./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product18.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_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/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_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product18.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/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_9e70b7ba-403e-49fb-a3e4-b56f042fca49/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 8f67cb4d69b9f8349c20986099ec654a7bad708130567f012247d97f1e51ceb8 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:39:05,948 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:39:05,951 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:39:06,003 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:39:06,004 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:39:06,005 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:39:06,007 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:39:06,010 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:39:06,012 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:39:06,013 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:39:06,014 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:39:06,016 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:39:06,017 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:39:06,018 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:39:06,020 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:39:06,022 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:39:06,023 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:39:06,024 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:39:06,027 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:39:06,030 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:39:06,032 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:39:06,034 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:39:06,036 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:39:06,037 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:39:06,041 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:39:06,042 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:39:06,042 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:39:06,044 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:39:06,044 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:39:06,046 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:39:06,046 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:39:06,048 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:39:06,049 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:39:06,050 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:39:06,051 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:39:06,052 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:39:06,053 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:39:06,053 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:39:06,054 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:39:06,055 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:39:06,056 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:39:06,057 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 04:39:06,081 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:39:06,082 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:39:06,083 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:39:06,084 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:39:06,084 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:39:06,084 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:39:06,085 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 04:39:06,085 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:39:06,086 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:39:06,086 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 04:39:06,086 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 04:39:06,087 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:39:06,087 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 04:39:06,088 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 04:39:06,088 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 04:39:06,089 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:39:06,093 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:39:06,093 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 04:39:06,093 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:39:06,094 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:39:06,094 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 04:39:06,094 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:39:06,095 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 04:39:06,095 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:39:06,095 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:39:06,095 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 04:39:06,096 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:39:06,096 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 04:39:06,096 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:39:06,096 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:39:06,097 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:39:06,097 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:39:06,097 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:39:06,097 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 04:39:06,098 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 04:39:06,098 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 04:39:06,098 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 04:39:06,099 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:39:06,099 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:39:06,099 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_9e70b7ba-403e-49fb-a3e4-b56f042fca49/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8f67cb4d69b9f8349c20986099ec654a7bad708130567f012247d97f1e51ceb8 [2021-11-03 04:39:06,394 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:39:06,428 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:39:06,431 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:39:06,432 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:39:06,433 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:39:06,434 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/product-lines/elevator_spec1_product18.cil.c [2021-11-03 04:39:06,511 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/data/7fe53d6ae/d740001908b645c3b60789187b8e1ae2/FLAG5a2fda610 [2021-11-03 04:39:07,140 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:39:07,140 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/sv-benchmarks/c/product-lines/elevator_spec1_product18.cil.c [2021-11-03 04:39:07,199 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/data/7fe53d6ae/d740001908b645c3b60789187b8e1ae2/FLAG5a2fda610 [2021-11-03 04:39:07,378 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/data/7fe53d6ae/d740001908b645c3b60789187b8e1ae2 [2021-11-03 04:39:07,381 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:39:07,383 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:39:07,384 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:39:07,385 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:39:07,398 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:39:07,399 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:39:07" (1/1) ... [2021-11-03 04:39:07,400 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58877aa1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:39:07, skipping insertion in model container [2021-11-03 04:39:07,401 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:39:07" (1/1) ... [2021-11-03 04:39:07,408 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:39:07,496 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:39:07,705 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_9e70b7ba-403e-49fb-a3e4-b56f042fca49/sv-benchmarks/c/product-lines/elevator_spec1_product18.cil.c[1545,1558] [2021-11-03 04:39:08,126 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:39:08,145 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 04:39:08,145 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@28c3b159 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:39:08, skipping insertion in model container [2021-11-03 04:39:08,146 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:39:08,146 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-03 04:39:08,148 INFO L168 Benchmark]: Toolchain (without parser) took 764.10 ms. Allocated memory was 90.2 MB in the beginning and 119.5 MB in the end (delta: 29.4 MB). Free memory was 50.6 MB in the beginning and 80.4 MB in the end (delta: -29.7 MB). Peak memory consumption was 4.8 MB. Max. memory is 16.1 GB. [2021-11-03 04:39:08,148 INFO L168 Benchmark]: CDTParser took 0.92 ms. Allocated memory is still 90.2 MB. Free memory was 70.1 MB in the beginning and 70.0 MB in the end (delta: 42.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 04:39:08,149 INFO L168 Benchmark]: CACSL2BoogieTranslator took 761.48 ms. Allocated memory was 90.2 MB in the beginning and 119.5 MB in the end (delta: 29.4 MB). Free memory was 50.4 MB in the beginning and 80.7 MB in the end (delta: -30.3 MB). Peak memory consumption was 4.8 MB. Max. memory is 16.1 GB. [2021-11-03 04:39:08,151 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.92 ms. Allocated memory is still 90.2 MB. Free memory was 70.1 MB in the beginning and 70.0 MB in the end (delta: 42.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 761.48 ms. Allocated memory was 90.2 MB in the beginning and 119.5 MB in the end (delta: 29.4 MB). Free memory was 50.4 MB in the beginning and 80.7 MB in the end (delta: -30.3 MB). Peak memory consumption was 4.8 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 759]: 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_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/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_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product18.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/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_9e70b7ba-403e-49fb-a3e4-b56f042fca49/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 8f67cb4d69b9f8349c20986099ec654a7bad708130567f012247d97f1e51ceb8 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:39:10,320 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:39:10,322 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:39:10,379 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:39:10,379 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:39:10,384 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:39:10,386 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:39:10,390 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:39:10,394 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:39:10,405 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:39:10,407 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:39:10,408 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:39:10,408 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:39:10,410 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:39:10,411 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:39:10,413 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:39:10,414 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:39:10,415 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:39:10,417 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:39:10,419 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:39:10,421 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:39:10,423 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:39:10,424 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:39:10,425 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:39:10,429 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:39:10,429 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:39:10,430 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:39:10,431 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:39:10,432 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:39:10,433 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:39:10,433 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:39:10,434 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:39:10,435 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:39:10,436 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:39:10,437 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:39:10,438 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:39:10,438 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:39:10,439 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:39:10,439 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:39:10,440 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:39:10,441 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:39:10,442 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-03 04:39:10,469 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:39:10,470 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:39:10,470 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:39:10,471 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:39:10,471 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:39:10,471 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:39:10,472 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:39:10,472 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:39:10,472 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:39:10,473 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:39:10,473 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:39:10,474 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:39:10,474 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:39:10,474 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 04:39:10,474 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:39:10,475 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 04:39:10,475 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:39:10,475 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 04:39:10,475 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 04:39:10,476 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:39:10,476 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 04:39:10,476 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:39:10,476 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 04:39:10,477 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:39:10,477 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 04:39:10,477 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:39:10,477 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:39:10,478 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:39:10,478 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:39:10,478 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 04:39:10,478 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 04:39:10,479 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 04:39:10,479 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 04:39:10,479 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:39:10,479 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:39:10,480 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_9e70b7ba-403e-49fb-a3e4-b56f042fca49/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8f67cb4d69b9f8349c20986099ec654a7bad708130567f012247d97f1e51ceb8 [2021-11-03 04:39:10,861 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:39:10,882 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:39:10,885 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:39:10,887 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:39:10,887 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:39:10,888 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/product-lines/elevator_spec1_product18.cil.c [2021-11-03 04:39:10,949 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/data/b0f2a40d4/a029ba287ee243549445a22f4549d134/FLAGc8244b445 [2021-11-03 04:39:11,777 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:39:11,777 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/sv-benchmarks/c/product-lines/elevator_spec1_product18.cil.c [2021-11-03 04:39:11,801 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/data/b0f2a40d4/a029ba287ee243549445a22f4549d134/FLAGc8244b445 [2021-11-03 04:39:11,967 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/data/b0f2a40d4/a029ba287ee243549445a22f4549d134 [2021-11-03 04:39:11,970 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:39:11,971 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:39:11,975 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:39:11,975 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:39:11,978 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:39:11,979 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:39:11" (1/1) ... [2021-11-03 04:39:11,980 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4598fe2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:39:11, skipping insertion in model container [2021-11-03 04:39:11,980 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:39:11" (1/1) ... [2021-11-03 04:39:11,989 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:39:12,086 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:39:12,303 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_9e70b7ba-403e-49fb-a3e4-b56f042fca49/sv-benchmarks/c/product-lines/elevator_spec1_product18.cil.c[1545,1558] [2021-11-03 04:39:12,805 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:39:12,824 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-03 04:39:12,850 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:39:12,858 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_9e70b7ba-403e-49fb-a3e4-b56f042fca49/sv-benchmarks/c/product-lines/elevator_spec1_product18.cil.c[1545,1558] [2021-11-03 04:39:12,973 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:39:12,983 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 04:39:12,994 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_9e70b7ba-403e-49fb-a3e4-b56f042fca49/sv-benchmarks/c/product-lines/elevator_spec1_product18.cil.c[1545,1558] [2021-11-03 04:39:13,109 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:39:13,146 INFO L208 MainTranslator]: Completed translation [2021-11-03 04:39:13,146 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:39:13 WrapperNode [2021-11-03 04:39:13,146 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:39:13,147 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 04:39:13,147 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 04:39:13,147 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 04:39:13,155 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:39:13" (1/1) ... [2021-11-03 04:39:13,190 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:39:13" (1/1) ... [2021-11-03 04:39:13,520 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 04:39:13,524 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 04:39:13,525 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 04:39:13,525 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 04:39:13,534 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:39:13" (1/1) ... [2021-11-03 04:39:13,534 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:39:13" (1/1) ... [2021-11-03 04:39:13,605 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:39:13" (1/1) ... [2021-11-03 04:39:13,605 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:39:13" (1/1) ... [2021-11-03 04:39:13,842 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:39:13" (1/1) ... [2021-11-03 04:39:14,027 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:39:13" (1/1) ... [2021-11-03 04:39:14,055 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:39:13" (1/1) ... [2021-11-03 04:39:14,097 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 04:39:14,099 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 04:39:14,099 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 04:39:14,100 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 04:39:14,100 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:39:13" (1/1) ... [2021-11-03 04:39:14,107 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:39:14,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:39:14,151 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 04:39:14,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 04:39:14,281 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 04:39:14,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-03 04:39:14,282 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 04:39:14,282 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 04:39:27,189 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 04:39:27,189 INFO L299 CfgBuilder]: Removed 993 assume(true) statements. [2021-11-03 04:39:27,196 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:39:27 BoogieIcfgContainer [2021-11-03 04:39:27,196 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 04:39:27,198 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 04:39:27,199 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 04:39:27,202 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 04:39:27,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:39:11" (1/3) ... [2021-11-03 04:39:27,203 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b5d0605 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:39:27, skipping insertion in model container [2021-11-03 04:39:27,203 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:39:13" (2/3) ... [2021-11-03 04:39:27,204 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b5d0605 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:39:27, skipping insertion in model container [2021-11-03 04:39:27,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:39:27" (3/3) ... [2021-11-03 04:39:27,205 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product18.cil.c [2021-11-03 04:39:27,211 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 04:39:27,212 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-11-03 04:39:27,293 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 04:39:27,300 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 04:39:27,300 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-03 04:39:27,385 INFO L276 IsEmpty]: Start isEmpty. Operand has 4583 states, 4577 states have (on average 1.8973126502075595) internal successors, (8684), 4582 states have internal predecessors, (8684), 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 04:39:27,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-03 04:39:27,402 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:39:27,403 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] [2021-11-03 04:39:27,404 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 04:39:27,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:39:27,414 INFO L85 PathProgramCache]: Analyzing trace with hash -2055578945, now seen corresponding path program 1 times [2021-11-03 04:39:27,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:39:27,434 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [26948299] [2021-11-03 04:39:27,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:39:27,436 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:39:27,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:39:27,437 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:39:27,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 04:39:27,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:39:27,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-03 04:39:27,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:39:27,956 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 04:39:27,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:39:28,019 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 04:39:28,020 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:39:28,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [26948299] [2021-11-03 04:39:28,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [26948299] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:39:28,021 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:39:28,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 04:39:28,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859839017] [2021-11-03 04:39:28,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-03 04:39:28,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:39:28,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-03 04:39:28,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 04:39:28,056 INFO L87 Difference]: Start difference. First operand has 4583 states, 4577 states have (on average 1.8973126502075595) internal successors, (8684), 4582 states have internal predecessors, (8684), 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 18.0) internal successors, (36), 2 states have internal predecessors, (36), 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 04:39:28,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:39:28,195 INFO L93 Difference]: Finished difference Result 4602 states and 8707 transitions. [2021-11-03 04:39:28,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-03 04:39:28,196 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 18.0) internal successors, (36), 2 states have internal predecessors, (36), 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 36 [2021-11-03 04:39:28,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:39:28,241 INFO L225 Difference]: With dead ends: 4602 [2021-11-03 04:39:28,241 INFO L226 Difference]: Without dead ends: 4579 [2021-11-03 04:39:28,248 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 70 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 04:39:28,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4579 states. [2021-11-03 04:39:28,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4579 to 4579. [2021-11-03 04:39:28,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4579 states, 4574 states have (on average 1.8959335373852209) internal successors, (8672), 4578 states have internal predecessors, (8672), 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 04:39:28,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4579 states to 4579 states and 8672 transitions. [2021-11-03 04:39:28,569 INFO L78 Accepts]: Start accepts. Automaton has 4579 states and 8672 transitions. Word has length 36 [2021-11-03 04:39:28,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:39:28,570 INFO L470 AbstractCegarLoop]: Abstraction has 4579 states and 8672 transitions. [2021-11-03 04:39:28,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 18.0) internal successors, (36), 2 states have internal predecessors, (36), 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 04:39:28,571 INFO L276 IsEmpty]: Start isEmpty. Operand 4579 states and 8672 transitions. [2021-11-03 04:39:28,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-03 04:39:28,580 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:39:28,581 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] [2021-11-03 04:39:28,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-03 04:39:28,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:39:28,799 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 04:39:28,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:39:28,801 INFO L85 PathProgramCache]: Analyzing trace with hash -57168402, now seen corresponding path program 1 times [2021-11-03 04:39:28,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:39:28,802 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1582701911] [2021-11-03 04:39:28,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:39:28,802 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:39:28,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:39:28,804 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:39:28,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 04:39:29,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:39:29,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:39:29,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:39:29,288 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 04:39:29,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:39:29,413 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 04:39:29,413 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:39:29,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1582701911] [2021-11-03 04:39:29,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1582701911] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:39:29,415 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:39:29,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:39:29,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079874006] [2021-11-03 04:39:29,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:39:29,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:39:29,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:39:29,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:39:29,423 INFO L87 Difference]: Start difference. First operand 4579 states and 8672 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 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 04:39:29,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:39:29,930 INFO L93 Difference]: Finished difference Result 13657 states and 25873 transitions. [2021-11-03 04:39:29,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:39:29,931 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 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 38 [2021-11-03 04:39:29,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:39:29,991 INFO L225 Difference]: With dead ends: 13657 [2021-11-03 04:39:29,991 INFO L226 Difference]: Without dead ends: 9091 [2021-11-03 04:39:30,007 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 72 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 04:39:30,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9091 states. [2021-11-03 04:39:30,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9091 to 4579. [2021-11-03 04:39:30,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4579 states, 4574 states have (on average 1.894403148229121) internal successors, (8665), 4578 states have internal predecessors, (8665), 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 04:39:30,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4579 states to 4579 states and 8665 transitions. [2021-11-03 04:39:30,349 INFO L78 Accepts]: Start accepts. Automaton has 4579 states and 8665 transitions. Word has length 38 [2021-11-03 04:39:30,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:39:30,349 INFO L470 AbstractCegarLoop]: Abstraction has 4579 states and 8665 transitions. [2021-11-03 04:39:30,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 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 04:39:30,350 INFO L276 IsEmpty]: Start isEmpty. Operand 4579 states and 8665 transitions. [2021-11-03 04:39:30,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-03 04:39:30,352 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:39:30,352 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] [2021-11-03 04:39:30,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-03 04:39:30,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:39:30,567 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 04:39:30,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:39:30,567 INFO L85 PathProgramCache]: Analyzing trace with hash 21648817, now seen corresponding path program 1 times [2021-11-03 04:39:30,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:39:30,569 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [26334565] [2021-11-03 04:39:30,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:39:30,569 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:39:30,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:39:30,571 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:39:30,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-03 04:39:30,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:39:30,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 04:39:30,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:39:31,090 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 04:39:31,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:39:31,217 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 04:39:31,218 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:39:31,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [26334565] [2021-11-03 04:39:31,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [26334565] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:39:31,218 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:39:31,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 04:39:31,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891931020] [2021-11-03 04:39:31,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:39:31,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:39:31,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:39:31,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:39:31,224 INFO L87 Difference]: Start difference. First operand 4579 states and 8665 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 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 04:39:33,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:39:33,051 INFO L93 Difference]: Finished difference Result 31528 states and 59707 transitions. [2021-11-03 04:39:33,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 04:39:33,052 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 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 44 [2021-11-03 04:39:33,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:39:33,191 INFO L225 Difference]: With dead ends: 31528 [2021-11-03 04:39:33,192 INFO L226 Difference]: Without dead ends: 26971 [2021-11-03 04:39:33,205 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 82 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 04:39:33,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26971 states. [2021-11-03 04:39:33,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26971 to 4557. [2021-11-03 04:39:33,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4557 states, 4552 states have (on average 1.8923550087873462) internal successors, (8614), 4556 states have internal predecessors, (8614), 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 04:39:33,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4557 states to 4557 states and 8614 transitions. [2021-11-03 04:39:33,711 INFO L78 Accepts]: Start accepts. Automaton has 4557 states and 8614 transitions. Word has length 44 [2021-11-03 04:39:33,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:39:33,712 INFO L470 AbstractCegarLoop]: Abstraction has 4557 states and 8614 transitions. [2021-11-03 04:39:33,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 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 04:39:33,713 INFO L276 IsEmpty]: Start isEmpty. Operand 4557 states and 8614 transitions. [2021-11-03 04:39:33,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-03 04:39:33,715 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:39:33,715 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] [2021-11-03 04:39:33,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-03 04:39:33,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:39:33,935 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 04:39:33,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:39:33,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1565983856, now seen corresponding path program 1 times [2021-11-03 04:39:33,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:39:33,937 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [691885420] [2021-11-03 04:39:33,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:39:33,938 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:39:33,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:39:33,939 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:39:33,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-03 04:39:34,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:39:34,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:39:34,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:39:34,469 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 04:39:34,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:39:34,596 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 04:39:34,596 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:39:34,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [691885420] [2021-11-03 04:39:34,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [691885420] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:39:34,597 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:39:34,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:39:34,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085380980] [2021-11-03 04:39:34,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:39:34,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:39:34,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:39:34,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:39:34,598 INFO L87 Difference]: Start difference. First operand 4557 states and 8614 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 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 04:39:35,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:39:35,285 INFO L93 Difference]: Finished difference Result 13568 states and 25677 transitions. [2021-11-03 04:39:35,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:39:35,286 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 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 46 [2021-11-03 04:39:35,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:39:35,313 INFO L225 Difference]: With dead ends: 13568 [2021-11-03 04:39:35,314 INFO L226 Difference]: Without dead ends: 9033 [2021-11-03 04:39:35,322 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 88 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 04:39:35,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9033 states. [2021-11-03 04:39:35,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9033 to 4557. [2021-11-03 04:39:35,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4557 states, 4552 states have (on average 1.8899384885764499) internal successors, (8603), 4556 states have internal predecessors, (8603), 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 04:39:35,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4557 states to 4557 states and 8603 transitions. [2021-11-03 04:39:35,613 INFO L78 Accepts]: Start accepts. Automaton has 4557 states and 8603 transitions. Word has length 46 [2021-11-03 04:39:35,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:39:35,613 INFO L470 AbstractCegarLoop]: Abstraction has 4557 states and 8603 transitions. [2021-11-03 04:39:35,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 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 04:39:35,614 INFO L276 IsEmpty]: Start isEmpty. Operand 4557 states and 8603 transitions. [2021-11-03 04:39:35,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-03 04:39:35,615 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:39:35,616 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] [2021-11-03 04:39:35,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-03 04:39:35,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:39:35,830 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 04:39:35,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:39:35,830 INFO L85 PathProgramCache]: Analyzing trace with hash -487017605, now seen corresponding path program 1 times [2021-11-03 04:39:35,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:39:35,831 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1543230161] [2021-11-03 04:39:35,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:39:35,832 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:39:35,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:39:35,833 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:39:35,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-03 04:39:36,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:39:36,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-03 04:39:36,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:39:36,338 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 04:39:36,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:39:36,521 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 04:39:36,522 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:39:36,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1543230161] [2021-11-03 04:39:36,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1543230161] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:39:36,522 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:39:36,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-03 04:39:36,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420135870] [2021-11-03 04:39:36,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 04:39:36,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:39:36,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 04:39:36,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:39:36,524 INFO L87 Difference]: Start difference. First operand 4557 states and 8603 transitions. Second operand has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 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 04:39:39,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:39:39,741 INFO L93 Difference]: Finished difference Result 49371 states and 93467 transitions. [2021-11-03 04:39:39,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 04:39:39,742 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 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 52 [2021-11-03 04:39:39,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:39:39,894 INFO L225 Difference]: With dead ends: 49371 [2021-11-03 04:39:39,894 INFO L226 Difference]: Without dead ends: 44839 [2021-11-03 04:39:39,915 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 96 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 04:39:39,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44839 states. [2021-11-03 04:39:40,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44839 to 4559. [2021-11-03 04:39:40,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4559 states, 4554 states have (on average 1.888449714536671) internal successors, (8600), 4558 states have internal predecessors, (8600), 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 04:39:40,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4559 states to 4559 states and 8600 transitions. [2021-11-03 04:39:40,589 INFO L78 Accepts]: Start accepts. Automaton has 4559 states and 8600 transitions. Word has length 52 [2021-11-03 04:39:40,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:39:40,590 INFO L470 AbstractCegarLoop]: Abstraction has 4559 states and 8600 transitions. [2021-11-03 04:39:40,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 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 04:39:40,590 INFO L276 IsEmpty]: Start isEmpty. Operand 4559 states and 8600 transitions. [2021-11-03 04:39:40,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-03 04:39:40,593 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:39:40,593 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] [2021-11-03 04:39:40,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-03 04:39:40,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:39:40,794 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 04:39:40,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:39:40,794 INFO L85 PathProgramCache]: Analyzing trace with hash 2009209288, now seen corresponding path program 1 times [2021-11-03 04:39:40,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:39:40,795 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1458770778] [2021-11-03 04:39:40,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:39:40,795 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:39:40,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:39:40,798 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:39:40,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-03 04:39:41,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:39:41,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-03 04:39:41,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:39:41,338 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 04:39:41,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:39:41,512 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 04:39:41,512 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:39:41,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1458770778] [2021-11-03 04:39:41,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1458770778] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:39:41,513 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:39:41,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-03 04:39:41,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791705614] [2021-11-03 04:39:41,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 04:39:41,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:39:41,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 04:39:41,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:39:41,514 INFO L87 Difference]: Start difference. First operand 4559 states and 8600 transitions. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 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 04:39:44,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:39:44,276 INFO L93 Difference]: Finished difference Result 49339 states and 93388 transitions. [2021-11-03 04:39:44,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 04:39:44,277 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 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 54 [2021-11-03 04:39:44,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:39:44,401 INFO L225 Difference]: With dead ends: 49339 [2021-11-03 04:39:44,401 INFO L226 Difference]: Without dead ends: 44807 [2021-11-03 04:39:44,420 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 100 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 04:39:44,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44807 states. [2021-11-03 04:39:45,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44807 to 4563. [2021-11-03 04:39:45,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4563 states, 4558 states have (on average 1.8874506362439667) internal successors, (8603), 4562 states have internal predecessors, (8603), 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 04:39:45,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4563 states to 4563 states and 8603 transitions. [2021-11-03 04:39:45,098 INFO L78 Accepts]: Start accepts. Automaton has 4563 states and 8603 transitions. Word has length 54 [2021-11-03 04:39:45,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:39:45,098 INFO L470 AbstractCegarLoop]: Abstraction has 4563 states and 8603 transitions. [2021-11-03 04:39:45,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 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 04:39:45,099 INFO L276 IsEmpty]: Start isEmpty. Operand 4563 states and 8603 transitions. [2021-11-03 04:39:45,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-03 04:39:45,100 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:39:45,100 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] [2021-11-03 04:39:45,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-03 04:39:45,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:39:45,318 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 04:39:45,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:39:45,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1111183621, now seen corresponding path program 1 times [2021-11-03 04:39:45,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:39:45,320 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [879888469] [2021-11-03 04:39:45,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:39:45,320 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:39:45,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:39:45,322 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:39:45,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-03 04:39:45,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:39:45,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:39:45,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:39:45,897 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 04:39:45,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:39:46,026 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 04:39:46,027 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:39:46,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [879888469] [2021-11-03 04:39:46,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [879888469] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:39:46,027 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:39:46,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:39:46,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014046215] [2021-11-03 04:39:46,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:39:46,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:39:46,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:39:46,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:39:46,029 INFO L87 Difference]: Start difference. First operand 4563 states and 8603 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 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 04:39:46,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:39:46,259 INFO L93 Difference]: Finished difference Result 9074 states and 17137 transitions. [2021-11-03 04:39:46,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:39:46,260 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 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 56 [2021-11-03 04:39:46,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:39:46,271 INFO L225 Difference]: With dead ends: 9074 [2021-11-03 04:39:46,271 INFO L226 Difference]: Without dead ends: 4542 [2021-11-03 04:39:46,278 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 108 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 04:39:46,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4542 states. [2021-11-03 04:39:46,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4542 to 4542. [2021-11-03 04:39:46,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4542 states, 4537 states have (on average 1.8878113290720742) internal successors, (8565), 4541 states have internal predecessors, (8565), 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 04:39:46,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4542 states to 4542 states and 8565 transitions. [2021-11-03 04:39:46,518 INFO L78 Accepts]: Start accepts. Automaton has 4542 states and 8565 transitions. Word has length 56 [2021-11-03 04:39:46,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:39:46,519 INFO L470 AbstractCegarLoop]: Abstraction has 4542 states and 8565 transitions. [2021-11-03 04:39:46,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 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 04:39:46,519 INFO L276 IsEmpty]: Start isEmpty. Operand 4542 states and 8565 transitions. [2021-11-03 04:39:46,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-03 04:39:46,520 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:39:46,521 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] [2021-11-03 04:39:46,541 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-03 04:39:46,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:39:46,734 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 04:39:46,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:39:46,735 INFO L85 PathProgramCache]: Analyzing trace with hash -368223325, now seen corresponding path program 1 times [2021-11-03 04:39:46,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:39:46,735 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1998228873] [2021-11-03 04:39:46,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:39:46,736 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:39:46,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:39:46,737 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:39:46,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-03 04:39:47,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:39:47,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 04:39:47,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:39:47,254 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 04:39:47,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:39:47,390 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 04:39:47,391 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:39:47,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1998228873] [2021-11-03 04:39:47,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1998228873] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:39:47,393 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:39:47,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 04:39:47,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556357703] [2021-11-03 04:39:47,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:39:47,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:39:47,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:39:47,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:39:47,396 INFO L87 Difference]: Start difference. First operand 4542 states and 8565 transitions. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 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 04:39:47,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:39:47,775 INFO L93 Difference]: Finished difference Result 9018 states and 17040 transitions. [2021-11-03 04:39:47,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:39:47,776 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 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 57 [2021-11-03 04:39:47,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:39:47,788 INFO L225 Difference]: With dead ends: 9018 [2021-11-03 04:39:47,789 INFO L226 Difference]: Without dead ends: 4517 [2021-11-03 04:39:47,797 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 108 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 04:39:47,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4517 states. [2021-11-03 04:39:48,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4517 to 4517. [2021-11-03 04:39:48,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4517 states, 4512 states have (on average 1.8885195035460993) internal successors, (8521), 4516 states have internal predecessors, (8521), 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 04:39:48,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4517 states to 4517 states and 8521 transitions. [2021-11-03 04:39:48,035 INFO L78 Accepts]: Start accepts. Automaton has 4517 states and 8521 transitions. Word has length 57 [2021-11-03 04:39:48,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:39:48,036 INFO L470 AbstractCegarLoop]: Abstraction has 4517 states and 8521 transitions. [2021-11-03 04:39:48,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 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 04:39:48,036 INFO L276 IsEmpty]: Start isEmpty. Operand 4517 states and 8521 transitions. [2021-11-03 04:39:48,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-03 04:39:48,037 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:39:48,038 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] [2021-11-03 04:39:48,051 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-11-03 04:39:48,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:39:48,251 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 04:39:48,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:39:48,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1234623212, now seen corresponding path program 1 times [2021-11-03 04:39:48,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:39:48,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1400823421] [2021-11-03 04:39:48,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:39:48,253 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:39:48,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:39:48,254 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:39:48,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-03 04:39:48,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:39:48,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:39:48,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:39:48,853 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 04:39:48,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:39:48,956 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 04:39:48,956 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:39:48,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1400823421] [2021-11-03 04:39:48,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1400823421] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:39:48,957 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:39:48,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:39:48,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738450976] [2021-11-03 04:39:48,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:39:48,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:39:48,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:39:48,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:39:48,959 INFO L87 Difference]: Start difference. First operand 4517 states and 8521 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 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 04:39:49,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:39:49,128 INFO L93 Difference]: Finished difference Result 8993 states and 16996 transitions. [2021-11-03 04:39:49,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:39:49,128 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 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 58 [2021-11-03 04:39:49,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:39:49,140 INFO L225 Difference]: With dead ends: 8993 [2021-11-03 04:39:49,140 INFO L226 Difference]: Without dead ends: 4514 [2021-11-03 04:39:49,147 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 112 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 04:39:49,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4514 states. [2021-11-03 04:39:49,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4514 to 4514. [2021-11-03 04:39:49,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4514 states, 4509 states have (on average 1.8880017742293191) internal successors, (8513), 4513 states have internal predecessors, (8513), 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 04:39:49,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4514 states to 4514 states and 8513 transitions. [2021-11-03 04:39:49,399 INFO L78 Accepts]: Start accepts. Automaton has 4514 states and 8513 transitions. Word has length 58 [2021-11-03 04:39:49,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:39:49,400 INFO L470 AbstractCegarLoop]: Abstraction has 4514 states and 8513 transitions. [2021-11-03 04:39:49,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 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 04:39:49,400 INFO L276 IsEmpty]: Start isEmpty. Operand 4514 states and 8513 transitions. [2021-11-03 04:39:49,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-03 04:39:49,401 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:39:49,401 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] [2021-11-03 04:39:49,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-03 04:39:49,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:39:49,615 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 04:39:49,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:39:49,616 INFO L85 PathProgramCache]: Analyzing trace with hash -244440867, now seen corresponding path program 1 times [2021-11-03 04:39:49,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:39:49,616 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1900743195] [2021-11-03 04:39:49,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:39:49,617 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:39:49,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:39:49,618 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:39:49,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-03 04:39:50,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:39:50,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-03 04:39:50,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:39:50,190 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 04:39:50,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:39:50,317 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 04:39:50,318 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:39:50,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1900743195] [2021-11-03 04:39:50,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1900743195] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:39:50,318 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:39:50,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-03 04:39:50,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639813046] [2021-11-03 04:39:50,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 04:39:50,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:39:50,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 04:39:50,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:39:50,319 INFO L87 Difference]: Start difference. First operand 4514 states and 8513 transitions. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 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 04:39:50,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:39:50,658 INFO L93 Difference]: Finished difference Result 8984 states and 16978 transitions. [2021-11-03 04:39:50,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:39:50,658 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 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 59 [2021-11-03 04:39:50,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:39:50,668 INFO L225 Difference]: With dead ends: 8984 [2021-11-03 04:39:50,668 INFO L226 Difference]: Without dead ends: 4512 [2021-11-03 04:39:50,676 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 110 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 04:39:50,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4512 states. [2021-11-03 04:39:50,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4512 to 4512. [2021-11-03 04:39:50,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4512 states, 4507 states have (on average 1.8875083203905036) internal successors, (8507), 4511 states have internal predecessors, (8507), 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 04:39:51,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4512 states to 4512 states and 8507 transitions. [2021-11-03 04:39:51,008 INFO L78 Accepts]: Start accepts. Automaton has 4512 states and 8507 transitions. Word has length 59 [2021-11-03 04:39:51,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:39:51,010 INFO L470 AbstractCegarLoop]: Abstraction has 4512 states and 8507 transitions. [2021-11-03 04:39:51,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 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 04:39:51,010 INFO L276 IsEmpty]: Start isEmpty. Operand 4512 states and 8507 transitions. [2021-11-03 04:39:51,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-03 04:39:51,011 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:39:51,012 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] [2021-11-03 04:39:51,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-03 04:39:51,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:39:51,225 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 04:39:51,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:39:51,226 INFO L85 PathProgramCache]: Analyzing trace with hash -558837487, now seen corresponding path program 1 times [2021-11-03 04:39:51,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:39:51,226 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [989385261] [2021-11-03 04:39:51,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:39:51,227 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:39:51,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:39:51,227 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:39:51,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-03 04:39:51,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:39:51,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-03 04:39:51,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:39:51,933 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 04:39:51,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:39:52,082 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 04:39:52,083 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:39:52,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [989385261] [2021-11-03 04:39:52,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [989385261] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:39:52,083 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:39:52,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-03 04:39:52,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339625641] [2021-11-03 04:39:52,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 04:39:52,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:39:52,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 04:39:52,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:39:52,085 INFO L87 Difference]: Start difference. First operand 4512 states and 8507 transitions. Second operand has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 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 04:39:52,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:39:52,467 INFO L93 Difference]: Finished difference Result 8977 states and 16963 transitions. [2021-11-03 04:39:52,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:39:52,468 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 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 60 [2021-11-03 04:39:52,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:39:52,472 INFO L225 Difference]: With dead ends: 8977 [2021-11-03 04:39:52,472 INFO L226 Difference]: Without dead ends: 4510 [2021-11-03 04:39:52,477 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 112 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 04:39:52,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4510 states. [2021-11-03 04:39:52,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4510 to 4510. [2021-11-03 04:39:52,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4510 states, 4505 states have (on average 1.8870144284128745) internal successors, (8501), 4509 states have internal predecessors, (8501), 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 04:39:52,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4510 states to 4510 states and 8501 transitions. [2021-11-03 04:39:52,735 INFO L78 Accepts]: Start accepts. Automaton has 4510 states and 8501 transitions. Word has length 60 [2021-11-03 04:39:52,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:39:52,735 INFO L470 AbstractCegarLoop]: Abstraction has 4510 states and 8501 transitions. [2021-11-03 04:39:52,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 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 04:39:52,736 INFO L276 IsEmpty]: Start isEmpty. Operand 4510 states and 8501 transitions. [2021-11-03 04:39:52,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-03 04:39:52,737 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:39:52,737 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 04:39:52,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-03 04:39:52,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:39:52,951 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 04:39:52,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:39:52,952 INFO L85 PathProgramCache]: Analyzing trace with hash 2018540690, now seen corresponding path program 1 times [2021-11-03 04:39:52,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:39:52,952 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1843487456] [2021-11-03 04:39:52,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:39:52,953 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:39:52,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:39:52,953 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:39:52,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-03 04:39:53,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:39:53,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:39:53,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:39:53,883 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 04:39:53,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:39:54,077 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 04:39:54,077 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:39:54,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1843487456] [2021-11-03 04:39:54,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1843487456] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:39:54,077 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:39:54,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-03 04:39:54,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441125464] [2021-11-03 04:39:54,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:39:54,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:39:54,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:39:54,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:39:54,079 INFO L87 Difference]: Start difference. First operand 4510 states and 8501 transitions. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 3 states have internal predecessors, (110), 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 04:39:54,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:39:54,879 INFO L93 Difference]: Finished difference Result 12586 states and 23781 transitions. [2021-11-03 04:39:54,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:39:54,880 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 3 states have internal predecessors, (110), 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 04:39:54,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:39:54,892 INFO L225 Difference]: With dead ends: 12586 [2021-11-03 04:39:54,892 INFO L226 Difference]: Without dead ends: 10299 [2021-11-03 04:39:54,896 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 118 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 04:39:54,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10299 states. [2021-11-03 04:39:55,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10299 to 6070. [2021-11-03 04:39:55,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6070 states, 6065 states have (on average 1.889035449299258) internal successors, (11457), 6069 states have internal predecessors, (11457), 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 04:39:55,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6070 states to 6070 states and 11457 transitions. [2021-11-03 04:39:55,267 INFO L78 Accepts]: Start accepts. Automaton has 6070 states and 11457 transitions. Word has length 61 [2021-11-03 04:39:55,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:39:55,267 INFO L470 AbstractCegarLoop]: Abstraction has 6070 states and 11457 transitions. [2021-11-03 04:39:55,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 3 states have internal predecessors, (110), 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 04:39:55,268 INFO L276 IsEmpty]: Start isEmpty. Operand 6070 states and 11457 transitions. [2021-11-03 04:39:55,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-03 04:39:55,272 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:39:55,272 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 04:39:55,290 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-03 04:39:55,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:39:55,486 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 04:39:55,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:39:55,487 INFO L85 PathProgramCache]: Analyzing trace with hash 582803611, now seen corresponding path program 1 times [2021-11-03 04:39:55,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:39:55,487 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1046116523] [2021-11-03 04:39:55,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:39:55,488 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:39:55,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:39:55,489 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:39:55,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-03 04:39:56,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:39:56,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:39:56,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:39:56,227 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 04:39:56,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:39:56,418 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 04:39:56,418 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:39:56,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1046116523] [2021-11-03 04:39:56,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1046116523] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:39:56,419 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:39:56,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-03 04:39:56,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324311072] [2021-11-03 04:39:56,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 04:39:56,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:39:56,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 04:39:56,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:39:56,421 INFO L87 Difference]: Start difference. First operand 6070 states and 11457 transitions. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 7 states have internal predecessors, (122), 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 04:39:57,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:39:57,184 INFO L93 Difference]: Finished difference Result 11636 states and 21758 transitions. [2021-11-03 04:39:57,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-03 04:39:57,185 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 7 states have internal predecessors, (122), 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 04:39:57,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:39:57,193 INFO L225 Difference]: With dead ends: 11636 [2021-11-03 04:39:57,193 INFO L226 Difference]: Without dead ends: 6721 [2021-11-03 04:39:57,197 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-03 04:39:57,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6721 states. [2021-11-03 04:39:57,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6721 to 4509. [2021-11-03 04:39:57,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4509 states, 4504 states have (on average 1.8792184724689165) internal successors, (8464), 4508 states have internal predecessors, (8464), 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 04:39:57,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4509 states to 4509 states and 8464 transitions. [2021-11-03 04:39:57,509 INFO L78 Accepts]: Start accepts. Automaton has 4509 states and 8464 transitions. Word has length 74 [2021-11-03 04:39:57,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:39:57,510 INFO L470 AbstractCegarLoop]: Abstraction has 4509 states and 8464 transitions. [2021-11-03 04:39:57,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 7 states have internal predecessors, (122), 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 04:39:57,510 INFO L276 IsEmpty]: Start isEmpty. Operand 4509 states and 8464 transitions. [2021-11-03 04:39:57,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-03 04:39:57,513 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:39:57,513 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 04:39:57,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-03 04:39:57,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:39:57,728 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 04:39:57,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:39:57,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1996387262, now seen corresponding path program 1 times [2021-11-03 04:39:57,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:39:57,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [818819849] [2021-11-03 04:39:57,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:39:57,729 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:39:57,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:39:57,730 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:39:57,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-03 04:39:58,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:39:58,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:39:58,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:39:58,528 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 04:39:58,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:39:58,757 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 04:39:58,757 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:39:58,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [818819849] [2021-11-03 04:39:58,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [818819849] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:39:58,758 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:39:58,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 04:39:58,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774581389] [2021-11-03 04:39:58,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:39:58,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:39:58,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:39:58,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:39:58,759 INFO L87 Difference]: Start difference. First operand 4509 states and 8464 transitions. Second operand has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 states have internal predecessors, (75), 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 04:40:01,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:40:01,271 INFO L93 Difference]: Finished difference Result 18072 states and 33925 transitions. [2021-11-03 04:40:01,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:40:01,272 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 states have internal predecessors, (75), 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 04:40:01,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:40:01,290 INFO L225 Difference]: With dead ends: 18072 [2021-11-03 04:40:01,290 INFO L226 Difference]: Without dead ends: 13626 [2021-11-03 04:40:01,297 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 145 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 04:40:01,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13626 states. [2021-11-03 04:40:01,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13626 to 4517. [2021-11-03 04:40:01,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4517 states, 4512 states have (on average 1.877659574468085) internal successors, (8472), 4516 states have internal predecessors, (8472), 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 04:40:01,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4517 states to 4517 states and 8472 transitions. [2021-11-03 04:40:01,651 INFO L78 Accepts]: Start accepts. Automaton has 4517 states and 8472 transitions. Word has length 75 [2021-11-03 04:40:01,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:40:01,651 INFO L470 AbstractCegarLoop]: Abstraction has 4517 states and 8472 transitions. [2021-11-03 04:40:01,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 states have internal predecessors, (75), 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 04:40:01,652 INFO L276 IsEmpty]: Start isEmpty. Operand 4517 states and 8472 transitions. [2021-11-03 04:40:01,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-03 04:40:01,654 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:40:01,655 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 04:40:01,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-03 04:40:01,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:40:01,870 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 04:40:01,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:40:01,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1669216304, now seen corresponding path program 1 times [2021-11-03 04:40:01,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:40:01,871 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1319089965] [2021-11-03 04:40:01,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:40:01,872 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:40:01,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:40:01,873 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:40:01,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-03 04:40:02,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:40:02,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:40:02,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:40:02,701 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 04:40:02,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:40:02,866 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 04:40:02,866 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:40:02,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1319089965] [2021-11-03 04:40:02,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1319089965] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:40:02,867 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:40:02,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 04:40:02,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583486844] [2021-11-03 04:40:02,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:40:02,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:40:02,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:40:02,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:40:02,868 INFO L87 Difference]: Start difference. First operand 4517 states and 8472 transitions. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 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 04:40:10,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:40:10,452 INFO L93 Difference]: Finished difference Result 12669 states and 23738 transitions. [2021-11-03 04:40:10,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:40:10,453 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 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 76 [2021-11-03 04:40:10,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:40:10,463 INFO L225 Difference]: With dead ends: 12669 [2021-11-03 04:40:10,464 INFO L226 Difference]: Without dead ends: 9480 [2021-11-03 04:40:10,468 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:40:10,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9480 states. [2021-11-03 04:40:10,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9480 to 8433. [2021-11-03 04:40:10,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8433 states, 8428 states have (on average 1.8815851922164215) internal successors, (15858), 8432 states have internal predecessors, (15858), 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 04:40:10,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8433 states to 8433 states and 15858 transitions. [2021-11-03 04:40:10,927 INFO L78 Accepts]: Start accepts. Automaton has 8433 states and 15858 transitions. Word has length 76 [2021-11-03 04:40:10,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:40:10,928 INFO L470 AbstractCegarLoop]: Abstraction has 8433 states and 15858 transitions. [2021-11-03 04:40:10,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 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 04:40:10,928 INFO L276 IsEmpty]: Start isEmpty. Operand 8433 states and 15858 transitions. [2021-11-03 04:40:10,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-03 04:40:10,932 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:40:10,932 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 04:40:10,945 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-03 04:40:11,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:40:11,146 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 04:40:11,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:40:11,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1988876260, now seen corresponding path program 1 times [2021-11-03 04:40:11,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:40:11,146 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1952474438] [2021-11-03 04:40:11,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:40:11,147 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:40:11,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:40:11,147 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:40:11,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-03 04:40:11,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:40:11,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:40:11,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:40:12,031 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 04:40:12,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:40:12,225 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 04:40:12,225 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:40:12,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1952474438] [2021-11-03 04:40:12,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1952474438] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:40:12,225 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:40:12,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 04:40:12,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938086167] [2021-11-03 04:40:12,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:40:12,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:40:12,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:40:12,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:40:12,227 INFO L87 Difference]: Start difference. First operand 8433 states and 15858 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 3 states have internal predecessors, (77), 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 04:40:14,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:40:14,204 INFO L93 Difference]: Finished difference Result 16477 states and 30824 transitions. [2021-11-03 04:40:14,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:40:14,205 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 3 states have internal predecessors, (77), 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 04:40:14,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:40:14,214 INFO L225 Difference]: With dead ends: 16477 [2021-11-03 04:40:14,214 INFO L226 Difference]: Without dead ends: 9364 [2021-11-03 04:40:14,221 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 150 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 04:40:14,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9364 states. [2021-11-03 04:40:14,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9364 to 8365. [2021-11-03 04:40:14,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8365 states, 8360 states have (on average 1.8700956937799043) internal successors, (15634), 8364 states have internal predecessors, (15634), 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 04:40:14,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8365 states to 8365 states and 15634 transitions. [2021-11-03 04:40:14,597 INFO L78 Accepts]: Start accepts. Automaton has 8365 states and 15634 transitions. Word has length 77 [2021-11-03 04:40:14,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:40:14,597 INFO L470 AbstractCegarLoop]: Abstraction has 8365 states and 15634 transitions. [2021-11-03 04:40:14,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 3 states have internal predecessors, (77), 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 04:40:14,597 INFO L276 IsEmpty]: Start isEmpty. Operand 8365 states and 15634 transitions. [2021-11-03 04:40:14,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-03 04:40:14,598 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:40:14,599 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 04:40:14,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-03 04:40:14,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:40:14,799 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 04:40:14,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:40:14,800 INFO L85 PathProgramCache]: Analyzing trace with hash -688334952, now seen corresponding path program 1 times [2021-11-03 04:40:14,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:40:14,800 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [435541109] [2021-11-03 04:40:14,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:40:14,801 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:40:14,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:40:14,802 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:40:14,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-03 04:40:15,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:40:15,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:40:15,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:40:15,669 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 04:40:15,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:40:15,910 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 04:40:15,911 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:40:15,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [435541109] [2021-11-03 04:40:15,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [435541109] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:40:15,911 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:40:15,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 04:40:15,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256818188] [2021-11-03 04:40:15,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:40:15,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:40:15,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:40:15,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:40:15,912 INFO L87 Difference]: Start difference. First operand 8365 states and 15634 transitions. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 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 04:40:18,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:40:18,622 INFO L93 Difference]: Finished difference Result 60938 states and 114273 transitions. [2021-11-03 04:40:18,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-03 04:40:18,622 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 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 78 [2021-11-03 04:40:18,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:40:18,684 INFO L225 Difference]: With dead ends: 60938 [2021-11-03 04:40:18,684 INFO L226 Difference]: Without dead ends: 52632 [2021-11-03 04:40:18,701 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 151 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 04:40:18,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52632 states. [2021-11-03 04:40:19,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52632 to 15759. [2021-11-03 04:40:19,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15759 states, 15754 states have (on average 1.8717785959121493) internal successors, (29488), 15758 states have internal predecessors, (29488), 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 04:40:19,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15759 states to 15759 states and 29488 transitions. [2021-11-03 04:40:19,610 INFO L78 Accepts]: Start accepts. Automaton has 15759 states and 29488 transitions. Word has length 78 [2021-11-03 04:40:19,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:40:19,611 INFO L470 AbstractCegarLoop]: Abstraction has 15759 states and 29488 transitions. [2021-11-03 04:40:19,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 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 04:40:19,611 INFO L276 IsEmpty]: Start isEmpty. Operand 15759 states and 29488 transitions. [2021-11-03 04:40:19,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-03 04:40:19,612 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:40:19,612 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 04:40:19,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-03 04:40:19,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:40:19,816 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 04:40:19,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:40:19,816 INFO L85 PathProgramCache]: Analyzing trace with hash -822348458, now seen corresponding path program 1 times [2021-11-03 04:40:19,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:40:19,816 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1060714350] [2021-11-03 04:40:19,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:40:19,817 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:40:19,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:40:19,817 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:40:19,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-03 04:40:20,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:40:20,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:40:20,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:40:20,716 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 04:40:20,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:40:20,916 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 04:40:20,916 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:40:20,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1060714350] [2021-11-03 04:40:20,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1060714350] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:40:20,916 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:40:20,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 04:40:20,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958761767] [2021-11-03 04:40:20,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:40:20,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:40:20,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:40:20,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:40:20,918 INFO L87 Difference]: Start difference. First operand 15759 states and 29488 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 3 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 04:40:23,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:40:23,121 INFO L93 Difference]: Finished difference Result 57236 states and 107363 transitions. [2021-11-03 04:40:23,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:40:23,121 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 3 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 78 [2021-11-03 04:40:23,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:40:23,175 INFO L225 Difference]: With dead ends: 57236 [2021-11-03 04:40:23,175 INFO L226 Difference]: Without dead ends: 45856 [2021-11-03 04:40:23,190 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 152 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 04:40:23,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45856 states. [2021-11-03 04:40:24,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45856 to 26582. [2021-11-03 04:40:24,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26582 states, 26577 states have (on average 1.8741016668547992) internal successors, (49808), 26581 states have internal predecessors, (49808), 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 04:40:24,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26582 states to 26582 states and 49808 transitions. [2021-11-03 04:40:24,798 INFO L78 Accepts]: Start accepts. Automaton has 26582 states and 49808 transitions. Word has length 78 [2021-11-03 04:40:24,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:40:24,798 INFO L470 AbstractCegarLoop]: Abstraction has 26582 states and 49808 transitions. [2021-11-03 04:40:24,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 3 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 04:40:24,798 INFO L276 IsEmpty]: Start isEmpty. Operand 26582 states and 49808 transitions. [2021-11-03 04:40:24,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-03 04:40:24,800 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:40:24,800 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] [2021-11-03 04:40:24,810 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-11-03 04:40:25,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:40:25,001 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 04:40:25,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:40:25,001 INFO L85 PathProgramCache]: Analyzing trace with hash 988763232, now seen corresponding path program 1 times [2021-11-03 04:40:25,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:40:25,002 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1276572098] [2021-11-03 04:40:25,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:40:25,002 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:40:25,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:40:25,002 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:40:25,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-03 04:40:25,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:40:25,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:40:25,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:40:25,956 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 04:40:25,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:40:26,230 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 04:40:26,230 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:40:26,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1276572098] [2021-11-03 04:40:26,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1276572098] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:40:26,231 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:40:26,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 04:40:26,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991069051] [2021-11-03 04:40:26,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:40:26,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:40:26,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:40:26,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:40:26,232 INFO L87 Difference]: Start difference. First operand 26582 states and 49808 transitions. Second operand has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 5 states have internal predecessors, (140), 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 04:40:35,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:40:35,417 INFO L93 Difference]: Finished difference Result 167384 states and 314427 transitions. [2021-11-03 04:40:35,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 04:40:35,418 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 5 states have internal predecessors, (140), 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 80 [2021-11-03 04:40:35,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:40:35,784 INFO L225 Difference]: With dead ends: 167384 [2021-11-03 04:40:35,784 INFO L226 Difference]: Without dead ends: 145181 [2021-11-03 04:40:35,810 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 154 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 04:40:35,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145181 states. [2021-11-03 04:40:39,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145181 to 46056. [2021-11-03 04:40:39,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46056 states, 46051 states have (on average 1.8761807561182167) internal successors, (86400), 46055 states have internal predecessors, (86400), 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 04:40:39,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46056 states to 46056 states and 86400 transitions. [2021-11-03 04:40:39,281 INFO L78 Accepts]: Start accepts. Automaton has 46056 states and 86400 transitions. Word has length 80 [2021-11-03 04:40:39,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:40:39,282 INFO L470 AbstractCegarLoop]: Abstraction has 46056 states and 86400 transitions. [2021-11-03 04:40:39,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 5 states have internal predecessors, (140), 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 04:40:39,282 INFO L276 IsEmpty]: Start isEmpty. Operand 46056 states and 86400 transitions. [2021-11-03 04:40:39,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-03 04:40:39,285 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:40:39,285 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] [2021-11-03 04:40:39,313 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-11-03 04:40:39,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:40:39,500 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 04:40:39,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:40:39,500 INFO L85 PathProgramCache]: Analyzing trace with hash -430971208, now seen corresponding path program 1 times [2021-11-03 04:40:39,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:40:39,501 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [733758658] [2021-11-03 04:40:39,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:40:39,501 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:40:39,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:40:39,502 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:40:39,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-03 04:40:40,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:40:40,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:40:40,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:40:40,451 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 04:40:40,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:40:40,600 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 04:40:40,600 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:40:40,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [733758658] [2021-11-03 04:40:40,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [733758658] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:40:40,600 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:40:40,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:40:40,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145933670] [2021-11-03 04:40:40,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:40:40,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:40:40,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:40:40,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:40:40,601 INFO L87 Difference]: Start difference. First operand 46056 states and 86400 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 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 04:40:43,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:40:43,532 INFO L93 Difference]: Finished difference Result 87865 states and 164842 transitions. [2021-11-03 04:40:43,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:40:43,532 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 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 87 [2021-11-03 04:40:43,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:40:43,583 INFO L225 Difference]: With dead ends: 87865 [2021-11-03 04:40:43,584 INFO L226 Difference]: Without dead ends: 46071 [2021-11-03 04:40:43,604 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 170 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 04:40:43,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46071 states. [2021-11-03 04:40:46,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46071 to 46056. [2021-11-03 04:40:46,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46056 states, 46051 states have (on average 1.870534841805824) internal successors, (86140), 46055 states have internal predecessors, (86140), 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 04:40:46,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46056 states to 46056 states and 86140 transitions. [2021-11-03 04:40:46,560 INFO L78 Accepts]: Start accepts. Automaton has 46056 states and 86140 transitions. Word has length 87 [2021-11-03 04:40:46,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:40:46,560 INFO L470 AbstractCegarLoop]: Abstraction has 46056 states and 86140 transitions. [2021-11-03 04:40:46,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 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 04:40:46,560 INFO L276 IsEmpty]: Start isEmpty. Operand 46056 states and 86140 transitions. [2021-11-03 04:40:46,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-03 04:40:46,563 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:40:46,563 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] [2021-11-03 04:40:46,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-03 04:40:46,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:40:46,778 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 04:40:46,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:40:46,778 INFO L85 PathProgramCache]: Analyzing trace with hash -508682251, now seen corresponding path program 1 times [2021-11-03 04:40:46,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:40:46,779 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1711487610] [2021-11-03 04:40:46,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:40:46,779 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:40:46,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:40:46,781 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:40:46,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e70b7ba-403e-49fb-a3e4-b56f042fca49/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-03 04:40:47,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:40:47,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:40:47,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:40:47,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:40:47,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:40:47,891 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 04:40:47,891 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:40:47,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1711487610] [2021-11-03 04:40:47,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1711487610] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:40:47,892 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:40:47,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:40:47,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846370697] [2021-11-03 04:40:47,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:40:47,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:40:47,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:40:47,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:40:47,893 INFO L87 Difference]: Start difference. First operand 46056 states and 86140 transitions. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 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)