states to 2534 states and 4715 transitions. [2021-11-03 04:27:11,630 INFO L78 Accepts]: Start accepts. Automaton has 2534 states and 4715 transitions. Word has length 75 [2021-11-03 04:27:11,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:27:11,630 INFO L470 AbstractCegarLoop]: Abstraction has 2534 states and 4715 transitions. [2021-11-03 04:27:11,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:11,631 INFO L276 IsEmpty]: Start isEmpty. Operand 2534 states and 4715 transitions. [2021-11-03 04:27:11,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-03 04:27:11,634 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:27:11,635 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:27:11,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-03 04:27:11,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:27:11,850 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:27:11,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:27:11,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1982325869, now seen corresponding path program 1 times [2021-11-03 04:27:11,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:27:11,851 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1202661665] [2021-11-03 04:27:11,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:27:11,851 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:27:11,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:27:11,852 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:27:11,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-03 04:27:12,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:27:12,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-03 04:27:12,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:27:12,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:27:12,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:27:13,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:27:13,030 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:27:13,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1202661665] [2021-11-03 04:27:13,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1202661665] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:27:13,031 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:27:13,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-03 04:27:13,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316225665] [2021-11-03 04:27:13,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 04:27:13,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:27:13,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 04:27:13,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:27:13,035 INFO L87 Difference]: Start difference. First operand 2534 states and 4715 transitions. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:13,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:27:13,314 INFO L93 Difference]: Finished difference Result 5024 states and 9382 transitions. [2021-11-03 04:27:13,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:27:13,315 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-03 04:27:13,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:27:13,320 INFO L225 Difference]: With dead ends: 5024 [2021-11-03 04:27:13,321 INFO L226 Difference]: Without dead ends: 2532 [2021-11-03 04:27:13,325 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:27:13,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2532 states. [2021-11-03 04:27:13,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2532 to 2532. [2021-11-03 04:27:13,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2532 states, 2527 states have (on average 1.8634744756628414) internal successors, (4709), 2531 states have internal predecessors, (4709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:13,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2532 states to 2532 states and 4709 transitions. [2021-11-03 04:27:13,496 INFO L78 Accepts]: Start accepts. Automaton has 2532 states and 4709 transitions. Word has length 76 [2021-11-03 04:27:13,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:27:13,497 INFO L470 AbstractCegarLoop]: Abstraction has 2532 states and 4709 transitions. [2021-11-03 04:27:13,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:13,497 INFO L276 IsEmpty]: Start isEmpty. Operand 2532 states and 4709 transitions. [2021-11-03 04:27:13,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-03 04:27:13,501 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:27:13,501 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:27:13,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-03 04:27:13,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:27:13,714 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:27:13,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:27:13,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1371725127, now seen corresponding path program 1 times [2021-11-03 04:27:13,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:27:13,715 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1968204083] [2021-11-03 04:27:13,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:27:13,715 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:27:13,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:27:13,716 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:27:13,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-03 04:27:14,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:27:14,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-03 04:27:14,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:27:14,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:27:14,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:27:14,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:27:14,778 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:27:14,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1968204083] [2021-11-03 04:27:14,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1968204083] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:27:14,779 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:27:14,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-03 04:27:14,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808683774] [2021-11-03 04:27:14,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 04:27:14,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:27:14,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 04:27:14,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:27:14,781 INFO L87 Difference]: Start difference. First operand 2532 states and 4709 transitions. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:15,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:27:15,003 INFO L93 Difference]: Finished difference Result 5017 states and 9367 transitions. [2021-11-03 04:27:15,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:27:15,003 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-03 04:27:15,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:27:15,006 INFO L225 Difference]: With dead ends: 5017 [2021-11-03 04:27:15,006 INFO L226 Difference]: Without dead ends: 2530 [2021-11-03 04:27:15,009 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:27:15,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2530 states. [2021-11-03 04:27:15,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2530 to 2530. [2021-11-03 04:27:15,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2530 states, 2525 states have (on average 1.8625742574257427) internal successors, (4703), 2529 states have internal predecessors, (4703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:15,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2530 states to 2530 states and 4703 transitions. [2021-11-03 04:27:15,168 INFO L78 Accepts]: Start accepts. Automaton has 2530 states and 4703 transitions. Word has length 77 [2021-11-03 04:27:15,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:27:15,168 INFO L470 AbstractCegarLoop]: Abstraction has 2530 states and 4703 transitions. [2021-11-03 04:27:15,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:15,169 INFO L276 IsEmpty]: Start isEmpty. Operand 2530 states and 4703 transitions. [2021-11-03 04:27:15,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-03 04:27:15,172 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:27:15,172 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:27:15,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-03 04:27:15,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:27:15,382 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:27:15,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:27:15,382 INFO L85 PathProgramCache]: Analyzing trace with hash 638306648, now seen corresponding path program 1 times [2021-11-03 04:27:15,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:27:15,383 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [799647733] [2021-11-03 04:27:15,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:27:15,383 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:27:15,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:27:15,384 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:27:15,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-03 04:27:16,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:27:16,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:27:16,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:27:16,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:27:16,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:27:16,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:27:16,700 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:27:16,701 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [799647733] [2021-11-03 04:27:16,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [799647733] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:27:16,701 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:27:16,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-03 04:27:16,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975932455] [2021-11-03 04:27:16,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:27:16,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:27:16,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:27:16,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:27:16,703 INFO L87 Difference]: Start difference. First operand 2530 states and 4703 transitions. Second operand has 6 states, 6 states have (on average 20.833333333333332) internal successors, (125), 5 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:18,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:27:18,884 INFO L93 Difference]: Finished difference Result 9216 states and 17231 transitions. [2021-11-03 04:27:18,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:27:18,885 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.833333333333332) internal successors, (125), 5 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-11-03 04:27:18,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:27:18,893 INFO L225 Difference]: With dead ends: 9216 [2021-11-03 04:27:18,893 INFO L226 Difference]: Without dead ends: 6737 [2021-11-03 04:27:18,896 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:27:18,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6737 states. [2021-11-03 04:27:19,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6737 to 2530. [2021-11-03 04:27:19,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2530 states, 2525 states have (on average 1.8221782178217822) internal successors, (4601), 2529 states have internal predecessors, (4601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:19,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2530 states to 2530 states and 4601 transitions. [2021-11-03 04:27:19,127 INFO L78 Accepts]: Start accepts. Automaton has 2530 states and 4601 transitions. Word has length 78 [2021-11-03 04:27:19,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:27:19,127 INFO L470 AbstractCegarLoop]: Abstraction has 2530 states and 4601 transitions. [2021-11-03 04:27:19,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.833333333333332) internal successors, (125), 5 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:19,128 INFO L276 IsEmpty]: Start isEmpty. Operand 2530 states and 4601 transitions. [2021-11-03 04:27:19,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-03 04:27:19,131 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:27:19,132 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:27:19,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-03 04:27:19,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:27:19,354 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:27:19,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:27:19,355 INFO L85 PathProgramCache]: Analyzing trace with hash 772472772, now seen corresponding path program 1 times [2021-11-03 04:27:19,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:27:19,356 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [676229349] [2021-11-03 04:27:19,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:27:19,356 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:27:19,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:27:19,359 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:27:19,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-03 04:27:20,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:27:20,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:27:20,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:27:20,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:27:20,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:27:20,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:27:20,829 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:27:20,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [676229349] [2021-11-03 04:27:20,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [676229349] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:27:20,830 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:27:20,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-03 04:27:20,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735732700] [2021-11-03 04:27:20,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:27:20,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:27:20,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:27:20,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:27:20,835 INFO L87 Difference]: Start difference. First operand 2530 states and 4601 transitions. Second operand has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:21,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:27:21,964 INFO L93 Difference]: Finished difference Result 7069 states and 13010 transitions. [2021-11-03 04:27:21,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-03 04:27:21,964 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-11-03 04:27:21,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:27:21,971 INFO L225 Difference]: With dead ends: 7069 [2021-11-03 04:27:21,971 INFO L226 Difference]: Without dead ends: 4608 [2021-11-03 04:27:21,975 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-11-03 04:27:21,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4608 states. [2021-11-03 04:27:22,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4608 to 2496. [2021-11-03 04:27:22,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2496 states, 2491 states have (on average 1.8221597751906864) internal successors, (4539), 2495 states have internal predecessors, (4539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:22,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2496 states to 2496 states and 4539 transitions. [2021-11-03 04:27:22,220 INFO L78 Accepts]: Start accepts. Automaton has 2496 states and 4539 transitions. Word has length 86 [2021-11-03 04:27:22,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:27:22,221 INFO L470 AbstractCegarLoop]: Abstraction has 2496 states and 4539 transitions. [2021-11-03 04:27:22,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:22,222 INFO L276 IsEmpty]: Start isEmpty. Operand 2496 states and 4539 transitions. [2021-11-03 04:27:22,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-03 04:27:22,225 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:27:22,225 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:27:22,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-03 04:27:22,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:27:22,442 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:27:22,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:27:22,442 INFO L85 PathProgramCache]: Analyzing trace with hash -603961180, now seen corresponding path program 1 times [2021-11-03 04:27:22,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:27:22,443 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1060537124] [2021-11-03 04:27:22,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:27:22,443 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:27:22,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:27:22,444 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:27:22,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-03 04:27:23,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:27:23,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:27:23,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:27:23,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:27:23,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:27:23,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:27:23,912 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:27:23,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1060537124] [2021-11-03 04:27:23,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1060537124] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:27:23,912 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:27:23,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 04:27:23,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89456915] [2021-11-03 04:27:23,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:27:23,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:27:23,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:27:23,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:27:23,915 INFO L87 Difference]: Start difference. First operand 2496 states and 4539 transitions. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:25,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:27:25,840 INFO L93 Difference]: Finished difference Result 9830 states and 18049 transitions. [2021-11-03 04:27:25,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:27:25,841 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2021-11-03 04:27:25,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:27:25,852 INFO L225 Difference]: With dead ends: 9830 [2021-11-03 04:27:25,852 INFO L226 Difference]: Without dead ends: 7402 [2021-11-03 04:27:25,857 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:27:25,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7402 states. [2021-11-03 04:27:26,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7402 to 2500. [2021-11-03 04:27:26,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2500 states, 2495 states have (on average 1.8208416833667336) internal successors, (4543), 2499 states have internal predecessors, (4543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:26,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2500 states to 2500 states and 4543 transitions. [2021-11-03 04:27:26,139 INFO L78 Accepts]: Start accepts. Automaton has 2500 states and 4543 transitions. Word has length 88 [2021-11-03 04:27:26,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:27:26,140 INFO L470 AbstractCegarLoop]: Abstraction has 2500 states and 4543 transitions. [2021-11-03 04:27:26,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:26,140 INFO L276 IsEmpty]: Start isEmpty. Operand 2500 states and 4543 transitions. [2021-11-03 04:27:26,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-03 04:27:26,144 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:27:26,144 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:27:26,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-03 04:27:26,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:27:26,358 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:27:26,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:27:26,358 INFO L85 PathProgramCache]: Analyzing trace with hash -2061004475, now seen corresponding path program 1 times [2021-11-03 04:27:26,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:27:26,359 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1794690848] [2021-11-03 04:27:26,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:27:26,359 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:27:26,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:27:26,360 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:27:26,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-03 04:27:27,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:27:27,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:27:27,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:27:27,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:27:27,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:27:27,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:27:27,868 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:27:27,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1794690848] [2021-11-03 04:27:27,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1794690848] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:27:27,869 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:27:27,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 04:27:27,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969348755] [2021-11-03 04:27:27,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:27:27,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:27:27,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:27:27,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:27:27,872 INFO L87 Difference]: Start difference. First operand 2500 states and 4543 transitions. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:29,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:27:29,510 INFO L93 Difference]: Finished difference Result 6962 states and 12742 transitions. [2021-11-03 04:27:29,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:27:29,511 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-11-03 04:27:29,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:27:29,517 INFO L225 Difference]: With dead ends: 6962 [2021-11-03 04:27:29,518 INFO L226 Difference]: Without dead ends: 4517 [2021-11-03 04:27:29,521 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:27:29,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4517 states. [2021-11-03 04:27:29,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4517 to 3442. [2021-11-03 04:27:29,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3442 states, 3437 states have (on average 1.8082630200756473) internal successors, (6215), 3441 states have internal predecessors, (6215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:29,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3442 states to 3442 states and 6215 transitions. [2021-11-03 04:27:29,777 INFO L78 Accepts]: Start accepts. Automaton has 3442 states and 6215 transitions. Word has length 89 [2021-11-03 04:27:29,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:27:29,778 INFO L470 AbstractCegarLoop]: Abstraction has 3442 states and 6215 transitions. [2021-11-03 04:27:29,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:29,779 INFO L276 IsEmpty]: Start isEmpty. Operand 3442 states and 6215 transitions. [2021-11-03 04:27:29,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-03 04:27:29,782 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:27:29,782 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:27:29,822 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-03 04:27:29,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:27:30,000 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:27:30,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:27:30,001 INFO L85 PathProgramCache]: Analyzing trace with hash -729666801, now seen corresponding path program 1 times [2021-11-03 04:27:30,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:27:30,002 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [433414589] [2021-11-03 04:27:30,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:27:30,002 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:27:30,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:27:30,003 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:27:30,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-03 04:27:31,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:27:31,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:27:31,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:27:31,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:27:31,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:27:31,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:27:31,645 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:27:31,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [433414589] [2021-11-03 04:27:31,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [433414589] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:27:31,645 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:27:31,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 04:27:31,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556162952] [2021-11-03 04:27:31,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:27:31,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:27:31,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:27:31,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:27:31,648 INFO L87 Difference]: Start difference. First operand 3442 states and 6215 transitions. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:33,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:27:33,584 INFO L93 Difference]: Finished difference Result 24628 states and 44859 transitions. [2021-11-03 04:27:33,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-03 04:27:33,585 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-11-03 04:27:33,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:27:33,618 INFO L225 Difference]: With dead ends: 24628 [2021-11-03 04:27:33,618 INFO L226 Difference]: Without dead ends: 21250 [2021-11-03 04:27:33,627 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-03 04:27:33,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21250 states. [2021-11-03 04:27:34,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21250 to 6287. [2021-11-03 04:27:34,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6287 states, 6282 states have (on average 1.8212352753900032) internal successors, (11441), 6286 states have internal predecessors, (11441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:34,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6287 states to 6287 states and 11441 transitions. [2021-11-03 04:27:34,252 INFO L78 Accepts]: Start accepts. Automaton has 6287 states and 11441 transitions. Word has length 91 [2021-11-03 04:27:34,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:27:34,252 INFO L470 AbstractCegarLoop]: Abstraction has 6287 states and 11441 transitions. [2021-11-03 04:27:34,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:34,253 INFO L276 IsEmpty]: Start isEmpty. Operand 6287 states and 11441 transitions. [2021-11-03 04:27:34,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-03 04:27:34,255 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:27:34,255 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:27:34,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-03 04:27:34,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:27:34,456 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:27:34,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:27:34,456 INFO L85 PathProgramCache]: Analyzing trace with hash -454907187, now seen corresponding path program 1 times [2021-11-03 04:27:34,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:27:34,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1319155438] [2021-11-03 04:27:34,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:27:34,457 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:27:34,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:27:34,458 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:27:34,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-03 04:27:35,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:27:35,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:27:35,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:27:35,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:27:35,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:27:36,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:27:36,095 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:27:36,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1319155438] [2021-11-03 04:27:36,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1319155438] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:27:36,095 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:27:36,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-03 04:27:36,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685633541] [2021-11-03 04:27:36,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:27:36,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:27:36,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:27:36,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:27:36,098 INFO L87 Difference]: Start difference. First operand 6287 states and 11441 transitions. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:37,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:27:37,335 INFO L93 Difference]: Finished difference Result 11356 states and 20600 transitions. [2021-11-03 04:27:37,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-03 04:27:37,335 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-11-03 04:27:37,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:27:37,348 INFO L225 Difference]: With dead ends: 11356 [2021-11-03 04:27:37,348 INFO L226 Difference]: Without dead ends: 8650 [2021-11-03 04:27:37,353 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-03 04:27:37,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8650 states. [2021-11-03 04:27:37,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8650 to 6277. [2021-11-03 04:27:37,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6277 states, 6272 states have (on average 1.820950255102041) internal successors, (11421), 6276 states have internal predecessors, (11421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:37,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6277 states to 6277 states and 11421 transitions. [2021-11-03 04:27:37,922 INFO L78 Accepts]: Start accepts. Automaton has 6277 states and 11421 transitions. Word has length 91 [2021-11-03 04:27:37,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:27:37,922 INFO L470 AbstractCegarLoop]: Abstraction has 6277 states and 11421 transitions. [2021-11-03 04:27:37,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:37,923 INFO L276 IsEmpty]: Start isEmpty. Operand 6277 states and 11421 transitions. [2021-11-03 04:27:37,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-03 04:27:37,926 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:27:37,926 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:27:37,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-03 04:27:38,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:27:38,142 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:27:38,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:27:38,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1636743277, now seen corresponding path program 1 times [2021-11-03 04:27:38,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:27:38,143 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1341107052] [2021-11-03 04:27:38,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:27:38,143 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:27:38,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:27:38,144 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:27:38,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-03 04:27:39,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:27:39,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 04:27:39,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:27:39,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:27:39,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:27:39,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:27:39,893 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:27:39,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1341107052] [2021-11-03 04:27:39,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1341107052] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:27:39,894 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:27:39,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 04:27:39,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754498589] [2021-11-03 04:27:39,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:27:39,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:27:39,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:27:39,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:27:39,896 INFO L87 Difference]: Start difference. First operand 6277 states and 11421 transitions. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:41,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:27:41,354 INFO L93 Difference]: Finished difference Result 19245 states and 35106 transitions. [2021-11-03 04:27:41,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 04:27:41,355 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-11-03 04:27:41,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:27:41,377 INFO L225 Difference]: With dead ends: 19245 [2021-11-03 04:27:41,378 INFO L226 Difference]: Without dead ends: 16545 [2021-11-03 04:27:41,383 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-03 04:27:41,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16545 states. [2021-11-03 04:27:42,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16545 to 8716. [2021-11-03 04:27:42,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8716 states, 8711 states have (on average 1.8158649982780393) internal successors, (15818), 8715 states have internal predecessors, (15818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:42,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8716 states to 8716 states and 15818 transitions. [2021-11-03 04:27:42,090 INFO L78 Accepts]: Start accepts. Automaton has 8716 states and 15818 transitions. Word has length 93 [2021-11-03 04:27:42,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:27:42,090 INFO L470 AbstractCegarLoop]: Abstraction has 8716 states and 15818 transitions. [2021-11-03 04:27:42,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:42,091 INFO L276 IsEmpty]: Start isEmpty. Operand 8716 states and 15818 transitions. [2021-11-03 04:27:42,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-03 04:27:42,094 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:27:42,094 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:27:42,120 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-11-03 04:27:42,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:27:42,310 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:27:42,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:27:42,310 INFO L85 PathProgramCache]: Analyzing trace with hash -830657945, now seen corresponding path program 1 times [2021-11-03 04:27:42,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:27:42,311 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1122083285] [2021-11-03 04:27:42,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:27:42,311 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:27:42,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:27:42,312 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:27:42,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-03 04:27:43,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:27:43,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:27:43,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:27:43,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:27:43,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:27:44,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:27:44,238 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:27:44,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1122083285] [2021-11-03 04:27:44,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1122083285] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:27:44,239 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:27:44,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 04:27:44,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510299284] [2021-11-03 04:27:44,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:27:44,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:27:44,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:27:44,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:27:44,241 INFO L87 Difference]: Start difference. First operand 8716 states and 15818 transitions. Second operand has 6 states, 6 states have (on average 28.166666666666668) internal successors, (169), 5 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:48,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:27:48,509 INFO L93 Difference]: Finished difference Result 38677 states and 70629 transitions. [2021-11-03 04:27:48,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 04:27:48,510 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 28.166666666666668) internal successors, (169), 5 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-11-03 04:27:48,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:27:48,561 INFO L225 Difference]: With dead ends: 38677 [2021-11-03 04:27:48,561 INFO L226 Difference]: Without dead ends: 33538 [2021-11-03 04:27:48,572 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-03 04:27:48,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33538 states. [2021-11-03 04:27:49,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33538 to 12726. [2021-11-03 04:27:49,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12726 states, 12721 states have (on average 1.823834604197783) internal successors, (23201), 12725 states have internal predecessors, (23201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:49,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12726 states to 12726 states and 23201 transitions. [2021-11-03 04:27:49,891 INFO L78 Accepts]: Start accepts. Automaton has 12726 states and 23201 transitions. Word has length 95 [2021-11-03 04:27:49,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:27:49,891 INFO L470 AbstractCegarLoop]: Abstraction has 12726 states and 23201 transitions. [2021-11-03 04:27:49,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 28.166666666666668) internal successors, (169), 5 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:49,892 INFO L276 IsEmpty]: Start isEmpty. Operand 12726 states and 23201 transitions. [2021-11-03 04:27:49,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-03 04:27:49,895 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:27:49,895 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:27:49,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-03 04:27:50,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:27:50,107 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:27:50,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:27:50,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1346860968, now seen corresponding path program 1 times [2021-11-03 04:27:50,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:27:50,108 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1951873937] [2021-11-03 04:27:50,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:27:50,109 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:27:50,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:27:50,109 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:27:50,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-03 04:27:51,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:27:51,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:27:51,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:27:51,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:27:51,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:27:51,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:27:51,949 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:27:51,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1951873937] [2021-11-03 04:27:51,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1951873937] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:27:51,949 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:27:51,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 04:27:51,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64922404] [2021-11-03 04:27:51,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:27:51,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:27:51,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:27:51,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:27:51,951 INFO L87 Difference]: Start difference. First operand 12726 states and 23201 transitions. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:53,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:27:53,096 INFO L93 Difference]: Finished difference Result 22007 states and 40010 transitions. [2021-11-03 04:27:53,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:27:53,096 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2021-11-03 04:27:53,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:27:53,113 INFO L225 Difference]: With dead ends: 22007 [2021-11-03 04:27:53,114 INFO L226 Difference]: Without dead ends: 12741 [2021-11-03 04:27:53,123 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:27:53,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12741 states. [2021-11-03 04:27:54,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12741 to 12726. [2021-11-03 04:27:54,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12726 states, 12721 states have (on average 1.8151874852605927) internal successors, (23091), 12725 states have internal predecessors, (23091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:54,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12726 states to 12726 states and 23091 transitions. [2021-11-03 04:27:54,095 INFO L78 Accepts]: Start accepts. Automaton has 12726 states and 23091 transitions. Word has length 102 [2021-11-03 04:27:54,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:27:54,096 INFO L470 AbstractCegarLoop]: Abstraction has 12726 states and 23091 transitions. [2021-11-03 04:27:54,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:54,096 INFO L276 IsEmpty]: Start isEmpty. Operand 12726 states and 23091 transitions. [2021-11-03 04:27:54,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-03 04:27:54,099 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:27:54,099 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:27:54,118 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-03 04:27:54,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:27:54,306 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:27:54,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:27:54,306 INFO L85 PathProgramCache]: Analyzing trace with hash -493659028, now seen corresponding path program 1 times [2021-11-03 04:27:54,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:27:54,307 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1111899518] [2021-11-03 04:27:54,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:27:54,307 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:27:54,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:27:54,309 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:27:54,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-03 04:27:55,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:27:55,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:27:55,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:27:55,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:27:55,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:27:56,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:27:56,339 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:27:56,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1111899518] [2021-11-03 04:27:56,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1111899518] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:27:56,339 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:27:56,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 04:27:56,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4315932] [2021-11-03 04:27:56,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:27:56,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:27:56,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:27:56,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:27:56,341 INFO L87 Difference]: Start difference. First operand 12726 states and 23091 transitions. Second operand has 6 states, 6 states have (on average 31.833333333333332) internal successors, (191), 5 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:59,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:27:59,906 INFO L93 Difference]: Finished difference Result 33483 states and 60646 transitions. [2021-11-03 04:27:59,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 04:27:59,912 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 31.833333333333332) internal successors, (191), 5 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2021-11-03 04:27:59,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:27:59,943 INFO L225 Difference]: With dead ends: 33483 [2021-11-03 04:27:59,943 INFO L226 Difference]: Without dead ends: 24555 [2021-11-03 04:27:59,952 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-03 04:27:59,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24555 states. [2021-11-03 04:28:01,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24555 to 11054. [2021-11-03 04:28:01,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11054 states, 11049 states have (on average 1.8053217485745316) internal successors, (19947), 11053 states have internal predecessors, (19947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:28:01,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11054 states to 11054 states and 19947 transitions. [2021-11-03 04:28:01,139 INFO L78 Accepts]: Start accepts. Automaton has 11054 states and 19947 transitions. Word has length 103 [2021-11-03 04:28:01,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:28:01,139 INFO L470 AbstractCegarLoop]: Abstraction has 11054 states and 19947 transitions. [2021-11-03 04:28:01,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 31.833333333333332) internal successors, (191), 5 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:28:01,140 INFO L276 IsEmpty]: Start isEmpty. Operand 11054 states and 19947 transitions. [2021-11-03 04:28:01,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-03 04:28:01,142 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:28:01,143 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:28:01,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-03 04:28:01,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:28:01,343 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:28:01,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:28:01,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1504776278, now seen corresponding path program 1 times [2021-11-03 04:28:01,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:28:01,345 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1277345655] [2021-11-03 04:28:01,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:28:01,345 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:28:01,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:28:01,347 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:28:01,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-03 04:28:02,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:28:02,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:28:02,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:28:02,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:28:02,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:28:03,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:28:03,344 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:28:03,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1277345655] [2021-11-03 04:28:03,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1277345655] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:28:03,344 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:28:03,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-03 04:28:03,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783516759] [2021-11-03 04:28:03,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 04:28:03,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:28:03,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 04:28:03,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:28:03,346 INFO L87 Difference]: Start difference. First operand 11054 states and 19947 transitions. Second operand has 10 states, 10 states have (on average 19.7) internal successors, (197), 9 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:28:14,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:28:14,678 INFO L93 Difference]: Finished difference Result 69242 states and 123906 transitions. [2021-11-03 04:28:14,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-03 04:28:14,679 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 19.7) internal successors, (197), 9 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2021-11-03 04:28:14,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:28:14,772 INFO L225 Difference]: With dead ends: 69242 [2021-11-03 04:28:14,772 INFO L226 Difference]: Without dead ends: 59849 [2021-11-03 04:28:14,787 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=285, Invalid=905, Unknown=0, NotChecked=0, Total=1190 [2021-11-03 04:28:14,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59849 states. [2021-11-03 04:28:18,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59849 to 24503. [2021-11-03 04:28:18,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24503 states, 24498 states have (on average 1.8007184259939586) internal successors, (44114), 24502 states have internal predecessors, (44114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:28:18,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24503 states to 24503 states and 44114 transitions. [2021-11-03 04:28:18,064 INFO L78 Accepts]: Start accepts. Automaton has 24503 states and 44114 transitions. Word has length 103 [2021-11-03 04:28:18,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:28:18,065 INFO L470 AbstractCegarLoop]: Abstraction has 24503 states and 44114 transitions. [2021-11-03 04:28:18,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 19.7) internal successors, (197), 9 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:28:18,065 INFO L276 IsEmpty]: Start isEmpty. Operand 24503 states and 44114 transitions. [2021-11-03 04:28:18,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-03 04:28:18,067 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:28:18,067 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:28:18,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-03 04:28:18,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:28:18,286 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:28:18,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:28:18,286 INFO L85 PathProgramCache]: Analyzing trace with hash 216566463, now seen corresponding path program 1 times [2021-11-03 04:28:18,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:28:18,287 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [631461845] [2021-11-03 04:28:18,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:28:18,288 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:28:18,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:28:18,289 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:28:18,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-03 04:28:19,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:28:19,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:28:19,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:28:20,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:28:20,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:28:20,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:28:20,347 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:28:20,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [631461845] [2021-11-03 04:28:20,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [631461845] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:28:20,347 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:28:20,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-03 04:28:20,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175744374] [2021-11-03 04:28:20,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:28:20,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:28:20,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:28:20,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:28:20,350 INFO L87 Difference]: Start difference. First operand 24503 states and 44114 transitions. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:28:34,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:28:34,991 INFO L93 Difference]: Finished difference Result 123741 states and 218354 transitions. [2021-11-03 04:28:34,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-03 04:28:34,992 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2021-11-03 04:28:34,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:28:35,338 INFO L225 Difference]: With dead ends: 123741 [2021-11-03 04:28:35,339 INFO L226 Difference]: Without dead ends: 103058 [2021-11-03 04:28:35,366 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-03 04:28:35,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103058 states. [2021-11-03 04:28:39,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103058 to 30252. [2021-11-03 04:28:39,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30252 states, 30247 states have (on average 1.7430488974113134) internal successors, (52722), 30251 states have internal predecessors, (52722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:28:39,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30252 states to 30252 states and 52722 transitions. [2021-11-03 04:28:39,947 INFO L78 Accepts]: Start accepts. Automaton has 30252 states and 52722 transitions. Word has length 104 [2021-11-03 04:28:39,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:28:39,948 INFO L470 AbstractCegarLoop]: Abstraction has 30252 states and 52722 transitions. [2021-11-03 04:28:39,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:28:39,948 INFO L276 IsEmpty]: Start isEmpty. Operand 30252 states and 52722 transitions. [2021-11-03 04:28:39,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-03 04:28:39,951 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:28:39,951 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:28:39,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-03 04:28:40,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:28:40,152 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:28:40,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:28:40,153 INFO L85 PathProgramCache]: Analyzing trace with hash 640213185, now seen corresponding path program 1 times [2021-11-03 04:28:40,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:28:40,153 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [826171321] [2021-11-03 04:28:40,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:28:40,154 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:28:40,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:28:40,155 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:28:40,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2cb5fc0-2619-4724-baf7-429d1fd0bc3e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-03 04:28:41,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:28:41,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:28:41,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:28:42,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:28:42,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:28:42,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:28:42,419 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:28:42,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [826171321] [2021-11-03 04:28:42,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [826171321] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:28:42,420 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:28:42,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 04:28:42,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013168322] [2021-11-03 04:28:42,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:28:42,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:28:42,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:28:42,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:28:42,421 INFO L87 Difference]: Start difference. First operand 30252 states and 52722 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)