./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test4-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test4-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e095bb5ea0d924a9f9ab04ab393eec77de9b1aa4e50357711d33ebab16e651dd --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 05:33:47,586 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 05:33:47,588 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 05:33:47,624 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 05:33:47,624 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 05:33:47,629 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 05:33:47,632 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 05:33:47,636 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 05:33:47,638 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 05:33:47,644 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 05:33:47,645 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 05:33:47,647 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 05:33:47,647 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 05:33:47,649 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 05:33:47,651 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 05:33:47,653 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 05:33:47,655 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 05:33:47,656 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 05:33:47,660 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 05:33:47,667 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 05:33:47,669 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 05:33:47,671 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 05:33:47,672 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 05:33:47,673 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 05:33:47,677 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 05:33:47,677 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 05:33:47,678 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 05:33:47,679 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 05:33:47,679 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 05:33:47,680 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 05:33:47,681 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 05:33:47,682 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 05:33:47,683 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 05:33:47,684 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 05:33:47,685 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 05:33:47,685 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 05:33:47,686 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 05:33:47,686 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 05:33:47,686 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 05:33:47,687 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 05:33:47,688 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 05:33:47,689 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-03 05:33:47,712 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 05:33:47,712 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 05:33:47,713 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 05:33:47,713 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 05:33:47,714 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 05:33:47,714 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 05:33:47,714 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 05:33:47,714 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 05:33:47,714 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 05:33:47,715 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 05:33:47,715 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 05:33:47,715 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 05:33:47,716 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 05:33:47,716 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 05:33:47,716 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 05:33:47,717 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-03 05:33:47,717 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-03 05:33:47,717 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 05:33:47,717 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 05:33:47,718 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-03 05:33:47,718 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 05:33:47,718 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 05:33:47,718 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 05:33:47,719 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-03 05:33:47,719 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-03 05:33:47,719 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-03 05:33:47,719 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 05:33:47,720 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 05:33:47,720 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 05:33:47,720 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 05:33:47,720 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 05:33:47,721 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 05:33:47,721 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:33:47,721 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 05:33:47,721 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 05:33:47,722 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 05:33:47,722 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 05:33:47,722 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 05:33:47,722 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 05:33:47,723 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_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e095bb5ea0d924a9f9ab04ab393eec77de9b1aa4e50357711d33ebab16e651dd [2021-11-03 05:33:47,944 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 05:33:47,967 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 05:33:47,970 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 05:33:47,971 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 05:33:47,972 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 05:33:47,973 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test4-2.i [2021-11-03 05:33:48,047 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/data/4c4e7a4a0/749fc4fd321545629ef3b48d80cc616e/FLAGd833bcdd8 [2021-11-03 05:33:48,627 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 05:33:48,628 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test4-2.i [2021-11-03 05:33:48,664 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/data/4c4e7a4a0/749fc4fd321545629ef3b48d80cc616e/FLAGd833bcdd8 [2021-11-03 05:33:48,848 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/data/4c4e7a4a0/749fc4fd321545629ef3b48d80cc616e [2021-11-03 05:33:48,850 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 05:33:48,851 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 05:33:48,853 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 05:33:48,854 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 05:33:48,857 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 05:33:48,857 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:33:48" (1/1) ... [2021-11-03 05:33:48,858 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@179bfc84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:33:48, skipping insertion in model container [2021-11-03 05:33:48,859 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:33:48" (1/1) ... [2021-11-03 05:33:48,870 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 05:33:48,964 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:33:49,470 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_b41f42e3-b463-4721-9cd3-03d09e1c5700/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test4-2.i[33021,33034] [2021-11-03 05:33:49,664 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:33:49,673 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) [2021-11-03 05:33:49,674 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@a633d3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:33:49, skipping insertion in model container [2021-11-03 05:33:49,674 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 05:33:49,675 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-03 05:33:49,677 INFO L168 Benchmark]: Toolchain (without parser) took 824.46 ms. Allocated memory was 100.7 MB in the beginning and 132.1 MB in the end (delta: 31.5 MB). Free memory was 63.4 MB in the beginning and 93.7 MB in the end (delta: -30.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-03 05:33:49,678 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 100.7 MB. Free memory is still 52.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 05:33:49,679 INFO L168 Benchmark]: CACSL2BoogieTranslator took 821.36 ms. Allocated memory was 100.7 MB in the beginning and 132.1 MB in the end (delta: 31.5 MB). Free memory was 63.2 MB in the beginning and 93.7 MB in the end (delta: -30.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-03 05:33:49,680 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 100.7 MB. Free memory is still 52.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 821.36 ms. Allocated memory was 100.7 MB in the beginning and 132.1 MB in the end (delta: 31.5 MB). Free memory was 63.2 MB in the beginning and 93.7 MB in the end (delta: -30.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 752]: 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_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test4-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e095bb5ea0d924a9f9ab04ab393eec77de9b1aa4e50357711d33ebab16e651dd --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 05:33:51,896 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 05:33:51,898 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 05:33:51,929 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 05:33:51,930 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 05:33:51,931 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 05:33:51,933 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 05:33:51,935 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 05:33:51,937 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 05:33:51,938 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 05:33:51,940 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 05:33:51,941 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 05:33:51,942 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 05:33:51,943 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 05:33:51,944 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 05:33:51,946 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 05:33:51,947 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 05:33:51,948 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 05:33:51,950 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 05:33:51,953 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 05:33:51,955 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 05:33:51,956 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 05:33:51,958 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 05:33:51,959 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 05:33:51,963 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 05:33:51,964 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 05:33:51,964 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 05:33:51,966 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 05:33:51,966 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 05:33:51,967 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 05:33:51,968 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 05:33:51,969 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 05:33:51,970 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 05:33:51,970 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 05:33:51,972 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 05:33:51,972 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 05:33:51,973 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 05:33:51,980 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 05:33:51,983 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 05:33:51,986 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 05:33:51,987 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 05:33:51,988 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-03 05:33:52,036 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 05:33:52,037 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 05:33:52,038 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 05:33:52,038 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 05:33:52,039 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 05:33:52,039 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 05:33:52,039 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 05:33:52,039 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 05:33:52,039 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 05:33:52,041 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-03 05:33:52,042 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-03 05:33:52,042 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 05:33:52,042 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 05:33:52,043 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-03 05:33:52,043 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 05:33:52,043 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 05:33:52,043 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 05:33:52,043 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-03 05:33:52,044 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-03 05:33:52,044 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-03 05:33:52,044 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 05:33:52,044 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 05:33:52,045 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 05:33:52,045 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 05:33:52,045 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 05:33:52,045 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 05:33:52,045 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 05:33:52,046 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 05:33:52,046 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 05:33:52,046 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:33:52,046 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 05:33:52,047 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 05:33:52,047 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 05:33:52,047 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 05:33:52,048 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 05:33:52,048 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 05:33:52,048 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_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e095bb5ea0d924a9f9ab04ab393eec77de9b1aa4e50357711d33ebab16e651dd [2021-11-03 05:33:52,419 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 05:33:52,440 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 05:33:52,442 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 05:33:52,444 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 05:33:52,444 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 05:33:52,445 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test4-2.i [2021-11-03 05:33:52,518 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/data/5d07f5bc2/3f70119bb5734dcfa2943bf2c354d341/FLAG54b4959d4 [2021-11-03 05:33:53,083 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 05:33:53,083 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test4-2.i [2021-11-03 05:33:53,114 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/data/5d07f5bc2/3f70119bb5734dcfa2943bf2c354d341/FLAG54b4959d4 [2021-11-03 05:33:53,366 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/data/5d07f5bc2/3f70119bb5734dcfa2943bf2c354d341 [2021-11-03 05:33:53,370 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 05:33:53,372 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 05:33:53,374 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 05:33:53,374 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 05:33:53,377 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 05:33:53,378 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:33:53" (1/1) ... [2021-11-03 05:33:53,380 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@532d5295 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:33:53, skipping insertion in model container [2021-11-03 05:33:53,381 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:33:53" (1/1) ... [2021-11-03 05:33:53,387 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 05:33:53,460 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:33:53,920 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_b41f42e3-b463-4721-9cd3-03d09e1c5700/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test4-2.i[33021,33034] [2021-11-03 05:33:54,073 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:33:54,094 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-03 05:33:54,121 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:33:54,153 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_b41f42e3-b463-4721-9cd3-03d09e1c5700/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test4-2.i[33021,33034] [2021-11-03 05:33:54,296 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:33:54,314 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 05:33:54,338 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_b41f42e3-b463-4721-9cd3-03d09e1c5700/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test4-2.i[33021,33034] [2021-11-03 05:33:54,406 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:33:54,482 INFO L208 MainTranslator]: Completed translation [2021-11-03 05:33:54,482 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:33:54 WrapperNode [2021-11-03 05:33:54,483 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 05:33:54,484 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 05:33:54,484 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 05:33:54,484 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 05:33:54,492 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:33:54" (1/1) ... [2021-11-03 05:33:54,566 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:33:54" (1/1) ... [2021-11-03 05:33:54,671 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 05:33:54,672 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 05:33:54,673 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 05:33:54,673 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 05:33:54,681 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:33:54" (1/1) ... [2021-11-03 05:33:54,682 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:33:54" (1/1) ... [2021-11-03 05:33:54,698 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:33:54" (1/1) ... [2021-11-03 05:33:54,699 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:33:54" (1/1) ... [2021-11-03 05:33:54,784 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:33:54" (1/1) ... [2021-11-03 05:33:54,811 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:33:54" (1/1) ... [2021-11-03 05:33:54,820 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:33:54" (1/1) ... [2021-11-03 05:33:54,833 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 05:33:54,844 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 05:33:54,844 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 05:33:54,845 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 05:33:54,845 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:33:54" (1/1) ... [2021-11-03 05:33:54,852 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:33:54,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:33:54,876 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 05:33:54,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 05:33:54,919 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-03 05:33:54,919 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-03 05:33:54,919 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-03 05:33:54,919 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-03 05:33:54,920 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 05:33:54,920 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-03 05:33:54,920 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-03 05:33:54,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-03 05:33:54,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-03 05:33:54,920 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 05:33:54,920 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 05:34:01,096 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 05:34:01,096 INFO L299 CfgBuilder]: Removed 107 assume(true) statements. [2021-11-03 05:34:01,099 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:34:01 BoogieIcfgContainer [2021-11-03 05:34:01,100 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 05:34:01,101 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 05:34:01,102 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 05:34:01,104 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 05:34:01,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 05:33:53" (1/3) ... [2021-11-03 05:34:01,105 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a1c4fc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:34:01, skipping insertion in model container [2021-11-03 05:34:01,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:33:54" (2/3) ... [2021-11-03 05:34:01,106 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a1c4fc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:34:01, skipping insertion in model container [2021-11-03 05:34:01,106 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:34:01" (3/3) ... [2021-11-03 05:34:01,107 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_OAT_test4-2.i [2021-11-03 05:34:01,112 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 05:34:01,112 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 762 error locations. [2021-11-03 05:34:01,154 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 05:34:01,159 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 [2021-11-03 05:34:01,159 INFO L340 AbstractCegarLoop]: Starting to check reachability of 762 error locations. [2021-11-03 05:34:01,205 INFO L276 IsEmpty]: Start isEmpty. Operand has 1500 states, 737 states have (on average 2.255088195386703) internal successors, (1662), 1499 states have internal predecessors, (1662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:34:01,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-03 05:34:01,211 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:34:01,211 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-03 05:34:01,212 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 758 more)] === [2021-11-03 05:34:01,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:34:01,216 INFO L85 PathProgramCache]: Analyzing trace with hash 28698764, now seen corresponding path program 1 times [2021-11-03 05:34:01,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:34:01,226 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1747072964] [2021-11-03 05:34:01,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:34:01,226 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:34:01,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:34:01,227 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:34:01,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 05:34:01,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:34:01,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-03 05:34:01,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:34:01,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:34:01,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:34:01,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:34:01,463 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:34:01,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1747072964] [2021-11-03 05:34:01,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1747072964] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:34:01,476 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:34:01,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 05:34:01,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953384224] [2021-11-03 05:34:01,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-03 05:34:01,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:34:01,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-03 05:34:01,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 05:34:01,499 INFO L87 Difference]: Start difference. First operand has 1500 states, 737 states have (on average 2.255088195386703) internal successors, (1662), 1499 states have internal predecessors, (1662), 0 states have call successors, (0), 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 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:34:01,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:34:01,590 INFO L93 Difference]: Finished difference Result 1482 states and 1558 transitions. [2021-11-03 05:34:01,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-03 05:34:01,592 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2021-11-03 05:34:01,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:34:01,628 INFO L225 Difference]: With dead ends: 1482 [2021-11-03 05:34:01,629 INFO L226 Difference]: Without dead ends: 1480 [2021-11-03 05:34:01,630 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 05:34:01,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1480 states. [2021-11-03 05:34:01,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1480 to 1480. [2021-11-03 05:34:01,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1480 states, 728 states have (on average 2.1373626373626373) internal successors, (1556), 1479 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:34:01,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1480 states to 1480 states and 1556 transitions. [2021-11-03 05:34:01,771 INFO L78 Accepts]: Start accepts. Automaton has 1480 states and 1556 transitions. Word has length 5 [2021-11-03 05:34:01,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:34:01,771 INFO L470 AbstractCegarLoop]: Abstraction has 1480 states and 1556 transitions. [2021-11-03 05:34:01,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:34:01,772 INFO L276 IsEmpty]: Start isEmpty. Operand 1480 states and 1556 transitions. [2021-11-03 05:34:01,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-03 05:34:01,772 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:34:01,772 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-03 05:34:01,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-03 05:34:01,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:34:01,984 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 758 more)] === [2021-11-03 05:34:01,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:34:01,985 INFO L85 PathProgramCache]: Analyzing trace with hash 28698826, now seen corresponding path program 1 times [2021-11-03 05:34:01,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:34:01,986 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1105728980] [2021-11-03 05:34:01,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:34:01,986 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:34:01,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:34:01,994 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:34:02,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 05:34:02,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:34:02,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:34:02,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:34:02,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 05:34:02,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:34:02,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:34:02,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:34:02,318 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:34:02,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1105728980] [2021-11-03 05:34:02,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1105728980] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:34:02,319 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:34:02,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 05:34:02,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132125940] [2021-11-03 05:34:02,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:34:02,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:34:02,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:34:02,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:34:02,322 INFO L87 Difference]: Start difference. First operand 1480 states and 1556 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:34:04,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:34:04,916 INFO L93 Difference]: Finished difference Result 1517 states and 1606 transitions. [2021-11-03 05:34:04,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:34:04,917 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2021-11-03 05:34:04,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:34:04,925 INFO L225 Difference]: With dead ends: 1517 [2021-11-03 05:34:04,925 INFO L226 Difference]: Without dead ends: 1517 [2021-11-03 05:34:04,926 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:34:04,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1517 states. [2021-11-03 05:34:04,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1517 to 1463. [2021-11-03 05:34:04,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1463 states, 804 states have (on average 1.9875621890547264) internal successors, (1598), 1462 states have internal predecessors, (1598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:34:04,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1463 states to 1463 states and 1598 transitions. [2021-11-03 05:34:04,962 INFO L78 Accepts]: Start accepts. Automaton has 1463 states and 1598 transitions. Word has length 5 [2021-11-03 05:34:04,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:34:04,962 INFO L470 AbstractCegarLoop]: Abstraction has 1463 states and 1598 transitions. [2021-11-03 05:34:04,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:34:04,962 INFO L276 IsEmpty]: Start isEmpty. Operand 1463 states and 1598 transitions. [2021-11-03 05:34:04,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-03 05:34:04,963 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:34:04,963 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-03 05:34:04,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-03 05:34:05,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:34:05,174 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 758 more)] === [2021-11-03 05:34:05,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:34:05,175 INFO L85 PathProgramCache]: Analyzing trace with hash 28698827, now seen corresponding path program 1 times [2021-11-03 05:34:05,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:34:05,175 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1305104066] [2021-11-03 05:34:05,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:34:05,176 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:34:05,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:34:05,179 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:34:05,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-03 05:34:05,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:34:05,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:34:05,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:34:05,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 05:34:05,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:34:05,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:34:05,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:34:05,449 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:34:05,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1305104066] [2021-11-03 05:34:05,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1305104066] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:34:05,450 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:34:05,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-03 05:34:05,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546481241] [2021-11-03 05:34:05,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:34:05,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:34:05,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:34:05,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:34:05,452 INFO L87 Difference]: Start difference. First operand 1463 states and 1598 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:34:11,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:34:11,871 INFO L93 Difference]: Finished difference Result 1820 states and 1976 transitions. [2021-11-03 05:34:11,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:34:11,872 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 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 5 [2021-11-03 05:34:11,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:34:11,882 INFO L225 Difference]: With dead ends: 1820 [2021-11-03 05:34:11,882 INFO L226 Difference]: Without dead ends: 1820 [2021-11-03 05:34:11,882 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:34:11,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1820 states. [2021-11-03 05:34:11,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1820 to 1619. [2021-11-03 05:34:11,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1619 states, 970 states have (on average 1.9628865979381442) internal successors, (1904), 1618 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:34:11,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1619 states to 1619 states and 1904 transitions. [2021-11-03 05:34:11,924 INFO L78 Accepts]: Start accepts. Automaton has 1619 states and 1904 transitions. Word has length 5 [2021-11-03 05:34:11,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:34:11,925 INFO L470 AbstractCegarLoop]: Abstraction has 1619 states and 1904 transitions. [2021-11-03 05:34:11,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:34:11,925 INFO L276 IsEmpty]: Start isEmpty. Operand 1619 states and 1904 transitions. [2021-11-03 05:34:11,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-03 05:34:11,926 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:34:11,926 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-03 05:34:11,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-03 05:34:12,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:34:12,147 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr640REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 758 more)] === [2021-11-03 05:34:12,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:34:12,147 INFO L85 PathProgramCache]: Analyzing trace with hash 891404513, now seen corresponding path program 1 times [2021-11-03 05:34:12,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:34:12,148 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1003351954] [2021-11-03 05:34:12,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:34:12,148 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:34:12,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:34:12,152 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:34:12,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-03 05:34:12,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:34:12,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:34:12,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:34:12,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:34:12,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:34:12,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:34:12,334 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:34:12,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1003351954] [2021-11-03 05:34:12,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1003351954] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:34:12,335 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:34:12,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 05:34:12,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665611739] [2021-11-03 05:34:12,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:34:12,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:34:12,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:34:12,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:34:12,338 INFO L87 Difference]: Start difference. First operand 1619 states and 1904 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:34:12,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:34:12,445 INFO L93 Difference]: Finished difference Result 2982 states and 3530 transitions. [2021-11-03 05:34:12,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:34:12,445 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 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 6 [2021-11-03 05:34:12,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:34:12,461 INFO L225 Difference]: With dead ends: 2982 [2021-11-03 05:34:12,461 INFO L226 Difference]: Without dead ends: 2982 [2021-11-03 05:34:12,462 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:34:12,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2982 states. [2021-11-03 05:34:12,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2982 to 2453. [2021-11-03 05:34:12,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2453 states, 1804 states have (on average 1.9567627494456763) internal successors, (3530), 2452 states have internal predecessors, (3530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:34:12,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2453 states to 2453 states and 3530 transitions. [2021-11-03 05:34:12,525 INFO L78 Accepts]: Start accepts. Automaton has 2453 states and 3530 transitions. Word has length 6 [2021-11-03 05:34:12,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:34:12,525 INFO L470 AbstractCegarLoop]: Abstraction has 2453 states and 3530 transitions. [2021-11-03 05:34:12,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:34:12,525 INFO L276 IsEmpty]: Start isEmpty. Operand 2453 states and 3530 transitions. [2021-11-03 05:34:12,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-03 05:34:12,526 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:34:12,526 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:34:12,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-03 05:34:12,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:34:12,738 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 758 more)] === [2021-11-03 05:34:12,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:34:12,738 INFO L85 PathProgramCache]: Analyzing trace with hash 2013913556, now seen corresponding path program 1 times [2021-11-03 05:34:12,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:34:12,739 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [379109750] [2021-11-03 05:34:12,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:34:12,740 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:34:12,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:34:12,744 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:34:12,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-03 05:34:12,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:34:12,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:34:12,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:34:12,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:34:12,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:34:13,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:34:13,004 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:34:13,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [379109750] [2021-11-03 05:34:13,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [379109750] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:34:13,012 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:34:13,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 05:34:13,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40158883] [2021-11-03 05:34:13,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:34:13,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:34:13,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:34:13,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:34:13,014 INFO L87 Difference]: Start difference. First operand 2453 states and 3530 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:34:13,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:34:13,052 INFO L93 Difference]: Finished difference Result 2393 states and 3444 transitions. [2021-11-03 05:34:13,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:34:13,052 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 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 11 [2021-11-03 05:34:13,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:34:13,066 INFO L225 Difference]: With dead ends: 2393 [2021-11-03 05:34:13,067 INFO L226 Difference]: Without dead ends: 2393 [2021-11-03 05:34:13,067 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:34:13,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2393 states. [2021-11-03 05:34:13,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2393 to 2393. [2021-11-03 05:34:13,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2393 states, 1768 states have (on average 1.9479638009049773) internal successors, (3444), 2392 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:34:13,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2393 states to 2393 states and 3444 transitions. [2021-11-03 05:34:13,126 INFO L78 Accepts]: Start accepts. Automaton has 2393 states and 3444 transitions. Word has length 11 [2021-11-03 05:34:13,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:34:13,127 INFO L470 AbstractCegarLoop]: Abstraction has 2393 states and 3444 transitions. [2021-11-03 05:34:13,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:34:13,127 INFO L276 IsEmpty]: Start isEmpty. Operand 2393 states and 3444 transitions. [2021-11-03 05:34:13,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-03 05:34:13,128 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:34:13,128 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:34:13,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-03 05:34:13,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:34:13,340 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 758 more)] === [2021-11-03 05:34:13,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:34:13,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1659327634, now seen corresponding path program 1 times [2021-11-03 05:34:13,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:34:13,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [905581683] [2021-11-03 05:34:13,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:34:13,341 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:34:13,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:34:13,343 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:34:13,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-03 05:34:13,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:34:13,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:34:13,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:34:13,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:34:13,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:34:13,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:34:13,621 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:34:13,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [905581683] [2021-11-03 05:34:13,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [905581683] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:34:13,621 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:34:13,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 05:34:13,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800284098] [2021-11-03 05:34:13,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:34:13,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:34:13,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:34:13,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:34:13,623 INFO L87 Difference]: Start difference. First operand 2393 states and 3444 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:34:13,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:34:13,718 INFO L93 Difference]: Finished difference Result 2365 states and 3388 transitions. [2021-11-03 05:34:13,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:34:13,718 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 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 13 [2021-11-03 05:34:13,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:34:13,731 INFO L225 Difference]: With dead ends: 2365 [2021-11-03 05:34:13,731 INFO L226 Difference]: Without dead ends: 2365 [2021-11-03 05:34:13,731 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:34:13,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2365 states. [2021-11-03 05:34:13,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2365 to 2363. [2021-11-03 05:34:13,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2363 states, 1752 states have (on average 1.932648401826484) internal successors, (3386), 2362 states have internal predecessors, (3386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:34:13,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2363 states to 2363 states and 3386 transitions. [2021-11-03 05:34:13,789 INFO L78 Accepts]: Start accepts. Automaton has 2363 states and 3386 transitions. Word has length 13 [2021-11-03 05:34:13,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:34:13,789 INFO L470 AbstractCegarLoop]: Abstraction has 2363 states and 3386 transitions. [2021-11-03 05:34:13,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:34:13,789 INFO L276 IsEmpty]: Start isEmpty. Operand 2363 states and 3386 transitions. [2021-11-03 05:34:13,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-03 05:34:13,790 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:34:13,791 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] [2021-11-03 05:34:13,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-03 05:34:14,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:34:14,008 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr42REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 758 more)] === [2021-11-03 05:34:14,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:34:14,008 INFO L85 PathProgramCache]: Analyzing trace with hash 913198236, now seen corresponding path program 1 times [2021-11-03 05:34:14,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:34:14,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1491774665] [2021-11-03 05:34:14,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:34:14,009 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:34:14,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:34:14,011 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:34:14,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-03 05:34:14,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:34:14,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:34:14,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:34:14,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 05:34:14,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:34:14,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:34:14,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:34:14,467 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:34:14,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1491774665] [2021-11-03 05:34:14,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1491774665] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:34:14,467 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:34:14,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 05:34:14,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32864665] [2021-11-03 05:34:14,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:34:14,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:34:14,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:34:14,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:34:14,469 INFO L87 Difference]: Start difference. First operand 2363 states and 3386 transitions. Second operand has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:34:17,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:34:17,944 INFO L93 Difference]: Finished difference Result 3233 states and 4440 transitions. [2021-11-03 05:34:17,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 05:34:17,945 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 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 27 [2021-11-03 05:34:17,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:34:17,962 INFO L225 Difference]: With dead ends: 3233 [2021-11-03 05:34:17,962 INFO L226 Difference]: Without dead ends: 3233 [2021-11-03 05:34:17,962 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:34:17,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3233 states. [2021-11-03 05:34:18,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3233 to 2359. [2021-11-03 05:34:18,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2359 states, 1752 states have (on average 1.928082191780822) internal successors, (3378), 2358 states have internal predecessors, (3378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:34:18,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2359 states to 2359 states and 3378 transitions. [2021-11-03 05:34:18,021 INFO L78 Accepts]: Start accepts. Automaton has 2359 states and 3378 transitions. Word has length 27 [2021-11-03 05:34:18,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:34:18,021 INFO L470 AbstractCegarLoop]: Abstraction has 2359 states and 3378 transitions. [2021-11-03 05:34:18,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:34:18,022 INFO L276 IsEmpty]: Start isEmpty. Operand 2359 states and 3378 transitions. [2021-11-03 05:34:18,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-03 05:34:18,023 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:34:18,023 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] [2021-11-03 05:34:18,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-03 05:34:18,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:34:18,238 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr43REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 758 more)] === [2021-11-03 05:34:18,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:34:18,238 INFO L85 PathProgramCache]: Analyzing trace with hash 913198237, now seen corresponding path program 1 times [2021-11-03 05:34:18,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:34:18,238 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1017009096] [2021-11-03 05:34:18,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:34:18,239 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:34:18,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:34:18,240 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:34:18,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-03 05:34:18,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:34:18,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:34:18,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:34:18,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 05:34:18,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:34:18,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:34:19,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:34:19,137 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:34:19,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1017009096] [2021-11-03 05:34:19,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1017009096] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:34:19,137 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:34:19,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-03 05:34:19,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989776421] [2021-11-03 05:34:19,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:34:19,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:34:19,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:34:19,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:34:19,138 INFO L87 Difference]: Start difference. First operand 2359 states and 3378 transitions. Second operand has 6 states, 5 states have (on average 10.4) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:34:27,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:34:27,822 INFO L93 Difference]: Finished difference Result 2858 states and 3793 transitions. [2021-11-03 05:34:27,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 05:34:27,823 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.4) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 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 27 [2021-11-03 05:34:27,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:34:27,834 INFO L225 Difference]: With dead ends: 2858 [2021-11-03 05:34:27,834 INFO L226 Difference]: Without dead ends: 2858 [2021-11-03 05:34:27,834 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-03 05:34:27,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2858 states. [2021-11-03 05:34:27,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2858 to 2355. [2021-11-03 05:34:27,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2355 states, 1752 states have (on average 1.92351598173516) internal successors, (3370), 2354 states have internal predecessors, (3370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:34:27,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2355 states to 2355 states and 3370 transitions. [2021-11-03 05:34:27,883 INFO L78 Accepts]: Start accepts. Automaton has 2355 states and 3370 transitions. Word has length 27 [2021-11-03 05:34:27,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:34:27,883 INFO L470 AbstractCegarLoop]: Abstraction has 2355 states and 3370 transitions. [2021-11-03 05:34:27,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.4) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:34:27,884 INFO L276 IsEmpty]: Start isEmpty. Operand 2355 states and 3370 transitions. [2021-11-03 05:34:27,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-03 05:34:27,885 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:34:27,885 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:34:27,904 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-03 05:34:28,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:34:28,097 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr107REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 758 more)] === [2021-11-03 05:34:28,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:34:28,097 INFO L85 PathProgramCache]: Analyzing trace with hash 944973104, now seen corresponding path program 1 times [2021-11-03 05:34:28,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:34:28,098 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [244464518] [2021-11-03 05:34:28,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:34:28,098 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:34:28,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:34:28,099 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:34:28,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-03 05:34:28,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:34:28,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:34:28,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:34:28,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:34:28,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:34:28,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:34:28,621 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:34:28,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [244464518] [2021-11-03 05:34:28,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [244464518] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:34:28,621 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:34:28,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 05:34:28,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323586844] [2021-11-03 05:34:28,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:34:28,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:34:28,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:34:28,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:34:28,623 INFO L87 Difference]: Start difference. First operand 2355 states and 3370 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:34:28,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:34:28,690 INFO L93 Difference]: Finished difference Result 2343 states and 3350 transitions. [2021-11-03 05:34:28,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:34:28,691 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 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 42 [2021-11-03 05:34:28,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:34:28,703 INFO L225 Difference]: With dead ends: 2343 [2021-11-03 05:34:28,703 INFO L226 Difference]: Without dead ends: 2343 [2021-11-03 05:34:28,707 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:34:28,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2343 states. [2021-11-03 05:34:28,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2343 to 2343. [2021-11-03 05:34:28,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2343 states, 1740 states have (on average 1.9252873563218391) internal successors, (3350), 2342 states have internal predecessors, (3350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:34:28,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2343 states to 2343 states and 3350 transitions. [2021-11-03 05:34:28,751 INFO L78 Accepts]: Start accepts. Automaton has 2343 states and 3350 transitions. Word has length 42 [2021-11-03 05:34:28,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:34:28,753 INFO L470 AbstractCegarLoop]: Abstraction has 2343 states and 3350 transitions. [2021-11-03 05:34:28,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:34:28,753 INFO L276 IsEmpty]: Start isEmpty. Operand 2343 states and 3350 transitions. [2021-11-03 05:34:28,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-03 05:34:28,757 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:34:28,757 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:34:28,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-03 05:34:28,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:34:28,972 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr107REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 758 more)] === [2021-11-03 05:34:28,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:34:28,973 INFO L85 PathProgramCache]: Analyzing trace with hash 29098340, now seen corresponding path program 1 times [2021-11-03 05:34:28,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:34:28,973 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1703884512] [2021-11-03 05:34:28,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:34:28,974 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:34:28,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:34:28,974 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:34:28,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-03 05:34:29,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:34:29,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:34:29,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:34:29,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:34:29,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:34:30,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:34:30,001 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:34:30,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1703884512] [2021-11-03 05:34:30,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1703884512] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:34:30,001 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:34:30,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 05:34:30,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634336748] [2021-11-03 05:34:30,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:34:30,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:34:30,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:34:30,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:34:30,002 INFO L87 Difference]: Start difference. First operand 2343 states and 3350 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:34:30,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:34:30,211 INFO L93 Difference]: Finished difference Result 2354 states and 3199 transitions. [2021-11-03 05:34:30,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:34:30,211 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-03 05:34:30,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:34:30,222 INFO L225 Difference]: With dead ends: 2354 [2021-11-03 05:34:30,222 INFO L226 Difference]: Without dead ends: 2354 [2021-11-03 05:34:30,222 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:34:30,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2354 states. [2021-11-03 05:34:30,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2354 to 2159. [2021-11-03 05:34:30,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2159 states, 1556 states have (on average 1.9248071979434447) internal successors, (2995), 2158 states have internal predecessors, (2995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:34:30,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2159 states to 2159 states and 2995 transitions. [2021-11-03 05:34:30,261 INFO L78 Accepts]: Start accepts. Automaton has 2159 states and 2995 transitions. Word has length 50 [2021-11-03 05:34:30,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:34:30,262 INFO L470 AbstractCegarLoop]: Abstraction has 2159 states and 2995 transitions. [2021-11-03 05:34:30,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:34:30,262 INFO L276 IsEmpty]: Start isEmpty. Operand 2159 states and 2995 transitions. [2021-11-03 05:34:30,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-03 05:34:30,263 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:34:30,263 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, 1, 1, 1, 1] [2021-11-03 05:34:30,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-03 05:34:30,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:34:30,476 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 758 more)] === [2021-11-03 05:34:30,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:34:30,476 INFO L85 PathProgramCache]: Analyzing trace with hash -839399161, now seen corresponding path program 1 times [2021-11-03 05:34:30,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:34:30,477 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [647508685] [2021-11-03 05:34:30,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:34:30,478 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:34:30,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:34:30,479 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:34:30,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-03 05:34:30,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:34:30,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:34:30,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:34:30,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 05:34:30,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 05:34:31,597 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-03 05:34:31,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2021-11-03 05:34:31,604 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-03 05:34:31,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 22 [2021-11-03 05:34:31,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:34:31,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:34:36,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:34:36,346 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:34:36,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [647508685] [2021-11-03 05:34:36,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [647508685] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:34:36,347 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:34:36,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-03 05:34:36,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6230952] [2021-11-03 05:34:36,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:34:36,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:34:36,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:34:36,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=16, Unknown=1, NotChecked=0, Total=30 [2021-11-03 05:34:36,348 INFO L87 Difference]: Start difference. First operand 2159 states and 2995 transitions. Second operand has 6 states, 5 states have (on average 20.8) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:34:54,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:34:54,068 INFO L93 Difference]: Finished difference Result 2825 states and 3793 transitions. [2021-11-03 05:34:54,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:34:54,069 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 20.8) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 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 [2021-11-03 05:34:54,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:34:54,078 INFO L225 Difference]: With dead ends: 2825 [2021-11-03 05:34:54,078 INFO L226 Difference]: Without dead ends: 2825 [2021-11-03 05:34:54,079 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=26, Invalid=28, Unknown=2, NotChecked=0, Total=56 [2021-11-03 05:34:54,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2825 states. [2021-11-03 05:34:54,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2825 to 2317. [2021-11-03 05:34:54,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2317 states, 1752 states have (on average 1.8727168949771689) internal successors, (3281), 2316 states have internal predecessors, (3281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:34:54,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2317 states to 2317 states and 3281 transitions. [2021-11-03 05:34:54,122 INFO L78 Accepts]: Start accepts. Automaton has 2317 states and 3281 transitions. Word has length 53 [2021-11-03 05:34:54,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:34:54,122 INFO L470 AbstractCegarLoop]: Abstraction has 2317 states and 3281 transitions. [2021-11-03 05:34:54,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 20.8) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:34:54,123 INFO L276 IsEmpty]: Start isEmpty. Operand 2317 states and 3281 transitions. [2021-11-03 05:34:54,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-03 05:34:54,124 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:34:54,124 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:34:54,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-03 05:34:54,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:34:54,338 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 758 more)] === [2021-11-03 05:34:54,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:34:54,338 INFO L85 PathProgramCache]: Analyzing trace with hash -416260760, now seen corresponding path program 1 times [2021-11-03 05:34:54,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:34:54,339 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [506557954] [2021-11-03 05:34:54,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:34:54,339 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:34:54,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:34:54,340 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:34:54,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-03 05:34:54,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:34:54,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:34:54,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:34:54,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 05:34:54,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-03 05:34:54,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-03 05:34:54,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:34:54,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:34:55,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:34:55,079 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:34:55,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [506557954] [2021-11-03 05:34:55,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [506557954] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:34:55,080 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:34:55,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-03 05:34:55,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605558918] [2021-11-03 05:34:55,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:34:55,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:34:55,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:34:55,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:34:55,081 INFO L87 Difference]: Start difference. First operand 2317 states and 3281 transitions. Second operand has 6 states, 5 states have (on average 11.8) 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) [2021-11-03 05:35:01,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:35:01,299 INFO L93 Difference]: Finished difference Result 3131 states and 4240 transitions. [2021-11-03 05:35:01,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-03 05:35:01,299 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 11.8) 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 59 [2021-11-03 05:35:01,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:35:01,311 INFO L225 Difference]: With dead ends: 3131 [2021-11-03 05:35:01,311 INFO L226 Difference]: Without dead ends: 3131 [2021-11-03 05:35:01,312 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 110 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-11-03 05:35:01,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3131 states. [2021-11-03 05:35:01,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3131 to 2316. [2021-11-03 05:35:01,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2316 states, 1752 states have (on average 1.8715753424657535) internal successors, (3279), 2315 states have internal predecessors, (3279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:35:01,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2316 states to 2316 states and 3279 transitions. [2021-11-03 05:35:01,352 INFO L78 Accepts]: Start accepts. Automaton has 2316 states and 3279 transitions. Word has length 59 [2021-11-03 05:35:01,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:35:01,353 INFO L470 AbstractCegarLoop]: Abstraction has 2316 states and 3279 transitions. [2021-11-03 05:35:01,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 11.8) 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) [2021-11-03 05:35:01,353 INFO L276 IsEmpty]: Start isEmpty. Operand 2316 states and 3279 transitions. [2021-11-03 05:35:01,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-03 05:35:01,354 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:35:01,354 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:35:01,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-03 05:35:01,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:35:01,567 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr67ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 758 more)] === [2021-11-03 05:35:01,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:35:01,568 INFO L85 PathProgramCache]: Analyzing trace with hash -19181353, now seen corresponding path program 1 times [2021-11-03 05:35:01,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:35:01,568 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1565409997] [2021-11-03 05:35:01,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:35:01,568 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:35:01,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:35:01,569 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:35:01,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-03 05:35:01,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:35:01,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-03 05:35:01,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:35:02,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 05:35:02,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-03 05:35:02,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-03 05:35:02,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-11-03 05:35:02,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-11-03 05:35:02,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:35:02,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:35:02,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:35:02,790 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:35:02,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1565409997] [2021-11-03 05:35:02,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1565409997] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:35:02,790 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:35:02,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-03 05:35:02,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700287201] [2021-11-03 05:35:02,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 05:35:02,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:35:02,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 05:35:02,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-03 05:35:02,791 INFO L87 Difference]: Start difference. First operand 2316 states and 3279 transitions. Second operand has 10 states, 9 states have (on average 7.666666666666667) internal successors, (69), 10 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) [2021-11-03 05:35:26,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:35:26,169 INFO L93 Difference]: Finished difference Result 2892 states and 3899 transitions. [2021-11-03 05:35:26,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-03 05:35:26,171 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 7.666666666666667) internal successors, (69), 10 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 60 [2021-11-03 05:35:26,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:35:26,177 INFO L225 Difference]: With dead ends: 2892 [2021-11-03 05:35:26,177 INFO L226 Difference]: Without dead ends: 2892 [2021-11-03 05:35:26,178 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-11-03 05:35:26,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2892 states. [2021-11-03 05:35:26,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2892 to 2315. [2021-11-03 05:35:26,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2315 states, 1752 states have (on average 1.870433789954338) internal successors, (3277), 2314 states have internal predecessors, (3277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:35:26,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2315 states to 2315 states and 3277 transitions. [2021-11-03 05:35:26,215 INFO L78 Accepts]: Start accepts. Automaton has 2315 states and 3277 transitions. Word has length 60 [2021-11-03 05:35:26,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:35:26,215 INFO L470 AbstractCegarLoop]: Abstraction has 2315 states and 3277 transitions. [2021-11-03 05:35:26,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 7.666666666666667) internal successors, (69), 10 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) [2021-11-03 05:35:26,215 INFO L276 IsEmpty]: Start isEmpty. Operand 2315 states and 3277 transitions. [2021-11-03 05:35:26,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-03 05:35:26,216 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:35:26,216 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:35:26,233 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-03 05:35:26,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:35:26,430 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr70REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 758 more)] === [2021-11-03 05:35:26,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:35:26,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1927168386, now seen corresponding path program 1 times [2021-11-03 05:35:26,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:35:26,431 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [992528079] [2021-11-03 05:35:26,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:35:26,431 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:35:26,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:35:26,432 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:35:26,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-03 05:35:26,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:35:26,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:35:26,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:35:27,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:35:27,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:35:27,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:35:27,185 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:35:27,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [992528079] [2021-11-03 05:35:27,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [992528079] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:35:27,185 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:35:27,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 05:35:27,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371389265] [2021-11-03 05:35:27,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:35:27,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:35:27,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:35:27,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:35:27,204 INFO L87 Difference]: Start difference. First operand 2315 states and 3277 transitions. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 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) [2021-11-03 05:35:27,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:35:27,423 INFO L93 Difference]: Finished difference Result 3146 states and 4249 transitions. [2021-11-03 05:35:27,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 05:35:27,424 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 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 64 [2021-11-03 05:35:27,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:35:27,431 INFO L225 Difference]: With dead ends: 3146 [2021-11-03 05:35:27,431 INFO L226 Difference]: Without dead ends: 3146 [2021-11-03 05:35:27,431 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:35:27,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3146 states. [2021-11-03 05:35:27,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3146 to 2333. [2021-11-03 05:35:27,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2333 states, 1770 states have (on average 1.8615819209039548) internal successors, (3295), 2332 states have internal predecessors, (3295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:35:27,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2333 states to 2333 states and 3295 transitions. [2021-11-03 05:35:27,462 INFO L78 Accepts]: Start accepts. Automaton has 2333 states and 3295 transitions. Word has length 64 [2021-11-03 05:35:27,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:35:27,462 INFO L470 AbstractCegarLoop]: Abstraction has 2333 states and 3295 transitions. [2021-11-03 05:35:27,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 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) [2021-11-03 05:35:27,463 INFO L276 IsEmpty]: Start isEmpty. Operand 2333 states and 3295 transitions. [2021-11-03 05:35:27,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-03 05:35:27,463 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:35:27,463 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-03 05:35:27,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-03 05:35:27,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:35:27,664 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr70REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 758 more)] === [2021-11-03 05:35:27,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:35:27,664 INFO L85 PathProgramCache]: Analyzing trace with hash -938951394, now seen corresponding path program 1 times [2021-11-03 05:35:27,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:35:27,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [774898581] [2021-11-03 05:35:27,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:35:27,665 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:35:27,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:35:27,666 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:35:27,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-03 05:35:28,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:35:28,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:35:28,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:35:28,364 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:35:28,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:35:28,567 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:35:28,567 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:35:28,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [774898581] [2021-11-03 05:35:28,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [774898581] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:35:28,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1082410467] [2021-11-03 05:35:28,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:35:28,567 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:35:28,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:35:28,569 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:35:28,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-03 05:35:29,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:35:29,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:35:29,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:35:29,426 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:35:29,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:35:29,539 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:35:29,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1082410467] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:35:29,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715128002] [2021-11-03 05:35:29,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:35:29,540 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:35:29,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:35:29,541 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:35:29,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-03 05:35:30,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:35:30,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:35:30,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:35:30,252 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:35:30,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:35:30,363 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:35:30,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715128002] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:35:30,364 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 05:35:30,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 10 [2021-11-03 05:35:30,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221065814] [2021-11-03 05:35:30,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 05:35:30,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:35:30,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 05:35:30,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-03 05:35:30,366 INFO L87 Difference]: Start difference. First operand 2333 states and 3295 transitions. Second operand has 10 states, 10 states have (on average 7.2) internal successors, (72), 10 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) [2021-11-03 05:35:30,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:35:30,944 INFO L93 Difference]: Finished difference Result 3182 states and 4285 transitions. [2021-11-03 05:35:30,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 05:35:30,945 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.2) internal successors, (72), 10 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 66 [2021-11-03 05:35:30,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:35:30,978 INFO L225 Difference]: With dead ends: 3182 [2021-11-03 05:35:30,978 INFO L226 Difference]: Without dead ends: 3182 [2021-11-03 05:35:30,981 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 382 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2021-11-03 05:35:30,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3182 states. [2021-11-03 05:35:31,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3182 to 2369. [2021-11-03 05:35:31,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2369 states, 1806 states have (on average 1.8444075304540422) internal successors, (3331), 2368 states have internal predecessors, (3331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:35:31,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2369 states to 2369 states and 3331 transitions. [2021-11-03 05:35:31,014 INFO L78 Accepts]: Start accepts. Automaton has 2369 states and 3331 transitions. Word has length 66 [2021-11-03 05:35:31,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:35:31,015 INFO L470 AbstractCegarLoop]: Abstraction has 2369 states and 3331 transitions. [2021-11-03 05:35:31,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.2) internal successors, (72), 10 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) [2021-11-03 05:35:31,015 INFO L276 IsEmpty]: Start isEmpty. Operand 2369 states and 3331 transitions. [2021-11-03 05:35:31,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-03 05:35:31,016 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:35:31,016 INFO L513 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:35:31,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-03 05:35:31,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-03 05:35:31,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-03 05:35:31,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:35:31,634 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr70REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 758 more)] === [2021-11-03 05:35:31,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:35:31,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1093747294, now seen corresponding path program 2 times [2021-11-03 05:35:31,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:35:31,635 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1529617176] [2021-11-03 05:35:31,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 05:35:31,636 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:35:31,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:35:31,636 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:35:31,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-03 05:35:32,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 05:35:32,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 05:35:32,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-03 05:35:32,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:35:32,740 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:35:32,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:35:33,167 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:35:33,167 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:35:33,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1529617176] [2021-11-03 05:35:33,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1529617176] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:35:33,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1506848429] [2021-11-03 05:35:33,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 05:35:33,168 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:35:33,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:35:33,169 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:35:33,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-03 05:35:34,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 05:35:34,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 05:35:34,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-03 05:35:34,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:35:34,905 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:35:34,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:35:35,059 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:35:35,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1506848429] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:35:35,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842597008] [2021-11-03 05:35:35,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 05:35:35,060 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:35:35,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:35:35,064 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:35:35,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-03 05:35:49,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 05:35:49,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 05:35:49,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-03 05:35:49,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:35:49,545 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:35:49,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:35:49,712 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:35:49,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842597008] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:35:49,713 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 05:35:49,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10, 10] total 18 [2021-11-03 05:35:49,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336703491] [2021-11-03 05:35:49,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-03 05:35:49,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:35:49,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-03 05:35:49,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2021-11-03 05:35:49,717 INFO L87 Difference]: Start difference. First operand 2369 states and 3331 transitions. Second operand has 18 states, 18 states have (on average 4.444444444444445) internal successors, (80), 18 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:35:53,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:35:53,083 INFO L93 Difference]: Finished difference Result 3254 states and 4357 transitions. [2021-11-03 05:35:53,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-03 05:35:53,084 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.444444444444445) internal successors, (80), 18 states have internal predecessors, (80), 0 states have call successors, (0), 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 [2021-11-03 05:35:53,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:35:53,090 INFO L225 Difference]: With dead ends: 3254 [2021-11-03 05:35:53,090 INFO L226 Difference]: Without dead ends: 3254 [2021-11-03 05:35:53,091 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 398 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=370, Invalid=622, Unknown=0, NotChecked=0, Total=992 [2021-11-03 05:35:53,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3254 states. [2021-11-03 05:35:53,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3254 to 2441. [2021-11-03 05:35:53,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2441 states, 1878 states have (on average 1.8120340788072418) internal successors, (3403), 2440 states have internal predecessors, (3403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:35:53,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2441 states to 2441 states and 3403 transitions. [2021-11-03 05:35:53,140 INFO L78 Accepts]: Start accepts. Automaton has 2441 states and 3403 transitions. Word has length 70 [2021-11-03 05:35:53,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:35:53,140 INFO L470 AbstractCegarLoop]: Abstraction has 2441 states and 3403 transitions. [2021-11-03 05:35:53,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.444444444444445) internal successors, (80), 18 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:35:53,141 INFO L276 IsEmpty]: Start isEmpty. Operand 2441 states and 3403 transitions. [2021-11-03 05:35:53,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-03 05:35:53,141 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:35:53,142 INFO L513 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:35:53,194 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-03 05:35:53,353 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-11-03 05:35:53,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-03 05:35:53,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:35:53,748 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr70REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 758 more)] === [2021-11-03 05:35:53,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:35:53,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1408996130, now seen corresponding path program 3 times [2021-11-03 05:35:53,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:35:53,749 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [397334092] [2021-11-03 05:35:53,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 05:35:53,749 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:35:53,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:35:53,750 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:35:53,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-03 05:35:54,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-03 05:35:54,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 05:35:54,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-03 05:35:54,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:35:55,432 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:35:55,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:35:56,774 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:35:56,774 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:35:56,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [397334092] [2021-11-03 05:35:56,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [397334092] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:35:56,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1192995624] [2021-11-03 05:35:56,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 05:35:56,775 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:35:56,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:35:56,776 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:35:56,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-03 05:36:02,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-03 05:36:02,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 05:36:02,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-03 05:36:02,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:36:02,994 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:36:02,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:36:03,192 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:36:03,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1192995624] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:36:03,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761125897] [2021-11-03 05:36:03,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 05:36:03,193 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:36:03,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:36:03,194 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:36:03,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b41f42e3-b463-4721-9cd3-03d09e1c5700/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process