./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec13_product21.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_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/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_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec13_product21.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/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_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/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 bb3dce9b114483214f320874a7aac06c61be45c777f03f63c22a8ddab1e62ece --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:08:42,274 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:08:42,278 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:08:42,334 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:08:42,335 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:08:42,337 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:08:42,338 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:08:42,341 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:08:42,344 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:08:42,345 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:08:42,346 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:08:42,350 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:08:42,350 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:08:42,352 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:08:42,353 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:08:42,355 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:08:42,356 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:08:42,357 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:08:42,360 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:08:42,376 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:08:42,378 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:08:42,384 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:08:42,386 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:08:42,387 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:08:42,391 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:08:42,391 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:08:42,392 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:08:42,393 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:08:42,394 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:08:42,395 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:08:42,396 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:08:42,409 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:08:42,412 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:08:42,413 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:08:42,416 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:08:42,416 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:08:42,417 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:08:42,417 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:08:42,417 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:08:42,419 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:08:42,419 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:08:42,420 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:08:42,472 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:08:42,473 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:08:42,474 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:08:42,474 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:08:42,475 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:08:42,475 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:08:42,475 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:08:42,482 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:08:42,483 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:08:42,483 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:08:42,483 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:08:42,483 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:08:42,484 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:08:42,484 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:08:42,484 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:08:42,485 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:08:42,485 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:08:42,486 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:08:42,486 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:08:42,486 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:08:42,486 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:08:42,487 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:08:42,487 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:08:42,487 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:08:42,487 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:08:42,488 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:08:42,488 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:08:42,488 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:08:42,488 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:08:42,489 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:08:42,489 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:08:42,489 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:08:42,489 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:08:42,490 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:08:42,490 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:08:42,490 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:08:42,490 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:08:42,490 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:08:42,491 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:08:42,491 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_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bb3dce9b114483214f320874a7aac06c61be45c777f03f63c22a8ddab1e62ece [2021-11-07 01:08:42,771 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:08:42,802 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:08:42,805 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:08:42,806 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:08:42,807 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:08:42,808 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec13_product21.cil.c [2021-11-07 01:08:42,910 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/bin/utaipan-UUZaoUuFF8/data/fe1694ad5/432b076fd6224873b45c19ced7342368/FLAGb567f9074 [2021-11-07 01:08:43,469 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:08:43,470 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/sv-benchmarks/c/product-lines/elevator_spec13_product21.cil.c [2021-11-07 01:08:43,512 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/bin/utaipan-UUZaoUuFF8/data/fe1694ad5/432b076fd6224873b45c19ced7342368/FLAGb567f9074 [2021-11-07 01:08:43,715 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/bin/utaipan-UUZaoUuFF8/data/fe1694ad5/432b076fd6224873b45c19ced7342368 [2021-11-07 01:08:43,717 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:08:43,718 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:08:43,719 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:08:43,720 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:08:43,722 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:08:43,723 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:08:43" (1/1) ... [2021-11-07 01:08:43,724 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30927d40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:08:43, skipping insertion in model container [2021-11-07 01:08:43,724 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:08:43" (1/1) ... [2021-11-07 01:08:43,730 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:08:43,797 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:08:44,391 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_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/sv-benchmarks/c/product-lines/elevator_spec13_product21.cil.c[58922,58935] [2021-11-07 01:08:44,465 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:08:44,483 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 01:08:44,483 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2735fa38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:08:44, skipping insertion in model container [2021-11-07 01:08:44,484 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:08:44,484 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:08:44,487 INFO L168 Benchmark]: Toolchain (without parser) took 766.75 ms. Allocated memory is still 107.0 MB. Free memory was 68.2 MB in the beginning and 67.6 MB in the end (delta: 605.1 kB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-07 01:08:44,488 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 107.0 MB. Free memory was 80.5 MB in the beginning and 80.5 MB in the end (delta: 21.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:08:44,490 INFO L168 Benchmark]: CACSL2BoogieTranslator took 764.46 ms. Allocated memory is still 107.0 MB. Free memory was 67.9 MB in the beginning and 67.6 MB in the end (delta: 244.6 kB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-07 01:08:44,493 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 107.0 MB. Free memory was 80.5 MB in the beginning and 80.5 MB in the end (delta: 21.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 764.46 ms. Allocated memory is still 107.0 MB. Free memory was 67.9 MB in the beginning and 67.6 MB in the end (delta: 244.6 kB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2979]: 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_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/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_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec13_product21.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/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_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/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 bb3dce9b114483214f320874a7aac06c61be45c777f03f63c22a8ddab1e62ece --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:08:46,862 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:08:46,865 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:08:46,920 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:08:46,921 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:08:46,925 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:08:46,927 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:08:46,931 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:08:46,934 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:08:46,942 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:08:46,943 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:08:46,945 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:08:46,945 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:08:46,948 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:08:46,950 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:08:46,954 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:08:46,955 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:08:46,956 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:08:46,958 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:08:46,966 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:08:46,968 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:08:46,969 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:08:46,973 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:08:46,974 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:08:46,983 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:08:46,983 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:08:46,984 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:08:46,986 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:08:46,987 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:08:46,988 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:08:46,988 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:08:46,989 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:08:46,991 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:08:46,992 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:08:46,993 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:08:46,993 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:08:46,994 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:08:46,995 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:08:46,995 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:08:46,996 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:08:46,997 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:08:46,998 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:08:47,038 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:08:47,038 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:08:47,039 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:08:47,040 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:08:47,040 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:08:47,040 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:08:47,040 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:08:47,041 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:08:47,041 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:08:47,042 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:08:47,043 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:08:47,043 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:08:47,044 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:08:47,044 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:08:47,044 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:08:47,044 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:08:47,044 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:08:47,045 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:08:47,045 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:08:47,045 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:08:47,045 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:08:47,046 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:08:47,046 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:08:47,046 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:08:47,046 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:08:47,047 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:08:47,047 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:08:47,047 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:08:47,047 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:08:47,048 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:08:47,048 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:08:47,048 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:08:47,048 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:08:47,048 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:08:47,049 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:08:47,049 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_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bb3dce9b114483214f320874a7aac06c61be45c777f03f63c22a8ddab1e62ece [2021-11-07 01:08:47,394 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:08:47,423 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:08:47,427 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:08:47,429 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:08:47,430 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:08:47,431 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec13_product21.cil.c [2021-11-07 01:08:47,512 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/bin/utaipan-UUZaoUuFF8/data/9a072b6ea/8414fd20f4334ab3a4e7051b25ae5fa3/FLAGdfa4e66f4 [2021-11-07 01:08:48,273 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:08:48,281 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/sv-benchmarks/c/product-lines/elevator_spec13_product21.cil.c [2021-11-07 01:08:48,313 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/bin/utaipan-UUZaoUuFF8/data/9a072b6ea/8414fd20f4334ab3a4e7051b25ae5fa3/FLAGdfa4e66f4 [2021-11-07 01:08:48,417 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/bin/utaipan-UUZaoUuFF8/data/9a072b6ea/8414fd20f4334ab3a4e7051b25ae5fa3 [2021-11-07 01:08:48,421 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:08:48,424 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:08:48,428 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:08:48,428 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:08:48,436 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:08:48,436 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:08:48" (1/1) ... [2021-11-07 01:08:48,438 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a69c62d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:08:48, skipping insertion in model container [2021-11-07 01:08:48,438 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:08:48" (1/1) ... [2021-11-07 01:08:48,445 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:08:48,517 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:08:49,156 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_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/sv-benchmarks/c/product-lines/elevator_spec13_product21.cil.c[58922,58935] [2021-11-07 01:08:49,229 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:08:49,254 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:08:49,280 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:08:49,409 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_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/sv-benchmarks/c/product-lines/elevator_spec13_product21.cil.c[58922,58935] [2021-11-07 01:08:49,430 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:08:49,438 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:08:49,573 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_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/sv-benchmarks/c/product-lines/elevator_spec13_product21.cil.c[58922,58935] [2021-11-07 01:08:49,591 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:08:49,627 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:08:49,628 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:08:49 WrapperNode [2021-11-07 01:08:49,628 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:08:49,629 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:08:49,629 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:08:49,630 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:08:49,637 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:08:49" (1/1) ... [2021-11-07 01:08:49,708 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:08:49" (1/1) ... [2021-11-07 01:08:50,321 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:08:50,323 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:08:50,323 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:08:50,324 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:08:50,354 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:08:49" (1/1) ... [2021-11-07 01:08:50,354 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:08:49" (1/1) ... [2021-11-07 01:08:50,461 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:08:49" (1/1) ... [2021-11-07 01:08:50,462 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:08:49" (1/1) ... [2021-11-07 01:08:50,757 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:08:49" (1/1) ... [2021-11-07 01:08:51,142 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:08:49" (1/1) ... [2021-11-07 01:08:51,182 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:08:49" (1/1) ... [2021-11-07 01:08:51,265 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:08:51,266 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:08:51,276 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:08:51,276 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:08:51,277 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:08:49" (1/1) ... [2021-11-07 01:08:51,284 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:08:51,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:08:51,323 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:08:51,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:08:51,460 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:08:51,461 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:08:51,461 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:08:51,461 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:09:13,664 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:09:13,665 INFO L299 CfgBuilder]: Removed 1891 assume(true) statements. [2021-11-07 01:09:13,676 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:09:13 BoogieIcfgContainer [2021-11-07 01:09:13,677 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:09:13,679 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:09:13,679 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:09:13,683 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:09:13,683 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:08:48" (1/3) ... [2021-11-07 01:09:13,684 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b220d2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:09:13, skipping insertion in model container [2021-11-07 01:09:13,684 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:08:49" (2/3) ... [2021-11-07 01:09:13,685 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b220d2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:09:13, skipping insertion in model container [2021-11-07 01:09:13,685 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:09:13" (3/3) ... [2021-11-07 01:09:13,687 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec13_product21.cil.c [2021-11-07 01:09:13,693 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:09:13,694 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2021-11-07 01:09:13,791 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:09:13,799 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 01:09:13,799 INFO L340 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2021-11-07 01:09:13,983 INFO L276 IsEmpty]: Start isEmpty. Operand has 9051 states, 9040 states have (on average 1.897566371681416) internal successors, (17154), 9050 states have internal predecessors, (17154), 0 states have call successors, (0), 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 01:09:14,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-07 01:09:14,021 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:09:14,029 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 01:09:14,030 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 01:09:14,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:09:14,042 INFO L85 PathProgramCache]: Analyzing trace with hash -185442834, now seen corresponding path program 1 times [2021-11-07 01:09:14,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:09:14,064 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [321845321] [2021-11-07 01:09:14,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:09:14,065 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:09:14,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:09:14,076 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:09:14,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:09:14,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:09:14,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:09:14,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:09:14,973 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 01:09:14,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:09:15,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:15,142 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:09:15,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [321845321] [2021-11-07 01:09:15,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [321845321] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:09:15,144 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:09:15,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:09:15,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097746062] [2021-11-07 01:09:15,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:09:15,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:09:15,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:09:15,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:09:15,202 INFO L87 Difference]: Start difference. First operand has 9051 states, 9040 states have (on average 1.897566371681416) internal successors, (17154), 9050 states have internal predecessors, (17154), 0 states have call successors, (0), 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 28.5) internal successors, (57), 2 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:15,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:09:15,624 INFO L93 Difference]: Finished difference Result 16348 states and 30976 transitions. [2021-11-07 01:09:15,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:09:15,626 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 28.5) internal successors, (57), 2 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-07 01:09:15,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:09:15,737 INFO L225 Difference]: With dead ends: 16348 [2021-11-07 01:09:15,738 INFO L226 Difference]: Without dead ends: 9047 [2021-11-07 01:09:15,765 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 112 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 01:09:15,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9047 states. [2021-11-07 01:09:16,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9047 to 9047. [2021-11-07 01:09:16,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9047 states, 9037 states have (on average 1.8828150935044816) internal successors, (17015), 9046 states have internal predecessors, (17015), 0 states have call successors, (0), 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 01:09:16,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9047 states to 9047 states and 17015 transitions. [2021-11-07 01:09:16,284 INFO L78 Accepts]: Start accepts. Automaton has 9047 states and 17015 transitions. Word has length 57 [2021-11-07 01:09:16,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:09:16,285 INFO L470 AbstractCegarLoop]: Abstraction has 9047 states and 17015 transitions. [2021-11-07 01:09:16,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 28.5) internal successors, (57), 2 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:16,287 INFO L276 IsEmpty]: Start isEmpty. Operand 9047 states and 17015 transitions. [2021-11-07 01:09:16,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-07 01:09:16,297 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:09:16,298 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 01:09:16,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:09:16,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:09:16,522 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 01:09:16,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:09:16,529 INFO L85 PathProgramCache]: Analyzing trace with hash -704329424, now seen corresponding path program 1 times [2021-11-07 01:09:16,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:09:16,535 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [89624213] [2021-11-07 01:09:16,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:09:16,536 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:09:16,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:09:16,537 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:09:16,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:09:16,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:09:16,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:09:16,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:09:17,278 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 01:09:17,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:09:17,474 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 01:09:17,475 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:09:17,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [89624213] [2021-11-07 01:09:17,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [89624213] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:09:17,476 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:09:17,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:09:17,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170203237] [2021-11-07 01:09:17,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:09:17,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:09:17,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:09:17,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:09:17,484 INFO L87 Difference]: Start difference. First operand 9047 states and 17015 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 01:09:18,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:09:18,791 INFO L93 Difference]: Finished difference Result 30692 states and 57725 transitions. [2021-11-07 01:09:18,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:09:18,792 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 57 [2021-11-07 01:09:18,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:09:18,938 INFO L225 Difference]: With dead ends: 30692 [2021-11-07 01:09:18,939 INFO L226 Difference]: Without dead ends: 21653 [2021-11-07 01:09:18,964 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 110 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 01:09:19,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21653 states. [2021-11-07 01:09:19,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21653 to 9043. [2021-11-07 01:09:19,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9043 states, 9033 states have (on average 1.8824310860179343) internal successors, (17004), 9042 states have internal predecessors, (17004), 0 states have call successors, (0), 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 01:09:19,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9043 states to 9043 states and 17004 transitions. [2021-11-07 01:09:19,869 INFO L78 Accepts]: Start accepts. Automaton has 9043 states and 17004 transitions. Word has length 57 [2021-11-07 01:09:19,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:09:19,871 INFO L470 AbstractCegarLoop]: Abstraction has 9043 states and 17004 transitions. [2021-11-07 01:09:19,871 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 01:09:19,872 INFO L276 IsEmpty]: Start isEmpty. Operand 9043 states and 17004 transitions. [2021-11-07 01:09:19,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-07 01:09:19,877 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:09:19,885 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] [2021-11-07 01:09:19,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:09:20,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:09:20,107 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 01:09:20,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:09:20,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1058017694, now seen corresponding path program 1 times [2021-11-07 01:09:20,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:09:20,110 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1089181688] [2021-11-07 01:09:20,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:09:20,110 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:09:20,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:09:20,120 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:09:20,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:09:20,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:09:20,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:09:20,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:09:20,942 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 01:09:20,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:09:21,162 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 01:09:21,162 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:09:21,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1089181688] [2021-11-07 01:09:21,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1089181688] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:09:21,163 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:09:21,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:09:21,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752735937] [2021-11-07 01:09:21,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:09:21,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:09:21,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:09:21,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:09:21,165 INFO L87 Difference]: Start difference. First operand 9043 states and 17004 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:25,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:09:25,746 INFO L93 Difference]: Finished difference Result 62682 states and 117859 transitions. [2021-11-07 01:09:25,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 01:09:25,747 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-07 01:09:25,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:09:25,984 INFO L225 Difference]: With dead ends: 62682 [2021-11-07 01:09:25,984 INFO L226 Difference]: Without dead ends: 53658 [2021-11-07 01:09:26,023 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:09:26,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53658 states. [2021-11-07 01:09:27,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53658 to 9032. [2021-11-07 01:09:27,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9032 states, 9022 states have (on average 1.8802926180447794) internal successors, (16964), 9031 states have internal predecessors, (16964), 0 states have call successors, (0), 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 01:09:27,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9032 states to 9032 states and 16964 transitions. [2021-11-07 01:09:27,189 INFO L78 Accepts]: Start accepts. Automaton has 9032 states and 16964 transitions. Word has length 59 [2021-11-07 01:09:27,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:09:27,190 INFO L470 AbstractCegarLoop]: Abstraction has 9032 states and 16964 transitions. [2021-11-07 01:09:27,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:27,192 INFO L276 IsEmpty]: Start isEmpty. Operand 9032 states and 16964 transitions. [2021-11-07 01:09:27,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 01:09:27,200 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:09:27,200 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:09:27,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:09:27,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:09:27,420 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 01:09:27,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:09:27,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1135228191, now seen corresponding path program 1 times [2021-11-07 01:09:27,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:09:27,423 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1742514098] [2021-11-07 01:09:27,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:09:27,423 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:09:27,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:09:27,425 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:09:27,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:09:27,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:09:28,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:09:28,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:09:28,253 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 01:09:28,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:09:28,509 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 01:09:28,509 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:09:28,509 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1742514098] [2021-11-07 01:09:28,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1742514098] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:09:28,510 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:09:28,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:09:28,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869586079] [2021-11-07 01:09:28,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:09:28,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:09:28,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:09:28,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:09:28,513 INFO L87 Difference]: Start difference. First operand 9032 states and 16964 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 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 01:09:29,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:09:29,936 INFO L93 Difference]: Finished difference Result 30556 states and 57418 transitions. [2021-11-07 01:09:29,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:09:29,937 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 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 64 [2021-11-07 01:09:29,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:09:30,004 INFO L225 Difference]: With dead ends: 30556 [2021-11-07 01:09:30,004 INFO L226 Difference]: Without dead ends: 21539 [2021-11-07 01:09:30,025 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:09:30,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21539 states. [2021-11-07 01:09:30,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21539 to 9028. [2021-11-07 01:09:30,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9028 states, 9018 states have (on average 1.8794632956309603) internal successors, (16949), 9027 states have internal predecessors, (16949), 0 states have call successors, (0), 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 01:09:30,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9028 states to 9028 states and 16949 transitions. [2021-11-07 01:09:30,665 INFO L78 Accepts]: Start accepts. Automaton has 9028 states and 16949 transitions. Word has length 64 [2021-11-07 01:09:30,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:09:30,667 INFO L470 AbstractCegarLoop]: Abstraction has 9028 states and 16949 transitions. [2021-11-07 01:09:30,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 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 01:09:30,667 INFO L276 IsEmpty]: Start isEmpty. Operand 9028 states and 16949 transitions. [2021-11-07 01:09:30,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 01:09:30,674 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:09:30,674 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:09:30,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:09:30,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:09:30,889 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 01:09:30,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:09:30,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1751956663, now seen corresponding path program 1 times [2021-11-07 01:09:30,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:09:30,891 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1064131368] [2021-11-07 01:09:30,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:09:30,891 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:09:30,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:09:30,893 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:09:30,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:09:31,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:09:31,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:09:31,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:09:31,648 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 01:09:31,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:09:31,909 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 01:09:31,910 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:09:31,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1064131368] [2021-11-07 01:09:31,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1064131368] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:09:31,910 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:09:31,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 01:09:31,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592325342] [2021-11-07 01:09:31,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:09:31,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:09:31,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:09:31,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:09:31,913 INFO L87 Difference]: Start difference. First operand 9028 states and 16949 transitions. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:37,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:09:37,642 INFO L93 Difference]: Finished difference Result 98426 states and 185008 transitions. [2021-11-07 01:09:37,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-07 01:09:37,643 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-07 01:09:37,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:09:38,003 INFO L225 Difference]: With dead ends: 98426 [2021-11-07 01:09:38,003 INFO L226 Difference]: Without dead ends: 89418 [2021-11-07 01:09:38,283 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=205, Invalid=497, Unknown=0, NotChecked=0, Total=702 [2021-11-07 01:09:38,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89418 states. [2021-11-07 01:09:39,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89418 to 9041. [2021-11-07 01:09:39,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9041 states, 9031 states have (on average 1.8776436717971432) internal successors, (16957), 9040 states have internal predecessors, (16957), 0 states have call successors, (0), 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 01:09:39,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9041 states to 9041 states and 16957 transitions. [2021-11-07 01:09:39,418 INFO L78 Accepts]: Start accepts. Automaton has 9041 states and 16957 transitions. Word has length 66 [2021-11-07 01:09:39,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:09:39,419 INFO L470 AbstractCegarLoop]: Abstraction has 9041 states and 16957 transitions. [2021-11-07 01:09:39,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:39,419 INFO L276 IsEmpty]: Start isEmpty. Operand 9041 states and 16957 transitions. [2021-11-07 01:09:39,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 01:09:39,427 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:09:39,428 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] [2021-11-07 01:09:39,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:09:39,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:09:39,646 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 01:09:39,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:09:39,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1081944112, now seen corresponding path program 1 times [2021-11-07 01:09:39,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:09:39,648 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1560493715] [2021-11-07 01:09:39,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:09:39,648 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:09:39,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:09:39,650 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:09:39,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:09:40,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:09:40,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:09:40,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:09:40,384 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 01:09:40,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:09:40,583 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 01:09:40,584 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:09:40,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1560493715] [2021-11-07 01:09:40,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1560493715] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:09:40,584 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:09:40,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:09:40,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504445031] [2021-11-07 01:09:40,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:09:40,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:09:40,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:09:40,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:09:40,588 INFO L87 Difference]: Start difference. First operand 9041 states and 16957 transitions. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 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 01:09:43,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:09:43,439 INFO L93 Difference]: Finished difference Result 62668 states and 117739 transitions. [2021-11-07 01:09:43,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 01:09:43,440 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 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 70 [2021-11-07 01:09:43,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:09:43,688 INFO L225 Difference]: With dead ends: 62668 [2021-11-07 01:09:43,689 INFO L226 Difference]: Without dead ends: 53679 [2021-11-07 01:09:43,718 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:09:43,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53679 states. [2021-11-07 01:09:44,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53679 to 9053. [2021-11-07 01:09:44,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9053 states, 9043 states have (on average 1.8764790445648567) internal successors, (16969), 9052 states have internal predecessors, (16969), 0 states have call successors, (0), 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 01:09:44,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9053 states to 9053 states and 16969 transitions. [2021-11-07 01:09:44,799 INFO L78 Accepts]: Start accepts. Automaton has 9053 states and 16969 transitions. Word has length 70 [2021-11-07 01:09:44,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:09:44,799 INFO L470 AbstractCegarLoop]: Abstraction has 9053 states and 16969 transitions. [2021-11-07 01:09:44,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 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 01:09:44,800 INFO L276 IsEmpty]: Start isEmpty. Operand 9053 states and 16969 transitions. [2021-11-07 01:09:44,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 01:09:44,805 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:09:44,806 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] [2021-11-07 01:09:44,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:09:45,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:09:45,021 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 01:09:45,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:09:45,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1323750453, now seen corresponding path program 1 times [2021-11-07 01:09:45,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:09:45,023 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1458699041] [2021-11-07 01:09:45,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:09:45,023 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:09:45,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:09:45,025 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:09:45,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:09:45,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:09:45,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:09:45,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:09:45,840 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 01:09:45,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:09:46,059 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 01:09:46,060 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:09:46,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1458699041] [2021-11-07 01:09:46,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1458699041] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:09:46,060 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:09:46,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:09:46,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886778689] [2021-11-07 01:09:46,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:09:46,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:09:46,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:09:46,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:09:46,063 INFO L87 Difference]: Start difference. First operand 9053 states and 16969 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 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 01:09:46,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:09:46,657 INFO L93 Difference]: Finished difference Result 21630 states and 40594 transitions. [2021-11-07 01:09:46,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:09:46,658 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 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 70 [2021-11-07 01:09:46,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:09:46,682 INFO L225 Difference]: With dead ends: 21630 [2021-11-07 01:09:46,682 INFO L226 Difference]: Without dead ends: 12605 [2021-11-07 01:09:46,700 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 137 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 01:09:46,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12605 states. [2021-11-07 01:09:47,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12605 to 9005. [2021-11-07 01:09:47,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9005 states, 8995 states have (on average 1.877709838799333) internal successors, (16890), 9004 states have internal predecessors, (16890), 0 states have call successors, (0), 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 01:09:47,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9005 states to 9005 states and 16890 transitions. [2021-11-07 01:09:47,422 INFO L78 Accepts]: Start accepts. Automaton has 9005 states and 16890 transitions. Word has length 70 [2021-11-07 01:09:47,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:09:47,423 INFO L470 AbstractCegarLoop]: Abstraction has 9005 states and 16890 transitions. [2021-11-07 01:09:47,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 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 01:09:47,423 INFO L276 IsEmpty]: Start isEmpty. Operand 9005 states and 16890 transitions. [2021-11-07 01:09:47,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 01:09:47,431 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:09:47,432 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:09:47,452 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-07 01:09:47,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:09:47,652 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 01:09:47,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:09:47,653 INFO L85 PathProgramCache]: Analyzing trace with hash 449950784, now seen corresponding path program 1 times [2021-11-07 01:09:47,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:09:47,654 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1641827810] [2021-11-07 01:09:47,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:09:47,654 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:09:47,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:09:47,657 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:09:47,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:09:48,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:09:48,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:09:48,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:09:48,514 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 01:09:48,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:09:48,707 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 01:09:48,708 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:09:48,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1641827810] [2021-11-07 01:09:48,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1641827810] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:09:48,708 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:09:48,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:09:48,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691199157] [2021-11-07 01:09:48,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:09:48,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:09:48,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:09:48,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:09:48,711 INFO L87 Difference]: Start difference. First operand 9005 states and 16890 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:49,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:09:49,334 INFO L93 Difference]: Finished difference Result 21577 states and 40500 transitions. [2021-11-07 01:09:49,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:09:49,334 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-07 01:09:49,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:09:49,355 INFO L225 Difference]: With dead ends: 21577 [2021-11-07 01:09:49,355 INFO L226 Difference]: Without dead ends: 12603 [2021-11-07 01:09:49,368 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 138 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 01:09:49,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12603 states. [2021-11-07 01:09:50,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12603 to 9002. [2021-11-07 01:09:50,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9002 states, 8992 states have (on average 1.8768905693950177) internal successors, (16877), 9001 states have internal predecessors, (16877), 0 states have call successors, (0), 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 01:09:50,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9002 states to 9002 states and 16877 transitions. [2021-11-07 01:09:50,136 INFO L78 Accepts]: Start accepts. Automaton has 9002 states and 16877 transitions. Word has length 71 [2021-11-07 01:09:50,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:09:50,136 INFO L470 AbstractCegarLoop]: Abstraction has 9002 states and 16877 transitions. [2021-11-07 01:09:50,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:50,137 INFO L276 IsEmpty]: Start isEmpty. Operand 9002 states and 16877 transitions. [2021-11-07 01:09:50,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 01:09:50,144 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:09:50,144 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:09:50,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:09:50,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:09:50,355 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 01:09:50,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:09:50,355 INFO L85 PathProgramCache]: Analyzing trace with hash 34746602, now seen corresponding path program 1 times [2021-11-07 01:09:50,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:09:50,356 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1526578061] [2021-11-07 01:09:50,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:09:50,356 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:09:50,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:09:50,358 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:09:50,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:09:50,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:09:50,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:09:50,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:09:51,243 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 01:09:51,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:09:51,466 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 01:09:51,466 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:09:51,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1526578061] [2021-11-07 01:09:51,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1526578061] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:09:51,467 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:09:51,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 01:09:51,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197648279] [2021-11-07 01:09:51,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:09:51,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:09:51,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:09:51,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:09:51,470 INFO L87 Difference]: Start difference. First operand 9002 states and 16877 transitions. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 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 01:09:54,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:09:54,147 INFO L93 Difference]: Finished difference Result 50315 states and 94475 transitions. [2021-11-07 01:09:54,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 01:09:54,148 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 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 72 [2021-11-07 01:09:54,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:09:54,210 INFO L225 Difference]: With dead ends: 50315 [2021-11-07 01:09:54,210 INFO L226 Difference]: Without dead ends: 41348 [2021-11-07 01:09:54,223 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2021-11-07 01:09:54,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41348 states. [2021-11-07 01:09:55,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41348 to 9007. [2021-11-07 01:09:55,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9007 states, 8997 states have (on average 1.8759586528842949) internal successors, (16878), 9006 states have internal predecessors, (16878), 0 states have call successors, (0), 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 01:09:55,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9007 states to 9007 states and 16878 transitions. [2021-11-07 01:09:55,197 INFO L78 Accepts]: Start accepts. Automaton has 9007 states and 16878 transitions. Word has length 72 [2021-11-07 01:09:55,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:09:55,197 INFO L470 AbstractCegarLoop]: Abstraction has 9007 states and 16878 transitions. [2021-11-07 01:09:55,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 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 01:09:55,198 INFO L276 IsEmpty]: Start isEmpty. Operand 9007 states and 16878 transitions. [2021-11-07 01:09:55,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 01:09:55,204 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:09:55,204 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:09:55,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:09:55,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:09:55,418 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 01:09:55,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:09:55,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1329810693, now seen corresponding path program 1 times [2021-11-07 01:09:55,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:09:55,420 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [450722378] [2021-11-07 01:09:55,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:09:55,420 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:09:55,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:09:55,422 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:09:55,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:09:56,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:09:56,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:09:56,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:09:56,734 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 01:09:56,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:09:58,500 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 01:09:58,500 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:09:58,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [450722378] [2021-11-07 01:09:58,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [450722378] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:09:58,501 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:09:58,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-07 01:09:58,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205157354] [2021-11-07 01:09:58,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:09:58,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:09:58,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:09:58,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:09:58,502 INFO L87 Difference]: Start difference. First operand 9007 states and 16878 transitions. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 5 states have internal predecessors, (112), 0 states have call successors, (0), 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 01:10:04,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:04,709 INFO L93 Difference]: Finished difference Result 33163 states and 62230 transitions. [2021-11-07 01:10:04,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:10:04,710 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 5 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-07 01:10:04,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:04,743 INFO L225 Difference]: With dead ends: 33163 [2021-11-07 01:10:04,744 INFO L226 Difference]: Without dead ends: 24210 [2021-11-07 01:10:04,750 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 140 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 01:10:04,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24210 states. [2021-11-07 01:10:05,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24210 to 14606. [2021-11-07 01:10:05,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14606 states, 14596 states have (on average 1.8732529460126062) internal successors, (27342), 14605 states have internal predecessors, (27342), 0 states have call successors, (0), 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 01:10:05,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14606 states to 14606 states and 27342 transitions. [2021-11-07 01:10:05,660 INFO L78 Accepts]: Start accepts. Automaton has 14606 states and 27342 transitions. Word has length 73 [2021-11-07 01:10:05,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:05,661 INFO L470 AbstractCegarLoop]: Abstraction has 14606 states and 27342 transitions. [2021-11-07 01:10:05,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 5 states have internal predecessors, (112), 0 states have call successors, (0), 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 01:10:05,661 INFO L276 IsEmpty]: Start isEmpty. Operand 14606 states and 27342 transitions. [2021-11-07 01:10:05,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 01:10:05,666 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:05,667 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:10:05,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:10:05,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:10:05,881 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 01:10:05,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:05,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1763905689, now seen corresponding path program 1 times [2021-11-07 01:10:05,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:10:05,882 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1506884680] [2021-11-07 01:10:05,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:05,882 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:10:05,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:10:05,883 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:10:05,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:10:06,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:06,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:10:06,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:06,873 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 01:10:06,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:07,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:07,155 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:07,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1506884680] [2021-11-07 01:10:07,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1506884680] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:07,156 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:07,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:10:07,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238773935] [2021-11-07 01:10:07,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:10:07,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:10:07,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:10:07,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:10:07,158 INFO L87 Difference]: Start difference. First operand 14606 states and 27342 transitions. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 4 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 01:10:24,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:24,554 INFO L93 Difference]: Finished difference Result 84916 states and 158086 transitions. [2021-11-07 01:10:24,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:10:24,555 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 4 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 74 [2021-11-07 01:10:24,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:24,721 INFO L225 Difference]: With dead ends: 84916 [2021-11-07 01:10:24,722 INFO L226 Difference]: Without dead ends: 70363 [2021-11-07 01:10:24,744 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 143 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 01:10:24,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70363 states. [2021-11-07 01:10:26,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70363 to 20782. [2021-11-07 01:10:26,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20782 states, 20772 states have (on average 1.8736761024456) internal successors, (38920), 20781 states have internal predecessors, (38920), 0 states have call successors, (0), 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 01:10:26,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20782 states to 20782 states and 38920 transitions. [2021-11-07 01:10:26,740 INFO L78 Accepts]: Start accepts. Automaton has 20782 states and 38920 transitions. Word has length 74 [2021-11-07 01:10:26,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:26,740 INFO L470 AbstractCegarLoop]: Abstraction has 20782 states and 38920 transitions. [2021-11-07 01:10:26,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 4 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 01:10:26,741 INFO L276 IsEmpty]: Start isEmpty. Operand 20782 states and 38920 transitions. [2021-11-07 01:10:26,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 01:10:26,746 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:26,746 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:10:26,761 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-11-07 01:10:26,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:10:26,949 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 01:10:26,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:26,950 INFO L85 PathProgramCache]: Analyzing trace with hash 379802179, now seen corresponding path program 1 times [2021-11-07 01:10:26,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:10:26,951 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1466551643] [2021-11-07 01:10:26,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:26,951 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:10:26,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:10:26,952 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:10:26,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:10:27,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:27,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:10:27,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:28,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:28,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:28,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:28,316 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:28,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1466551643] [2021-11-07 01:10:28,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1466551643] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:28,317 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:28,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 01:10:28,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79181159] [2021-11-07 01:10:28,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:10:28,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:10:28,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:10:28,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:10:28,319 INFO L87 Difference]: Start difference. First operand 20782 states and 38920 transitions. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:51,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:51,448 INFO L93 Difference]: Finished difference Result 74882 states and 139975 transitions. [2021-11-07 01:10:51,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:10:51,449 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-07 01:10:51,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:51,559 INFO L225 Difference]: With dead ends: 74882 [2021-11-07 01:10:51,559 INFO L226 Difference]: Without dead ends: 55795 [2021-11-07 01:10:51,583 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:10:51,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55795 states. [2021-11-07 01:10:54,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55795 to 35833. [2021-11-07 01:10:54,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35833 states, 35823 states have (on average 1.8658962119308824) internal successors, (66842), 35832 states have internal predecessors, (66842), 0 states have call successors, (0), 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 01:10:54,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35833 states to 35833 states and 66842 transitions. [2021-11-07 01:10:54,546 INFO L78 Accepts]: Start accepts. Automaton has 35833 states and 66842 transitions. Word has length 75 [2021-11-07 01:10:54,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:54,547 INFO L470 AbstractCegarLoop]: Abstraction has 35833 states and 66842 transitions. [2021-11-07 01:10:54,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:54,547 INFO L276 IsEmpty]: Start isEmpty. Operand 35833 states and 66842 transitions. [2021-11-07 01:10:54,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 01:10:54,556 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:54,556 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:10:54,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:10:54,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:10:54,773 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 01:10:54,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:54,774 INFO L85 PathProgramCache]: Analyzing trace with hash -826611792, now seen corresponding path program 1 times [2021-11-07 01:10:54,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:10:54,775 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [683358271] [2021-11-07 01:10:54,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:54,776 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:10:54,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:10:54,777 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:10:54,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:10:55,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:55,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:10:55,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:55,914 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 01:10:55,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:56,203 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 01:10:56,204 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:56,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [683358271] [2021-11-07 01:10:56,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [683358271] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:56,204 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:56,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:10:56,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232720395] [2021-11-07 01:10:56,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:10:56,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:10:56,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:10:56,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:10:56,206 INFO L87 Difference]: Start difference. First operand 35833 states and 66842 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:12,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:12,167 INFO L93 Difference]: Finished difference Result 99749 states and 185186 transitions. [2021-11-07 01:11:12,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:11:12,169 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-07 01:11:12,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:12,321 INFO L225 Difference]: With dead ends: 99749 [2021-11-07 01:11:12,321 INFO L226 Difference]: Without dead ends: 65962 [2021-11-07 01:11:12,352 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 148 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 01:11:12,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65962 states. [2021-11-07 01:11:16,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65962 to 45323. [2021-11-07 01:11:16,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45323 states, 45313 states have (on average 1.839074879173747) internal successors, (83334), 45322 states have internal predecessors, (83334), 0 states have call successors, (0), 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 01:11:16,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45323 states to 45323 states and 83334 transitions. [2021-11-07 01:11:16,172 INFO L78 Accepts]: Start accepts. Automaton has 45323 states and 83334 transitions. Word has length 76 [2021-11-07 01:11:16,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:16,172 INFO L470 AbstractCegarLoop]: Abstraction has 45323 states and 83334 transitions. [2021-11-07 01:11:16,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:16,173 INFO L276 IsEmpty]: Start isEmpty. Operand 45323 states and 83334 transitions. [2021-11-07 01:11:16,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 01:11:16,176 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:16,176 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:11:16,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:11:16,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:11:16,379 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 01:11:16,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:16,380 INFO L85 PathProgramCache]: Analyzing trace with hash 677162203, now seen corresponding path program 1 times [2021-11-07 01:11:16,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:16,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [963415865] [2021-11-07 01:11:16,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:16,381 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:16,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:16,383 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:16,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30aeb415-98e5-4700-a6d4-cb1046bc5b4f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:11:17,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:17,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:11:17,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:17,604 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 01:11:17,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:17,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:17,883 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:17,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [963415865] [2021-11-07 01:11:17,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [963415865] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:17,883 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:11:17,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:11:17,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470446018] [2021-11-07 01:11:17,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:11:17,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:11:17,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:11:17,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:11:17,886 INFO L87 Difference]: Start difference. First operand 45323 states and 83334 transitions. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)