./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec9_product09.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec9_product09.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8 --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 cc5b9f71a5434758faa1f6f3febe6f12c158e9feff610b938ef9d4658acd21ff --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:21:11,025 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:21:11,029 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:21:11,073 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:21:11,074 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:21:11,077 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:21:11,079 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:21:11,083 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:21:11,086 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:21:11,092 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:21:11,093 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:21:11,095 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:21:11,095 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:21:11,098 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:21:11,101 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:21:11,105 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:21:11,107 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:21:11,108 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:21:11,114 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:21:11,121 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:21:11,123 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:21:11,125 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:21:11,128 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:21:11,129 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:21:11,138 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:21:11,139 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:21:11,139 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:21:11,142 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:21:11,142 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:21:11,144 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:21:11,145 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:21:11,146 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:21:11,148 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:21:11,149 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:21:11,151 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:21:11,151 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:21:11,152 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:21:11,153 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:21:11,153 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:21:11,154 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:21:11,155 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:21:11,156 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 02:21:11,208 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:21:11,209 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:21:11,211 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:21:11,211 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:21:11,211 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:21:11,211 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:21:11,212 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:21:11,212 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:21:11,218 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:21:11,218 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:21:11,219 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:21:11,220 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:21:11,220 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:21:11,220 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:21:11,220 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:21:11,221 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:21:11,221 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:21:11,222 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:21:11,222 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:21:11,222 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:21:11,222 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:21:11,223 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:21:11,223 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:21:11,223 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:21:11,223 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:21:11,224 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:21:11,224 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:21:11,224 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:21:11,224 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:21:11,226 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:21:11,226 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:21:11,226 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:21:11,227 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:21:11,227 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:21:11,227 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:21:11,227 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:21:11,228 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:21:11,228 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:21:11,228 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:21:11,228 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_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cc5b9f71a5434758faa1f6f3febe6f12c158e9feff610b938ef9d4658acd21ff [2021-11-07 02:21:11,490 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:21:11,522 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:21:11,523 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:21:11,525 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:21:11,525 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:21:11,526 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec9_product09.cil.c [2021-11-07 02:21:11,591 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/data/9b19b2eca/e31f654351e94d2bb3b5a71eff8e1c48/FLAGd753beb43 [2021-11-07 02:21:12,150 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:21:12,151 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/sv-benchmarks/c/product-lines/elevator_spec9_product09.cil.c [2021-11-07 02:21:12,183 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/data/9b19b2eca/e31f654351e94d2bb3b5a71eff8e1c48/FLAGd753beb43 [2021-11-07 02:21:12,390 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/data/9b19b2eca/e31f654351e94d2bb3b5a71eff8e1c48 [2021-11-07 02:21:12,392 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:21:12,394 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:21:12,399 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:21:12,400 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:21:12,403 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:21:12,404 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:21:12" (1/1) ... [2021-11-07 02:21:12,405 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f9b611f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:21:12, skipping insertion in model container [2021-11-07 02:21:12,408 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:21:12" (1/1) ... [2021-11-07 02:21:12,415 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:21:12,504 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:21:13,077 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_7fc44429-e1ba-47bc-baf8-3decdc405c00/sv-benchmarks/c/product-lines/elevator_spec9_product09.cil.c[70349,70362] [2021-11-07 02:21:13,080 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:21:13,092 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) [2021-11-07 02:21:13,092 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3b7c7b9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:21:13, skipping insertion in model container [2021-11-07 02:21:13,093 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:21:13,093 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 02:21:13,096 INFO L168 Benchmark]: Toolchain (without parser) took 700.56 ms. Allocated memory was 94.4 MB in the beginning and 117.4 MB in the end (delta: 23.1 MB). Free memory was 56.0 MB in the beginning and 79.7 MB in the end (delta: -23.7 MB). Peak memory consumption was 10.6 MB. Max. memory is 16.1 GB. [2021-11-07 02:21:13,096 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 94.4 MB. Free memory was 65.5 MB in the beginning and 65.5 MB in the end (delta: 29.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 02:21:13,097 INFO L168 Benchmark]: CACSL2BoogieTranslator took 693.73 ms. Allocated memory was 94.4 MB in the beginning and 117.4 MB in the end (delta: 23.1 MB). Free memory was 55.8 MB in the beginning and 79.7 MB in the end (delta: -23.9 MB). Peak memory consumption was 8.5 MB. Max. memory is 16.1 GB. [2021-11-07 02:21:13,099 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 94.4 MB. Free memory was 65.5 MB in the beginning and 65.5 MB in the end (delta: 29.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 693.73 ms. Allocated memory was 94.4 MB in the beginning and 117.4 MB in the end (delta: 23.1 MB). Free memory was 55.8 MB in the beginning and 79.7 MB in the end (delta: -23.9 MB). Peak memory consumption was 8.5 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2568]: 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_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec9_product09.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8 --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 cc5b9f71a5434758faa1f6f3febe6f12c158e9feff610b938ef9d4658acd21ff --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:21:15,278 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:21:15,280 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:21:15,333 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:21:15,334 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:21:15,339 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:21:15,341 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:21:15,346 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:21:15,350 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:21:15,360 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:21:15,362 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:21:15,363 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:21:15,364 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:21:15,365 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:21:15,367 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:21:15,368 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:21:15,369 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:21:15,373 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:21:15,376 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:21:15,387 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:21:15,389 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:21:15,391 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:21:15,397 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:21:15,400 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:21:15,404 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:21:15,404 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:21:15,405 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:21:15,407 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:21:15,408 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:21:15,409 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:21:15,410 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:21:15,411 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:21:15,413 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:21:15,414 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:21:15,415 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:21:15,416 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:21:15,425 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:21:15,425 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:21:15,426 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:21:15,428 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:21:15,428 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:21:15,434 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 02:21:15,469 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:21:15,469 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:21:15,470 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:21:15,470 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:21:15,471 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:21:15,471 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:21:15,471 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:21:15,471 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:21:15,471 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:21:15,472 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:21:15,472 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:21:15,472 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:21:15,473 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:21:15,473 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:21:15,473 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:21:15,473 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:21:15,473 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:21:15,474 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 02:21:15,474 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 02:21:15,474 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:21:15,474 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:21:15,474 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:21:15,475 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:21:15,475 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:21:15,475 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 02:21:15,475 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:21:15,475 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:21:15,476 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:21:15,476 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:21:15,476 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:21:15,476 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 02:21:15,476 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 02:21:15,477 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:21:15,477 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:21:15,477 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:21:15,477 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_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cc5b9f71a5434758faa1f6f3febe6f12c158e9feff610b938ef9d4658acd21ff [2021-11-07 02:21:15,857 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:21:15,885 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:21:15,890 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:21:15,891 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:21:15,892 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:21:15,895 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec9_product09.cil.c [2021-11-07 02:21:15,965 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/data/f6e95ca0c/520bb3a6bca745f8983e0f859e24876e/FLAGec7240bfb [2021-11-07 02:21:16,764 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:21:16,764 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/sv-benchmarks/c/product-lines/elevator_spec9_product09.cil.c [2021-11-07 02:21:16,789 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/data/f6e95ca0c/520bb3a6bca745f8983e0f859e24876e/FLAGec7240bfb [2021-11-07 02:21:16,953 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/data/f6e95ca0c/520bb3a6bca745f8983e0f859e24876e [2021-11-07 02:21:16,957 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:21:16,958 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:21:16,966 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:21:16,966 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:21:16,969 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:21:16,970 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:21:16" (1/1) ... [2021-11-07 02:21:16,972 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@297ad715 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:21:16, skipping insertion in model container [2021-11-07 02:21:16,973 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:21:16" (1/1) ... [2021-11-07 02:21:16,980 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:21:17,079 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:21:17,725 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_7fc44429-e1ba-47bc-baf8-3decdc405c00/sv-benchmarks/c/product-lines/elevator_spec9_product09.cil.c[70349,70362] [2021-11-07 02:21:17,728 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:21:17,741 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 02:21:17,756 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:21:17,876 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_7fc44429-e1ba-47bc-baf8-3decdc405c00/sv-benchmarks/c/product-lines/elevator_spec9_product09.cil.c[70349,70362] [2021-11-07 02:21:17,882 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:21:17,895 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:21:18,017 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_7fc44429-e1ba-47bc-baf8-3decdc405c00/sv-benchmarks/c/product-lines/elevator_spec9_product09.cil.c[70349,70362] [2021-11-07 02:21:18,018 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:21:18,084 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:21:18,084 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:21:18 WrapperNode [2021-11-07 02:21:18,084 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:21:18,086 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:21:18,086 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:21:18,086 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:21:18,093 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:21:18" (1/1) ... [2021-11-07 02:21:18,163 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:21:18" (1/1) ... [2021-11-07 02:21:18,366 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:21:18,367 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:21:18,367 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:21:18,367 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:21:18,375 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:21:18" (1/1) ... [2021-11-07 02:21:18,376 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:21:18" (1/1) ... [2021-11-07 02:21:18,387 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:21:18" (1/1) ... [2021-11-07 02:21:18,387 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:21:18" (1/1) ... [2021-11-07 02:21:18,503 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:21:18" (1/1) ... [2021-11-07 02:21:18,551 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:21:18" (1/1) ... [2021-11-07 02:21:18,566 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:21:18" (1/1) ... [2021-11-07 02:21:18,592 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:21:18,594 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:21:18,596 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:21:18,597 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:21:18,598 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:21:18" (1/1) ... [2021-11-07 02:21:18,605 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:21:18,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:21:18,628 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:21:18,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:21:18,677 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:21:18,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 02:21:18,677 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:21:18,678 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:21:27,036 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:21:27,036 INFO L299 CfgBuilder]: Removed 493 assume(true) statements. [2021-11-07 02:21:27,041 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:21:27 BoogieIcfgContainer [2021-11-07 02:21:27,041 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:21:27,043 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:21:27,043 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:21:27,046 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:21:27,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:21:16" (1/3) ... [2021-11-07 02:21:27,047 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bc89243 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:21:27, skipping insertion in model container [2021-11-07 02:21:27,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:21:18" (2/3) ... [2021-11-07 02:21:27,047 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bc89243 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:21:27, skipping insertion in model container [2021-11-07 02:21:27,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:21:27" (3/3) ... [2021-11-07 02:21:27,049 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec9_product09.cil.c [2021-11-07 02:21:27,054 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:21:27,054 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-11-07 02:21:27,112 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:21:27,118 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 [2021-11-07 02:21:27,119 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-07 02:21:27,176 INFO L276 IsEmpty]: Start isEmpty. Operand has 2320 states, 2314 states have (on average 1.904494382022472) internal successors, (4407), 2319 states have internal predecessors, (4407), 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) [2021-11-07 02:21:27,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-07 02:21:27,195 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:21:27,196 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] [2021-11-07 02:21:27,196 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)] === [2021-11-07 02:21:27,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:21:27,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1344261416, now seen corresponding path program 1 times [2021-11-07 02:21:27,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:21:27,216 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2135459195] [2021-11-07 02:21:27,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:21:27,218 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:21:27,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:21:27,221 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:21:27,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 02:21:27,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:21:27,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 02:21:27,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:21:27,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:21:27,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:21:27,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:21:27,853 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:21:27,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2135459195] [2021-11-07 02:21:27,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2135459195] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:21:27,855 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:21:27,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:21:27,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967607958] [2021-11-07 02:21:27,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 02:21:27,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:21:27,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 02:21:27,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:21:27,887 INFO L87 Difference]: Start difference. First operand has 2320 states, 2314 states have (on average 1.904494382022472) internal successors, (4407), 2319 states have internal predecessors, (4407), 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 18.5) internal successors, (37), 2 states have internal predecessors, (37), 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) [2021-11-07 02:21:28,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:21:28,005 INFO L93 Difference]: Finished difference Result 2339 states and 4430 transitions. [2021-11-07 02:21:28,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 02:21:28,023 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 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 37 [2021-11-07 02:21:28,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:21:28,075 INFO L225 Difference]: With dead ends: 2339 [2021-11-07 02:21:28,076 INFO L226 Difference]: Without dead ends: 2316 [2021-11-07 02:21:28,081 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:21:28,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2316 states. [2021-11-07 02:21:28,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2316 to 2316. [2021-11-07 02:21:28,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2316 states, 2311 states have (on average 1.9017741237559498) internal successors, (4395), 2315 states have internal predecessors, (4395), 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) [2021-11-07 02:21:28,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2316 states to 2316 states and 4395 transitions. [2021-11-07 02:21:28,262 INFO L78 Accepts]: Start accepts. Automaton has 2316 states and 4395 transitions. Word has length 37 [2021-11-07 02:21:28,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:21:28,263 INFO L470 AbstractCegarLoop]: Abstraction has 2316 states and 4395 transitions. [2021-11-07 02:21:28,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 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) [2021-11-07 02:21:28,263 INFO L276 IsEmpty]: Start isEmpty. Operand 2316 states and 4395 transitions. [2021-11-07 02:21:28,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-07 02:21:28,274 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:21:28,275 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] [2021-11-07 02:21:28,296 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-07 02:21:28,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:21:28,488 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)] === [2021-11-07 02:21:28,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:21:28,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1119069577, now seen corresponding path program 1 times [2021-11-07 02:21:28,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:21:28,490 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1895631528] [2021-11-07 02:21:28,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:21:28,490 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:21:28,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:21:28,492 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:21:28,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 02:21:28,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:21:28,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:21:28,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:21:28,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:21:28,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:21:29,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:21:29,030 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:21:29,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1895631528] [2021-11-07 02:21:29,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1895631528] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:21:29,031 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:21:29,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:21:29,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547952138] [2021-11-07 02:21:29,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:21:29,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:21:29,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:21:29,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:21:29,040 INFO L87 Difference]: Start difference. First operand 2316 states and 4395 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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) [2021-11-07 02:21:29,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:21:29,208 INFO L93 Difference]: Finished difference Result 4619 states and 8771 transitions. [2021-11-07 02:21:29,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:21:29,209 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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 39 [2021-11-07 02:21:29,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:21:29,226 INFO L225 Difference]: With dead ends: 4619 [2021-11-07 02:21:29,227 INFO L226 Difference]: Without dead ends: 2316 [2021-11-07 02:21:29,235 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:21:29,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2316 states. [2021-11-07 02:21:29,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2316 to 2316. [2021-11-07 02:21:29,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2316 states, 2311 states have (on average 1.8991778450887062) internal successors, (4389), 2315 states have internal predecessors, (4389), 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) [2021-11-07 02:21:29,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2316 states to 2316 states and 4389 transitions. [2021-11-07 02:21:29,317 INFO L78 Accepts]: Start accepts. Automaton has 2316 states and 4389 transitions. Word has length 39 [2021-11-07 02:21:29,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:21:29,319 INFO L470 AbstractCegarLoop]: Abstraction has 2316 states and 4389 transitions. [2021-11-07 02:21:29,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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) [2021-11-07 02:21:29,320 INFO L276 IsEmpty]: Start isEmpty. Operand 2316 states and 4389 transitions. [2021-11-07 02:21:29,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 02:21:29,325 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:21:29,332 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] [2021-11-07 02:21:29,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 02:21:29,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:21:29,551 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)] === [2021-11-07 02:21:29,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:21:29,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1891407277, now seen corresponding path program 1 times [2021-11-07 02:21:29,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:21:29,552 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [316675736] [2021-11-07 02:21:29,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:21:29,553 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:21:29,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:21:29,554 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:21:29,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 02:21:29,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:21:29,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:21:29,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:21:30,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:21:30,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:21:30,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:21:30,208 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:21:30,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [316675736] [2021-11-07 02:21:30,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [316675736] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:21:30,208 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:21:30,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:21:30,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024503644] [2021-11-07 02:21:30,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:21:30,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:21:30,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:21:30,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:21:30,210 INFO L87 Difference]: Start difference. First operand 2316 states and 4389 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) [2021-11-07 02:21:30,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:21:30,391 INFO L93 Difference]: Finished difference Result 4583 states and 8694 transitions. [2021-11-07 02:21:30,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:21:30,392 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 [2021-11-07 02:21:30,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:21:30,407 INFO L225 Difference]: With dead ends: 4583 [2021-11-07 02:21:30,408 INFO L226 Difference]: Without dead ends: 2289 [2021-11-07 02:21:30,411 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:21:30,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2289 states. [2021-11-07 02:21:30,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2289 to 2289. [2021-11-07 02:21:30,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2289 states, 2284 states have (on average 1.8971103327495622) internal successors, (4333), 2288 states have internal predecessors, (4333), 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) [2021-11-07 02:21:30,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2289 states to 2289 states and 4333 transitions. [2021-11-07 02:21:30,527 INFO L78 Accepts]: Start accepts. Automaton has 2289 states and 4333 transitions. Word has length 44 [2021-11-07 02:21:30,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:21:30,528 INFO L470 AbstractCegarLoop]: Abstraction has 2289 states and 4333 transitions. [2021-11-07 02:21:30,528 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) [2021-11-07 02:21:30,528 INFO L276 IsEmpty]: Start isEmpty. Operand 2289 states and 4333 transitions. [2021-11-07 02:21:30,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-07 02:21:30,531 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:21:30,531 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] [2021-11-07 02:21:30,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 02:21:30,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:21:30,745 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)] === [2021-11-07 02:21:30,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:21:30,745 INFO L85 PathProgramCache]: Analyzing trace with hash -291718581, now seen corresponding path program 1 times [2021-11-07 02:21:30,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:21:30,747 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [745713943] [2021-11-07 02:21:30,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:21:30,747 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:21:30,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:21:30,750 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:21:30,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 02:21:31,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:21:31,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:21:31,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:21:31,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:21:31,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:21:31,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:21:31,464 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:21:31,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [745713943] [2021-11-07 02:21:31,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [745713943] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:21:31,466 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:21:31,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:21:31,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747833962] [2021-11-07 02:21:31,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:21:31,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:21:31,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:21:31,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:21:31,469 INFO L87 Difference]: Start difference. First operand 2289 states and 4333 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 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) [2021-11-07 02:21:31,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:21:31,631 INFO L93 Difference]: Finished difference Result 4556 states and 8638 transitions. [2021-11-07 02:21:31,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:21:31,632 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 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 45 [2021-11-07 02:21:31,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:21:31,647 INFO L225 Difference]: With dead ends: 4556 [2021-11-07 02:21:31,647 INFO L226 Difference]: Without dead ends: 2289 [2021-11-07 02:21:31,651 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:21:31,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2289 states. [2021-11-07 02:21:31,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2289 to 2289. [2021-11-07 02:21:31,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2289 states, 2284 states have (on average 1.8944833625218913) internal successors, (4327), 2288 states have internal predecessors, (4327), 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) [2021-11-07 02:21:31,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2289 states to 2289 states and 4327 transitions. [2021-11-07 02:21:31,744 INFO L78 Accepts]: Start accepts. Automaton has 2289 states and 4327 transitions. Word has length 45 [2021-11-07 02:21:31,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:21:31,744 INFO L470 AbstractCegarLoop]: Abstraction has 2289 states and 4327 transitions. [2021-11-07 02:21:31,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 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) [2021-11-07 02:21:31,745 INFO L276 IsEmpty]: Start isEmpty. Operand 2289 states and 4327 transitions. [2021-11-07 02:21:31,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-07 02:21:31,747 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:21:31,747 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] [2021-11-07 02:21:31,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 02:21:31,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:21:31,960 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)] === [2021-11-07 02:21:31,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:21:31,961 INFO L85 PathProgramCache]: Analyzing trace with hash -233795494, now seen corresponding path program 1 times [2021-11-07 02:21:31,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:21:31,962 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [844984168] [2021-11-07 02:21:31,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:21:31,963 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:21:31,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:21:31,964 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:21:31,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 02:21:32,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:21:32,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:21:32,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:21:32,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:21:32,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:21:32,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:21:32,651 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:21:32,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [844984168] [2021-11-07 02:21:32,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [844984168] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:21:32,651 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:21:32,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 02:21:32,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510435342] [2021-11-07 02:21:32,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:21:32,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:21:32,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:21:32,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:21:32,653 INFO L87 Difference]: Start difference. First operand 2289 states and 4327 transitions. Second operand has 8 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 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) [2021-11-07 02:21:32,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:21:32,863 INFO L93 Difference]: Finished difference Result 4550 states and 8621 transitions. [2021-11-07 02:21:32,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:21:32,864 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 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 50 [2021-11-07 02:21:32,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:21:32,880 INFO L225 Difference]: With dead ends: 4550 [2021-11-07 02:21:32,881 INFO L226 Difference]: Without dead ends: 2286 [2021-11-07 02:21:32,885 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:21:32,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2286 states. [2021-11-07 02:21:32,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2286 to 2286. [2021-11-07 02:21:32,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2286 states, 2281 states have (on average 1.893467777290662) internal successors, (4319), 2285 states have internal predecessors, (4319), 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) [2021-11-07 02:21:32,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2286 states to 2286 states and 4319 transitions. [2021-11-07 02:21:32,991 INFO L78 Accepts]: Start accepts. Automaton has 2286 states and 4319 transitions. Word has length 50 [2021-11-07 02:21:32,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:21:32,992 INFO L470 AbstractCegarLoop]: Abstraction has 2286 states and 4319 transitions. [2021-11-07 02:21:32,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 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) [2021-11-07 02:21:32,992 INFO L276 IsEmpty]: Start isEmpty. Operand 2286 states and 4319 transitions. [2021-11-07 02:21:32,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-07 02:21:32,995 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:21:32,996 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] [2021-11-07 02:21:33,013 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 02:21:33,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:21:33,210 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)] === [2021-11-07 02:21:33,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:21:33,210 INFO L85 PathProgramCache]: Analyzing trace with hash 970953866, now seen corresponding path program 1 times [2021-11-07 02:21:33,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:21:33,212 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1482862321] [2021-11-07 02:21:33,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:21:33,213 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:21:33,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:21:33,216 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:21:33,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 02:21:33,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:21:33,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:21:33,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:21:33,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:21:33,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:21:34,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:21:34,055 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:21:34,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1482862321] [2021-11-07 02:21:34,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1482862321] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:21:34,056 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:21:34,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 02:21:34,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649506392] [2021-11-07 02:21:34,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:21:34,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:21:34,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:21:34,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:21:34,057 INFO L87 Difference]: Start difference. First operand 2286 states and 4319 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 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) [2021-11-07 02:21:35,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:21:35,917 INFO L93 Difference]: Finished difference Result 9200 states and 17379 transitions. [2021-11-07 02:21:35,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 02:21:35,918 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 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 51 [2021-11-07 02:21:35,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:21:35,964 INFO L225 Difference]: With dead ends: 9200 [2021-11-07 02:21:35,964 INFO L226 Difference]: Without dead ends: 6954 [2021-11-07 02:21:35,969 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:21:35,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6954 states. [2021-11-07 02:21:36,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6954 to 2290. [2021-11-07 02:21:36,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2290 states, 2285 states have (on average 1.8919037199124726) internal successors, (4323), 2289 states have internal predecessors, (4323), 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) [2021-11-07 02:21:36,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2290 states to 2290 states and 4323 transitions. [2021-11-07 02:21:36,186 INFO L78 Accepts]: Start accepts. Automaton has 2290 states and 4323 transitions. Word has length 51 [2021-11-07 02:21:36,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:21:36,186 INFO L470 AbstractCegarLoop]: Abstraction has 2290 states and 4323 transitions. [2021-11-07 02:21:36,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 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) [2021-11-07 02:21:36,187 INFO L276 IsEmpty]: Start isEmpty. Operand 2290 states and 4323 transitions. [2021-11-07 02:21:36,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 02:21:36,189 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:21:36,189 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] [2021-11-07 02:21:36,205 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 02:21:36,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:21:36,398 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)] === [2021-11-07 02:21:36,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:21:36,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1787389742, now seen corresponding path program 1 times [2021-11-07 02:21:36,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:21:36,399 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [251383925] [2021-11-07 02:21:36,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:21:36,399 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:21:36,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:21:36,403 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:21:36,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 02:21:36,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:21:36,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:21:36,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:21:37,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:21:37,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:21:37,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:21:37,141 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:21:37,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [251383925] [2021-11-07 02:21:37,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [251383925] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:21:37,141 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:21:37,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 02:21:37,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635319760] [2021-11-07 02:21:37,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:21:37,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:21:37,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:21:37,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:21:37,143 INFO L87 Difference]: Start difference. First operand 2290 states and 4323 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 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) [2021-11-07 02:21:43,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:21:43,816 INFO L93 Difference]: Finished difference Result 6249 states and 11752 transitions. [2021-11-07 02:21:43,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 02:21:43,816 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 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 [2021-11-07 02:21:43,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:21:43,862 INFO L225 Difference]: With dead ends: 6249 [2021-11-07 02:21:43,862 INFO L226 Difference]: Without dead ends: 4915 [2021-11-07 02:21:43,866 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:21:43,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4915 states. [2021-11-07 02:21:44,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4915 to 4224. [2021-11-07 02:21:44,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4224 states, 4219 states have (on average 1.8954728608675042) internal successors, (7997), 4223 states have internal predecessors, (7997), 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) [2021-11-07 02:21:44,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4224 states to 4224 states and 7997 transitions. [2021-11-07 02:21:44,144 INFO L78 Accepts]: Start accepts. Automaton has 4224 states and 7997 transitions. Word has length 52 [2021-11-07 02:21:44,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:21:44,146 INFO L470 AbstractCegarLoop]: Abstraction has 4224 states and 7997 transitions. [2021-11-07 02:21:44,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 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) [2021-11-07 02:21:44,147 INFO L276 IsEmpty]: Start isEmpty. Operand 4224 states and 7997 transitions. [2021-11-07 02:21:44,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-07 02:21:44,150 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:21:44,150 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:21:44,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 02:21:44,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:21:44,364 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)] === [2021-11-07 02:21:44,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:21:44,364 INFO L85 PathProgramCache]: Analyzing trace with hash 536310902, now seen corresponding path program 1 times [2021-11-07 02:21:44,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:21:44,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [646583523] [2021-11-07 02:21:44,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:21:44,366 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:21:44,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:21:44,367 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:21:44,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 02:21:44,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:21:44,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:21:44,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:21:45,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:21:45,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:21:45,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:21:45,232 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:21:45,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [646583523] [2021-11-07 02:21:45,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [646583523] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:21:45,236 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:21:45,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:21:45,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85288726] [2021-11-07 02:21:45,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:21:45,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:21:45,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:21:45,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:21:45,238 INFO L87 Difference]: Start difference. First operand 4224 states and 7997 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:46,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:21:46,921 INFO L93 Difference]: Finished difference Result 7952 states and 14955 transitions. [2021-11-07 02:21:46,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:21:46,921 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-07 02:21:46,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:21:46,933 INFO L225 Difference]: With dead ends: 7952 [2021-11-07 02:21:46,934 INFO L226 Difference]: Without dead ends: 4676 [2021-11-07 02:21:46,938 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:21:46,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4676 states. [2021-11-07 02:21:47,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4676 to 4127. [2021-11-07 02:21:47,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4127 states, 4122 states have (on average 1.8791848617176128) internal successors, (7746), 4126 states have internal predecessors, (7746), 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) [2021-11-07 02:21:47,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4127 states to 4127 states and 7746 transitions. [2021-11-07 02:21:47,126 INFO L78 Accepts]: Start accepts. Automaton has 4127 states and 7746 transitions. Word has length 53 [2021-11-07 02:21:47,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:21:47,127 INFO L470 AbstractCegarLoop]: Abstraction has 4127 states and 7746 transitions. [2021-11-07 02:21:47,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:47,127 INFO L276 IsEmpty]: Start isEmpty. Operand 4127 states and 7746 transitions. [2021-11-07 02:21:47,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-07 02:21:47,129 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:21:47,129 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] [2021-11-07 02:21:47,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 02:21:47,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:21:47,343 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)] === [2021-11-07 02:21:47,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:21:47,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1267828138, now seen corresponding path program 1 times [2021-11-07 02:21:47,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:21:47,344 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1981376751] [2021-11-07 02:21:47,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:21:47,344 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:21:47,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:21:47,345 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:21:47,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 02:21:47,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:21:47,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:21:47,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:21:47,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:21:47,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:21:48,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:21:48,143 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:21:48,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1981376751] [2021-11-07 02:21:48,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1981376751] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:21:48,143 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:21:48,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 02:21:48,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5758808] [2021-11-07 02:21:48,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:21:48,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:21:48,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:21:48,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:21:48,145 INFO L87 Difference]: Start difference. First operand 4127 states and 7746 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 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) [2021-11-07 02:21:49,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:21:49,107 INFO L93 Difference]: Finished difference Result 29413 states and 55432 transitions. [2021-11-07 02:21:49,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 02:21:49,107 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 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 [2021-11-07 02:21:49,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:21:49,177 INFO L225 Difference]: With dead ends: 29413 [2021-11-07 02:21:49,177 INFO L226 Difference]: Without dead ends: 25322 [2021-11-07 02:21:49,187 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:21:49,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25322 states. [2021-11-07 02:21:49,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25322 to 7721. [2021-11-07 02:21:49,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7721 states, 7716 states have (on average 1.8838776568170037) internal successors, (14536), 7720 states have internal predecessors, (14536), 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) [2021-11-07 02:21:49,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7721 states to 7721 states and 14536 transitions. [2021-11-07 02:21:49,702 INFO L78 Accepts]: Start accepts. Automaton has 7721 states and 14536 transitions. Word has length 54 [2021-11-07 02:21:49,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:21:49,703 INFO L470 AbstractCegarLoop]: Abstraction has 7721 states and 14536 transitions. [2021-11-07 02:21:49,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 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) [2021-11-07 02:21:49,703 INFO L276 IsEmpty]: Start isEmpty. Operand 7721 states and 14536 transitions. [2021-11-07 02:21:49,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-07 02:21:49,705 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:21:49,705 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] [2021-11-07 02:21:49,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 02:21:49,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:21:49,919 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)] === [2021-11-07 02:21:49,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:21:49,919 INFO L85 PathProgramCache]: Analyzing trace with hash -537610196, now seen corresponding path program 1 times [2021-11-07 02:21:49,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:21:49,920 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [260259126] [2021-11-07 02:21:49,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:21:49,920 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:21:49,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:21:49,921 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:21:49,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 02:21:50,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:21:50,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:21:50,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:21:50,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:21:50,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:21:50,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:21:50,724 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:21:50,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [260259126] [2021-11-07 02:21:50,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [260259126] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:21:50,724 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:21:50,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:21:50,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235008374] [2021-11-07 02:21:50,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:21:50,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:21:50,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:21:50,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:21:50,726 INFO L87 Difference]: Start difference. First operand 7721 states and 14536 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 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) [2021-11-07 02:21:51,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:21:51,580 INFO L93 Difference]: Finished difference Result 23394 states and 44090 transitions. [2021-11-07 02:21:51,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:21:51,582 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 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 [2021-11-07 02:21:51,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:21:51,635 INFO L225 Difference]: With dead ends: 23394 [2021-11-07 02:21:51,635 INFO L226 Difference]: Without dead ends: 18958 [2021-11-07 02:21:51,692 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:21:51,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18958 states. [2021-11-07 02:21:52,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18958 to 11888. [2021-11-07 02:21:52,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11888 states, 11883 states have (on average 1.884288479340234) internal successors, (22391), 11887 states have internal predecessors, (22391), 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) [2021-11-07 02:21:52,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11888 states to 11888 states and 22391 transitions. [2021-11-07 02:21:52,345 INFO L78 Accepts]: Start accepts. Automaton has 11888 states and 22391 transitions. Word has length 54 [2021-11-07 02:21:52,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:21:52,345 INFO L470 AbstractCegarLoop]: Abstraction has 11888 states and 22391 transitions. [2021-11-07 02:21:52,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 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) [2021-11-07 02:21:52,345 INFO L276 IsEmpty]: Start isEmpty. Operand 11888 states and 22391 transitions. [2021-11-07 02:21:52,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-07 02:21:52,347 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:21:52,347 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] [2021-11-07 02:21:52,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 02:21:52,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:21:52,561 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)] === [2021-11-07 02:21:52,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:21:52,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1360911902, now seen corresponding path program 1 times [2021-11-07 02:21:52,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:21:52,563 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1225966474] [2021-11-07 02:21:52,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:21:52,563 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:21:52,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:21:52,564 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:21:52,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 02:21:53,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:21:53,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:21:53,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:21:53,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:21:53,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:21:53,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:21:53,424 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:21:53,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1225966474] [2021-11-07 02:21:53,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1225966474] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:21:53,424 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:21:53,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 02:21:53,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58807889] [2021-11-07 02:21:53,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:21:53,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:21:53,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:21:53,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:21:53,426 INFO L87 Difference]: Start difference. First operand 11888 states and 22391 transitions. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:56,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:21:56,177 INFO L93 Difference]: Finished difference Result 64132 states and 121133 transitions. [2021-11-07 02:21:56,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 02:21:56,178 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-07 02:21:56,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:21:56,290 INFO L225 Difference]: With dead ends: 64132 [2021-11-07 02:21:56,290 INFO L226 Difference]: Without dead ends: 55529 [2021-11-07 02:21:56,309 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-07 02:21:56,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55529 states. [2021-11-07 02:21:57,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55529 to 19000. [2021-11-07 02:21:57,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19000 states, 18995 states have (on average 1.8869176098973415) internal successors, (35842), 18999 states have internal predecessors, (35842), 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) [2021-11-07 02:21:57,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19000 states to 19000 states and 35842 transitions. [2021-11-07 02:21:57,588 INFO L78 Accepts]: Start accepts. Automaton has 19000 states and 35842 transitions. Word has length 56 [2021-11-07 02:21:57,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:21:57,588 INFO L470 AbstractCegarLoop]: Abstraction has 19000 states and 35842 transitions. [2021-11-07 02:21:57,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:57,589 INFO L276 IsEmpty]: Start isEmpty. Operand 19000 states and 35842 transitions. [2021-11-07 02:21:57,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 02:21:57,591 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:21:57,591 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:21:57,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 02:21:57,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:21:57,806 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)] === [2021-11-07 02:21:57,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:21:57,806 INFO L85 PathProgramCache]: Analyzing trace with hash 2101830717, now seen corresponding path program 1 times [2021-11-07 02:21:57,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:21:57,807 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [858429621] [2021-11-07 02:21:57,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:21:57,807 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:21:57,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:21:57,808 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:21:57,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 02:21:58,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:21:58,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:21:58,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:21:58,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:21:58,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:21:58,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:21:58,566 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:21:58,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [858429621] [2021-11-07 02:21:58,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [858429621] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:21:58,567 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:21:58,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:21:58,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636276515] [2021-11-07 02:21:58,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:21:58,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:21:58,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:21:58,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:21:58,568 INFO L87 Difference]: Start difference. First operand 19000 states and 35842 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 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) [2021-11-07 02:22:00,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:22:00,183 INFO L93 Difference]: Finished difference Result 45986 states and 86413 transitions. [2021-11-07 02:22:00,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:22:00,184 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-07 02:22:00,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:22:00,236 INFO L225 Difference]: With dead ends: 45986 [2021-11-07 02:22:00,237 INFO L226 Difference]: Without dead ends: 28413 [2021-11-07 02:22:00,258 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:22:00,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28413 states. [2021-11-07 02:22:01,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28413 to 18877. [2021-11-07 02:22:01,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18877 states, 18872 states have (on average 1.8754239084357778) internal successors, (35393), 18876 states have internal predecessors, (35393), 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) [2021-11-07 02:22:01,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18877 states to 18877 states and 35393 transitions. [2021-11-07 02:22:01,305 INFO L78 Accepts]: Start accepts. Automaton has 18877 states and 35393 transitions. Word has length 63 [2021-11-07 02:22:01,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:22:01,306 INFO L470 AbstractCegarLoop]: Abstraction has 18877 states and 35393 transitions. [2021-11-07 02:22:01,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 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) [2021-11-07 02:22:01,306 INFO L276 IsEmpty]: Start isEmpty. Operand 18877 states and 35393 transitions. [2021-11-07 02:22:01,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 02:22:01,308 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:22:01,309 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:22:01,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 02:22:01,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:22:01,527 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)] === [2021-11-07 02:22:01,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:22:01,527 INFO L85 PathProgramCache]: Analyzing trace with hash -943703782, now seen corresponding path program 1 times [2021-11-07 02:22:01,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:22:01,528 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [691760668] [2021-11-07 02:22:01,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:01,528 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:22:01,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:22:01,529 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:22:01,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 02:22:02,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:02,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:22:02,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:02,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:02,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:02,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:02,297 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:22:02,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [691760668] [2021-11-07 02:22:02,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [691760668] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:22:02,298 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:22:02,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:22:02,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706965068] [2021-11-07 02:22:02,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:22:02,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:22:02,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:22:02,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:22:02,300 INFO L87 Difference]: Start difference. First operand 18877 states and 35393 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 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) [2021-11-07 02:22:03,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:22:03,042 INFO L93 Difference]: Finished difference Result 34613 states and 64835 transitions. [2021-11-07 02:22:03,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:22:03,042 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-07 02:22:03,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:22:03,063 INFO L225 Difference]: With dead ends: 34613 [2021-11-07 02:22:03,063 INFO L226 Difference]: Without dead ends: 18892 [2021-11-07 02:22:03,077 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:22:03,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18892 states. [2021-11-07 02:22:03,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18892 to 18877. [2021-11-07 02:22:03,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18877 states, 18872 states have (on average 1.8678995337007207) internal successors, (35251), 18876 states have internal predecessors, (35251), 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) [2021-11-07 02:22:03,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18877 states to 18877 states and 35251 transitions. [2021-11-07 02:22:03,819 INFO L78 Accepts]: Start accepts. Automaton has 18877 states and 35251 transitions. Word has length 63 [2021-11-07 02:22:03,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:22:03,819 INFO L470 AbstractCegarLoop]: Abstraction has 18877 states and 35251 transitions. [2021-11-07 02:22:03,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 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) [2021-11-07 02:22:03,820 INFO L276 IsEmpty]: Start isEmpty. Operand 18877 states and 35251 transitions. [2021-11-07 02:22:03,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 02:22:03,822 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:22:03,822 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] [2021-11-07 02:22:03,842 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 02:22:04,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:22:04,037 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)] === [2021-11-07 02:22:04,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:22:04,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1812786343, now seen corresponding path program 1 times [2021-11-07 02:22:04,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:22:04,038 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [176631003] [2021-11-07 02:22:04,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:04,038 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:22:04,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:22:04,039 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:22:04,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 02:22:04,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:04,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:22:04,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:04,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:04,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:05,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:05,037 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:22:05,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [176631003] [2021-11-07 02:22:05,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [176631003] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:22:05,037 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:22:05,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 02:22:05,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188962954] [2021-11-07 02:22:05,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:22:05,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:22:05,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:22:05,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:22:05,039 INFO L87 Difference]: Start difference. First operand 18877 states and 35251 transitions. Second operand has 6 states, 6 states have (on average 19.0) internal successors, (114), 5 states have internal predecessors, (114), 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) [2021-11-07 02:22:07,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:22:07,682 INFO L93 Difference]: Finished difference Result 54342 states and 101377 transitions. [2021-11-07 02:22:07,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 02:22:07,682 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 5 states have internal predecessors, (114), 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 64 [2021-11-07 02:22:07,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:22:07,726 INFO L225 Difference]: With dead ends: 54342 [2021-11-07 02:22:07,726 INFO L226 Difference]: Without dead ends: 38922 [2021-11-07 02:22:07,740 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-07 02:22:07,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38922 states. [2021-11-07 02:22:08,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38922 to 15673. [2021-11-07 02:22:08,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15673 states, 15668 states have (on average 1.8586290528465663) internal successors, (29121), 15672 states have internal predecessors, (29121), 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) [2021-11-07 02:22:08,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15673 states to 15673 states and 29121 transitions. [2021-11-07 02:22:08,506 INFO L78 Accepts]: Start accepts. Automaton has 15673 states and 29121 transitions. Word has length 64 [2021-11-07 02:22:08,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:22:08,506 INFO L470 AbstractCegarLoop]: Abstraction has 15673 states and 29121 transitions. [2021-11-07 02:22:08,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 5 states have internal predecessors, (114), 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) [2021-11-07 02:22:08,507 INFO L276 IsEmpty]: Start isEmpty. Operand 15673 states and 29121 transitions. [2021-11-07 02:22:08,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 02:22:08,509 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:22:08,509 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] [2021-11-07 02:22:08,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 02:22:08,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:22:08,723 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)] === [2021-11-07 02:22:08,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:22:08,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1225980329, now seen corresponding path program 1 times [2021-11-07 02:22:08,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:22:08,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [148960713] [2021-11-07 02:22:08,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:08,724 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:22:08,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:22:08,725 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:22:08,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 02:22:09,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:09,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:22:09,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:09,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:09,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:09,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:09,677 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:22:09,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [148960713] [2021-11-07 02:22:09,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [148960713] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:22:09,678 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:22:09,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-07 02:22:09,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378208910] [2021-11-07 02:22:09,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:22:09,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:22:09,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:22:09,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:22:09,683 INFO L87 Difference]: Start difference. First operand 15673 states and 29121 transitions. Second operand has 4 states, 4 states have (on average 30.0) internal successors, (120), 3 states have internal predecessors, (120), 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) [2021-11-07 02:22:11,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:22:11,432 INFO L93 Difference]: Finished difference Result 59834 states and 111233 transitions. [2021-11-07 02:22:11,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:22:11,432 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 3 states have internal predecessors, (120), 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 64 [2021-11-07 02:22:11,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:22:11,489 INFO L225 Difference]: With dead ends: 59834 [2021-11-07 02:22:11,490 INFO L226 Difference]: Without dead ends: 44334 [2021-11-07 02:22:11,501 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:22:11,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44334 states. [2021-11-07 02:22:13,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44334 to 44304. [2021-11-07 02:22:13,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44304 states, 44299 states have (on average 1.8534729903609561) internal successors, (82107), 44303 states have internal predecessors, (82107), 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) [2021-11-07 02:22:13,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44304 states to 44304 states and 82107 transitions. [2021-11-07 02:22:13,422 INFO L78 Accepts]: Start accepts. Automaton has 44304 states and 82107 transitions. Word has length 64 [2021-11-07 02:22:13,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:22:13,423 INFO L470 AbstractCegarLoop]: Abstraction has 44304 states and 82107 transitions. [2021-11-07 02:22:13,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 3 states have internal predecessors, (120), 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) [2021-11-07 02:22:13,423 INFO L276 IsEmpty]: Start isEmpty. Operand 44304 states and 82107 transitions. [2021-11-07 02:22:13,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 02:22:13,425 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:22:13,425 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] [2021-11-07 02:22:13,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 02:22:13,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:22:13,641 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)] === [2021-11-07 02:22:13,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:22:13,641 INFO L85 PathProgramCache]: Analyzing trace with hash 2119908244, now seen corresponding path program 1 times [2021-11-07 02:22:13,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:22:13,641 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1259373713] [2021-11-07 02:22:13,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:13,642 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:22:13,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:22:13,643 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:22:13,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 02:22:14,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:14,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:22:14,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:14,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:14,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:14,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:14,581 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:22:14,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1259373713] [2021-11-07 02:22:14,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1259373713] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:22:14,581 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:22:14,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-07 02:22:14,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914672214] [2021-11-07 02:22:14,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:22:14,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:22:14,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:22:14,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:22:14,583 INFO L87 Difference]: Start difference. First operand 44304 states and 82107 transitions. Second operand has 4 states, 4 states have (on average 30.5) internal successors, (122), 3 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) [2021-11-07 02:22:19,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:22:19,281 INFO L93 Difference]: Finished difference Result 172387 states and 319374 transitions. [2021-11-07 02:22:19,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:22:19,282 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 3 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 65 [2021-11-07 02:22:19,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:22:19,661 INFO L225 Difference]: With dead ends: 172387 [2021-11-07 02:22:19,661 INFO L226 Difference]: Without dead ends: 128257 [2021-11-07 02:22:19,699 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:22:19,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128257 states. [2021-11-07 02:22:25,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128257 to 128227. [2021-11-07 02:22:25,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128227 states, 128222 states have (on average 1.848645318276115) internal successors, (237037), 128226 states have internal predecessors, (237037), 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) [2021-11-07 02:22:25,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128227 states to 128227 states and 237037 transitions. [2021-11-07 02:22:25,621 INFO L78 Accepts]: Start accepts. Automaton has 128227 states and 237037 transitions. Word has length 65 [2021-11-07 02:22:25,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:22:25,622 INFO L470 AbstractCegarLoop]: Abstraction has 128227 states and 237037 transitions. [2021-11-07 02:22:25,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 3 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) [2021-11-07 02:22:25,622 INFO L276 IsEmpty]: Start isEmpty. Operand 128227 states and 237037 transitions. [2021-11-07 02:22:25,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 02:22:25,624 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:22:25,624 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] [2021-11-07 02:22:25,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 02:22:25,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:22:25,835 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)] === [2021-11-07 02:22:25,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:22:25,835 INFO L85 PathProgramCache]: Analyzing trace with hash -680435186, now seen corresponding path program 1 times [2021-11-07 02:22:25,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:22:25,836 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [395595336] [2021-11-07 02:22:25,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:25,836 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:22:25,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:22:25,837 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:22:25,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc44429-e1ba-47bc-baf8-3decdc405c00/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 02:22:26,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:26,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:22:26,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:26,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:26,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:26,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:26,978 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:22:26,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [395595336] [2021-11-07 02:22:26,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [395595336] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:22:26,979 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:22:26,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-07 02:22:26,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916062384] [2021-11-07 02:22:26,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:22:26,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:22:26,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:22:26,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:22:26,981 INFO L87 Difference]: Start difference. First operand 128227 states and 237037 transitions. Second operand has 4 states, 4 states have (on average 31.0) internal successors, (124), 3 states have internal predecessors, (124), 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)