./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec1_product35.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_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/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_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec1_product35.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/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_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/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 c4f282cd51b7c35fd32c34f82b9fbd91d93e4244798e2a2790fa24fbe3843942 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:00:40,613 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:00:40,616 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:00:40,671 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:00:40,671 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:00:40,676 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:00:40,677 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:00:40,681 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:00:40,684 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:00:40,689 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:00:40,691 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:00:40,692 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:00:40,693 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:00:40,695 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:00:40,697 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:00:40,701 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:00:40,703 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:00:40,704 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:00:40,706 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:00:40,714 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:00:40,716 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:00:40,717 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:00:40,721 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:00:40,722 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:00:40,731 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:00:40,731 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:00:40,732 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:00:40,734 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:00:40,735 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:00:40,736 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:00:40,736 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:00:40,737 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:00:40,740 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:00:40,741 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:00:40,742 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:00:40,743 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:00:40,743 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:00:40,744 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:00:40,744 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:00:40,745 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:00:40,746 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:00:40,747 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 02:00:40,790 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:00:40,790 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:00:40,792 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:00:40,792 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:00:40,792 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:00:40,793 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:00:40,793 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:00:40,793 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:00:40,799 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:00:40,800 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:00:40,801 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:00:40,801 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:00:40,802 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:00:40,802 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:00:40,802 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:00:40,803 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:00:40,803 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:00:40,804 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:00:40,804 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:00:40,804 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:00:40,804 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:00:40,805 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:00:40,805 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:00:40,805 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:00:40,805 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:00:40,806 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:00:40,806 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:00:40,806 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:00:40,807 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:00:40,808 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:00:40,809 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:00:40,809 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:00:40,809 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:00:40,810 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:00:40,810 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:00:40,810 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:00:40,811 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:00:40,811 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:00:40,811 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:00:40,811 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_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c4f282cd51b7c35fd32c34f82b9fbd91d93e4244798e2a2790fa24fbe3843942 [2021-11-07 02:00:41,167 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:00:41,207 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:00:41,210 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:00:41,211 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:00:41,212 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:00:41,213 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec1_product35.cil.c [2021-11-07 02:00:41,282 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/data/16a866fc3/87ab7f584e2b434dbca58eec638bcc9a/FLAGcfb82819f [2021-11-07 02:00:41,922 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:00:41,922 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/sv-benchmarks/c/product-lines/email_spec1_product35.cil.c [2021-11-07 02:00:41,949 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/data/16a866fc3/87ab7f584e2b434dbca58eec638bcc9a/FLAGcfb82819f [2021-11-07 02:00:42,160 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/data/16a866fc3/87ab7f584e2b434dbca58eec638bcc9a [2021-11-07 02:00:42,163 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:00:42,166 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:00:42,170 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:00:42,170 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:00:42,175 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:00:42,176 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:00:42" (1/1) ... [2021-11-07 02:00:42,179 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d795e3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:00:42, skipping insertion in model container [2021-11-07 02:00:42,179 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:00:42" (1/1) ... [2021-11-07 02:00:42,187 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:00:42,308 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:00:42,923 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_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/sv-benchmarks/c/product-lines/email_spec1_product35.cil.c[66161,66174] [2021-11-07 02:00:42,926 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:00:42,939 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 02:00:42,939 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5b93e86c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:00:42, skipping insertion in model container [2021-11-07 02:00:42,939 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:00:42,940 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 02:00:42,942 INFO L168 Benchmark]: Toolchain (without parser) took 775.07 ms. Allocated memory is still 107.0 MB. Free memory was 62.9 MB in the beginning and 67.0 MB in the end (delta: -4.1 MB). Peak memory consumption was 7.1 MB. Max. memory is 16.1 GB. [2021-11-07 02:00:42,943 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 107.0 MB. Free memory is still 82.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 02:00:42,944 INFO L168 Benchmark]: CACSL2BoogieTranslator took 769.79 ms. Allocated memory is still 107.0 MB. Free memory was 62.7 MB in the beginning and 67.2 MB in the end (delta: -4.6 MB). Peak memory consumption was 7.1 MB. Max. memory is 16.1 GB. [2021-11-07 02:00:42,945 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 107.0 MB. Free memory is still 82.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 769.79 ms. Allocated memory is still 107.0 MB. Free memory was 62.7 MB in the beginning and 67.2 MB in the end (delta: -4.6 MB). Peak memory consumption was 7.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 421]: 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_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/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_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec1_product35.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/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_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/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 c4f282cd51b7c35fd32c34f82b9fbd91d93e4244798e2a2790fa24fbe3843942 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:00:45,223 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:00:45,225 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:00:45,270 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:00:45,271 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:00:45,276 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:00:45,278 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:00:45,283 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:00:45,286 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:00:45,297 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:00:45,298 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:00:45,300 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:00:45,301 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:00:45,304 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:00:45,306 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:00:45,312 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:00:45,314 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:00:45,315 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:00:45,317 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:00:45,324 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:00:45,325 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:00:45,327 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:00:45,328 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:00:45,329 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:00:45,334 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:00:45,336 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:00:45,337 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:00:45,339 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:00:45,340 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:00:45,341 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:00:45,342 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:00:45,343 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:00:45,345 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:00:45,346 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:00:45,348 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:00:45,348 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:00:45,360 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:00:45,361 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:00:45,361 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:00:45,363 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:00:45,364 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:00:45,369 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 02:00:45,412 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:00:45,413 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:00:45,414 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:00:45,414 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:00:45,414 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:00:45,414 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:00:45,414 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:00:45,415 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:00:45,415 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:00:45,416 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:00:45,416 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:00:45,416 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:00:45,416 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:00:45,417 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:00:45,417 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:00:45,417 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:00:45,417 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:00:45,418 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 02:00:45,418 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 02:00:45,418 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:00:45,418 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:00:45,419 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:00:45,419 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:00:45,419 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:00:45,419 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 02:00:45,419 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:00:45,420 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:00:45,420 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:00:45,420 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:00:45,420 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:00:45,421 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 02:00:45,421 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 02:00:45,421 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:00:45,421 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:00:45,422 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:00:45,422 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_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c4f282cd51b7c35fd32c34f82b9fbd91d93e4244798e2a2790fa24fbe3843942 [2021-11-07 02:00:45,755 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:00:45,793 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:00:45,797 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:00:45,799 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:00:45,799 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:00:45,802 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec1_product35.cil.c [2021-11-07 02:00:45,872 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/data/a39bb6915/b3afc7ff6026429aa9e0a04bf46338ac/FLAG7720c8d45 [2021-11-07 02:00:46,558 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:00:46,559 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/sv-benchmarks/c/product-lines/email_spec1_product35.cil.c [2021-11-07 02:00:46,584 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/data/a39bb6915/b3afc7ff6026429aa9e0a04bf46338ac/FLAG7720c8d45 [2021-11-07 02:00:46,712 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/data/a39bb6915/b3afc7ff6026429aa9e0a04bf46338ac [2021-11-07 02:00:46,715 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:00:46,717 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:00:46,719 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:00:46,719 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:00:46,723 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:00:46,724 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:00:46" (1/1) ... [2021-11-07 02:00:46,725 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2701a6d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:00:46, skipping insertion in model container [2021-11-07 02:00:46,726 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:00:46" (1/1) ... [2021-11-07 02:00:46,733 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:00:46,816 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:00:47,577 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_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/sv-benchmarks/c/product-lines/email_spec1_product35.cil.c[66161,66174] [2021-11-07 02:00:47,580 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:00:47,603 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 02:00:47,622 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:00:47,775 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_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/sv-benchmarks/c/product-lines/email_spec1_product35.cil.c[66161,66174] [2021-11-07 02:00:47,775 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:00:47,784 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:00:47,894 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_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/sv-benchmarks/c/product-lines/email_spec1_product35.cil.c[66161,66174] [2021-11-07 02:00:47,895 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:00:47,950 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:00:47,951 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:00:47 WrapperNode [2021-11-07 02:00:47,951 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:00:47,952 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:00:47,953 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:00:47,953 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:00:47,960 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:00:47" (1/1) ... [2021-11-07 02:00:48,021 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:00:47" (1/1) ... [2021-11-07 02:00:48,240 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:00:48,241 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:00:48,241 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:00:48,242 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:00:48,250 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:00:47" (1/1) ... [2021-11-07 02:00:48,251 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:00:47" (1/1) ... [2021-11-07 02:00:48,276 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:00:47" (1/1) ... [2021-11-07 02:00:48,277 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:00:47" (1/1) ... [2021-11-07 02:00:48,365 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:00:47" (1/1) ... [2021-11-07 02:00:48,410 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:00:47" (1/1) ... [2021-11-07 02:00:48,423 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:00:47" (1/1) ... [2021-11-07 02:00:48,515 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:00:48,516 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:00:48,516 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:00:48,517 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:00:48,517 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:00:47" (1/1) ... [2021-11-07 02:00:48,524 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:00:48,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:00:48,546 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:00:48,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:00:48,599 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 02:00:48,599 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:00:48,599 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 02:00:48,600 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:00:48,600 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:00:55,807 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:00:55,807 INFO L299 CfgBuilder]: Removed 925 assume(true) statements. [2021-11-07 02:00:55,812 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:00:55 BoogieIcfgContainer [2021-11-07 02:00:55,812 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:00:55,814 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:00:55,814 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:00:55,817 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:00:55,818 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:00:46" (1/3) ... [2021-11-07 02:00:55,818 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b01105e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:00:55, skipping insertion in model container [2021-11-07 02:00:55,819 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:00:47" (2/3) ... [2021-11-07 02:00:55,819 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b01105e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:00:55, skipping insertion in model container [2021-11-07 02:00:55,819 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:00:55" (3/3) ... [2021-11-07 02:00:55,821 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec1_product35.cil.c [2021-11-07 02:00:55,826 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:00:55,827 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-07 02:00:55,885 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:00:55,892 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 02:00:55,892 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-07 02:00:55,944 INFO L276 IsEmpty]: Start isEmpty. Operand has 1336 states, 1329 states have (on average 1.7223476297968396) internal successors, (2289), 1335 states have internal predecessors, (2289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:55,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-07 02:00:55,965 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:00:55,966 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] [2021-11-07 02:00:55,966 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:00:55,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:00:55,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1211852002, now seen corresponding path program 1 times [2021-11-07 02:00:55,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:00:55,999 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1483448399] [2021-11-07 02:00:55,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:00:56,000 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:00:56,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:00:56,005 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:00:56,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 02:00:56,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:00:56,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 02:00:56,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:00:56,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:00:56,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:00:56,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:00:56,889 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:00:56,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1483448399] [2021-11-07 02:00:56,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1483448399] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:00:56,890 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:00:56,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:00:56,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298100763] [2021-11-07 02:00:56,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 02:00:56,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:00:56,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 02:00:56,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:00:56,924 INFO L87 Difference]: Start difference. First operand has 1336 states, 1329 states have (on average 1.7223476297968396) internal successors, (2289), 1335 states have internal predecessors, (2289), 0 states have call successors, (0), 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 24.0) internal successors, (48), 2 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 02:00:57,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:00:57,070 INFO L93 Difference]: Finished difference Result 2383 states and 4048 transitions. [2021-11-07 02:00:57,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 02:00:57,072 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 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 48 [2021-11-07 02:00:57,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:00:57,101 INFO L225 Difference]: With dead ends: 2383 [2021-11-07 02:00:57,102 INFO L226 Difference]: Without dead ends: 1092 [2021-11-07 02:00:57,111 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:00:57,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1092 states. [2021-11-07 02:00:57,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1092 to 1092. [2021-11-07 02:00:57,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1092 states, 1086 states have (on average 1.725598526703499) internal successors, (1874), 1091 states have internal predecessors, (1874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:57,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1092 states to 1092 states and 1874 transitions. [2021-11-07 02:00:57,248 INFO L78 Accepts]: Start accepts. Automaton has 1092 states and 1874 transitions. Word has length 48 [2021-11-07 02:00:57,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:00:57,249 INFO L470 AbstractCegarLoop]: Abstraction has 1092 states and 1874 transitions. [2021-11-07 02:00:57,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 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 02:00:57,250 INFO L276 IsEmpty]: Start isEmpty. Operand 1092 states and 1874 transitions. [2021-11-07 02:00:57,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-07 02:00:57,263 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:00:57,263 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] [2021-11-07 02:00:57,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 02:00:57,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:00:57,479 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:00:57,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:00:57,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1791612083, now seen corresponding path program 1 times [2021-11-07 02:00:57,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:00:57,481 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1865057467] [2021-11-07 02:00:57,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:00:57,481 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:00:57,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:00:57,483 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:00:57,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 02:00:57,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:00:57,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:00:57,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:00:58,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:00:58,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:00:58,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:00:58,262 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:00:58,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1865057467] [2021-11-07 02:00:58,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1865057467] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:00:58,263 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:00:58,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:00:58,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545540776] [2021-11-07 02:00:58,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:00:58,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:00:58,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:00:58,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:00:58,272 INFO L87 Difference]: Start difference. First operand 1092 states and 1874 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:58,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:00:58,438 INFO L93 Difference]: Finished difference Result 3246 states and 5574 transitions. [2021-11-07 02:00:58,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:00:58,439 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-07 02:00:58,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:00:58,453 INFO L225 Difference]: With dead ends: 3246 [2021-11-07 02:00:58,453 INFO L226 Difference]: Without dead ends: 2169 [2021-11-07 02:00:58,456 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:00:58,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2169 states. [2021-11-07 02:00:58,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2169 to 1091. [2021-11-07 02:00:58,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1091 states, 1085 states have (on average 1.7225806451612904) internal successors, (1869), 1090 states have internal predecessors, (1869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:58,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1091 states to 1091 states and 1869 transitions. [2021-11-07 02:00:58,535 INFO L78 Accepts]: Start accepts. Automaton has 1091 states and 1869 transitions. Word has length 49 [2021-11-07 02:00:58,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:00:58,536 INFO L470 AbstractCegarLoop]: Abstraction has 1091 states and 1869 transitions. [2021-11-07 02:00:58,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:58,536 INFO L276 IsEmpty]: Start isEmpty. Operand 1091 states and 1869 transitions. [2021-11-07 02:00:58,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-07 02:00:58,545 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:00:58,546 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:00:58,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 02:00:58,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:00:58,770 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:00:58,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:00:58,770 INFO L85 PathProgramCache]: Analyzing trace with hash -155136333, now seen corresponding path program 1 times [2021-11-07 02:00:58,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:00:58,771 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1051102237] [2021-11-07 02:00:58,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:00:58,771 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:00:58,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:00:58,774 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:00:58,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 02:00:59,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:00:59,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:00:59,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:00:59,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:00:59,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:00:59,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:00:59,561 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:00:59,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1051102237] [2021-11-07 02:00:59,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1051102237] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:00:59,562 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:00:59,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:00:59,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90965070] [2021-11-07 02:00:59,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:00:59,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:00:59,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:00:59,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:00:59,564 INFO L87 Difference]: Start difference. First operand 1091 states and 1869 transitions. Second operand has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 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 02:01:00,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:01:00,022 INFO L93 Difference]: Finished difference Result 4281 states and 7338 transitions. [2021-11-07 02:01:00,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:01:00,023 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 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 51 [2021-11-07 02:01:00,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:01:00,043 INFO L225 Difference]: With dead ends: 4281 [2021-11-07 02:01:00,044 INFO L226 Difference]: Without dead ends: 3208 [2021-11-07 02:01:00,046 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 96 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 02:01:00,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3208 states. [2021-11-07 02:01:00,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3208 to 1090. [2021-11-07 02:01:00,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1090 states, 1084 states have (on average 1.720479704797048) internal successors, (1865), 1089 states have internal predecessors, (1865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:00,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1090 states to 1090 states and 1865 transitions. [2021-11-07 02:01:00,137 INFO L78 Accepts]: Start accepts. Automaton has 1090 states and 1865 transitions. Word has length 51 [2021-11-07 02:01:00,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:01:00,138 INFO L470 AbstractCegarLoop]: Abstraction has 1090 states and 1865 transitions. [2021-11-07 02:01:00,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 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 02:01:00,139 INFO L276 IsEmpty]: Start isEmpty. Operand 1090 states and 1865 transitions. [2021-11-07 02:01:00,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 02:01:00,142 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:01:00,143 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:01:00,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 02:01:00,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:01:00,356 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:01:00,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:01:00,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1859354042, now seen corresponding path program 1 times [2021-11-07 02:01:00,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:01:00,358 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2001987871] [2021-11-07 02:01:00,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:00,358 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:01:00,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:01:00,376 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:01:00,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 02:01:00,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:00,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:01:00,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:01:00,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:01:00,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:01:01,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:01:01,130 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:01:01,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2001987871] [2021-11-07 02:01:01,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2001987871] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:01:01,132 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:01:01,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:01:01,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684669683] [2021-11-07 02:01:01,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:01:01,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:01:01,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:01:01,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:01:01,135 INFO L87 Difference]: Start difference. First operand 1090 states and 1865 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:01,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:01:01,246 INFO L93 Difference]: Finished difference Result 2177 states and 3727 transitions. [2021-11-07 02:01:01,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:01:01,247 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-07 02:01:01,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:01:01,254 INFO L225 Difference]: With dead ends: 2177 [2021-11-07 02:01:01,254 INFO L226 Difference]: Without dead ends: 1095 [2021-11-07 02:01:01,256 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 02:01:01,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1095 states. [2021-11-07 02:01:01,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1095 to 1090. [2021-11-07 02:01:01,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1090 states, 1084 states have (on average 1.7177121771217712) internal successors, (1862), 1089 states have internal predecessors, (1862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:01,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1090 states to 1090 states and 1862 transitions. [2021-11-07 02:01:01,324 INFO L78 Accepts]: Start accepts. Automaton has 1090 states and 1862 transitions. Word has length 52 [2021-11-07 02:01:01,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:01:01,324 INFO L470 AbstractCegarLoop]: Abstraction has 1090 states and 1862 transitions. [2021-11-07 02:01:01,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:01,325 INFO L276 IsEmpty]: Start isEmpty. Operand 1090 states and 1862 transitions. [2021-11-07 02:01:01,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-07 02:01:01,326 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:01:01,326 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:01:01,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 02:01:01,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:01:01,548 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:01:01,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:01:01,548 INFO L85 PathProgramCache]: Analyzing trace with hash -953792101, now seen corresponding path program 1 times [2021-11-07 02:01:01,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:01:01,549 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1220665888] [2021-11-07 02:01:01,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:01,550 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:01:01,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:01:01,551 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:01:01,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 02:01:02,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:02,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:01:02,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:01:02,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:01:02,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:01:02,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:01:02,347 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:01:02,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1220665888] [2021-11-07 02:01:02,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1220665888] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:01:02,348 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:01:02,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:01:02,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152091124] [2021-11-07 02:01:02,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:01:02,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:01:02,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:01:02,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:01:02,350 INFO L87 Difference]: Start difference. First operand 1090 states and 1862 transitions. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:02,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:01:02,779 INFO L93 Difference]: Finished difference Result 4268 states and 7314 transitions. [2021-11-07 02:01:02,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:01:02,780 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-07 02:01:02,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:01:02,800 INFO L225 Difference]: With dead ends: 4268 [2021-11-07 02:01:02,800 INFO L226 Difference]: Without dead ends: 3204 [2021-11-07 02:01:02,803 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:01:02,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3204 states. [2021-11-07 02:01:02,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3204 to 1090. [2021-11-07 02:01:02,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1090 states, 1084 states have (on average 1.7149446494464944) internal successors, (1859), 1089 states have internal predecessors, (1859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:02,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1090 states to 1090 states and 1859 transitions. [2021-11-07 02:01:02,908 INFO L78 Accepts]: Start accepts. Automaton has 1090 states and 1859 transitions. Word has length 53 [2021-11-07 02:01:02,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:01:02,908 INFO L470 AbstractCegarLoop]: Abstraction has 1090 states and 1859 transitions. [2021-11-07 02:01:02,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:02,909 INFO L276 IsEmpty]: Start isEmpty. Operand 1090 states and 1859 transitions. [2021-11-07 02:01:02,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 02:01:02,911 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:01:02,912 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] [2021-11-07 02:01:02,928 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 02:01:03,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:01:03,127 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:01:03,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:01:03,127 INFO L85 PathProgramCache]: Analyzing trace with hash -512664938, now seen corresponding path program 1 times [2021-11-07 02:01:03,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:01:03,128 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1594787330] [2021-11-07 02:01:03,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:03,128 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:01:03,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:01:03,130 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:01:03,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 02:01:03,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:03,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:01:03,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:01:03,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:01:03,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:01:03,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:01:03,894 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:01:03,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1594787330] [2021-11-07 02:01:03,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1594787330] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:01:03,895 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:01:03,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:01:03,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332813209] [2021-11-07 02:01:03,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:01:03,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:01:03,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:01:03,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:01:03,896 INFO L87 Difference]: Start difference. First operand 1090 states and 1859 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:04,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:01:04,084 INFO L93 Difference]: Finished difference Result 2957 states and 5035 transitions. [2021-11-07 02:01:04,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:01:04,085 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 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 55 [2021-11-07 02:01:04,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:01:04,098 INFO L225 Difference]: With dead ends: 2957 [2021-11-07 02:01:04,098 INFO L226 Difference]: Without dead ends: 2154 [2021-11-07 02:01:04,101 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:01:04,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2154 states. [2021-11-07 02:01:04,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2154 to 1351. [2021-11-07 02:01:04,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1351 states, 1345 states have (on average 1.7390334572490707) internal successors, (2339), 1350 states have internal predecessors, (2339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:04,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1351 states to 1351 states and 2339 transitions. [2021-11-07 02:01:04,231 INFO L78 Accepts]: Start accepts. Automaton has 1351 states and 2339 transitions. Word has length 55 [2021-11-07 02:01:04,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:01:04,231 INFO L470 AbstractCegarLoop]: Abstraction has 1351 states and 2339 transitions. [2021-11-07 02:01:04,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:04,232 INFO L276 IsEmpty]: Start isEmpty. Operand 1351 states and 2339 transitions. [2021-11-07 02:01:04,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 02:01:04,234 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:01:04,234 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] [2021-11-07 02:01:04,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 02:01:04,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:01:04,455 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:01:04,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:01:04,456 INFO L85 PathProgramCache]: Analyzing trace with hash -752457529, now seen corresponding path program 1 times [2021-11-07 02:01:04,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:01:04,456 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [965341106] [2021-11-07 02:01:04,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:04,457 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:01:04,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:01:04,459 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:01:04,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 02:01:04,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:04,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:01:04,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:01:05,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:01:05,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:01:05,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:01:05,279 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:01:05,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [965341106] [2021-11-07 02:01:05,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [965341106] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:01:05,279 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:01:05,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:01:05,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087968439] [2021-11-07 02:01:05,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:01:05,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:01:05,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:01:05,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:01:05,281 INFO L87 Difference]: Start difference. First operand 1351 states and 2339 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:05,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:01:05,504 INFO L93 Difference]: Finished difference Result 3630 states and 6276 transitions. [2021-11-07 02:01:05,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:01:05,504 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 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 67 [2021-11-07 02:01:05,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:01:05,519 INFO L225 Difference]: With dead ends: 3630 [2021-11-07 02:01:05,519 INFO L226 Difference]: Without dead ends: 2363 [2021-11-07 02:01:05,521 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:01:05,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2363 states. [2021-11-07 02:01:05,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2363 to 1560. [2021-11-07 02:01:05,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1560 states, 1554 states have (on average 1.7516087516087515) internal successors, (2722), 1559 states have internal predecessors, (2722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:05,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1560 states to 1560 states and 2722 transitions. [2021-11-07 02:01:05,675 INFO L78 Accepts]: Start accepts. Automaton has 1560 states and 2722 transitions. Word has length 67 [2021-11-07 02:01:05,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:01:05,676 INFO L470 AbstractCegarLoop]: Abstraction has 1560 states and 2722 transitions. [2021-11-07 02:01:05,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:05,676 INFO L276 IsEmpty]: Start isEmpty. Operand 1560 states and 2722 transitions. [2021-11-07 02:01:05,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 02:01:05,679 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:01:05,679 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 02:01:05,700 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-07 02:01:05,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:01:05,903 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:01:05,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:01:05,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1919647014, now seen corresponding path program 1 times [2021-11-07 02:01:05,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:01:05,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1310399977] [2021-11-07 02:01:05,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:05,905 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:01:05,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:01:05,907 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:01:05,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 02:01:06,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:06,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 502 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:01:06,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:01:06,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:01:06,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:01:06,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:01:06,742 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:01:06,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1310399977] [2021-11-07 02:01:06,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1310399977] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:01:06,742 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:01:06,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:01:06,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775479165] [2021-11-07 02:01:06,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:01:06,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:01:06,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:01:06,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:01:06,744 INFO L87 Difference]: Start difference. First operand 1560 states and 2722 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:06,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:01:06,969 INFO L93 Difference]: Finished difference Result 4289 states and 7490 transitions. [2021-11-07 02:01:06,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:01:06,970 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 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 02:01:06,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:01:06,987 INFO L225 Difference]: With dead ends: 4289 [2021-11-07 02:01:06,987 INFO L226 Difference]: Without dead ends: 2821 [2021-11-07 02:01:06,991 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:01:06,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2821 states. [2021-11-07 02:01:07,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2821 to 2018. [2021-11-07 02:01:07,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2018 states, 2012 states have (on average 1.771371769383698) internal successors, (3564), 2017 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:07,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2018 states to 2018 states and 3564 transitions. [2021-11-07 02:01:07,166 INFO L78 Accepts]: Start accepts. Automaton has 2018 states and 3564 transitions. Word has length 68 [2021-11-07 02:01:07,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:01:07,166 INFO L470 AbstractCegarLoop]: Abstraction has 2018 states and 3564 transitions. [2021-11-07 02:01:07,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:07,167 INFO L276 IsEmpty]: Start isEmpty. Operand 2018 states and 3564 transitions. [2021-11-07 02:01:07,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 02:01:07,170 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:01:07,171 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 02:01:07,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 02:01:07,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:01:07,387 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:01:07,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:01:07,388 INFO L85 PathProgramCache]: Analyzing trace with hash -37663243, now seen corresponding path program 1 times [2021-11-07 02:01:07,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:01:07,388 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2122989058] [2021-11-07 02:01:07,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:07,388 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:01:07,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:01:07,390 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:01:07,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 02:01:07,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:07,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:01:07,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:01:08,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:01:08,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:01:08,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:01:08,214 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:01:08,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2122989058] [2021-11-07 02:01:08,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2122989058] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:01:08,214 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:01:08,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:01:08,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645515173] [2021-11-07 02:01:08,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:01:08,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:01:08,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:01:08,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:01:08,216 INFO L87 Difference]: Start difference. First operand 2018 states and 3564 transitions. Second operand has 3 states, 3 states have (on average 23.0) 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 02:01:08,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:01:08,515 INFO L93 Difference]: Finished difference Result 5643 states and 9985 transitions. [2021-11-07 02:01:08,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:01:08,516 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) 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 02:01:08,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:01:08,539 INFO L225 Difference]: With dead ends: 5643 [2021-11-07 02:01:08,539 INFO L226 Difference]: Without dead ends: 3725 [2021-11-07 02:01:08,542 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:01:08,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3725 states. [2021-11-07 02:01:08,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3725 to 2922. [2021-11-07 02:01:08,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2922 states, 2916 states have (on average 1.7925240054869684) internal successors, (5227), 2921 states have internal predecessors, (5227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:08,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2922 states to 2922 states and 5227 transitions. [2021-11-07 02:01:08,791 INFO L78 Accepts]: Start accepts. Automaton has 2922 states and 5227 transitions. Word has length 69 [2021-11-07 02:01:08,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:01:08,791 INFO L470 AbstractCegarLoop]: Abstraction has 2922 states and 5227 transitions. [2021-11-07 02:01:08,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) 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 02:01:08,791 INFO L276 IsEmpty]: Start isEmpty. Operand 2922 states and 5227 transitions. [2021-11-07 02:01:08,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 02:01:08,797 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:01:08,797 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:01:08,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 02:01:09,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:01:09,011 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:01:09,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:01:09,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1750920053, now seen corresponding path program 1 times [2021-11-07 02:01:09,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:01:09,013 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1679545791] [2021-11-07 02:01:09,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:09,013 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:01:09,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:01:09,014 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:01:09,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 02:01:09,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:09,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:01:09,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:01:09,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:01:09,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:01:09,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:01:09,899 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:01:09,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1679545791] [2021-11-07 02:01:09,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1679545791] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:01:09,899 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:01:09,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:01:09,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955648692] [2021-11-07 02:01:09,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:01:09,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:01:09,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:01:09,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:01:09,901 INFO L87 Difference]: Start difference. First operand 2922 states and 5227 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:10,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:01:10,251 INFO L93 Difference]: Finished difference Result 8091 states and 14493 transitions. [2021-11-07 02:01:10,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:01:10,252 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-07 02:01:10,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:01:10,285 INFO L225 Difference]: With dead ends: 8091 [2021-11-07 02:01:10,285 INFO L226 Difference]: Without dead ends: 5303 [2021-11-07 02:01:10,289 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:01:10,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5303 states. [2021-11-07 02:01:10,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5303 to 4500. [2021-11-07 02:01:10,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4500 states, 4494 states have (on average 1.8086337338673788) internal successors, (8128), 4499 states have internal predecessors, (8128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:10,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4500 states to 4500 states and 8128 transitions. [2021-11-07 02:01:10,640 INFO L78 Accepts]: Start accepts. Automaton has 4500 states and 8128 transitions. Word has length 70 [2021-11-07 02:01:10,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:01:10,640 INFO L470 AbstractCegarLoop]: Abstraction has 4500 states and 8128 transitions. [2021-11-07 02:01:10,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:10,640 INFO L276 IsEmpty]: Start isEmpty. Operand 4500 states and 8128 transitions. [2021-11-07 02:01:10,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 02:01:10,646 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:01:10,646 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 02:01:10,661 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 02:01:10,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:01:10,861 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:01:10,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:01:10,861 INFO L85 PathProgramCache]: Analyzing trace with hash -224796762, now seen corresponding path program 1 times [2021-11-07 02:01:10,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:01:10,862 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [990209014] [2021-11-07 02:01:10,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:10,862 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:01:10,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:01:10,863 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:01:10,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 02:01:11,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:11,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:01:11,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:01:11,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:01:11,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:01:11,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:01:11,664 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:01:11,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [990209014] [2021-11-07 02:01:11,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [990209014] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:01:11,665 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:01:11,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:01:11,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8219119] [2021-11-07 02:01:11,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:01:11,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:01:11,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:01:11,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:01:11,666 INFO L87 Difference]: Start difference. First operand 4500 states and 8128 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:12,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:01:12,130 INFO L93 Difference]: Finished difference Result 12541 states and 22679 transitions. [2021-11-07 02:01:12,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:01:12,131 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 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 02:01:12,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:01:12,156 INFO L225 Difference]: With dead ends: 12541 [2021-11-07 02:01:12,156 INFO L226 Difference]: Without dead ends: 8209 [2021-11-07 02:01:12,164 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:01:12,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8209 states. [2021-11-07 02:01:12,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8209 to 7406. [2021-11-07 02:01:12,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7406 states, 7400 states have (on average 1.8195945945945946) internal successors, (13465), 7405 states have internal predecessors, (13465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:12,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7406 states to 7406 states and 13465 transitions. [2021-11-07 02:01:12,634 INFO L78 Accepts]: Start accepts. Automaton has 7406 states and 13465 transitions. Word has length 71 [2021-11-07 02:01:12,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:01:12,634 INFO L470 AbstractCegarLoop]: Abstraction has 7406 states and 13465 transitions. [2021-11-07 02:01:12,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:12,635 INFO L276 IsEmpty]: Start isEmpty. Operand 7406 states and 13465 transitions. [2021-11-07 02:01:12,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 02:01:12,676 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:01:12,676 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:01:12,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 02:01:12,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:01:12,877 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:01:12,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:01:12,877 INFO L85 PathProgramCache]: Analyzing trace with hash 120859654, now seen corresponding path program 1 times [2021-11-07 02:01:12,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:01:12,878 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [360222089] [2021-11-07 02:01:12,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:12,878 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:01:12,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:01:12,879 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:01:12,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 02:01:13,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:13,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:01:13,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:01:13,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:01:13,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:01:13,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:01:13,765 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:01:13,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [360222089] [2021-11-07 02:01:13,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [360222089] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:01:13,765 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:01:13,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:01:13,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553700609] [2021-11-07 02:01:13,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:01:13,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:01:13,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:01:13,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:01:13,767 INFO L87 Difference]: Start difference. First operand 7406 states and 13465 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:14,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:01:14,419 INFO L93 Difference]: Finished difference Result 21585 states and 39301 transitions. [2021-11-07 02:01:14,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:01:14,424 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-07 02:01:14,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:01:14,480 INFO L225 Difference]: With dead ends: 21585 [2021-11-07 02:01:14,480 INFO L226 Difference]: Without dead ends: 14355 [2021-11-07 02:01:14,493 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:01:14,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14355 states. [2021-11-07 02:01:15,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14355 to 13552. [2021-11-07 02:01:15,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13552 states, 13546 states have (on average 1.8268123431271224) internal successors, (24746), 13551 states have internal predecessors, (24746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:15,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13552 states to 13552 states and 24746 transitions. [2021-11-07 02:01:15,355 INFO L78 Accepts]: Start accepts. Automaton has 13552 states and 24746 transitions. Word has length 72 [2021-11-07 02:01:15,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:01:15,356 INFO L470 AbstractCegarLoop]: Abstraction has 13552 states and 24746 transitions. [2021-11-07 02:01:15,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:15,357 INFO L276 IsEmpty]: Start isEmpty. Operand 13552 states and 24746 transitions. [2021-11-07 02:01:15,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 02:01:15,366 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:01:15,366 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:01:15,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 02:01:15,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:01:15,580 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:01:15,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:01:15,580 INFO L85 PathProgramCache]: Analyzing trace with hash -2008239818, now seen corresponding path program 1 times [2021-11-07 02:01:15,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:01:15,581 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1820886548] [2021-11-07 02:01:15,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:15,581 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:01:15,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:01:15,582 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:01:15,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 02:01:16,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:16,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:01:16,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:01:16,329 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:01:16,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:01:16,631 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:01:16,631 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:01:16,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1820886548] [2021-11-07 02:01:16,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1820886548] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:01:16,632 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:01:16,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:01:16,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152557576] [2021-11-07 02:01:16,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:01:16,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:01:16,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:01:16,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:01:16,634 INFO L87 Difference]: Start difference. First operand 13552 states and 24746 transitions. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:19,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:01:19,807 INFO L93 Difference]: Finished difference Result 33753 states and 61603 transitions. [2021-11-07 02:01:19,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:01:19,808 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-07 02:01:19,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:01:19,872 INFO L225 Difference]: With dead ends: 33753 [2021-11-07 02:01:19,872 INFO L226 Difference]: Without dead ends: 20498 [2021-11-07 02:01:19,891 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:01:19,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20498 states. [2021-11-07 02:01:20,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20498 to 13519. [2021-11-07 02:01:20,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13519 states, 13513 states have (on average 1.8215052171982535) internal successors, (24614), 13518 states have internal predecessors, (24614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:20,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13519 states to 13519 states and 24614 transitions. [2021-11-07 02:01:20,897 INFO L78 Accepts]: Start accepts. Automaton has 13519 states and 24614 transitions. Word has length 73 [2021-11-07 02:01:20,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:01:20,898 INFO L470 AbstractCegarLoop]: Abstraction has 13519 states and 24614 transitions. [2021-11-07 02:01:20,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:20,898 INFO L276 IsEmpty]: Start isEmpty. Operand 13519 states and 24614 transitions. [2021-11-07 02:01:20,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 02:01:20,907 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:01:20,907 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 02:01:20,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 02:01:21,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:01:21,123 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:01:21,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:01:21,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1046552341, now seen corresponding path program 1 times [2021-11-07 02:01:21,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:01:21,125 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1878767657] [2021-11-07 02:01:21,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:21,125 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:01:21,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:01:21,126 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:01:21,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 02:01:21,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:21,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:01:21,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:01:21,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:01:21,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:01:22,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:01:22,148 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:01:22,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1878767657] [2021-11-07 02:01:22,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1878767657] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:01:22,148 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:01:22,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:01:22,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901588676] [2021-11-07 02:01:22,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:01:22,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:01:22,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:01:22,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:01:22,150 INFO L87 Difference]: Start difference. First operand 13519 states and 24614 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 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 02:01:23,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:01:23,026 INFO L93 Difference]: Finished difference Result 39756 states and 72455 transitions. [2021-11-07 02:01:23,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:01:23,027 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 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 02:01:23,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:01:23,102 INFO L225 Difference]: With dead ends: 39756 [2021-11-07 02:01:23,102 INFO L226 Difference]: Without dead ends: 26420 [2021-11-07 02:01:23,120 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:01:23,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26420 states. [2021-11-07 02:01:24,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26420 to 25617. [2021-11-07 02:01:24,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25617 states, 25611 states have (on average 1.824489477177775) internal successors, (46727), 25616 states have internal predecessors, (46727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:24,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25617 states to 25617 states and 46727 transitions. [2021-11-07 02:01:24,638 INFO L78 Accepts]: Start accepts. Automaton has 25617 states and 46727 transitions. Word has length 73 [2021-11-07 02:01:24,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:01:24,639 INFO L470 AbstractCegarLoop]: Abstraction has 25617 states and 46727 transitions. [2021-11-07 02:01:24,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 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 02:01:24,639 INFO L276 IsEmpty]: Start isEmpty. Operand 25617 states and 46727 transitions. [2021-11-07 02:01:24,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 02:01:24,651 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:01:24,652 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:01:24,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 02:01:24,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:01:24,868 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:01:24,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:01:24,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1208709589, now seen corresponding path program 1 times [2021-11-07 02:01:24,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:01:24,869 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [341682870] [2021-11-07 02:01:24,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:24,869 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:01:24,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:01:24,870 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:01:24,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 02:01:25,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:25,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:01:25,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:01:25,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:01:25,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:01:25,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:01:25,834 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:01:25,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [341682870] [2021-11-07 02:01:25,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [341682870] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:01:25,834 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:01:25,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:01:25,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986979391] [2021-11-07 02:01:25,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:01:25,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:01:25,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:01:25,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:01:25,836 INFO L87 Difference]: Start difference. First operand 25617 states and 46727 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:27,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:01:27,649 INFO L93 Difference]: Finished difference Result 70689 states and 128530 transitions. [2021-11-07 02:01:27,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:01:27,650 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-07 02:01:27,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:01:27,767 INFO L225 Difference]: With dead ends: 70689 [2021-11-07 02:01:27,767 INFO L226 Difference]: Without dead ends: 45302 [2021-11-07 02:01:27,796 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:01:27,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45302 states. [2021-11-07 02:01:30,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45302 to 44499. [2021-11-07 02:01:30,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44499 states, 44493 states have (on average 1.8140381633065876) internal successors, (80712), 44498 states have internal predecessors, (80712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:30,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44499 states to 44499 states and 80712 transitions. [2021-11-07 02:01:30,275 INFO L78 Accepts]: Start accepts. Automaton has 44499 states and 80712 transitions. Word has length 74 [2021-11-07 02:01:30,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:01:30,276 INFO L470 AbstractCegarLoop]: Abstraction has 44499 states and 80712 transitions. [2021-11-07 02:01:30,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:30,276 INFO L276 IsEmpty]: Start isEmpty. Operand 44499 states and 80712 transitions. [2021-11-07 02:01:30,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 02:01:30,476 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:01:30,477 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:01:30,493 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 02:01:30,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:01:30,677 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:01:30,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:01:30,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1975097084, now seen corresponding path program 1 times [2021-11-07 02:01:30,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:01:30,678 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [129571881] [2021-11-07 02:01:30,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:30,679 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:01:30,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:01:30,680 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:01:30,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 02:01:31,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:31,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:01:31,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:01:31,618 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 02:01:31,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:01:31,861 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 02:01:31,861 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:01:31,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [129571881] [2021-11-07 02:01:31,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [129571881] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:01:31,861 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:01:31,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:01:31,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983680557] [2021-11-07 02:01:31,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:01:31,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:01:31,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:01:31,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:01:31,863 INFO L87 Difference]: Start difference. First operand 44499 states and 80712 transitions. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:39,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:01:39,142 INFO L93 Difference]: Finished difference Result 173264 states and 314149 transitions. [2021-11-07 02:01:39,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 02:01:39,142 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 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 02:01:39,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:01:39,446 INFO L225 Difference]: With dead ends: 173264 [2021-11-07 02:01:39,446 INFO L226 Difference]: Without dead ends: 129061 [2021-11-07 02:01:39,498 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:01:39,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129061 states. [2021-11-07 02:01:42,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129061 to 44241. [2021-11-07 02:01:42,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44241 states, 44235 states have (on average 1.8012885723974228) internal successors, (79680), 44240 states have internal predecessors, (79680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:42,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44241 states to 44241 states and 79680 transitions. [2021-11-07 02:01:42,775 INFO L78 Accepts]: Start accepts. Automaton has 44241 states and 79680 transitions. Word has length 75 [2021-11-07 02:01:42,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:01:42,776 INFO L470 AbstractCegarLoop]: Abstraction has 44241 states and 79680 transitions. [2021-11-07 02:01:42,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:42,776 INFO L276 IsEmpty]: Start isEmpty. Operand 44241 states and 79680 transitions. [2021-11-07 02:01:42,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 02:01:42,786 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:01:42,786 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:01:42,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 02:01:43,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:01:43,002 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:01:43,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:01:43,002 INFO L85 PathProgramCache]: Analyzing trace with hash 2019486874, now seen corresponding path program 1 times [2021-11-07 02:01:43,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:01:43,003 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1605404934] [2021-11-07 02:01:43,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:43,003 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:01:43,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:01:43,004 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:01:43,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 02:01:43,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:43,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:01:43,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:01:43,849 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:01:43,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:01:44,015 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:01:44,015 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:01:44,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1605404934] [2021-11-07 02:01:44,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1605404934] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:01:44,016 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:01:44,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:01:44,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360050453] [2021-11-07 02:01:44,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:01:44,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:01:44,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:01:44,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:01:44,018 INFO L87 Difference]: Start difference. First operand 44241 states and 79680 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:46,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:01:46,101 INFO L93 Difference]: Finished difference Result 88983 states and 160198 transitions. [2021-11-07 02:01:46,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:01:46,101 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-07 02:01:46,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:01:46,174 INFO L225 Difference]: With dead ends: 88983 [2021-11-07 02:01:46,175 INFO L226 Difference]: Without dead ends: 45044 [2021-11-07 02:01:46,204 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:01:46,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45044 states. [2021-11-07 02:01:48,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45044 to 44241. [2021-11-07 02:01:48,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44241 states, 44235 states have (on average 1.7983949361365434) internal successors, (79552), 44240 states have internal predecessors, (79552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:48,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44241 states to 44241 states and 79552 transitions. [2021-11-07 02:01:48,493 INFO L78 Accepts]: Start accepts. Automaton has 44241 states and 79552 transitions. Word has length 75 [2021-11-07 02:01:48,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:01:48,494 INFO L470 AbstractCegarLoop]: Abstraction has 44241 states and 79552 transitions. [2021-11-07 02:01:48,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:48,494 INFO L276 IsEmpty]: Start isEmpty. Operand 44241 states and 79552 transitions. [2021-11-07 02:01:48,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 02:01:48,500 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:01:48,500 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 02:01:48,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 02:01:48,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:01:48,701 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:01:48,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:01:48,704 INFO L85 PathProgramCache]: Analyzing trace with hash -440952569, now seen corresponding path program 1 times [2021-11-07 02:01:48,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:01:48,704 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1352919179] [2021-11-07 02:01:48,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:48,705 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:01:48,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:01:48,716 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:01:48,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa83f1c3-7d10-472c-9bcd-f4e4c71dc520/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 02:01:49,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:49,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:01:49,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:01:49,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:01:49,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:01:49,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:01:49,805 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:01:49,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1352919179] [2021-11-07 02:01:49,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1352919179] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:01:49,806 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:01:49,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:01:49,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760682088] [2021-11-07 02:01:49,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:01:49,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:01:49,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:01:49,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:01:49,808 INFO L87 Difference]: Start difference. First operand 44241 states and 79552 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:53,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:01:53,485 INFO L93 Difference]: Finished difference Result 124225 states and 223120 transitions. [2021-11-07 02:01:53,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:01:53,485 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-07 02:01:53,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:01:53,619 INFO L225 Difference]: With dead ends: 124225 [2021-11-07 02:01:53,619 INFO L226 Difference]: Without dead ends: 80246 [2021-11-07 02:01:53,644 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:01:53,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80246 states.