./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product11.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_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/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_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product11.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/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_a08d7e98-efb1-4e8a-93e4-3518e1070774/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 8e809cb7921b0f8738511433928ba20d09f78a0d0fe23412d97e6052fa9e13ec --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:52:14,592 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:52:14,595 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:52:14,628 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:52:14,629 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:52:14,631 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:52:14,632 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:52:14,635 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:52:14,637 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:52:14,638 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:52:14,639 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:52:14,641 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:52:14,641 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:52:14,643 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:52:14,645 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:52:14,646 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:52:14,648 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:52:14,649 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:52:14,651 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:52:14,654 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:52:14,656 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:52:14,663 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:52:14,664 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:52:14,665 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:52:14,669 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:52:14,670 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:52:14,670 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:52:14,671 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:52:14,672 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:52:14,673 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:52:14,674 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:52:14,680 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:52:14,682 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:52:14,683 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:52:14,685 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:52:14,685 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:52:14,686 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:52:14,686 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:52:14,687 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:52:14,688 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:52:14,688 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:52:14,689 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:52:14,735 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:52:14,735 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:52:14,736 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:52:14,736 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:52:14,736 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:52:14,736 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:52:14,736 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:52:14,736 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:52:14,736 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:52:14,736 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:52:14,737 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:52:14,737 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:52:14,737 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:52:14,737 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:52:14,737 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:52:14,738 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:52:14,738 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:52:14,739 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:52:14,739 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:52:14,739 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:52:14,739 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:52:14,739 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:52:14,740 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:52:14,740 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:52:14,740 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:52:14,740 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:52:14,740 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:52:14,740 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:52:14,741 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:52:14,741 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:52:14,741 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:52:14,741 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:52:14,742 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:52:14,742 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:52:14,742 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:52:14,742 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:52:14,742 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:52:14,743 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:52:14,743 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:52:14,743 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_a08d7e98-efb1-4e8a-93e4-3518e1070774/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8e809cb7921b0f8738511433928ba20d09f78a0d0fe23412d97e6052fa9e13ec [2021-11-07 01:52:15,015 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:52:15,051 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:52:15,053 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:52:15,053 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:52:15,055 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:52:15,056 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec2_product11.cil.c [2021-11-07 01:52:15,129 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/data/bc292c465/fa3422e64b8a471ba6f9f4c020d156f2/FLAG2b2bde85f [2021-11-07 01:52:15,702 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:52:15,703 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/sv-benchmarks/c/product-lines/elevator_spec2_product11.cil.c [2021-11-07 01:52:15,736 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/data/bc292c465/fa3422e64b8a471ba6f9f4c020d156f2/FLAG2b2bde85f [2021-11-07 01:52:15,936 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/data/bc292c465/fa3422e64b8a471ba6f9f4c020d156f2 [2021-11-07 01:52:15,938 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:52:15,939 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:52:15,944 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:52:15,945 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:52:15,959 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:52:15,959 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:52:15" (1/1) ... [2021-11-07 01:52:15,960 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@614415d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:52:15, skipping insertion in model container [2021-11-07 01:52:15,961 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:52:15" (1/1) ... [2021-11-07 01:52:15,966 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:52:16,045 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:52:16,234 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_a08d7e98-efb1-4e8a-93e4-3518e1070774/sv-benchmarks/c/product-lines/elevator_spec2_product11.cil.c[1545,1558] [2021-11-07 01:52:16,698 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:52:16,714 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 01:52:16,715 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@95e12d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:52:16, skipping insertion in model container [2021-11-07 01:52:16,715 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:52:16,715 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:52:16,718 INFO L168 Benchmark]: Toolchain (without parser) took 777.17 ms. Allocated memory was 86.0 MB in the beginning and 109.1 MB in the end (delta: 23.1 MB). Free memory was 43.7 MB in the beginning and 67.8 MB in the end (delta: -24.1 MB). Peak memory consumption was 5.0 MB. Max. memory is 16.1 GB. [2021-11-07 01:52:16,720 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 86.0 MB. Free memory is still 62.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:52:16,722 INFO L168 Benchmark]: CACSL2BoogieTranslator took 771.19 ms. Allocated memory was 86.0 MB in the beginning and 109.1 MB in the end (delta: 23.1 MB). Free memory was 43.5 MB in the beginning and 67.8 MB in the end (delta: -24.3 MB). Peak memory consumption was 5.0 MB. Max. memory is 16.1 GB. [2021-11-07 01:52:16,724 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 86.0 MB. Free memory is still 62.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 771.19 ms. Allocated memory was 86.0 MB in the beginning and 109.1 MB in the end (delta: 23.1 MB). Free memory was 43.5 MB in the beginning and 67.8 MB in the end (delta: -24.3 MB). Peak memory consumption was 5.0 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 570]: 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_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/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_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product11.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/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_a08d7e98-efb1-4e8a-93e4-3518e1070774/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 8e809cb7921b0f8738511433928ba20d09f78a0d0fe23412d97e6052fa9e13ec --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:52:18,872 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:52:18,875 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:52:18,916 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:52:18,917 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:52:18,921 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:52:18,923 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:52:18,931 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:52:18,934 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:52:18,942 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:52:18,943 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:52:18,945 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:52:18,945 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:52:18,948 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:52:18,951 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:52:18,956 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:52:18,957 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:52:18,958 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:52:18,960 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:52:18,962 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:52:18,964 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:52:18,967 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:52:18,969 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:52:18,972 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:52:18,985 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:52:18,986 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:52:18,986 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:52:18,988 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:52:18,988 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:52:18,989 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:52:18,990 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:52:18,991 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:52:18,993 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:52:18,994 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:52:18,995 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:52:18,995 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:52:18,996 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:52:18,996 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:52:19,009 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:52:19,011 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:52:19,012 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:52:19,013 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:52:19,060 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:52:19,061 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:52:19,062 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:52:19,062 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:52:19,063 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:52:19,063 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:52:19,063 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:52:19,063 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:52:19,064 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:52:19,065 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:52:19,066 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:52:19,066 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:52:19,066 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:52:19,067 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:52:19,067 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:52:19,067 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:52:19,067 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:52:19,068 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:52:19,068 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:52:19,068 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:52:19,068 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:52:19,069 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:52:19,069 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:52:19,069 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:52:19,069 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:52:19,070 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:52:19,070 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:52:19,070 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:52:19,070 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:52:19,071 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:52:19,071 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:52:19,071 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:52:19,071 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:52:19,072 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:52:19,072 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:52:19,072 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_a08d7e98-efb1-4e8a-93e4-3518e1070774/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8e809cb7921b0f8738511433928ba20d09f78a0d0fe23412d97e6052fa9e13ec [2021-11-07 01:52:19,466 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:52:19,486 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:52:19,488 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:52:19,489 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:52:19,490 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:52:19,491 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec2_product11.cil.c [2021-11-07 01:52:19,558 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/data/a489affb1/bb22343c55f745c5adcef85454fbecea/FLAG296913e76 [2021-11-07 01:52:20,247 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:52:20,247 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/sv-benchmarks/c/product-lines/elevator_spec2_product11.cil.c [2021-11-07 01:52:20,285 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/data/a489affb1/bb22343c55f745c5adcef85454fbecea/FLAG296913e76 [2021-11-07 01:52:20,430 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/data/a489affb1/bb22343c55f745c5adcef85454fbecea [2021-11-07 01:52:20,439 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:52:20,440 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:52:20,444 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:52:20,445 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:52:20,448 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:52:20,448 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:52:20" (1/1) ... [2021-11-07 01:52:20,451 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46178def and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:52:20, skipping insertion in model container [2021-11-07 01:52:20,451 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:52:20" (1/1) ... [2021-11-07 01:52:20,458 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:52:20,576 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:52:20,715 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_a08d7e98-efb1-4e8a-93e4-3518e1070774/sv-benchmarks/c/product-lines/elevator_spec2_product11.cil.c[1545,1558] [2021-11-07 01:52:21,143 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:52:21,169 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:52:21,196 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:52:21,216 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_a08d7e98-efb1-4e8a-93e4-3518e1070774/sv-benchmarks/c/product-lines/elevator_spec2_product11.cil.c[1545,1558] [2021-11-07 01:52:21,340 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:52:21,353 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:52:21,365 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_a08d7e98-efb1-4e8a-93e4-3518e1070774/sv-benchmarks/c/product-lines/elevator_spec2_product11.cil.c[1545,1558] [2021-11-07 01:52:21,502 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:52:21,540 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:52:21,541 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:52:21 WrapperNode [2021-11-07 01:52:21,541 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:52:21,542 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:52:21,543 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:52:21,543 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:52:21,550 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:52:21" (1/1) ... [2021-11-07 01:52:21,604 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:52:21" (1/1) ... [2021-11-07 01:52:21,830 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:52:21,831 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:52:21,831 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:52:21,831 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:52:21,840 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:52:21" (1/1) ... [2021-11-07 01:52:21,840 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:52:21" (1/1) ... [2021-11-07 01:52:21,856 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:52:21" (1/1) ... [2021-11-07 01:52:21,856 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:52:21" (1/1) ... [2021-11-07 01:52:21,938 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:52:21" (1/1) ... [2021-11-07 01:52:22,023 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:52:21" (1/1) ... [2021-11-07 01:52:22,045 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:52:21" (1/1) ... [2021-11-07 01:52:22,064 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:52:22,065 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:52:22,065 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:52:22,065 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:52:22,066 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:52:21" (1/1) ... [2021-11-07 01:52:22,072 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:52:22,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:52:22,096 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:52:22,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:52:22,142 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:52:22,142 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:52:22,143 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:52:22,143 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:52:30,180 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:52:30,181 INFO L299 CfgBuilder]: Removed 565 assume(true) statements. [2021-11-07 01:52:30,187 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:52:30 BoogieIcfgContainer [2021-11-07 01:52:30,188 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:52:30,191 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:52:30,191 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:52:30,195 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:52:30,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:52:20" (1/3) ... [2021-11-07 01:52:30,196 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ace10a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:52:30, skipping insertion in model container [2021-11-07 01:52:30,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:52:21" (2/3) ... [2021-11-07 01:52:30,197 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ace10a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:52:30, skipping insertion in model container [2021-11-07 01:52:30,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:52:30" (3/3) ... [2021-11-07 01:52:30,198 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product11.cil.c [2021-11-07 01:52:30,203 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:52:30,204 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-11-07 01:52:30,276 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:52:30,284 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 01:52:30,284 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-07 01:52:30,348 INFO L276 IsEmpty]: Start isEmpty. Operand has 2412 states, 2406 states have (on average 1.8931837073981712) internal successors, (4555), 2411 states have internal predecessors, (4555), 0 states have call successors, (0), 0 states 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 01:52:30,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 01:52:30,390 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:52:30,391 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:52:30,391 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:52:30,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:52:30,397 INFO L85 PathProgramCache]: Analyzing trace with hash -290760884, now seen corresponding path program 1 times [2021-11-07 01:52:30,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:52:30,414 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1274292610] [2021-11-07 01:52:30,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:52:30,415 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:52:30,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:52:30,419 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:52:30,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:52:30,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:52:30,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:52:30,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:52:30,982 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 01:52:30,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:52:31,089 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 01:52:31,090 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:52:31,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1274292610] [2021-11-07 01:52:31,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1274292610] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:52:31,091 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:52:31,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:52:31,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949256145] [2021-11-07 01:52:31,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:52:31,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:52:31,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:52:31,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:52:31,120 INFO L87 Difference]: Start difference. First operand has 2412 states, 2406 states have (on average 1.8931837073981712) internal successors, (4555), 2411 states have internal predecessors, (4555), 0 states have call successors, (0), 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 22.0) internal successors, (44), 2 states have internal predecessors, (44), 0 states have call successors, (0), 0 states 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 01:52:31,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:52:31,243 INFO L93 Difference]: Finished difference Result 2431 states and 4578 transitions. [2021-11-07 01:52:31,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:52:31,245 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 22.0) internal successors, (44), 2 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-07 01:52:31,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:52:31,285 INFO L225 Difference]: With dead ends: 2431 [2021-11-07 01:52:31,285 INFO L226 Difference]: Without dead ends: 2408 [2021-11-07 01:52:31,290 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 86 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 01:52:31,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2408 states. [2021-11-07 01:52:31,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2408 to 2408. [2021-11-07 01:52:31,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2408 states, 2403 states have (on average 1.8905534748231378) internal successors, (4543), 2407 states have internal predecessors, (4543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:52:31,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2408 states to 2408 states and 4543 transitions. [2021-11-07 01:52:31,472 INFO L78 Accepts]: Start accepts. Automaton has 2408 states and 4543 transitions. Word has length 44 [2021-11-07 01:52:31,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:52:31,473 INFO L470 AbstractCegarLoop]: Abstraction has 2408 states and 4543 transitions. [2021-11-07 01:52:31,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 22.0) internal successors, (44), 2 states have internal predecessors, (44), 0 states have call successors, (0), 0 states 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 01:52:31,473 INFO L276 IsEmpty]: Start isEmpty. Operand 2408 states and 4543 transitions. [2021-11-07 01:52:31,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-07 01:52:31,479 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:52:31,480 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:52:31,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:52:31,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:52:31,694 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:52:31,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:52:31,695 INFO L85 PathProgramCache]: Analyzing trace with hash -422993381, now seen corresponding path program 1 times [2021-11-07 01:52:31,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:52:31,696 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1227209111] [2021-11-07 01:52:31,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:52:31,696 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:52:31,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:52:31,698 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:52:31,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:52:32,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:52:32,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:52:32,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:52:32,229 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 01:52:32,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:52:32,399 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 01:52:32,400 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:52:32,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1227209111] [2021-11-07 01:52:32,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1227209111] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:52:32,400 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:52:32,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:52:32,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505389001] [2021-11-07 01:52:32,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:52:32,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:52:32,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:52:32,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:52:32,406 INFO L87 Difference]: Start difference. First operand 2408 states and 4543 transitions. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states 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 01:52:32,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:52:32,605 INFO L93 Difference]: Finished difference Result 4803 states and 9067 transitions. [2021-11-07 01:52:32,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:52:32,606 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-07 01:52:32,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:52:32,622 INFO L225 Difference]: With dead ends: 4803 [2021-11-07 01:52:32,622 INFO L226 Difference]: Without dead ends: 2408 [2021-11-07 01:52:32,637 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:52:32,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2408 states. [2021-11-07 01:52:32,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2408 to 2408. [2021-11-07 01:52:32,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2408 states, 2403 states have (on average 1.8880565959217646) internal successors, (4537), 2407 states have internal predecessors, (4537), 0 states have call successors, (0), 0 states 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 01:52:32,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2408 states to 2408 states and 4537 transitions. [2021-11-07 01:52:32,727 INFO L78 Accepts]: Start accepts. Automaton has 2408 states and 4537 transitions. Word has length 46 [2021-11-07 01:52:32,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:52:32,728 INFO L470 AbstractCegarLoop]: Abstraction has 2408 states and 4537 transitions. [2021-11-07 01:52:32,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states 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 01:52:32,729 INFO L276 IsEmpty]: Start isEmpty. Operand 2408 states and 4537 transitions. [2021-11-07 01:52:32,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-07 01:52:32,737 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:52:32,745 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:52:32,763 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-07 01:52:32,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:52:32,959 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:52:32,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:52:32,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1144028709, now seen corresponding path program 1 times [2021-11-07 01:52:32,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:52:32,961 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1290885318] [2021-11-07 01:52:32,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:52:32,961 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:52:32,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:52:32,963 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:52:33,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:52:33,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:52:33,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:52:33,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:52:33,459 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 01:52:33,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:52:33,628 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 01:52:33,631 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:52:33,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1290885318] [2021-11-07 01:52:33,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1290885318] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:52:33,632 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:52:33,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:52:33,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830773614] [2021-11-07 01:52:33,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:52:33,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:52:33,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:52:33,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:52:33,640 INFO L87 Difference]: Start difference. First operand 2408 states and 4537 transitions. Second operand has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:52:33,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:52:33,861 INFO L93 Difference]: Finished difference Result 4767 states and 8990 transitions. [2021-11-07 01:52:33,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:52:33,862 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-07 01:52:33,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:52:33,878 INFO L225 Difference]: With dead ends: 4767 [2021-11-07 01:52:33,878 INFO L226 Difference]: Without dead ends: 2381 [2021-11-07 01:52:33,884 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:52:33,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2381 states. [2021-11-07 01:52:33,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2381 to 2381. [2021-11-07 01:52:33,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2381 states, 2376 states have (on average 1.885942760942761) internal successors, (4481), 2380 states have internal predecessors, (4481), 0 states have call successors, (0), 0 states 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 01:52:33,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2381 states to 2381 states and 4481 transitions. [2021-11-07 01:52:33,972 INFO L78 Accepts]: Start accepts. Automaton has 2381 states and 4481 transitions. Word has length 51 [2021-11-07 01:52:33,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:52:33,973 INFO L470 AbstractCegarLoop]: Abstraction has 2381 states and 4481 transitions. [2021-11-07 01:52:33,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:52:33,975 INFO L276 IsEmpty]: Start isEmpty. Operand 2381 states and 4481 transitions. [2021-11-07 01:52:33,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 01:52:33,978 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:52:33,978 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:52:33,998 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:52:34,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:52:34,196 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:52:34,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:52:34,197 INFO L85 PathProgramCache]: Analyzing trace with hash 832146375, now seen corresponding path program 1 times [2021-11-07 01:52:34,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:52:34,198 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [903021720] [2021-11-07 01:52:34,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:52:34,198 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:52:34,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:52:34,199 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:52:34,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:52:34,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:52:34,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:52:34,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:52:34,683 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 01:52:34,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:52:34,819 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 01:52:34,819 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:52:34,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [903021720] [2021-11-07 01:52:34,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [903021720] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:52:34,820 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:52:34,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:52:34,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184092192] [2021-11-07 01:52:34,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:52:34,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:52:34,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:52:34,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:52:34,822 INFO L87 Difference]: Start difference. First operand 2381 states and 4481 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states 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 01:52:34,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:52:34,987 INFO L93 Difference]: Finished difference Result 4740 states and 8934 transitions. [2021-11-07 01:52:34,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:52:34,988 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-07 01:52:34,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:52:35,003 INFO L225 Difference]: With dead ends: 4740 [2021-11-07 01:52:35,003 INFO L226 Difference]: Without dead ends: 2381 [2021-11-07 01:52:35,006 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 100 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 01:52:35,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2381 states. [2021-11-07 01:52:35,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2381 to 2381. [2021-11-07 01:52:35,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2381 states, 2376 states have (on average 1.8834175084175084) internal successors, (4475), 2380 states have internal predecessors, (4475), 0 states have call successors, (0), 0 states 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 01:52:35,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2381 states to 2381 states and 4475 transitions. [2021-11-07 01:52:35,107 INFO L78 Accepts]: Start accepts. Automaton has 2381 states and 4475 transitions. Word has length 52 [2021-11-07 01:52:35,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:52:35,108 INFO L470 AbstractCegarLoop]: Abstraction has 2381 states and 4475 transitions. [2021-11-07 01:52:35,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states 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 01:52:35,109 INFO L276 IsEmpty]: Start isEmpty. Operand 2381 states and 4475 transitions. [2021-11-07 01:52:35,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-07 01:52:35,111 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:52:35,112 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 01:52:35,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:52:35,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:52:35,325 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:52:35,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:52:35,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1215993560, now seen corresponding path program 1 times [2021-11-07 01:52:35,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:52:35,327 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1882047664] [2021-11-07 01:52:35,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:52:35,327 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:52:35,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:52:35,328 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:52:35,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:52:35,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:52:35,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:52:35,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:52:35,906 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 01:52:35,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:52:36,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:52:36,078 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:52:36,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1882047664] [2021-11-07 01:52:36,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1882047664] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:52:36,079 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:52:36,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 01:52:36,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644996469] [2021-11-07 01:52:36,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:52:36,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:52:36,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:52:36,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:52:36,080 INFO L87 Difference]: Start difference. First operand 2381 states and 4475 transitions. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states 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 01:52:36,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:52:36,302 INFO L93 Difference]: Finished difference Result 4734 states and 8917 transitions. [2021-11-07 01:52:36,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:52:36,303 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 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 01:52:36,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:52:36,318 INFO L225 Difference]: With dead ends: 4734 [2021-11-07 01:52:36,318 INFO L226 Difference]: Without dead ends: 2378 [2021-11-07 01:52:36,322 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:52:36,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2378 states. [2021-11-07 01:52:36,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2378 to 2378. [2021-11-07 01:52:36,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2378 states, 2373 states have (on average 1.8824273072060682) internal successors, (4467), 2377 states have internal predecessors, (4467), 0 states have call successors, (0), 0 states 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 01:52:36,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2378 states to 2378 states and 4467 transitions. [2021-11-07 01:52:36,434 INFO L78 Accepts]: Start accepts. Automaton has 2378 states and 4467 transitions. Word has length 57 [2021-11-07 01:52:36,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:52:36,434 INFO L470 AbstractCegarLoop]: Abstraction has 2378 states and 4467 transitions. [2021-11-07 01:52:36,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states 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 01:52:36,435 INFO L276 IsEmpty]: Start isEmpty. Operand 2378 states and 4467 transitions. [2021-11-07 01:52:36,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 01:52:36,437 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:52:36,438 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:52:36,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:52:36,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:52:36,652 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:52:36,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:52:36,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1756855464, now seen corresponding path program 1 times [2021-11-07 01:52:36,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:52:36,653 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [811011016] [2021-11-07 01:52:36,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:52:36,654 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:52:36,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:52:36,655 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:52:36,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:52:37,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:52:37,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:52:37,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:52:37,285 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 01:52:37,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:52:37,459 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 01:52:37,459 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:52:37,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [811011016] [2021-11-07 01:52:37,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [811011016] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:52:37,459 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:52:37,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-07 01:52:37,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918094221] [2021-11-07 01:52:37,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:52:37,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:52:37,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:52:37,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:52:37,461 INFO L87 Difference]: Start difference. First operand 2378 states and 4467 transitions. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:52:39,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:52:39,068 INFO L93 Difference]: Finished difference Result 8668 states and 16347 transitions. [2021-11-07 01:52:39,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:52:39,069 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-07 01:52:39,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:52:39,110 INFO L225 Difference]: With dead ends: 8668 [2021-11-07 01:52:39,110 INFO L226 Difference]: Without dead ends: 6321 [2021-11-07 01:52:39,115 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:52:39,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6321 states. [2021-11-07 01:52:39,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6321 to 2378. [2021-11-07 01:52:39,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2378 states, 2373 states have (on average 1.8394437420986094) internal successors, (4365), 2377 states have internal predecessors, (4365), 0 states have call successors, (0), 0 states 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 01:52:39,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2378 states to 2378 states and 4365 transitions. [2021-11-07 01:52:39,268 INFO L78 Accepts]: Start accepts. Automaton has 2378 states and 4365 transitions. Word has length 58 [2021-11-07 01:52:39,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:52:39,269 INFO L470 AbstractCegarLoop]: Abstraction has 2378 states and 4365 transitions. [2021-11-07 01:52:39,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:52:39,269 INFO L276 IsEmpty]: Start isEmpty. Operand 2378 states and 4365 transitions. [2021-11-07 01:52:39,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 01:52:39,272 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:52:39,272 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:52:39,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:52:39,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:52:39,489 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:52:39,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:52:39,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1621494380, now seen corresponding path program 1 times [2021-11-07 01:52:39,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:52:39,491 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [867069425] [2021-11-07 01:52:39,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:52:39,491 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:52:39,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:52:39,494 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:52:39,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:52:39,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:52:39,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:52:39,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:52:40,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:52:40,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:52:40,392 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 01:52:40,392 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:52:40,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [867069425] [2021-11-07 01:52:40,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [867069425] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:52:40,393 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:52:40,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 01:52:40,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354815799] [2021-11-07 01:52:40,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:52:40,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:52:40,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:52:40,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:52:40,394 INFO L87 Difference]: Start difference. First operand 2378 states and 4365 transitions. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states 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 01:52:41,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:52:41,406 INFO L93 Difference]: Finished difference Result 6653 states and 12342 transitions. [2021-11-07 01:52:41,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:52:41,406 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 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 01:52:41,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:52:41,452 INFO L225 Difference]: With dead ends: 6653 [2021-11-07 01:52:41,452 INFO L226 Difference]: Without dead ends: 4324 [2021-11-07 01:52:41,457 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:52:41,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4324 states. [2021-11-07 01:52:41,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4324 to 2344. [2021-11-07 01:52:41,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2344 states, 2339 states have (on average 1.8396750748182984) internal successors, (4303), 2343 states have internal predecessors, (4303), 0 states have call successors, (0), 0 states 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 01:52:41,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2344 states to 2344 states and 4303 transitions. [2021-11-07 01:52:41,639 INFO L78 Accepts]: Start accepts. Automaton has 2344 states and 4303 transitions. Word has length 66 [2021-11-07 01:52:41,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:52:41,639 INFO L470 AbstractCegarLoop]: Abstraction has 2344 states and 4303 transitions. [2021-11-07 01:52:41,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states 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 01:52:41,640 INFO L276 IsEmpty]: Start isEmpty. Operand 2344 states and 4303 transitions. [2021-11-07 01:52:41,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 01:52:41,643 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:52:41,643 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] [2021-11-07 01:52:41,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:52:41,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:52:41,860 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:52:41,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:52:41,861 INFO L85 PathProgramCache]: Analyzing trace with hash -210145356, now seen corresponding path program 1 times [2021-11-07 01:52:41,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:52:41,862 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1689274524] [2021-11-07 01:52:41,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:52:41,862 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:52:41,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:52:41,863 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:52:41,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:52:42,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:52:42,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:52:42,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:52:42,506 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 01:52:42,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:52:42,715 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 01:52:42,715 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:52:42,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1689274524] [2021-11-07 01:52:42,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1689274524] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:52:42,716 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:52:42,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:52:42,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844670450] [2021-11-07 01:52:42,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:52:42,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:52:42,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:52:42,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:52:42,718 INFO L87 Difference]: Start difference. First operand 2344 states and 4303 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:52:44,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:52:44,251 INFO L93 Difference]: Finished difference Result 9282 states and 17165 transitions. [2021-11-07 01:52:44,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:52:44,251 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-07 01:52:44,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:52:44,271 INFO L225 Difference]: With dead ends: 9282 [2021-11-07 01:52:44,271 INFO L226 Difference]: Without dead ends: 6986 [2021-11-07 01:52:44,276 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:52:44,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6986 states. [2021-11-07 01:52:44,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6986 to 2348. [2021-11-07 01:52:44,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2348 states, 2343 states have (on average 1.8382415706359367) internal successors, (4307), 2347 states have internal predecessors, (4307), 0 states have call successors, (0), 0 states 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 01:52:44,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2348 states to 2348 states and 4307 transitions. [2021-11-07 01:52:44,458 INFO L78 Accepts]: Start accepts. Automaton has 2348 states and 4307 transitions. Word has length 68 [2021-11-07 01:52:44,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:52:44,458 INFO L470 AbstractCegarLoop]: Abstraction has 2348 states and 4307 transitions. [2021-11-07 01:52:44,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:52:44,459 INFO L276 IsEmpty]: Start isEmpty. Operand 2348 states and 4307 transitions. [2021-11-07 01:52:44,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 01:52:44,461 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:52:44,461 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:52:44,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:52:44,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:52:44,676 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:52:44,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:52:44,677 INFO L85 PathProgramCache]: Analyzing trace with hash 46387039, now seen corresponding path program 1 times [2021-11-07 01:52:44,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:52:44,677 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [305175666] [2021-11-07 01:52:44,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:52:44,678 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:52:44,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:52:44,678 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:52:44,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:52:45,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:52:45,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:52:45,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:52:45,348 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 01:52:45,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:52:45,558 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 01:52:45,559 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:52:45,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [305175666] [2021-11-07 01:52:45,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [305175666] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:52:45,559 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:52:45,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:52:45,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304259289] [2021-11-07 01:52:45,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:52:45,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:52:45,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:52:45,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:52:45,561 INFO L87 Difference]: Start difference. First operand 2348 states and 4307 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states 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 01:52:47,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:52:47,033 INFO L93 Difference]: Finished difference Result 6546 states and 12074 transitions. [2021-11-07 01:52:47,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:52:47,034 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-07 01:52:47,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:52:47,044 INFO L225 Difference]: With dead ends: 6546 [2021-11-07 01:52:47,044 INFO L226 Difference]: Without dead ends: 4233 [2021-11-07 01:52:47,048 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 134 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 01:52:47,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4233 states. [2021-11-07 01:52:47,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4233 to 3224. [2021-11-07 01:52:47,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3224 states, 3219 states have (on average 1.8238583410997204) internal successors, (5871), 3223 states have internal predecessors, (5871), 0 states have call successors, (0), 0 states 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 01:52:47,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3224 states to 3224 states and 5871 transitions. [2021-11-07 01:52:47,215 INFO L78 Accepts]: Start accepts. Automaton has 3224 states and 5871 transitions. Word has length 69 [2021-11-07 01:52:47,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:52:47,215 INFO L470 AbstractCegarLoop]: Abstraction has 3224 states and 5871 transitions. [2021-11-07 01:52:47,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states 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 01:52:47,216 INFO L276 IsEmpty]: Start isEmpty. Operand 3224 states and 5871 transitions. [2021-11-07 01:52:47,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 01:52:47,218 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:52:47,218 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 01:52:47,232 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:52:47,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:52:47,432 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:52:47,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:52:47,432 INFO L85 PathProgramCache]: Analyzing trace with hash 437759977, now seen corresponding path program 1 times [2021-11-07 01:52:47,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:52:47,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [580703705] [2021-11-07 01:52:47,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:52:47,433 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:52:47,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:52:47,434 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:52:47,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:52:47,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:52:47,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:52:47,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:52:48,168 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 01:52:48,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:52:48,377 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 01:52:48,377 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:52:48,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [580703705] [2021-11-07 01:52:48,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [580703705] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:52:48,378 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:52:48,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:52:48,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65423756] [2021-11-07 01:52:48,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:52:48,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:52:48,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:52:48,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:52:48,379 INFO L87 Difference]: Start difference. First operand 3224 states and 5871 transitions. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:52:49,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:52:49,584 INFO L93 Difference]: Finished difference Result 23219 states and 42577 transitions. [2021-11-07 01:52:49,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:52:49,585 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-07 01:52:49,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:52:49,636 INFO L225 Difference]: With dead ends: 23219 [2021-11-07 01:52:49,636 INFO L226 Difference]: Without dead ends: 20039 [2021-11-07 01:52:49,644 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 137 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 01:52:49,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20039 states. [2021-11-07 01:52:50,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20039 to 5914. [2021-11-07 01:52:50,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5914 states, 5909 states have (on average 1.8356743949906922) internal successors, (10847), 5913 states have internal predecessors, (10847), 0 states have call successors, (0), 0 states 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 01:52:50,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5914 states to 5914 states and 10847 transitions. [2021-11-07 01:52:50,105 INFO L78 Accepts]: Start accepts. Automaton has 5914 states and 10847 transitions. Word has length 71 [2021-11-07 01:52:50,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:52:50,106 INFO L470 AbstractCegarLoop]: Abstraction has 5914 states and 10847 transitions. [2021-11-07 01:52:50,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:52:50,106 INFO L276 IsEmpty]: Start isEmpty. Operand 5914 states and 10847 transitions. [2021-11-07 01:52:50,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 01:52:50,108 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:52:50,109 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 01:52:50,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:52:50,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:52:50,324 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:52:50,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:52:50,324 INFO L85 PathProgramCache]: Analyzing trace with hash 712519591, now seen corresponding path program 1 times [2021-11-07 01:52:50,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:52:50,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1634392640] [2021-11-07 01:52:50,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:52:50,325 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:52:50,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:52:50,326 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:52:50,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:52:50,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:52:50,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:52:50,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:52:51,124 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 01:52:51,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:52:51,349 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 01:52:51,350 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:52:51,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1634392640] [2021-11-07 01:52:51,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1634392640] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:52:51,350 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:52:51,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 01:52:51,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235985113] [2021-11-07 01:52:51,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:52:51,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:52:51,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:52:51,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:52:51,353 INFO L87 Difference]: Start difference. First operand 5914 states and 10847 transitions. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:52:52,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:52:52,246 INFO L93 Difference]: Finished difference Result 10719 states and 19574 transitions. [2021-11-07 01:52:52,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 01:52:52,246 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-07 01:52:52,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:52:52,264 INFO L225 Difference]: With dead ends: 10719 [2021-11-07 01:52:52,264 INFO L226 Difference]: Without dead ends: 8145 [2021-11-07 01:52:52,268 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:52:52,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8145 states. [2021-11-07 01:52:52,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8145 to 5904. [2021-11-07 01:52:52,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5904 states, 5899 states have (on average 1.8353958298016613) internal successors, (10827), 5903 states have internal predecessors, (10827), 0 states have call successors, (0), 0 states 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 01:52:52,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5904 states to 5904 states and 10827 transitions. [2021-11-07 01:52:52,564 INFO L78 Accepts]: Start accepts. Automaton has 5904 states and 10827 transitions. Word has length 71 [2021-11-07 01:52:52,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:52:52,564 INFO L470 AbstractCegarLoop]: Abstraction has 5904 states and 10827 transitions. [2021-11-07 01:52:52,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:52:52,565 INFO L276 IsEmpty]: Start isEmpty. Operand 5904 states and 10827 transitions. [2021-11-07 01:52:52,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 01:52:52,568 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:52:52,568 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 01:52:52,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:52:52,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:52:52,783 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:52:52,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:52:52,783 INFO L85 PathProgramCache]: Analyzing trace with hash -718534163, now seen corresponding path program 1 times [2021-11-07 01:52:52,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:52:52,783 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [489664912] [2021-11-07 01:52:52,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:52:52,784 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:52:52,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:52:52,784 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:52:52,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:52:53,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:52:53,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:52:53,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:52:53,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:52:53,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:52:53,802 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 01:52:53,803 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:52:53,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [489664912] [2021-11-07 01:52:53,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [489664912] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:52:53,803 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:52:53,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:52:53,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916609175] [2021-11-07 01:52:53,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:52:53,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:52:53,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:52:53,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:52:53,804 INFO L87 Difference]: Start difference. First operand 5904 states and 10827 transitions. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states 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 01:52:54,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:52:54,487 INFO L93 Difference]: Finished difference Result 18080 states and 33216 transitions. [2021-11-07 01:52:54,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:52:54,488 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 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 01:52:54,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:52:54,515 INFO L225 Difference]: With dead ends: 18080 [2021-11-07 01:52:54,516 INFO L226 Difference]: Without dead ends: 15512 [2021-11-07 01:52:54,522 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 141 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 01:52:54,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15512 states. [2021-11-07 01:52:55,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15512 to 8211. [2021-11-07 01:52:55,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8211 states, 8206 states have (on average 1.8289056787716305) internal successors, (15008), 8210 states have internal predecessors, (15008), 0 states have call successors, (0), 0 states 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 01:52:55,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8211 states to 8211 states and 15008 transitions. [2021-11-07 01:52:55,054 INFO L78 Accepts]: Start accepts. Automaton has 8211 states and 15008 transitions. Word has length 73 [2021-11-07 01:52:55,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:52:55,054 INFO L470 AbstractCegarLoop]: Abstraction has 8211 states and 15008 transitions. [2021-11-07 01:52:55,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states 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 01:52:55,055 INFO L276 IsEmpty]: Start isEmpty. Operand 8211 states and 15008 transitions. [2021-11-07 01:52:55,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 01:52:55,057 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:52:55,058 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 01:52:55,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:52:55,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:52:55,272 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:52:55,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:52:55,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1107544641, now seen corresponding path program 1 times [2021-11-07 01:52:55,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:52:55,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1552127141] [2021-11-07 01:52:55,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:52:55,274 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:52:55,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:52:55,275 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:52:55,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:52:55,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:52:55,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:52:55,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:52:56,194 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 01:52:56,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:52:56,455 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 01:52:56,456 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:52:56,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1552127141] [2021-11-07 01:52:56,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1552127141] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:52:56,456 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:52:56,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 01:52:56,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131252959] [2021-11-07 01:52:56,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:52:56,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:52:56,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:52:56,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:52:56,458 INFO L87 Difference]: Start difference. First operand 8211 states and 15008 transitions. Second operand has 6 states, 6 states have (on average 21.5) internal successors, (129), 5 states have internal predecessors, (129), 0 states have call successors, (0), 0 states 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 01:52:58,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:52:58,748 INFO L93 Difference]: Finished difference Result 36324 states and 66795 transitions. [2021-11-07 01:52:58,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 01:52:58,748 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.5) internal successors, (129), 5 states have internal predecessors, (129), 0 states have call successors, (0), 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 01:52:58,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:52:58,788 INFO L225 Difference]: With dead ends: 36324 [2021-11-07 01:52:58,788 INFO L226 Difference]: Without dead ends: 31449 [2021-11-07 01:52:58,797 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:52:58,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31449 states. [2021-11-07 01:52:59,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31449 to 11957. [2021-11-07 01:52:59,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11957 states, 11952 states have (on average 1.8372657295850068) internal successors, (21959), 11956 states have internal predecessors, (21959), 0 states have call successors, (0), 0 states 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 01:52:59,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11957 states to 11957 states and 21959 transitions. [2021-11-07 01:52:59,607 INFO L78 Accepts]: Start accepts. Automaton has 11957 states and 21959 transitions. Word has length 75 [2021-11-07 01:52:59,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:52:59,608 INFO L470 AbstractCegarLoop]: Abstraction has 11957 states and 21959 transitions. [2021-11-07 01:52:59,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.5) internal successors, (129), 5 states have internal predecessors, (129), 0 states have call successors, (0), 0 states 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 01:52:59,608 INFO L276 IsEmpty]: Start isEmpty. Operand 11957 states and 21959 transitions. [2021-11-07 01:52:59,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 01:52:59,612 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:52:59,612 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:52:59,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:52:59,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:52:59,828 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:52:59,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:52:59,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1850221294, now seen corresponding path program 1 times [2021-11-07 01:52:59,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:52:59,829 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1279718584] [2021-11-07 01:52:59,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:52:59,829 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:52:59,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:52:59,830 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:52:59,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:53:00,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:53:00,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:53:00,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:53:00,655 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 01:53:00,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:53:00,837 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 01:53:00,837 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:53:00,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1279718584] [2021-11-07 01:53:00,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1279718584] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:53:00,838 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:53:00,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:53:00,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602440584] [2021-11-07 01:53:00,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:53:00,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:53:00,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:53:00,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:53:00,842 INFO L87 Difference]: Start difference. First operand 11957 states and 21959 transitions. Second operand has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states 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 01:53:01,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:53:01,476 INFO L93 Difference]: Finished difference Result 20710 states and 37904 transitions. [2021-11-07 01:53:01,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:53:01,476 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-07 01:53:01,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:53:01,487 INFO L225 Difference]: With dead ends: 20710 [2021-11-07 01:53:01,487 INFO L226 Difference]: Without dead ends: 11972 [2021-11-07 01:53:01,495 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:53:01,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11972 states. [2021-11-07 01:53:02,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11972 to 11957. [2021-11-07 01:53:02,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11957 states, 11952 states have (on average 1.828062248995984) internal successors, (21849), 11956 states have internal predecessors, (21849), 0 states have call successors, (0), 0 states 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 01:53:02,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11957 states to 11957 states and 21849 transitions. [2021-11-07 01:53:02,181 INFO L78 Accepts]: Start accepts. Automaton has 11957 states and 21849 transitions. Word has length 82 [2021-11-07 01:53:02,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:53:02,181 INFO L470 AbstractCegarLoop]: Abstraction has 11957 states and 21849 transitions. [2021-11-07 01:53:02,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states 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 01:53:02,182 INFO L276 IsEmpty]: Start isEmpty. Operand 11957 states and 21849 transitions. [2021-11-07 01:53:02,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-07 01:53:02,185 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:53:02,186 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:53:02,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:53:02,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:53:02,399 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:53:02,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:53:02,399 INFO L85 PathProgramCache]: Analyzing trace with hash -2069122490, now seen corresponding path program 1 times [2021-11-07 01:53:02,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:53:02,400 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1740926027] [2021-11-07 01:53:02,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:53:02,400 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:53:02,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:53:02,401 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:53:02,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:53:03,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:53:03,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:53:03,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:53:03,393 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 01:53:03,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:53:03,635 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 01:53:03,635 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:53:03,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1740926027] [2021-11-07 01:53:03,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1740926027] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:53:03,636 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:53:03,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 01:53:03,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162260661] [2021-11-07 01:53:03,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:53:03,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:53:03,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:53:03,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:53:03,637 INFO L87 Difference]: Start difference. First operand 11957 states and 21849 transitions. Second operand has 6 states, 6 states have (on average 25.166666666666668) internal successors, (151), 5 states have internal predecessors, (151), 0 states have call successors, (0), 0 states 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 01:53:05,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:53:05,509 INFO L93 Difference]: Finished difference Result 31526 states and 57460 transitions. [2021-11-07 01:53:05,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 01:53:05,509 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.166666666666668) internal successors, (151), 5 states have internal predecessors, (151), 0 states have call successors, (0), 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 83 [2021-11-07 01:53:05,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:53:05,533 INFO L225 Difference]: With dead ends: 31526 [2021-11-07 01:53:05,533 INFO L226 Difference]: Without dead ends: 23126 [2021-11-07 01:53:05,543 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:53:05,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23126 states. [2021-11-07 01:53:06,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23126 to 10417. [2021-11-07 01:53:06,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10417 states, 10412 states have (on average 1.8172301190933537) internal successors, (18921), 10416 states have internal predecessors, (18921), 0 states have call successors, (0), 0 states 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 01:53:06,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10417 states to 10417 states and 18921 transitions. [2021-11-07 01:53:06,447 INFO L78 Accepts]: Start accepts. Automaton has 10417 states and 18921 transitions. Word has length 83 [2021-11-07 01:53:06,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:53:06,448 INFO L470 AbstractCegarLoop]: Abstraction has 10417 states and 18921 transitions. [2021-11-07 01:53:06,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.166666666666668) internal successors, (151), 5 states have internal predecessors, (151), 0 states have call successors, (0), 0 states 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 01:53:06,448 INFO L276 IsEmpty]: Start isEmpty. Operand 10417 states and 18921 transitions. [2021-11-07 01:53:06,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-07 01:53:06,452 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:53:06,452 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:53:06,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:53:06,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:53:06,671 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:53:06,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:53:06,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1214727556, now seen corresponding path program 1 times [2021-11-07 01:53:06,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:53:06,672 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [865277743] [2021-11-07 01:53:06,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:53:06,672 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:53:06,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:53:06,673 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:53:06,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:53:07,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:53:07,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:53:07,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:53:07,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:53:07,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:53:07,930 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 01:53:07,930 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:53:07,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [865277743] [2021-11-07 01:53:07,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [865277743] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:53:07,931 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:53:07,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-07 01:53:07,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873813758] [2021-11-07 01:53:07,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 01:53:07,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:53:07,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 01:53:07,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:53:07,933 INFO L87 Difference]: Start difference. First operand 10417 states and 18921 transitions. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 9 states have internal predecessors, (157), 0 states have call successors, (0), 0 states 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 01:53:18,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:53:18,358 INFO L93 Difference]: Finished difference Result 65569 states and 117912 transitions. [2021-11-07 01:53:18,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-07 01:53:18,359 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 9 states have internal predecessors, (157), 0 states have call successors, (0), 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 83 [2021-11-07 01:53:18,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:53:18,436 INFO L225 Difference]: With dead ends: 65569 [2021-11-07 01:53:18,436 INFO L226 Difference]: Without dead ends: 56704 [2021-11-07 01:53:18,449 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=285, Invalid=905, Unknown=0, NotChecked=0, Total=1190 [2021-11-07 01:53:18,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56704 states. [2021-11-07 01:53:19,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56704 to 23074. [2021-11-07 01:53:19,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23074 states, 23069 states have (on average 1.8116086523039576) internal successors, (41792), 23073 states have internal predecessors, (41792), 0 states have call successors, (0), 0 states 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 01:53:19,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23074 states to 23074 states and 41792 transitions. [2021-11-07 01:53:19,799 INFO L78 Accepts]: Start accepts. Automaton has 23074 states and 41792 transitions. Word has length 83 [2021-11-07 01:53:19,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:53:19,800 INFO L470 AbstractCegarLoop]: Abstraction has 23074 states and 41792 transitions. [2021-11-07 01:53:19,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 9 states have internal predecessors, (157), 0 states have call successors, (0), 0 states 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 01:53:19,800 INFO L276 IsEmpty]: Start isEmpty. Operand 23074 states and 41792 transitions. [2021-11-07 01:53:19,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 01:53:19,802 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:53:19,802 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:53:19,816 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:53:20,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:53:20,003 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:53:20,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:53:20,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1377924987, now seen corresponding path program 1 times [2021-11-07 01:53:20,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:53:20,004 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [748380481] [2021-11-07 01:53:20,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:53:20,004 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:53:20,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:53:20,005 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:53:20,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:53:20,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:53:20,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:53:20,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:53:20,998 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 01:53:20,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:53:21,263 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 01:53:21,263 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:53:21,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [748380481] [2021-11-07 01:53:21,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [748380481] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:53:21,263 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:53:21,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:53:21,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506385194] [2021-11-07 01:53:21,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:53:21,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:53:21,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:53:21,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:53:21,265 INFO L87 Difference]: Start difference. First operand 23074 states and 41792 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:53:23,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:53:23,865 INFO L93 Difference]: Finished difference Result 67148 states and 121683 transitions. [2021-11-07 01:53:23,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:53:23,866 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-07 01:53:23,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:53:23,921 INFO L225 Difference]: With dead ends: 67148 [2021-11-07 01:53:23,922 INFO L226 Difference]: Without dead ends: 45646 [2021-11-07 01:53:23,936 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 165 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 01:53:23,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45646 states. [2021-11-07 01:53:26,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45646 to 45644. [2021-11-07 01:53:26,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45644 states, 45639 states have (on average 1.8133394684370823) internal successors, (82759), 45643 states have internal predecessors, (82759), 0 states have call successors, (0), 0 states 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 01:53:26,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45644 states to 45644 states and 82759 transitions. [2021-11-07 01:53:26,417 INFO L78 Accepts]: Start accepts. Automaton has 45644 states and 82759 transitions. Word has length 84 [2021-11-07 01:53:26,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:53:26,417 INFO L470 AbstractCegarLoop]: Abstraction has 45644 states and 82759 transitions. [2021-11-07 01:53:26,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:53:26,418 INFO L276 IsEmpty]: Start isEmpty. Operand 45644 states and 82759 transitions. [2021-11-07 01:53:26,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-07 01:53:26,422 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:53:26,422 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:53:26,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:53:26,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:53:26,638 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:53:26,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:53:26,638 INFO L85 PathProgramCache]: Analyzing trace with hash 602419469, now seen corresponding path program 1 times [2021-11-07 01:53:26,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:53:26,639 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1952052199] [2021-11-07 01:53:26,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:53:26,639 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:53:26,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:53:26,640 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:53:26,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:53:27,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:53:27,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:53:27,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:53:27,957 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 01:53:27,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:53:28,371 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 01:53:28,371 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:53:28,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1952052199] [2021-11-07 01:53:28,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1952052199] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:53:28,372 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:53:28,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-07 01:53:28,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357138872] [2021-11-07 01:53:28,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:53:28,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:53:28,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:53:28,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:53:28,374 INFO L87 Difference]: Start difference. First operand 45644 states and 82759 transitions. Second operand has 8 states, 8 states have (on average 21.0) internal successors, (168), 7 states have internal predecessors, (168), 0 states have call successors, (0), 0 states 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 01:53:33,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:53:33,975 INFO L93 Difference]: Finished difference Result 66349 states and 120509 transitions. [2021-11-07 01:53:33,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:53:33,975 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 21.0) internal successors, (168), 7 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-07 01:53:33,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:53:34,062 INFO L225 Difference]: With dead ends: 66349 [2021-11-07 01:53:34,062 INFO L226 Difference]: Without dead ends: 66332 [2021-11-07 01:53:34,071 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:53:34,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66332 states. [2021-11-07 01:53:37,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66332 to 52445. [2021-11-07 01:53:37,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52445 states, 52440 states have (on average 1.8147978642257818) internal successors, (95168), 52444 states have internal predecessors, (95168), 0 states have call successors, (0), 0 states 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 01:53:37,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52445 states to 52445 states and 95168 transitions. [2021-11-07 01:53:37,342 INFO L78 Accepts]: Start accepts. Automaton has 52445 states and 95168 transitions. Word has length 85 [2021-11-07 01:53:37,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:53:37,343 INFO L470 AbstractCegarLoop]: Abstraction has 52445 states and 95168 transitions. [2021-11-07 01:53:37,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.0) internal successors, (168), 7 states have internal predecessors, (168), 0 states have call successors, (0), 0 states 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 01:53:37,343 INFO L276 IsEmpty]: Start isEmpty. Operand 52445 states and 95168 transitions. [2021-11-07 01:53:37,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-07 01:53:37,347 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:53:37,347 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:53:37,361 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-07 01:53:37,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:53:37,557 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:53:37,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:53:37,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1081069528, now seen corresponding path program 1 times [2021-11-07 01:53:37,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:53:37,558 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [279152763] [2021-11-07 01:53:37,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:53:37,558 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:53:37,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:53:37,559 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:53:37,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 01:53:38,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:53:38,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:53:38,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:53:38,568 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 01:53:38,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:53:38,702 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 01:53:38,702 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:53:38,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [279152763] [2021-11-07 01:53:38,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [279152763] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:53:38,703 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:53:38,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:53:38,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673026448] [2021-11-07 01:53:38,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:53:38,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:53:38,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:53:38,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:53:38,705 INFO L87 Difference]: Start difference. First operand 52445 states and 95168 transitions. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states 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 01:53:41,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:53:41,599 INFO L93 Difference]: Finished difference Result 52462 states and 95185 transitions. [2021-11-07 01:53:41,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:53:41,600 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-11-07 01:53:41,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:53:41,666 INFO L225 Difference]: With dead ends: 52462 [2021-11-07 01:53:41,667 INFO L226 Difference]: Without dead ends: 52445 [2021-11-07 01:53:41,674 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:53:41,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52445 states. [2021-11-07 01:53:44,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52445 to 52445. [2021-11-07 01:53:44,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52445 states, 52440 states have (on average 1.8139397406559878) internal successors, (95123), 52444 states have internal predecessors, (95123), 0 states have call successors, (0), 0 states 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 01:53:44,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52445 states to 52445 states and 95123 transitions. [2021-11-07 01:53:44,834 INFO L78 Accepts]: Start accepts. Automaton has 52445 states and 95123 transitions. Word has length 87 [2021-11-07 01:53:44,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:53:44,835 INFO L470 AbstractCegarLoop]: Abstraction has 52445 states and 95123 transitions. [2021-11-07 01:53:44,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states 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 01:53:44,835 INFO L276 IsEmpty]: Start isEmpty. Operand 52445 states and 95123 transitions. [2021-11-07 01:53:44,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-07 01:53:44,841 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:53:44,841 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:53:44,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-07 01:53:45,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:53:45,057 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:53:45,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:53:45,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1050648817, now seen corresponding path program 1 times [2021-11-07 01:53:45,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:53:45,058 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1663943034] [2021-11-07 01:53:45,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:53:45,058 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:53:45,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:53:45,059 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:53:45,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a08d7e98-efb1-4e8a-93e4-3518e1070774/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-07 01:53:46,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:53:46,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:53:46,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:53:46,431 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 01:53:46,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:53:46,699 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 01:53:46,700 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:53:46,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1663943034] [2021-11-07 01:53:46,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1663943034] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:53:46,700 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:53:46,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:53:46,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241213203] [2021-11-07 01:53:46,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:53:46,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:53:46,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:53:46,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:53:46,701 INFO L87 Difference]: Start difference. First operand 52445 states and 95123 transitions. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)