./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product22.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_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/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_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product22.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/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_f6f58643-55b4-468f-a553-5a13499409d3/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 f0289d2bc768d77152556c65688d1c231999d9919b651d65a3b9e8da8ee9b3f9 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:09:41,228 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:09:41,231 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:09:41,298 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:09:41,298 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:09:41,304 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:09:41,306 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:09:41,310 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:09:41,313 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:09:41,320 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:09:41,321 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:09:41,324 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:09:41,324 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:09:41,327 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:09:41,330 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:09:41,335 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:09:41,337 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:09:41,339 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:09:41,341 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:09:41,351 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:09:41,353 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:09:41,355 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:09:41,359 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:09:41,360 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:09:41,370 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:09:41,371 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:09:41,371 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:09:41,373 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:09:41,374 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:09:41,376 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:09:41,376 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:09:41,377 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:09:41,379 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:09:41,380 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:09:41,382 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:09:41,383 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:09:41,383 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:09:41,384 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:09:41,384 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:09:41,385 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:09:41,386 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:09:41,387 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 02:09:41,434 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:09:41,435 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:09:41,436 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:09:41,437 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:09:41,437 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:09:41,437 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:09:41,437 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:09:41,438 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:09:41,438 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:09:41,438 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:09:41,446 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:09:41,446 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:09:41,447 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:09:41,447 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:09:41,447 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:09:41,448 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:09:41,448 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:09:41,449 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:09:41,449 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:09:41,449 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:09:41,449 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:09:41,449 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:09:41,450 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:09:41,450 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:09:41,450 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:09:41,450 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:09:41,451 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:09:41,451 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:09:41,451 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:09:41,453 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:09:41,454 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:09:41,454 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:09:41,455 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:09:41,455 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:09:41,455 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:09:41,455 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:09:41,456 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:09:41,456 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:09:41,456 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:09:41,456 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_f6f58643-55b4-468f-a553-5a13499409d3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f0289d2bc768d77152556c65688d1c231999d9919b651d65a3b9e8da8ee9b3f9 [2021-11-07 02:09:41,753 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:09:41,775 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:09:41,778 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:09:41,779 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:09:41,780 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:09:41,781 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec1_product22.cil.c [2021-11-07 02:09:41,877 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/data/fd8f99d08/f1f5dc58a302459180fd42a64c14d553/FLAGdd31943be [2021-11-07 02:09:42,610 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:09:42,615 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/sv-benchmarks/c/product-lines/elevator_spec1_product22.cil.c [2021-11-07 02:09:42,651 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/data/fd8f99d08/f1f5dc58a302459180fd42a64c14d553/FLAGdd31943be [2021-11-07 02:09:42,753 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/data/fd8f99d08/f1f5dc58a302459180fd42a64c14d553 [2021-11-07 02:09:42,755 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:09:42,757 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:09:42,773 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:09:42,773 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:09:42,777 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:09:42,778 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:09:42" (1/1) ... [2021-11-07 02:09:42,779 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68e60762 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:42, skipping insertion in model container [2021-11-07 02:09:42,780 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:09:42" (1/1) ... [2021-11-07 02:09:42,789 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:09:42,881 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:09:43,324 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_f6f58643-55b4-468f-a553-5a13499409d3/sv-benchmarks/c/product-lines/elevator_spec1_product22.cil.c[27271,27284] [2021-11-07 02:09:43,592 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:09:43,606 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 02:09:43,607 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4ef296ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:43, skipping insertion in model container [2021-11-07 02:09:43,607 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:09:43,608 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 02:09:43,611 INFO L168 Benchmark]: Toolchain (without parser) took 852.07 ms. Allocated memory was 92.3 MB in the beginning and 123.7 MB in the end (delta: 31.5 MB). Free memory was 55.1 MB in the beginning and 86.4 MB in the end (delta: -31.3 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2021-11-07 02:09:43,612 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 92.3 MB. Free memory was 63.8 MB in the beginning and 63.8 MB in the end (delta: 21.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 02:09:43,614 INFO L168 Benchmark]: CACSL2BoogieTranslator took 835.15 ms. Allocated memory was 92.3 MB in the beginning and 123.7 MB in the end (delta: 31.5 MB). Free memory was 54.9 MB in the beginning and 86.4 MB in the end (delta: -31.5 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2021-11-07 02:09:43,616 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 92.3 MB. Free memory was 63.8 MB in the beginning and 63.8 MB in the end (delta: 21.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 835.15 ms. Allocated memory was 92.3 MB in the beginning and 123.7 MB in the end (delta: 31.5 MB). Free memory was 54.9 MB in the beginning and 86.4 MB in the end (delta: -31.5 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 77]: 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_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/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_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product22.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/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_f6f58643-55b4-468f-a553-5a13499409d3/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 f0289d2bc768d77152556c65688d1c231999d9919b651d65a3b9e8da8ee9b3f9 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:09:46,092 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:09:46,096 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:09:46,159 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:09:46,160 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:09:46,162 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:09:46,164 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:09:46,167 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:09:46,169 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:09:46,171 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:09:46,173 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:09:46,175 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:09:46,175 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:09:46,177 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:09:46,179 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:09:46,181 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:09:46,183 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:09:46,184 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:09:46,187 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:09:46,190 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:09:46,192 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:09:46,194 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:09:46,196 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:09:46,198 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:09:46,202 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:09:46,203 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:09:46,204 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:09:46,205 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:09:46,206 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:09:46,207 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:09:46,208 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:09:46,209 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:09:46,211 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:09:46,212 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:09:46,214 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:09:46,214 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:09:46,231 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:09:46,232 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:09:46,232 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:09:46,233 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:09:46,234 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:09:46,237 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 02:09:46,266 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:09:46,266 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:09:46,267 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:09:46,267 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:09:46,268 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:09:46,268 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:09:46,268 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:09:46,268 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:09:46,269 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:09:46,269 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:09:46,270 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:09:46,270 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:09:46,270 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:09:46,270 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:09:46,271 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:09:46,271 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:09:46,271 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:09:46,271 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 02:09:46,272 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 02:09:46,272 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:09:46,272 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:09:46,272 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:09:46,272 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:09:46,273 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:09:46,273 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 02:09:46,273 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:09:46,273 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:09:46,274 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:09:46,274 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:09:46,274 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:09:46,274 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 02:09:46,275 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 02:09:46,275 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:09:46,275 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:09:46,275 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:09:46,276 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_f6f58643-55b4-468f-a553-5a13499409d3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f0289d2bc768d77152556c65688d1c231999d9919b651d65a3b9e8da8ee9b3f9 [2021-11-07 02:09:46,702 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:09:46,726 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:09:46,730 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:09:46,731 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:09:46,732 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:09:46,735 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec1_product22.cil.c [2021-11-07 02:09:46,820 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/data/9b82729a4/55511e594f9646ca8f901f8a27f9017f/FLAG94790fec8 [2021-11-07 02:09:47,657 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:09:47,658 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/sv-benchmarks/c/product-lines/elevator_spec1_product22.cil.c [2021-11-07 02:09:47,695 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/data/9b82729a4/55511e594f9646ca8f901f8a27f9017f/FLAG94790fec8 [2021-11-07 02:09:47,761 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/data/9b82729a4/55511e594f9646ca8f901f8a27f9017f [2021-11-07 02:09:47,766 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:09:47,768 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:09:47,772 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:09:47,772 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:09:47,777 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:09:47,778 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:09:47" (1/1) ... [2021-11-07 02:09:47,780 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52a8faef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:47, skipping insertion in model container [2021-11-07 02:09:47,780 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:09:47" (1/1) ... [2021-11-07 02:09:47,813 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:09:47,931 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:09:48,473 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_f6f58643-55b4-468f-a553-5a13499409d3/sv-benchmarks/c/product-lines/elevator_spec1_product22.cil.c[27271,27284] [2021-11-07 02:09:48,790 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:09:48,813 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 02:09:48,843 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:09:48,932 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_f6f58643-55b4-468f-a553-5a13499409d3/sv-benchmarks/c/product-lines/elevator_spec1_product22.cil.c[27271,27284] [2021-11-07 02:09:49,075 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:09:49,094 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:09:49,146 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_f6f58643-55b4-468f-a553-5a13499409d3/sv-benchmarks/c/product-lines/elevator_spec1_product22.cil.c[27271,27284] [2021-11-07 02:09:49,209 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:09:49,256 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:09:49,261 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:49 WrapperNode [2021-11-07 02:09:49,262 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:09:49,263 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:09:49,263 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:09:49,264 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:09:49,273 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:49" (1/1) ... [2021-11-07 02:09:49,352 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:49" (1/1) ... [2021-11-07 02:09:49,810 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:09:49,811 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:09:49,812 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:09:49,812 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:09:49,822 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:49" (1/1) ... [2021-11-07 02:09:49,823 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:49" (1/1) ... [2021-11-07 02:09:49,890 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:49" (1/1) ... [2021-11-07 02:09:49,903 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:49" (1/1) ... [2021-11-07 02:09:50,196 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:49" (1/1) ... [2021-11-07 02:09:50,548 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:49" (1/1) ... [2021-11-07 02:09:50,620 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:49" (1/1) ... [2021-11-07 02:09:50,758 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:09:50,760 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:09:50,762 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:09:50,763 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:09:50,764 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:49" (1/1) ... [2021-11-07 02:09:50,772 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:09:50,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:09:50,838 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:09:50,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:09:50,970 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:09:50,970 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 02:09:50,970 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:09:50,970 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:10:10,594 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:10:10,594 INFO L299 CfgBuilder]: Removed 1433 assume(true) statements. [2021-11-07 02:10:10,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:10:10 BoogieIcfgContainer [2021-11-07 02:10:10,604 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:10:10,607 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:10:10,607 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:10:10,610 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:10:10,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:09:47" (1/3) ... [2021-11-07 02:10:10,611 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1901d459 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:10:10, skipping insertion in model container [2021-11-07 02:10:10,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:49" (2/3) ... [2021-11-07 02:10:10,612 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1901d459 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:10:10, skipping insertion in model container [2021-11-07 02:10:10,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:10:10" (3/3) ... [2021-11-07 02:10:10,614 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product22.cil.c [2021-11-07 02:10:10,620 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:10:10,620 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-11-07 02:10:10,693 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:10:10,699 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 02:10:10,700 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-07 02:10:10,840 INFO L276 IsEmpty]: Start isEmpty. Operand has 6691 states, 6685 states have (on average 1.8967838444278236) internal successors, (12680), 6690 states have internal predecessors, (12680), 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 02:10:10,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-07 02:10:10,863 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:10:10,864 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:10:10,864 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 02:10:10,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:10:10,874 INFO L85 PathProgramCache]: Analyzing trace with hash -204439617, now seen corresponding path program 1 times [2021-11-07 02:10:10,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:10:10,891 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1313841435] [2021-11-07 02:10:10,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:10:10,892 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:10:10,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:10:10,896 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:10:10,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 02:10:11,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:10:11,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 02:10:11,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:11,519 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 02:10:11,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:11,595 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 02:10:11,596 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:10:11,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1313841435] [2021-11-07 02:10:11,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1313841435] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:10:11,597 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:10:11,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:10:11,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264968767] [2021-11-07 02:10:11,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 02:10:11,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:10:11,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 02:10:11,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:10:11,651 INFO L87 Difference]: Start difference. First operand has 6691 states, 6685 states have (on average 1.8967838444278236) internal successors, (12680), 6690 states have internal predecessors, (12680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 18.0) internal successors, (36), 2 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:11,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:10:11,859 INFO L93 Difference]: Finished difference Result 6710 states and 12703 transitions. [2021-11-07 02:10:11,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 02:10:11,861 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 18.0) internal successors, (36), 2 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-07 02:10:11,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:10:11,941 INFO L225 Difference]: With dead ends: 6710 [2021-11-07 02:10:11,941 INFO L226 Difference]: Without dead ends: 6687 [2021-11-07 02:10:11,952 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:10:11,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6687 states. [2021-11-07 02:10:12,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6687 to 6687. [2021-11-07 02:10:12,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6687 states, 6682 states have (on average 1.89583956899132) internal successors, (12668), 6686 states have internal predecessors, (12668), 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 02:10:12,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6687 states to 6687 states and 12668 transitions. [2021-11-07 02:10:12,270 INFO L78 Accepts]: Start accepts. Automaton has 6687 states and 12668 transitions. Word has length 36 [2021-11-07 02:10:12,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:10:12,271 INFO L470 AbstractCegarLoop]: Abstraction has 6687 states and 12668 transitions. [2021-11-07 02:10:12,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 18.0) internal successors, (36), 2 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:12,272 INFO L276 IsEmpty]: Start isEmpty. Operand 6687 states and 12668 transitions. [2021-11-07 02:10:12,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-07 02:10:12,281 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:10:12,282 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:10:12,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 02:10:12,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:10:12,499 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 02:10:12,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:10:12,500 INFO L85 PathProgramCache]: Analyzing trace with hash 615247470, now seen corresponding path program 1 times [2021-11-07 02:10:12,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:10:12,502 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1893035946] [2021-11-07 02:10:12,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:10:12,502 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:10:12,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:10:12,506 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:10:12,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 02:10:12,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:10:12,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:10:12,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:13,067 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 02:10:13,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:13,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:10:13,231 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:10:13,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1893035946] [2021-11-07 02:10:13,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1893035946] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:10:13,232 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:10:13,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:10:13,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398813060] [2021-11-07 02:10:13,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:10:13,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:10:13,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:10:13,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:10:13,243 INFO L87 Difference]: Start difference. First operand 6687 states and 12668 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:14,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:10:14,203 INFO L93 Difference]: Finished difference Result 19981 states and 37861 transitions. [2021-11-07 02:10:14,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:10:14,204 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-07 02:10:14,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:10:14,298 INFO L225 Difference]: With dead ends: 19981 [2021-11-07 02:10:14,299 INFO L226 Difference]: Without dead ends: 13307 [2021-11-07 02:10:14,326 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:10:14,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13307 states. [2021-11-07 02:10:14,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13307 to 6687. [2021-11-07 02:10:14,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6687 states, 6682 states have (on average 1.894791978449566) internal successors, (12661), 6686 states have internal predecessors, (12661), 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 02:10:14,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6687 states to 6687 states and 12661 transitions. [2021-11-07 02:10:14,895 INFO L78 Accepts]: Start accepts. Automaton has 6687 states and 12661 transitions. Word has length 38 [2021-11-07 02:10:14,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:10:14,896 INFO L470 AbstractCegarLoop]: Abstraction has 6687 states and 12661 transitions. [2021-11-07 02:10:14,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:14,896 INFO L276 IsEmpty]: Start isEmpty. Operand 6687 states and 12661 transitions. [2021-11-07 02:10:14,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 02:10:14,912 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:10:14,913 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 02:10:14,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 02:10:15,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:10:15,113 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 02:10:15,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:10:15,114 INFO L85 PathProgramCache]: Analyzing trace with hash 694064689, now seen corresponding path program 1 times [2021-11-07 02:10:15,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:10:15,116 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1251109545] [2021-11-07 02:10:15,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:10:15,117 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:10:15,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:10:15,120 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:10:15,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 02:10:15,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:10:15,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:10:15,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:15,671 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 02:10:15,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:15,810 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 02:10:15,810 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:10:15,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1251109545] [2021-11-07 02:10:15,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1251109545] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:10:15,811 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:10:15,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:10:15,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210031331] [2021-11-07 02:10:15,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:10:15,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:10:15,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:10:15,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:10:15,813 INFO L87 Difference]: Start difference. First operand 6687 states and 12661 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 02:10:18,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:10:18,823 INFO L93 Difference]: Finished difference Result 46284 states and 87679 transitions. [2021-11-07 02:10:18,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 02:10:18,824 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 02:10:18,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:10:19,031 INFO L225 Difference]: With dead ends: 46284 [2021-11-07 02:10:19,032 INFO L226 Difference]: Without dead ends: 39619 [2021-11-07 02:10:19,060 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:10:19,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39619 states. [2021-11-07 02:10:19,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39619 to 6665. [2021-11-07 02:10:19,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6665 states, 6660 states have (on average 1.8933933933933933) internal successors, (12610), 6664 states have internal predecessors, (12610), 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 02:10:19,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6665 states to 6665 states and 12610 transitions. [2021-11-07 02:10:19,918 INFO L78 Accepts]: Start accepts. Automaton has 6665 states and 12610 transitions. Word has length 44 [2021-11-07 02:10:19,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:10:19,919 INFO L470 AbstractCegarLoop]: Abstraction has 6665 states and 12610 transitions. [2021-11-07 02:10:19,922 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 02:10:19,922 INFO L276 IsEmpty]: Start isEmpty. Operand 6665 states and 12610 transitions. [2021-11-07 02:10:19,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-07 02:10:19,925 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:10:19,925 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:10:19,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 02:10:20,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:10:20,147 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 02:10:20,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:10:20,148 INFO L85 PathProgramCache]: Analyzing trace with hash -2056567568, now seen corresponding path program 1 times [2021-11-07 02:10:20,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:10:20,150 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1420080427] [2021-11-07 02:10:20,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:10:20,151 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:10:20,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:10:20,152 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:10:20,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 02:10:20,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:10:20,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:10:20,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:20,690 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 02:10:20,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:20,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:10:20,829 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:10:20,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1420080427] [2021-11-07 02:10:20,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1420080427] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:10:20,831 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:10:20,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:10:20,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330703490] [2021-11-07 02:10:20,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:10:20,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:10:20,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:10:20,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:10:20,835 INFO L87 Difference]: Start difference. First operand 6665 states and 12610 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:21,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:10:21,812 INFO L93 Difference]: Finished difference Result 19892 states and 37665 transitions. [2021-11-07 02:10:21,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:10:21,813 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-07 02:10:21,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:10:21,866 INFO L225 Difference]: With dead ends: 19892 [2021-11-07 02:10:21,866 INFO L226 Difference]: Without dead ends: 13249 [2021-11-07 02:10:21,878 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:10:21,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13249 states. [2021-11-07 02:10:22,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13249 to 6665. [2021-11-07 02:10:22,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6665 states, 6660 states have (on average 1.8917417417417417) internal successors, (12599), 6664 states have internal predecessors, (12599), 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 02:10:22,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6665 states to 6665 states and 12599 transitions. [2021-11-07 02:10:22,342 INFO L78 Accepts]: Start accepts. Automaton has 6665 states and 12599 transitions. Word has length 46 [2021-11-07 02:10:22,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:10:22,343 INFO L470 AbstractCegarLoop]: Abstraction has 6665 states and 12599 transitions. [2021-11-07 02:10:22,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:22,343 INFO L276 IsEmpty]: Start isEmpty. Operand 6665 states and 12599 transitions. [2021-11-07 02:10:22,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 02:10:22,345 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:10:22,345 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 02:10:22,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 02:10:22,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:10:22,559 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 02:10:22,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:10:22,559 INFO L85 PathProgramCache]: Analyzing trace with hash 185398267, now seen corresponding path program 1 times [2021-11-07 02:10:22,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:10:22,560 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1615758485] [2021-11-07 02:10:22,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:10:22,561 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:10:22,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:10:22,562 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:10:22,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 02:10:23,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:10:23,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 02:10:23,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:23,218 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 02:10:23,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:23,407 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 02:10:23,407 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:10:23,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1615758485] [2021-11-07 02:10:23,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1615758485] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:10:23,408 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:10:23,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 02:10:23,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383521515] [2021-11-07 02:10:23,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:10:23,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:10:23,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:10:23,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:10:23,410 INFO L87 Difference]: Start difference. First operand 6665 states and 12599 transitions. Second operand has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:27,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:10:27,543 INFO L93 Difference]: Finished difference Result 72559 states and 137423 transitions. [2021-11-07 02:10:27,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 02:10:27,544 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-07 02:10:27,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:10:27,756 INFO L225 Difference]: With dead ends: 72559 [2021-11-07 02:10:27,757 INFO L226 Difference]: Without dead ends: 65919 [2021-11-07 02:10:27,784 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-11-07 02:10:27,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65919 states. [2021-11-07 02:10:28,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65919 to 6667. [2021-11-07 02:10:28,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6667 states, 6662 states have (on average 1.8907235064545183) internal successors, (12596), 6666 states have internal predecessors, (12596), 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 02:10:28,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6667 states to 6667 states and 12596 transitions. [2021-11-07 02:10:28,429 INFO L78 Accepts]: Start accepts. Automaton has 6667 states and 12596 transitions. Word has length 52 [2021-11-07 02:10:28,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:10:28,430 INFO L470 AbstractCegarLoop]: Abstraction has 6667 states and 12596 transitions. [2021-11-07 02:10:28,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:28,430 INFO L276 IsEmpty]: Start isEmpty. Operand 6667 states and 12596 transitions. [2021-11-07 02:10:28,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-07 02:10:28,432 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:10:28,432 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 02:10:28,446 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-07 02:10:28,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:10:28,649 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 02:10:28,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:10:28,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1613342136, now seen corresponding path program 1 times [2021-11-07 02:10:28,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:10:28,652 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [929787575] [2021-11-07 02:10:28,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:10:28,652 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:10:28,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:10:28,653 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:10:28,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 02:10:29,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:10:29,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:10:29,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:29,447 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 02:10:29,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:29,630 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 02:10:29,630 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:10:29,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [929787575] [2021-11-07 02:10:29,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [929787575] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:10:29,631 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:10:29,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 02:10:29,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672699744] [2021-11-07 02:10:29,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:10:29,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:10:29,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:10:29,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:10:29,633 INFO L87 Difference]: Start difference. First operand 6667 states and 12596 transitions. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:33,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:10:33,720 INFO L93 Difference]: Finished difference Result 72527 states and 137344 transitions. [2021-11-07 02:10:33,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 02:10:33,721 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-07 02:10:33,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:10:33,879 INFO L225 Difference]: With dead ends: 72527 [2021-11-07 02:10:33,879 INFO L226 Difference]: Without dead ends: 65887 [2021-11-07 02:10:33,903 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-11-07 02:10:33,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65887 states. [2021-11-07 02:10:34,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65887 to 6671. [2021-11-07 02:10:34,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6671 states, 6666 states have (on average 1.89003900390039) internal successors, (12599), 6670 states have internal predecessors, (12599), 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 02:10:34,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6671 states to 6671 states and 12599 transitions. [2021-11-07 02:10:34,664 INFO L78 Accepts]: Start accepts. Automaton has 6671 states and 12599 transitions. Word has length 54 [2021-11-07 02:10:34,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:10:34,665 INFO L470 AbstractCegarLoop]: Abstraction has 6671 states and 12599 transitions. [2021-11-07 02:10:34,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:34,665 INFO L276 IsEmpty]: Start isEmpty. Operand 6671 states and 12599 transitions. [2021-11-07 02:10:34,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-07 02:10:34,666 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:10:34,667 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 02:10:34,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 02:10:34,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:10:34,881 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 02:10:34,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:10:34,886 INFO L85 PathProgramCache]: Analyzing trace with hash -438767749, now seen corresponding path program 1 times [2021-11-07 02:10:34,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:10:34,887 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [236986603] [2021-11-07 02:10:34,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:10:34,887 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:10:34,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:10:34,888 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:10:34,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 02:10:35,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:10:35,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:10:35,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:35,467 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 02:10:35,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:35,598 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 02:10:35,598 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:10:35,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [236986603] [2021-11-07 02:10:35,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [236986603] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:10:35,599 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:10:35,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:10:35,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634035619] [2021-11-07 02:10:35,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:10:35,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:10:35,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:10:35,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:10:35,601 INFO L87 Difference]: Start difference. First operand 6671 states and 12599 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:36,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:10:36,038 INFO L93 Difference]: Finished difference Result 13290 states and 25129 transitions. [2021-11-07 02:10:36,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:10:36,038 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-07 02:10:36,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:10:36,046 INFO L225 Difference]: With dead ends: 13290 [2021-11-07 02:10:36,046 INFO L226 Difference]: Without dead ends: 6650 [2021-11-07 02:10:36,056 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:10:36,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6650 states. [2021-11-07 02:10:36,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6650 to 6650. [2021-11-07 02:10:36,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6650 states, 6645 states have (on average 1.890293453724605) internal successors, (12561), 6649 states have internal predecessors, (12561), 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 02:10:36,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6650 states to 6650 states and 12561 transitions. [2021-11-07 02:10:36,411 INFO L78 Accepts]: Start accepts. Automaton has 6650 states and 12561 transitions. Word has length 56 [2021-11-07 02:10:36,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:10:36,412 INFO L470 AbstractCegarLoop]: Abstraction has 6650 states and 12561 transitions. [2021-11-07 02:10:36,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:36,412 INFO L276 IsEmpty]: Start isEmpty. Operand 6650 states and 12561 transitions. [2021-11-07 02:10:36,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-07 02:10:36,413 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:10:36,414 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:10:36,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 02:10:36,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:10:36,632 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 02:10:36,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:10:36,632 INFO L85 PathProgramCache]: Analyzing trace with hash 304192547, now seen corresponding path program 1 times [2021-11-07 02:10:36,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:10:36,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [992597609] [2021-11-07 02:10:36,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:10:36,633 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:10:36,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:10:36,634 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:10:36,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 02:10:37,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:10:37,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:10:37,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:37,246 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 02:10:37,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:37,391 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 02:10:37,391 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:10:37,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [992597609] [2021-11-07 02:10:37,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [992597609] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:10:37,393 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:10:37,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:10:37,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728141206] [2021-11-07 02:10:37,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:10:37,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:10:37,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:10:37,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:10:37,397 INFO L87 Difference]: Start difference. First operand 6650 states and 12561 transitions. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:37,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:10:37,952 INFO L93 Difference]: Finished difference Result 13234 states and 25032 transitions. [2021-11-07 02:10:37,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:10:37,961 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-07 02:10:37,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:10:37,972 INFO L225 Difference]: With dead ends: 13234 [2021-11-07 02:10:37,972 INFO L226 Difference]: Without dead ends: 6625 [2021-11-07 02:10:37,979 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:10:37,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6625 states. [2021-11-07 02:10:38,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6625 to 6625. [2021-11-07 02:10:38,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6625 states, 6620 states have (on average 1.890785498489426) internal successors, (12517), 6624 states have internal predecessors, (12517), 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 02:10:38,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6625 states to 6625 states and 12517 transitions. [2021-11-07 02:10:38,382 INFO L78 Accepts]: Start accepts. Automaton has 6625 states and 12517 transitions. Word has length 57 [2021-11-07 02:10:38,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:10:38,383 INFO L470 AbstractCegarLoop]: Abstraction has 6625 states and 12517 transitions. [2021-11-07 02:10:38,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:38,384 INFO L276 IsEmpty]: Start isEmpty. Operand 6625 states and 12517 transitions. [2021-11-07 02:10:38,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 02:10:38,385 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:10:38,385 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:10:38,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 02:10:38,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:10:38,596 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 02:10:38,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:10:38,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1907039084, now seen corresponding path program 1 times [2021-11-07 02:10:38,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:10:38,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1601899611] [2021-11-07 02:10:38,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:10:38,597 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:10:38,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:10:38,598 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:10:38,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 02:10:39,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:10:39,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:10:39,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:39,224 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 02:10:39,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:39,346 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 02:10:39,347 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:10:39,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1601899611] [2021-11-07 02:10:39,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1601899611] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:10:39,347 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:10:39,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:10:39,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309524195] [2021-11-07 02:10:39,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:10:39,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:10:39,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:10:39,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:10:39,350 INFO L87 Difference]: Start difference. First operand 6625 states and 12517 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:39,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:10:39,761 INFO L93 Difference]: Finished difference Result 13209 states and 24988 transitions. [2021-11-07 02:10:39,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:10:39,762 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-07 02:10:39,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:10:39,771 INFO L225 Difference]: With dead ends: 13209 [2021-11-07 02:10:39,771 INFO L226 Difference]: Without dead ends: 6622 [2021-11-07 02:10:39,778 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:10:39,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6622 states. [2021-11-07 02:10:40,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6622 to 6622. [2021-11-07 02:10:40,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6622 states, 6617 states have (on average 1.8904337312981714) internal successors, (12509), 6621 states have internal predecessors, (12509), 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 02:10:40,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6622 states to 6622 states and 12509 transitions. [2021-11-07 02:10:40,249 INFO L78 Accepts]: Start accepts. Automaton has 6622 states and 12509 transitions. Word has length 58 [2021-11-07 02:10:40,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:10:40,249 INFO L470 AbstractCegarLoop]: Abstraction has 6622 states and 12509 transitions. [2021-11-07 02:10:40,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:40,250 INFO L276 IsEmpty]: Start isEmpty. Operand 6622 states and 12509 transitions. [2021-11-07 02:10:40,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-07 02:10:40,251 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:10:40,251 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:10:40,264 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 02:10:40,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:10:40,460 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 02:10:40,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:10:40,461 INFO L85 PathProgramCache]: Analyzing trace with hash 427975005, now seen corresponding path program 1 times [2021-11-07 02:10:40,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:10:40,461 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2112697088] [2021-11-07 02:10:40,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:10:40,461 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:10:40,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:10:40,462 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:10:40,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 02:10:40,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:10:40,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 02:10:40,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:41,035 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 02:10:41,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:41,192 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 02:10:41,192 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:10:41,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2112697088] [2021-11-07 02:10:41,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2112697088] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:10:41,193 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:10:41,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 02:10:41,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37677137] [2021-11-07 02:10:41,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:10:41,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:10:41,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:10:41,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:10:41,194 INFO L87 Difference]: Start difference. First operand 6622 states and 12509 transitions. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:41,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:10:41,583 INFO L93 Difference]: Finished difference Result 13200 states and 24970 transitions. [2021-11-07 02:10:41,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:10:41,583 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-07 02:10:41,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:10:41,592 INFO L225 Difference]: With dead ends: 13200 [2021-11-07 02:10:41,592 INFO L226 Difference]: Without dead ends: 6620 [2021-11-07 02:10:41,599 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:10:41,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6620 states. [2021-11-07 02:10:41,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6620 to 6620. [2021-11-07 02:10:41,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6620 states, 6615 states have (on average 1.890098261526833) internal successors, (12503), 6619 states have internal predecessors, (12503), 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 02:10:41,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6620 states to 6620 states and 12503 transitions. [2021-11-07 02:10:41,903 INFO L78 Accepts]: Start accepts. Automaton has 6620 states and 12503 transitions. Word has length 59 [2021-11-07 02:10:41,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:10:41,903 INFO L470 AbstractCegarLoop]: Abstraction has 6620 states and 12503 transitions. [2021-11-07 02:10:41,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:41,904 INFO L276 IsEmpty]: Start isEmpty. Operand 6620 states and 12503 transitions. [2021-11-07 02:10:41,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 02:10:41,905 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:10:41,905 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:10:41,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 02:10:42,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:10:42,119 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 02:10:42,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:10:42,119 INFO L85 PathProgramCache]: Analyzing trace with hash 113578385, now seen corresponding path program 1 times [2021-11-07 02:10:42,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:10:42,120 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1681898421] [2021-11-07 02:10:42,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:10:42,120 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:10:42,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:10:42,121 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:10:42,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 02:10:42,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:10:42,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:10:42,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:42,853 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 02:10:42,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:43,033 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 02:10:43,033 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:10:43,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1681898421] [2021-11-07 02:10:43,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1681898421] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:10:43,034 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:10:43,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 02:10:43,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983560243] [2021-11-07 02:10:43,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:10:43,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:10:43,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:10:43,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:10:43,036 INFO L87 Difference]: Start difference. First operand 6620 states and 12503 transitions. Second operand has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:43,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:10:43,616 INFO L93 Difference]: Finished difference Result 13193 states and 24955 transitions. [2021-11-07 02:10:43,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:10:43,617 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-07 02:10:43,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:10:43,628 INFO L225 Difference]: With dead ends: 13193 [2021-11-07 02:10:43,628 INFO L226 Difference]: Without dead ends: 6618 [2021-11-07 02:10:43,637 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:10:43,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6618 states. [2021-11-07 02:10:44,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6618 to 6618. [2021-11-07 02:10:44,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6618 states, 6613 states have (on average 1.8897625888401632) internal successors, (12497), 6617 states have internal predecessors, (12497), 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 02:10:44,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6618 states to 6618 states and 12497 transitions. [2021-11-07 02:10:44,043 INFO L78 Accepts]: Start accepts. Automaton has 6618 states and 12497 transitions. Word has length 60 [2021-11-07 02:10:44,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:10:44,043 INFO L470 AbstractCegarLoop]: Abstraction has 6618 states and 12497 transitions. [2021-11-07 02:10:44,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:44,044 INFO L276 IsEmpty]: Start isEmpty. Operand 6618 states and 12497 transitions. [2021-11-07 02:10:44,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 02:10:44,045 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:10:44,045 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:10:44,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 02:10:44,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:10:44,248 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 02:10:44,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:10:44,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1604010734, now seen corresponding path program 1 times [2021-11-07 02:10:44,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:10:44,250 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1676802798] [2021-11-07 02:10:44,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:10:44,250 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:10:44,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:10:44,252 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:10:44,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 02:10:44,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:10:44,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:10:44,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:45,269 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 02:10:45,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:45,565 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 02:10:45,565 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:10:45,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1676802798] [2021-11-07 02:10:45,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1676802798] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:10:45,566 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:10:45,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-07 02:10:45,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282603201] [2021-11-07 02:10:45,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:10:45,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:10:45,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:10:45,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:10:45,568 INFO L87 Difference]: Start difference. First operand 6618 states and 12497 transitions. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:47,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:10:47,248 INFO L93 Difference]: Finished difference Result 17329 states and 32772 transitions. [2021-11-07 02:10:47,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:10:47,252 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-07 02:10:47,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:10:47,274 INFO L225 Difference]: With dead ends: 17329 [2021-11-07 02:10:47,274 INFO L226 Difference]: Without dead ends: 13988 [2021-11-07 02:10:47,283 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:10:47,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13988 states. [2021-11-07 02:10:47,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13988 to 8705. [2021-11-07 02:10:47,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8705 states, 8700 states have (on average 1.8910344827586207) internal successors, (16452), 8704 states have internal predecessors, (16452), 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 02:10:47,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8705 states to 8705 states and 16452 transitions. [2021-11-07 02:10:47,803 INFO L78 Accepts]: Start accepts. Automaton has 8705 states and 16452 transitions. Word has length 61 [2021-11-07 02:10:47,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:10:47,803 INFO L470 AbstractCegarLoop]: Abstraction has 8705 states and 16452 transitions. [2021-11-07 02:10:47,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:47,803 INFO L276 IsEmpty]: Start isEmpty. Operand 8705 states and 16452 transitions. [2021-11-07 02:10:47,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 02:10:47,810 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:10:47,811 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:10:47,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 02:10:48,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:10:48,025 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 02:10:48,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:10:48,025 INFO L85 PathProgramCache]: Analyzing trace with hash -678243071, now seen corresponding path program 1 times [2021-11-07 02:10:48,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:10:48,026 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [319960478] [2021-11-07 02:10:48,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:10:48,026 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:10:48,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:10:48,027 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:10:48,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 02:10:48,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:10:48,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:10:48,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:48,917 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 02:10:48,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:49,240 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 02:10:49,240 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:10:49,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [319960478] [2021-11-07 02:10:49,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [319960478] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:10:49,241 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:10:49,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-07 02:10:49,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458499883] [2021-11-07 02:10:49,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:10:49,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:10:49,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:10:49,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:10:49,242 INFO L87 Difference]: Start difference. First operand 8705 states and 16452 transitions. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 7 states have internal predecessors, (127), 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 02:10:50,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:10:50,137 INFO L93 Difference]: Finished difference Result 16370 states and 30734 transitions. [2021-11-07 02:10:50,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 02:10:50,138 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 7 states have internal predecessors, (127), 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 79 [2021-11-07 02:10:50,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:10:50,151 INFO L225 Difference]: With dead ends: 16370 [2021-11-07 02:10:50,151 INFO L226 Difference]: Without dead ends: 8829 [2021-11-07 02:10:50,159 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-07 02:10:50,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8829 states. [2021-11-07 02:10:50,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8829 to 6099. [2021-11-07 02:10:50,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6099 states, 6094 states have (on average 1.883163767640302) internal successors, (11476), 6098 states have internal predecessors, (11476), 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 02:10:50,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6099 states to 6099 states and 11476 transitions. [2021-11-07 02:10:50,615 INFO L78 Accepts]: Start accepts. Automaton has 6099 states and 11476 transitions. Word has length 79 [2021-11-07 02:10:50,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:10:50,615 INFO L470 AbstractCegarLoop]: Abstraction has 6099 states and 11476 transitions. [2021-11-07 02:10:50,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 7 states have internal predecessors, (127), 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 02:10:50,615 INFO L276 IsEmpty]: Start isEmpty. Operand 6099 states and 11476 transitions. [2021-11-07 02:10:50,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-07 02:10:50,618 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:10:50,618 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:10:50,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 02:10:50,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:10:50,821 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 02:10:50,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:10:50,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1129806194, now seen corresponding path program 1 times [2021-11-07 02:10:50,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:10:50,822 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1285589608] [2021-11-07 02:10:50,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:10:50,822 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:10:50,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:10:50,823 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:10:50,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 02:10:51,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:10:51,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:10:51,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:52,042 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 02:10:52,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:53,974 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 02:10:53,974 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:10:53,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1285589608] [2021-11-07 02:10:53,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1285589608] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:10:53,975 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:10:53,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-07 02:10:53,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154963813] [2021-11-07 02:10:53,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:10:53,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:10:53,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:10:53,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:10:53,976 INFO L87 Difference]: Start difference. First operand 6099 states and 11476 transitions. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 5 states have internal predecessors, (130), 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 02:10:58,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:10:58,171 INFO L93 Difference]: Finished difference Result 19358 states and 36521 transitions. [2021-11-07 02:10:58,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:10:58,175 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 5 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-07 02:10:58,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:10:58,193 INFO L225 Difference]: With dead ends: 19358 [2021-11-07 02:10:58,193 INFO L226 Difference]: Without dead ends: 13324 [2021-11-07 02:10:58,199 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:10:58,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13324 states. [2021-11-07 02:10:58,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13324 to 8479. [2021-11-07 02:10:58,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8479 states, 8474 states have (on average 1.8836440877979703) internal successors, (15962), 8478 states have internal predecessors, (15962), 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 02:10:58,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8479 states to 8479 states and 15962 transitions. [2021-11-07 02:10:58,695 INFO L78 Accepts]: Start accepts. Automaton has 8479 states and 15962 transitions. Word has length 80 [2021-11-07 02:10:58,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:10:58,696 INFO L470 AbstractCegarLoop]: Abstraction has 8479 states and 15962 transitions. [2021-11-07 02:10:58,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 5 states have internal predecessors, (130), 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 02:10:58,696 INFO L276 IsEmpty]: Start isEmpty. Operand 8479 states and 15962 transitions. [2021-11-07 02:10:58,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-07 02:10:58,698 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:10:58,698 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:10:58,710 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-07 02:10:58,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:10:58,899 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 02:10:58,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:10:58,899 INFO L85 PathProgramCache]: Analyzing trace with hash -339052000, now seen corresponding path program 1 times [2021-11-07 02:10:58,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:10:58,900 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1491831520] [2021-11-07 02:10:58,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:10:58,900 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:10:58,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:10:58,902 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:10:58,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 02:10:59,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:10:59,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:10:59,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:59,815 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 02:10:59,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:11:00,050 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 02:11:00,051 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:11:00,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1491831520] [2021-11-07 02:11:00,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1491831520] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:11:00,051 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:11:00,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 02:11:00,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633140255] [2021-11-07 02:11:00,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:11:00,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:11:00,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:11:00,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:11:00,053 INFO L87 Difference]: Start difference. First operand 8479 states and 15962 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:11:06,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:11:06,203 INFO L93 Difference]: Finished difference Result 36818 states and 69093 transitions. [2021-11-07 02:11:06,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 02:11:06,204 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-11-07 02:11:06,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:11:06,245 INFO L225 Difference]: With dead ends: 36818 [2021-11-07 02:11:06,245 INFO L226 Difference]: Without dead ends: 28403 [2021-11-07 02:11:06,258 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 157 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 02:11:06,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28403 states. [2021-11-07 02:11:06,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28403 to 8493. [2021-11-07 02:11:06,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8493 states, 8488 states have (on average 1.882186616399623) internal successors, (15976), 8492 states have internal predecessors, (15976), 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 02:11:06,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8493 states to 8493 states and 15976 transitions. [2021-11-07 02:11:06,881 INFO L78 Accepts]: Start accepts. Automaton has 8493 states and 15976 transitions. Word has length 81 [2021-11-07 02:11:06,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:11:06,882 INFO L470 AbstractCegarLoop]: Abstraction has 8493 states and 15976 transitions. [2021-11-07 02:11:06,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:11:06,882 INFO L276 IsEmpty]: Start isEmpty. Operand 8493 states and 15976 transitions. [2021-11-07 02:11:06,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 02:11:06,885 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:11:06,885 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:11:06,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 02:11:07,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:11:07,095 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 02:11:07,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:11:07,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1696452368, now seen corresponding path program 1 times [2021-11-07 02:11:07,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:11:07,096 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1924117012] [2021-11-07 02:11:07,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:11:07,096 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:11:07,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:11:07,097 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:11:07,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 02:11:07,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:11:07,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:11:07,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:11:08,024 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 02:11:08,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:11:08,249 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 02:11:08,249 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:11:08,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1924117012] [2021-11-07 02:11:08,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1924117012] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:11:08,249 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:11:08,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:11:08,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380565789] [2021-11-07 02:11:08,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:11:08,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:11:08,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:11:08,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:11:08,250 INFO L87 Difference]: Start difference. First operand 8493 states and 15976 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 3 states have internal predecessors, (82), 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 02:11:13,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:11:13,787 INFO L93 Difference]: Finished difference Result 26299 states and 49241 transitions. [2021-11-07 02:11:13,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:11:13,787 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 3 states have internal predecessors, (82), 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 82 [2021-11-07 02:11:13,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:11:13,811 INFO L225 Difference]: With dead ends: 26299 [2021-11-07 02:11:13,811 INFO L226 Difference]: Without dead ends: 17857 [2021-11-07 02:11:13,820 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 160 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 02:11:13,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17857 states. [2021-11-07 02:11:14,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17857 to 10596. [2021-11-07 02:11:14,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10596 states, 10591 states have (on average 1.8447738646020206) internal successors, (19538), 10595 states have internal predecessors, (19538), 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 02:11:14,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10596 states to 10596 states and 19538 transitions. [2021-11-07 02:11:14,526 INFO L78 Accepts]: Start accepts. Automaton has 10596 states and 19538 transitions. Word has length 82 [2021-11-07 02:11:14,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:11:14,526 INFO L470 AbstractCegarLoop]: Abstraction has 10596 states and 19538 transitions. [2021-11-07 02:11:14,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 3 states have internal predecessors, (82), 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 02:11:14,526 INFO L276 IsEmpty]: Start isEmpty. Operand 10596 states and 19538 transitions. [2021-11-07 02:11:14,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 02:11:14,528 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:11:14,529 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:11:14,558 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-11-07 02:11:14,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:11:14,758 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 02:11:14,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:11:14,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1550030730, now seen corresponding path program 1 times [2021-11-07 02:11:14,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:11:14,759 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [48922622] [2021-11-07 02:11:14,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:11:14,760 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:11:14,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:11:14,760 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:11:14,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 02:11:15,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:11:15,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:11:15,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:11:15,728 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 02:11:15,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:11:15,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:11:15,948 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:11:15,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [48922622] [2021-11-07 02:11:15,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [48922622] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:11:15,948 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:11:15,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 02:11:15,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130091374] [2021-11-07 02:11:15,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:11:15,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:11:15,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:11:15,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:11:15,950 INFO L87 Difference]: Start difference. First operand 10596 states and 19538 transitions. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 4 states have internal predecessors, (84), 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 02:11:20,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:11:20,495 INFO L93 Difference]: Finished difference Result 74303 states and 137615 transitions. [2021-11-07 02:11:20,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 02:11:20,496 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 4 states have internal predecessors, (84), 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 84 [2021-11-07 02:11:20,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:11:20,589 INFO L225 Difference]: With dead ends: 74303 [2021-11-07 02:11:20,589 INFO L226 Difference]: Without dead ends: 63767 [2021-11-07 02:11:20,611 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 163 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 02:11:20,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63767 states. [2021-11-07 02:11:21,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63767 to 16787. [2021-11-07 02:11:21,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16787 states, 16782 states have (on average 1.8459659158622332) internal successors, (30979), 16786 states have internal predecessors, (30979), 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 02:11:21,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16787 states to 16787 states and 30979 transitions. [2021-11-07 02:11:21,934 INFO L78 Accepts]: Start accepts. Automaton has 16787 states and 30979 transitions. Word has length 84 [2021-11-07 02:11:21,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:11:21,935 INFO L470 AbstractCegarLoop]: Abstraction has 16787 states and 30979 transitions. [2021-11-07 02:11:21,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 4 states have internal predecessors, (84), 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 02:11:21,935 INFO L276 IsEmpty]: Start isEmpty. Operand 16787 states and 30979 transitions. [2021-11-07 02:11:21,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-07 02:11:21,937 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:11:21,938 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:11:21,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 02:11:22,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:11:22,155 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:11:22,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:11:22,155 INFO L85 PathProgramCache]: Analyzing trace with hash 237600305, now seen corresponding path program 1 times [2021-11-07 02:11:22,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:11:22,155 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2126959651] [2021-11-07 02:11:22,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:11:22,156 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:11:22,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:11:22,156 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:11:22,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 02:11:22,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:11:22,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:11:22,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:11:23,162 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 02:11:23,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:11:23,408 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 02:11:23,408 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:11:23,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2126959651] [2021-11-07 02:11:23,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2126959651] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:11:23,409 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:11:23,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:11:23,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529415779] [2021-11-07 02:11:23,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:11:23,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:11:23,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:11:23,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:11:23,411 INFO L87 Difference]: Start difference. First operand 16787 states and 30979 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:11:25,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:11:25,363 INFO L93 Difference]: Finished difference Result 44077 states and 81448 transitions. [2021-11-07 02:11:25,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:11:25,363 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-07 02:11:25,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:11:25,401 INFO L225 Difference]: With dead ends: 44077 [2021-11-07 02:11:25,402 INFO L226 Difference]: Without dead ends: 29087 [2021-11-07 02:11:25,416 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:11:25,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29087 states. [2021-11-07 02:11:27,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29087 to 29072. [2021-11-07 02:11:27,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29072 states, 29067 states have (on average 1.8469742319468814) internal successors, (53686), 29071 states have internal predecessors, (53686), 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 02:11:27,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29072 states to 29072 states and 53686 transitions. [2021-11-07 02:11:27,237 INFO L78 Accepts]: Start accepts. Automaton has 29072 states and 53686 transitions. Word has length 85 [2021-11-07 02:11:27,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:11:27,237 INFO L470 AbstractCegarLoop]: Abstraction has 29072 states and 53686 transitions. [2021-11-07 02:11:27,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:11:27,237 INFO L276 IsEmpty]: Start isEmpty. Operand 29072 states and 53686 transitions. [2021-11-07 02:11:27,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-07 02:11:27,239 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:11:27,239 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:11:27,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-07 02:11:27,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:11:27,453 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:11:27,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:11:27,453 INFO L85 PathProgramCache]: Analyzing trace with hash 113185649, now seen corresponding path program 1 times [2021-11-07 02:11:27,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:11:27,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1750640709] [2021-11-07 02:11:27,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:11:27,454 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:11:27,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:11:27,454 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:11:27,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 02:11:28,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:11:28,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:11:28,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:11:28,514 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 02:11:28,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:11:28,898 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 02:11:28,898 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:11:28,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1750640709] [2021-11-07 02:11:28,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1750640709] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:11:28,898 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:11:28,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:11:28,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331021065] [2021-11-07 02:11:28,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:11:28,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:11:28,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:11:28,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:11:28,900 INFO L87 Difference]: Start difference. First operand 29072 states and 53686 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:11:32,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:11:32,116 INFO L93 Difference]: Finished difference Result 79691 states and 147259 transitions. [2021-11-07 02:11:32,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:11:32,117 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-11-07 02:11:32,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:11:32,200 INFO L225 Difference]: With dead ends: 79691 [2021-11-07 02:11:32,201 INFO L226 Difference]: Without dead ends: 53488 [2021-11-07 02:11:32,238 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:11:32,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53488 states. [2021-11-07 02:11:36,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53488 to 53473. [2021-11-07 02:11:36,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53473 states, 53468 states have (on average 1.8470861075783647) internal successors, (98760), 53472 states have internal predecessors, (98760), 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 02:11:36,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53473 states to 53473 states and 98760 transitions. [2021-11-07 02:11:36,318 INFO L78 Accepts]: Start accepts. Automaton has 53473 states and 98760 transitions. Word has length 86 [2021-11-07 02:11:36,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:11:36,318 INFO L470 AbstractCegarLoop]: Abstraction has 53473 states and 98760 transitions. [2021-11-07 02:11:36,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:11:36,319 INFO L276 IsEmpty]: Start isEmpty. Operand 53473 states and 98760 transitions. [2021-11-07 02:11:36,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-07 02:11:36,320 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:11:36,321 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:11:36,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-07 02:11:36,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:11:36,521 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:11:36,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:11:36,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1814813578, now seen corresponding path program 1 times [2021-11-07 02:11:36,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:11:36,522 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [521980159] [2021-11-07 02:11:36,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:11:36,522 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:11:36,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:11:36,523 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:11:36,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-07 02:11:37,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:11:37,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:11:37,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:11:37,611 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 02:11:37,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:11:37,863 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 02:11:37,864 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:11:37,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [521980159] [2021-11-07 02:11:37,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [521980159] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:11:37,864 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:11:37,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:11:37,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996643115] [2021-11-07 02:11:37,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:11:37,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:11:37,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:11:37,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:11:37,866 INFO L87 Difference]: Start difference. First operand 53473 states and 98760 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:11:44,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:11:44,429 INFO L93 Difference]: Finished difference Result 150581 states and 278134 transitions. [2021-11-07 02:11:44,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:11:44,430 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-11-07 02:11:44,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:11:44,586 INFO L225 Difference]: With dead ends: 150581 [2021-11-07 02:11:44,586 INFO L226 Difference]: Without dead ends: 101905 [2021-11-07 02:11:44,615 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:11:44,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101905 states. [2021-11-07 02:11:51,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101905 to 101890. [2021-11-07 02:11:51,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101890 states, 101885 states have (on average 1.846081366246258) internal successors, (188088), 101889 states have internal predecessors, (188088), 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 02:11:51,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101890 states to 101890 states and 188088 transitions. [2021-11-07 02:11:51,573 INFO L78 Accepts]: Start accepts. Automaton has 101890 states and 188088 transitions. Word has length 87 [2021-11-07 02:11:51,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:11:51,573 INFO L470 AbstractCegarLoop]: Abstraction has 101890 states and 188088 transitions. [2021-11-07 02:11:51,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:11:51,573 INFO L276 IsEmpty]: Start isEmpty. Operand 101890 states and 188088 transitions. [2021-11-07 02:11:51,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-07 02:11:51,575 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:11:51,575 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:11:51,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-07 02:11:51,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:11:51,776 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:11:51,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:11:51,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1329830696, now seen corresponding path program 1 times [2021-11-07 02:11:51,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:11:51,777 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [595992278] [2021-11-07 02:11:51,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:11:51,777 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:11:51,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:11:51,778 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:11:51,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6f58643-55b4-468f-a553-5a13499409d3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-07 02:11:52,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:11:52,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:11:52,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:11:52,952 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 02:11:52,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:11:53,184 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 02:11:53,184 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:11:53,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [595992278] [2021-11-07 02:11:53,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [595992278] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:11:53,184 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:11:53,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 02:11:53,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153740991] [2021-11-07 02:11:53,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:11:53,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:11:53,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:11:53,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:11:53,186 INFO L87 Difference]: Start difference. First operand 101890 states and 188088 transitions. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)