./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P --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 22840dbbc7fdeff8c5ae44a2e4ee4ab6a60b4cab9f47ba8847305b912adb9a2c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 22:49:26,529 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 22:49:26,531 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 22:49:26,560 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 22:49:26,561 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 22:49:26,562 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 22:49:26,564 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 22:49:26,566 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 22:49:26,568 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 22:49:26,569 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 22:49:26,570 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 22:49:26,572 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 22:49:26,572 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 22:49:26,574 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 22:49:26,575 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 22:49:26,577 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 22:49:26,578 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 22:49:26,578 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 22:49:26,581 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 22:49:26,583 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 22:49:26,585 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 22:49:26,587 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 22:49:26,588 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 22:49:26,589 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 22:49:26,593 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 22:49:26,593 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 22:49:26,593 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 22:49:26,595 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 22:49:26,595 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 22:49:26,596 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 22:49:26,597 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 22:49:26,598 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 22:49:26,598 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 22:49:26,599 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 22:49:26,601 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 22:49:26,601 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 22:49:26,602 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 22:49:26,602 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 22:49:26,603 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 22:49:26,604 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 22:49:26,605 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 22:49:26,607 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-20 22:49:26,643 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 22:49:26,644 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 22:49:26,649 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 22:49:26,650 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 22:49:26,650 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 22:49:26,651 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 22:49:26,651 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 22:49:26,651 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 22:49:26,651 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 22:49:26,652 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-20 22:49:26,653 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 22:49:26,653 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 22:49:26,653 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-20 22:49:26,653 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-20 22:49:26,654 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 22:49:26,654 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-20 22:49:26,654 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-20 22:49:26,654 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-20 22:49:26,655 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 22:49:26,655 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 22:49:26,656 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 22:49:26,656 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 22:49:26,656 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-20 22:49:26,658 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 22:49:26,658 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 22:49:26,658 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 22:49:26,658 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-20 22:49:26,658 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-20 22:49:26,659 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-20 22:49:26,659 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 22:49:26,659 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-20 22:49:26,659 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 22:49:26,660 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 22:49:26,660 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 22:49:26,660 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 22:49:26,660 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 22:49:26,661 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 22:49:26,661 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 22:49:26,661 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-20 22:49:26,661 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 22:49:26,662 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 22:49:26,662 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 22:49:26,662 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_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 22840dbbc7fdeff8c5ae44a2e4ee4ab6a60b4cab9f47ba8847305b912adb9a2c [2021-11-20 22:49:26,945 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 22:49:26,964 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 22:49:26,967 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 22:49:26,968 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 22:49:26,969 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 22:49:26,970 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-2.i [2021-11-20 22:49:27,044 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/data/89a276308/578e4cc425b342afb9e9e1ce8e6a1ccc/FLAGbc16df184 [2021-11-20 22:49:27,765 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 22:49:27,767 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-2.i [2021-11-20 22:49:27,788 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/data/89a276308/578e4cc425b342afb9e9e1ce8e6a1ccc/FLAGbc16df184 [2021-11-20 22:49:27,914 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/data/89a276308/578e4cc425b342afb9e9e1ce8e6a1ccc [2021-11-20 22:49:27,917 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 22:49:27,919 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 22:49:27,936 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 22:49:27,936 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 22:49:27,939 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 22:49:27,939 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:49:27" (1/1) ... [2021-11-20 22:49:27,940 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d66de0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:49:27, skipping insertion in model container [2021-11-20 22:49:27,940 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:49:27" (1/1) ... [2021-11-20 22:49:27,946 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 22:49:28,041 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 22:49:28,489 WARN L230 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_9c1aa655-f216-44ad-a818-a0d79d1f1d63/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-2.i[33022,33035] [2021-11-20 22:49:28,788 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 22:49:28,797 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) [2021-11-20 22:49:28,798 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1dc1b6e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:49:28, skipping insertion in model container [2021-11-20 22:49:28,798 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 22:49:28,799 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-20 22:49:28,801 INFO L158 Benchmark]: Toolchain (without parser) took 881.13ms. Allocated memory is still 100.7MB. Free memory was 58.9MB in the beginning and 55.7MB in the end (delta: 3.2MB). Peak memory consumption was 6.7MB. Max. memory is 16.1GB. [2021-11-20 22:49:28,801 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 100.7MB. Free memory is still 78.5MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 22:49:28,802 INFO L158 Benchmark]: CACSL2BoogieTranslator took 862.86ms. Allocated memory is still 100.7MB. Free memory was 58.7MB in the beginning and 55.7MB in the end (delta: 3.0MB). Peak memory consumption was 6.7MB. Max. memory is 16.1GB. [2021-11-20 22:49:28,804 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 100.7MB. Free memory is still 78.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 862.86ms. Allocated memory is still 100.7MB. Free memory was 58.7MB in the beginning and 55.7MB in the end (delta: 3.0MB). Peak memory consumption was 6.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 734]: 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_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P --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 22840dbbc7fdeff8c5ae44a2e4ee4ab6a60b4cab9f47ba8847305b912adb9a2c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 22:49:30,911 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 22:49:30,913 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 22:49:30,958 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 22:49:30,959 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 22:49:30,963 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 22:49:30,965 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 22:49:30,969 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 22:49:30,972 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 22:49:30,979 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 22:49:30,981 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 22:49:30,983 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 22:49:30,983 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 22:49:30,986 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 22:49:30,988 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 22:49:30,992 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 22:49:30,993 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 22:49:30,994 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 22:49:30,996 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 22:49:31,003 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 22:49:31,005 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 22:49:31,007 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 22:49:31,009 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 22:49:31,011 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 22:49:31,020 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 22:49:31,020 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 22:49:31,021 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 22:49:31,022 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 22:49:31,023 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 22:49:31,024 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 22:49:31,025 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 22:49:31,026 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 22:49:31,028 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 22:49:31,028 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 22:49:31,030 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 22:49:31,030 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 22:49:31,031 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 22:49:31,031 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 22:49:31,031 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 22:49:31,033 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 22:49:31,034 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 22:49:31,034 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-20 22:49:31,083 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 22:49:31,083 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 22:49:31,084 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 22:49:31,084 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 22:49:31,085 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 22:49:31,085 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 22:49:31,085 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 22:49:31,085 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 22:49:31,085 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 22:49:31,086 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 22:49:31,087 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 22:49:31,087 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 22:49:31,088 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 22:49:31,088 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 22:49:31,088 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 22:49:31,089 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 22:49:31,089 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-20 22:49:31,089 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 22:49:31,089 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 22:49:31,089 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 22:49:31,090 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-20 22:49:31,090 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-20 22:49:31,090 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-20 22:49:31,090 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 22:49:31,090 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-20 22:49:31,090 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-20 22:49:31,091 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-20 22:49:31,091 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 22:49:31,091 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 22:49:31,091 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 22:49:31,092 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 22:49:31,092 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 22:49:31,092 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 22:49:31,092 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 22:49:31,093 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 22:49:31,093 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-20 22:49:31,093 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-20 22:49:31,093 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 22:49:31,094 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 22:49:31,094 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_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 22840dbbc7fdeff8c5ae44a2e4ee4ab6a60b4cab9f47ba8847305b912adb9a2c [2021-11-20 22:49:31,496 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 22:49:31,516 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 22:49:31,519 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 22:49:31,520 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 22:49:31,521 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 22:49:31,522 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-2.i [2021-11-20 22:49:31,586 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/data/3dc81c429/ce77532a9ffb40d7a708c4d916b27c9b/FLAGda32300bc [2021-11-20 22:49:32,324 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 22:49:32,325 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-2.i [2021-11-20 22:49:32,350 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/data/3dc81c429/ce77532a9ffb40d7a708c4d916b27c9b/FLAGda32300bc [2021-11-20 22:49:32,487 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/data/3dc81c429/ce77532a9ffb40d7a708c4d916b27c9b [2021-11-20 22:49:32,489 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 22:49:32,490 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 22:49:32,504 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 22:49:32,504 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 22:49:32,508 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 22:49:32,509 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:49:32" (1/1) ... [2021-11-20 22:49:32,510 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11248c23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:49:32, skipping insertion in model container [2021-11-20 22:49:32,510 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:49:32" (1/1) ... [2021-11-20 22:49:32,520 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 22:49:32,644 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 22:49:33,143 WARN L230 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_9c1aa655-f216-44ad-a818-a0d79d1f1d63/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-2.i[33022,33035] [2021-11-20 22:49:33,392 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 22:49:33,404 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-20 22:49:33,428 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 22:49:33,460 WARN L230 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_9c1aa655-f216-44ad-a818-a0d79d1f1d63/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-2.i[33022,33035] [2021-11-20 22:49:33,626 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 22:49:33,631 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 22:49:33,670 WARN L230 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_9c1aa655-f216-44ad-a818-a0d79d1f1d63/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-2.i[33022,33035] [2021-11-20 22:49:33,831 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 22:49:33,884 INFO L208 MainTranslator]: Completed translation [2021-11-20 22:49:33,884 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:49:33 WrapperNode [2021-11-20 22:49:33,884 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 22:49:33,886 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 22:49:33,886 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 22:49:33,886 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 22:49:33,893 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:49:33" (1/1) ... [2021-11-20 22:49:33,976 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:49:33" (1/1) ... [2021-11-20 22:49:34,078 INFO L137 Inliner]: procedures = 180, calls = 575, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 2348 [2021-11-20 22:49:34,078 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 22:49:34,079 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 22:49:34,079 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 22:49:34,079 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 22:49:34,089 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:49:33" (1/1) ... [2021-11-20 22:49:34,089 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:49:33" (1/1) ... [2021-11-20 22:49:34,113 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:49:33" (1/1) ... [2021-11-20 22:49:34,117 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:49:33" (1/1) ... [2021-11-20 22:49:34,261 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:49:33" (1/1) ... [2021-11-20 22:49:34,300 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:49:33" (1/1) ... [2021-11-20 22:49:34,312 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:49:33" (1/1) ... [2021-11-20 22:49:34,337 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 22:49:34,339 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 22:49:34,339 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 22:49:34,339 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 22:49:34,340 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:49:33" (1/1) ... [2021-11-20 22:49:34,347 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 22:49:34,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:49:34,373 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 22:49:34,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 22:49:34,422 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-20 22:49:34,423 INFO L130 BoogieDeclarations]: Found specification of procedure test_int_int [2021-11-20 22:49:34,423 INFO L138 BoogieDeclarations]: Found implementation of procedure test_int_int [2021-11-20 22:49:34,423 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-20 22:49:34,423 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-20 22:49:34,423 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-20 22:49:34,423 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-20 22:49:34,424 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-20 22:49:34,424 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 22:49:34,424 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 22:49:34,424 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 22:49:34,424 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 22:49:34,424 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-20 22:49:34,424 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 22:49:34,425 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 22:49:34,425 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-20 22:49:34,425 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-20 22:49:34,425 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 22:49:34,425 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 22:49:34,807 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 22:49:34,809 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 22:49:34,813 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-20 22:49:44,067 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 22:49:44,090 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 22:49:44,094 INFO L301 CfgBuilder]: Removed 160 assume(true) statements. [2021-11-20 22:49:44,099 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:49:44 BoogieIcfgContainer [2021-11-20 22:49:44,102 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 22:49:44,105 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 22:49:44,105 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 22:49:44,108 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 22:49:44,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 10:49:32" (1/3) ... [2021-11-20 22:49:44,110 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32c79eb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:49:44, skipping insertion in model container [2021-11-20 22:49:44,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:49:33" (2/3) ... [2021-11-20 22:49:44,110 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32c79eb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:49:44, skipping insertion in model container [2021-11-20 22:49:44,111 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:49:44" (3/3) ... [2021-11-20 22:49:44,112 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_SAX_test10-2.i [2021-11-20 22:49:44,118 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 22:49:44,119 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1095 error locations. [2021-11-20 22:49:44,175 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 22:49:44,186 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 [2021-11-20 22:49:44,186 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1095 error locations. [2021-11-20 22:49:44,249 INFO L276 IsEmpty]: Start isEmpty. Operand has 2259 states, 1152 states have (on average 2.2144097222222223) internal successors, (2551), 2245 states have internal predecessors, (2551), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-20 22:49:44,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-20 22:49:44,255 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:49:44,256 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-20 22:49:44,256 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1091 more)] === [2021-11-20 22:49:44,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:49:44,261 INFO L85 PathProgramCache]: Analyzing trace with hash 66598, now seen corresponding path program 1 times [2021-11-20 22:49:44,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:49:44,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1646965933] [2021-11-20 22:49:44,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:49:44,302 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:49:44,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:49:44,305 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:49:44,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-20 22:49:44,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:49:44,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 22:49:44,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:49:44,658 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 [2021-11-20 22:49:44,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:49:44,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:49:44,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:49:44,710 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:49:44,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1646965933] [2021-11-20 22:49:44,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1646965933] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:49:44,711 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:49:44,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-20 22:49:44,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083896180] [2021-11-20 22:49:44,714 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:49:44,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 22:49:44,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:49:44,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 22:49:44,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 22:49:44,759 INFO L87 Difference]: Start difference. First operand has 2259 states, 1152 states have (on average 2.2144097222222223) internal successors, (2551), 2245 states have internal predecessors, (2551), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:49:49,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:49:49,561 INFO L93 Difference]: Finished difference Result 2934 states and 3120 transitions. [2021-11-20 22:49:49,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 22:49:49,563 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 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 3 [2021-11-20 22:49:49,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:49:49,601 INFO L225 Difference]: With dead ends: 2934 [2021-11-20 22:49:49,602 INFO L226 Difference]: Without dead ends: 2932 [2021-11-20 22:49:49,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 22:49:49,607 INFO L933 BasicCegarLoop]: 1394 mSDtfsCounter, 2142 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 1472 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2152 SdHoareTripleChecker+Valid, 1869 SdHoareTripleChecker+Invalid, 1495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2021-11-20 22:49:49,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2152 Valid, 1869 Invalid, 1495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1472 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2021-11-20 22:49:49,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2932 states. [2021-11-20 22:49:49,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2932 to 2401. [2021-11-20 22:49:49,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2401 states, 1318 states have (on average 2.0515933232169954) internal successors, (2704), 2385 states have internal predecessors, (2704), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-20 22:49:49,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2401 states to 2401 states and 2736 transitions. [2021-11-20 22:49:49,764 INFO L78 Accepts]: Start accepts. Automaton has 2401 states and 2736 transitions. Word has length 3 [2021-11-20 22:49:49,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:49:49,765 INFO L470 AbstractCegarLoop]: Abstraction has 2401 states and 2736 transitions. [2021-11-20 22:49:49,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:49:49,765 INFO L276 IsEmpty]: Start isEmpty. Operand 2401 states and 2736 transitions. [2021-11-20 22:49:49,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-20 22:49:49,766 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:49:49,766 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-20 22:49:49,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-20 22:49:49,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:49:49,981 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1091 more)] === [2021-11-20 22:49:49,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:49:49,982 INFO L85 PathProgramCache]: Analyzing trace with hash 66599, now seen corresponding path program 1 times [2021-11-20 22:49:49,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:49:49,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [450429388] [2021-11-20 22:49:49,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:49:49,983 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:49:49,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:49:49,985 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:49:50,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-20 22:49:50,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:49:50,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 22:49:50,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:49:50,177 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 [2021-11-20 22:49:50,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:49:50,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:49:50,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:49:50,242 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:49:50,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [450429388] [2021-11-20 22:49:50,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [450429388] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:49:50,243 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:49:50,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-20 22:49:50,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351415276] [2021-11-20 22:49:50,243 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:49:50,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:49:50,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:49:50,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:49:50,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:49:50,245 INFO L87 Difference]: Start difference. First operand 2401 states and 2736 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 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) [2021-11-20 22:50:00,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:50:00,480 INFO L93 Difference]: Finished difference Result 3701 states and 4147 transitions. [2021-11-20 22:50:00,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:50:00,482 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 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 3 [2021-11-20 22:50:00,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:50:00,503 INFO L225 Difference]: With dead ends: 3701 [2021-11-20 22:50:00,503 INFO L226 Difference]: Without dead ends: 3701 [2021-11-20 22:50:00,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:50:00,505 INFO L933 BasicCegarLoop]: 1682 mSDtfsCounter, 2670 mSDsluCounter, 1838 mSDsCounter, 0 mSdLazyCounter, 2313 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2678 SdHoareTripleChecker+Valid, 3520 SdHoareTripleChecker+Invalid, 2336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 2313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.1s IncrementalHoareTripleChecker+Time [2021-11-20 22:50:00,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2678 Valid, 3520 Invalid, 2336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 2313 Invalid, 0 Unknown, 0 Unchecked, 10.1s Time] [2021-11-20 22:50:00,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3701 states. [2021-11-20 22:50:00,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3701 to 2565. [2021-11-20 22:50:00,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2565 states, 1494 states have (on average 2.038821954484605) internal successors, (3046), 2549 states have internal predecessors, (3046), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-20 22:50:00,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2565 states to 2565 states and 3078 transitions. [2021-11-20 22:50:00,585 INFO L78 Accepts]: Start accepts. Automaton has 2565 states and 3078 transitions. Word has length 3 [2021-11-20 22:50:00,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:50:00,585 INFO L470 AbstractCegarLoop]: Abstraction has 2565 states and 3078 transitions. [2021-11-20 22:50:00,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 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) [2021-11-20 22:50:00,586 INFO L276 IsEmpty]: Start isEmpty. Operand 2565 states and 3078 transitions. [2021-11-20 22:50:00,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-20 22:50:00,586 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:50:00,587 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:50:00,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-20 22:50:00,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:50:00,792 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1091 more)] === [2021-11-20 22:50:00,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:50:00,793 INFO L85 PathProgramCache]: Analyzing trace with hash -305791726, now seen corresponding path program 1 times [2021-11-20 22:50:00,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:50:00,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [332365636] [2021-11-20 22:50:00,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:50:00,794 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:50:00,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:50:00,808 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:50:00,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-20 22:50:01,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:50:01,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 22:50:01,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:50:01,040 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 [2021-11-20 22:50:01,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:50:01,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:50:01,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:50:01,095 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:50:01,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [332365636] [2021-11-20 22:50:01,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [332365636] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:50:01,096 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:50:01,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-20 22:50:01,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468518052] [2021-11-20 22:50:01,097 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:50:01,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 22:50:01,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:50:01,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 22:50:01,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 22:50:01,099 INFO L87 Difference]: Start difference. First operand 2565 states and 3078 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 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) [2021-11-20 22:50:04,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:50:04,893 INFO L93 Difference]: Finished difference Result 3303 states and 3816 transitions. [2021-11-20 22:50:04,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 22:50:04,893 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 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 8 [2021-11-20 22:50:04,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:50:04,916 INFO L225 Difference]: With dead ends: 3303 [2021-11-20 22:50:04,916 INFO L226 Difference]: Without dead ends: 3303 [2021-11-20 22:50:04,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 22:50:04,921 INFO L933 BasicCegarLoop]: 2161 mSDtfsCounter, 1987 mSDsluCounter, 748 mSDsCounter, 0 mSdLazyCounter, 1481 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1997 SdHoareTripleChecker+Valid, 2909 SdHoareTripleChecker+Invalid, 1583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-11-20 22:50:04,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1997 Valid, 2909 Invalid, 1583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1481 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2021-11-20 22:50:04,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3303 states. [2021-11-20 22:50:04,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3303 to 2474. [2021-11-20 22:50:04,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2474 states, 1494 states have (on average 1.9551539491298529) internal successors, (2921), 2458 states have internal predecessors, (2921), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-20 22:50:04,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2474 states to 2474 states and 2953 transitions. [2021-11-20 22:50:04,999 INFO L78 Accepts]: Start accepts. Automaton has 2474 states and 2953 transitions. Word has length 8 [2021-11-20 22:50:04,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:50:04,999 INFO L470 AbstractCegarLoop]: Abstraction has 2474 states and 2953 transitions. [2021-11-20 22:50:05,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 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) [2021-11-20 22:50:05,000 INFO L276 IsEmpty]: Start isEmpty. Operand 2474 states and 2953 transitions. [2021-11-20 22:50:05,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-20 22:50:05,001 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:50:05,001 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:50:05,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-20 22:50:05,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:50:05,213 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1091 more)] === [2021-11-20 22:50:05,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:50:05,213 INFO L85 PathProgramCache]: Analyzing trace with hash -305791725, now seen corresponding path program 1 times [2021-11-20 22:50:05,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:50:05,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [462356407] [2021-11-20 22:50:05,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:50:05,214 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:50:05,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:50:05,216 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:50:05,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-20 22:50:05,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:50:05,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 22:50:05,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:50:05,468 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 [2021-11-20 22:50:05,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:50:05,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:50:05,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:50:05,604 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:50:05,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [462356407] [2021-11-20 22:50:05,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [462356407] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:50:05,605 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:50:05,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-20 22:50:05,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872855126] [2021-11-20 22:50:05,605 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:50:05,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:50:05,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:50:05,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:50:05,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:50:05,606 INFO L87 Difference]: Start difference. First operand 2474 states and 2953 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:50:15,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:50:15,904 INFO L93 Difference]: Finished difference Result 3429 states and 3844 transitions. [2021-11-20 22:50:15,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:50:15,905 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 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 8 [2021-11-20 22:50:15,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:50:15,923 INFO L225 Difference]: With dead ends: 3429 [2021-11-20 22:50:15,923 INFO L226 Difference]: Without dead ends: 3429 [2021-11-20 22:50:15,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:50:15,924 INFO L933 BasicCegarLoop]: 2491 mSDtfsCounter, 1441 mSDsluCounter, 2164 mSDsCounter, 0 mSdLazyCounter, 2592 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1447 SdHoareTripleChecker+Valid, 4655 SdHoareTripleChecker+Invalid, 2619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 2592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.2s IncrementalHoareTripleChecker+Time [2021-11-20 22:50:15,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1447 Valid, 4655 Invalid, 2619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 2592 Invalid, 0 Unknown, 0 Unchecked, 10.2s Time] [2021-11-20 22:50:15,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3429 states. [2021-11-20 22:50:15,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3429 to 2466. [2021-11-20 22:50:15,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2466 states, 1496 states have (on average 1.9391711229946524) internal successors, (2901), 2450 states have internal predecessors, (2901), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-20 22:50:15,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2466 states to 2466 states and 2933 transitions. [2021-11-20 22:50:15,993 INFO L78 Accepts]: Start accepts. Automaton has 2466 states and 2933 transitions. Word has length 8 [2021-11-20 22:50:15,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:50:15,993 INFO L470 AbstractCegarLoop]: Abstraction has 2466 states and 2933 transitions. [2021-11-20 22:50:15,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:50:15,994 INFO L276 IsEmpty]: Start isEmpty. Operand 2466 states and 2933 transitions. [2021-11-20 22:50:15,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-20 22:50:15,994 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:50:15,995 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:50:16,011 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-20 22:50:16,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:50:16,206 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr658REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1091 more)] === [2021-11-20 22:50:16,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:50:16,207 INFO L85 PathProgramCache]: Analyzing trace with hash -690352907, now seen corresponding path program 1 times [2021-11-20 22:50:16,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:50:16,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [148519171] [2021-11-20 22:50:16,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:50:16,208 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:50:16,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:50:16,209 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:50:16,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-20 22:50:16,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:50:16,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 22:50:16,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:50:16,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:50:16,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:50:16,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:50:16,469 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:50:16,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [148519171] [2021-11-20 22:50:16,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [148519171] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:50:16,470 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:50:16,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-20 22:50:16,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795149286] [2021-11-20 22:50:16,470 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:50:16,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:50:16,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:50:16,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:50:16,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:50:16,472 INFO L87 Difference]: Start difference. First operand 2466 states and 2933 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) [2021-11-20 22:50:16,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:50:16,521 INFO L93 Difference]: Finished difference Result 2424 states and 2890 transitions. [2021-11-20 22:50:16,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 22:50:16,521 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 [2021-11-20 22:50:16,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:50:16,535 INFO L225 Difference]: With dead ends: 2424 [2021-11-20 22:50:16,536 INFO L226 Difference]: Without dead ends: 2424 [2021-11-20 22:50:16,536 INFO L932 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 [2021-11-20 22:50:16,538 INFO L933 BasicCegarLoop]: 2210 mSDtfsCounter, 1006 mSDsluCounter, 2420 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1010 SdHoareTripleChecker+Valid, 4630 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 22:50:16,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1010 Valid, 4630 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 22:50:16,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2424 states. [2021-11-20 22:50:16,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2424 to 2424. [2021-11-20 22:50:16,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2424 states, 1478 states have (on average 1.9336941813261164) internal successors, (2858), 2408 states have internal predecessors, (2858), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-20 22:50:16,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2424 states to 2424 states and 2890 transitions. [2021-11-20 22:50:16,596 INFO L78 Accepts]: Start accepts. Automaton has 2424 states and 2890 transitions. Word has length 11 [2021-11-20 22:50:16,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:50:16,596 INFO L470 AbstractCegarLoop]: Abstraction has 2424 states and 2890 transitions. [2021-11-20 22:50:16,597 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) [2021-11-20 22:50:16,597 INFO L276 IsEmpty]: Start isEmpty. Operand 2424 states and 2890 transitions. [2021-11-20 22:50:16,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-20 22:50:16,598 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:50:16,599 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:50:16,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-20 22:50:16,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:50:16,811 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr682REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1091 more)] === [2021-11-20 22:50:16,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:50:16,812 INFO L85 PathProgramCache]: Analyzing trace with hash -2004126129, now seen corresponding path program 1 times [2021-11-20 22:50:16,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:50:16,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [354397727] [2021-11-20 22:50:16,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:50:16,813 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:50:16,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:50:16,814 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:50:16,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-20 22:50:17,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:50:17,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 22:50:17,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:50:17,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:50:17,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:50:17,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:50:17,086 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:50:17,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [354397727] [2021-11-20 22:50:17,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [354397727] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:50:17,086 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:50:17,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-20 22:50:17,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240611908] [2021-11-20 22:50:17,087 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:50:17,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 22:50:17,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:50:17,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 22:50:17,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:50:17,090 INFO L87 Difference]: Start difference. First operand 2424 states and 2890 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) [2021-11-20 22:50:17,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:50:17,191 INFO L93 Difference]: Finished difference Result 2403 states and 2862 transitions. [2021-11-20 22:50:17,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:50:17,192 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 [2021-11-20 22:50:17,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:50:17,205 INFO L225 Difference]: With dead ends: 2403 [2021-11-20 22:50:17,205 INFO L226 Difference]: Without dead ends: 2403 [2021-11-20 22:50:17,205 INFO L932 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 [2021-11-20 22:50:17,206 INFO L933 BasicCegarLoop]: 2165 mSDtfsCounter, 977 mSDsluCounter, 4578 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 981 SdHoareTripleChecker+Valid, 6743 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 22:50:17,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [981 Valid, 6743 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 22:50:17,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2403 states. [2021-11-20 22:50:17,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2403 to 2402. [2021-11-20 22:50:17,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2402 states, 1470 states have (on average 1.9244897959183673) internal successors, (2829), 2386 states have internal predecessors, (2829), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-20 22:50:17,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2402 states to 2402 states and 2861 transitions. [2021-11-20 22:50:17,256 INFO L78 Accepts]: Start accepts. Automaton has 2402 states and 2861 transitions. Word has length 13 [2021-11-20 22:50:17,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:50:17,256 INFO L470 AbstractCegarLoop]: Abstraction has 2402 states and 2861 transitions. [2021-11-20 22:50:17,257 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) [2021-11-20 22:50:17,257 INFO L276 IsEmpty]: Start isEmpty. Operand 2402 states and 2861 transitions. [2021-11-20 22:50:17,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-20 22:50:17,258 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:50:17,258 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:50:17,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-20 22:50:17,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:50:17,469 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1091 more)] === [2021-11-20 22:50:17,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:50:17,470 INFO L85 PathProgramCache]: Analyzing trace with hash 445820063, now seen corresponding path program 1 times [2021-11-20 22:50:17,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:50:17,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [205237306] [2021-11-20 22:50:17,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:50:17,471 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:50:17,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:50:17,472 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:50:17,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-20 22:50:17,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:50:17,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 22:50:17,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:50:17,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:50:17,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:50:17,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:50:17,764 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:50:17,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [205237306] [2021-11-20 22:50:17,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [205237306] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:50:17,765 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:50:17,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-20 22:50:17,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860743847] [2021-11-20 22:50:17,765 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:50:17,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:50:17,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:50:17,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:50:17,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:50:17,766 INFO L87 Difference]: Start difference. First operand 2402 states and 2861 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:50:17,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:50:17,843 INFO L93 Difference]: Finished difference Result 3878 states and 4485 transitions. [2021-11-20 22:50:17,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 22:50:17,844 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 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 20 [2021-11-20 22:50:17,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:50:17,864 INFO L225 Difference]: With dead ends: 3878 [2021-11-20 22:50:17,864 INFO L226 Difference]: Without dead ends: 3878 [2021-11-20 22:50:17,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:50:17,866 INFO L933 BasicCegarLoop]: 3487 mSDtfsCounter, 4182 mSDsluCounter, 1618 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4192 SdHoareTripleChecker+Valid, 5105 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 22:50:17,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4192 Valid, 5105 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 22:50:17,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3878 states. [2021-11-20 22:50:17,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3878 to 2360. [2021-11-20 22:50:17,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2360 states, 1452 states have (on average 1.918732782369146) internal successors, (2786), 2344 states have internal predecessors, (2786), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-20 22:50:17,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2360 states to 2360 states and 2818 transitions. [2021-11-20 22:50:17,923 INFO L78 Accepts]: Start accepts. Automaton has 2360 states and 2818 transitions. Word has length 20 [2021-11-20 22:50:17,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:50:17,924 INFO L470 AbstractCegarLoop]: Abstraction has 2360 states and 2818 transitions. [2021-11-20 22:50:17,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:50:17,924 INFO L276 IsEmpty]: Start isEmpty. Operand 2360 states and 2818 transitions. [2021-11-20 22:50:17,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-20 22:50:17,925 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:50:17,926 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:50:17,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-20 22:50:18,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:50:18,137 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr334REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1091 more)] === [2021-11-20 22:50:18,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:50:18,138 INFO L85 PathProgramCache]: Analyzing trace with hash 591123743, now seen corresponding path program 1 times [2021-11-20 22:50:18,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:50:18,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1425522397] [2021-11-20 22:50:18,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:50:18,139 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:50:18,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:50:18,140 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:50:18,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-20 22:50:18,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:50:18,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 22:50:18,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:50:18,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:50:18,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:50:18,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:50:18,417 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:50:18,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1425522397] [2021-11-20 22:50:18,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1425522397] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:50:18,417 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:50:18,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-20 22:50:18,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173830988] [2021-11-20 22:50:18,417 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:50:18,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:50:18,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:50:18,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:50:18,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:50:18,418 INFO L87 Difference]: Start difference. First operand 2360 states and 2818 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:50:18,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:50:18,487 INFO L93 Difference]: Finished difference Result 3751 states and 4304 transitions. [2021-11-20 22:50:18,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 22:50:18,488 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 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 20 [2021-11-20 22:50:18,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:50:18,505 INFO L225 Difference]: With dead ends: 3751 [2021-11-20 22:50:18,506 INFO L226 Difference]: Without dead ends: 3751 [2021-11-20 22:50:18,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:50:18,507 INFO L933 BasicCegarLoop]: 3395 mSDtfsCounter, 2048 mSDsluCounter, 3136 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2058 SdHoareTripleChecker+Valid, 6531 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 22:50:18,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2058 Valid, 6531 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 22:50:18,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3751 states. [2021-11-20 22:50:18,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3751 to 2282. [2021-11-20 22:50:18,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2282 states, 1398 states have (on average 1.9005722460658083) internal successors, (2657), 2266 states have internal predecessors, (2657), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-20 22:50:18,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2282 states to 2282 states and 2689 transitions. [2021-11-20 22:50:18,559 INFO L78 Accepts]: Start accepts. Automaton has 2282 states and 2689 transitions. Word has length 20 [2021-11-20 22:50:18,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:50:18,559 INFO L470 AbstractCegarLoop]: Abstraction has 2282 states and 2689 transitions. [2021-11-20 22:50:18,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:50:18,560 INFO L276 IsEmpty]: Start isEmpty. Operand 2282 states and 2689 transitions. [2021-11-20 22:50:18,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-20 22:50:18,561 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:50:18,561 INFO L514 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] [2021-11-20 22:50:18,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-20 22:50:18,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:50:18,777 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr40REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1091 more)] === [2021-11-20 22:50:18,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:50:18,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1063651591, now seen corresponding path program 1 times [2021-11-20 22:50:18,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:50:18,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [767969651] [2021-11-20 22:50:18,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:50:18,779 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:50:18,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:50:18,780 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:50:18,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-20 22:50:18,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:50:19,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 22:50:19,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:50:19,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:50:19,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:50:19,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:50:19,128 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:50:19,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [767969651] [2021-11-20 22:50:19,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [767969651] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:50:19,128 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:50:19,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-20 22:50:19,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626384088] [2021-11-20 22:50:19,129 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:50:19,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 22:50:19,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:50:19,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 22:50:19,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:50:19,130 INFO L87 Difference]: Start difference. First operand 2282 states and 2689 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:50:19,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:50:19,288 INFO L93 Difference]: Finished difference Result 3737 states and 4285 transitions. [2021-11-20 22:50:19,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:50:19,289 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 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 22 [2021-11-20 22:50:19,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:50:19,304 INFO L225 Difference]: With dead ends: 3737 [2021-11-20 22:50:19,304 INFO L226 Difference]: Without dead ends: 3737 [2021-11-20 22:50:19,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-20 22:50:19,306 INFO L933 BasicCegarLoop]: 3356 mSDtfsCounter, 4028 mSDsluCounter, 4924 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4038 SdHoareTripleChecker+Valid, 8280 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 22:50:19,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4038 Valid, 8280 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 22:50:19,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3737 states. [2021-11-20 22:50:19,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3737 to 2260. [2021-11-20 22:50:19,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2260 states, 1390 states have (on average 1.8906474820143886) internal successors, (2628), 2244 states have internal predecessors, (2628), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-20 22:50:19,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2260 states to 2260 states and 2660 transitions. [2021-11-20 22:50:19,361 INFO L78 Accepts]: Start accepts. Automaton has 2260 states and 2660 transitions. Word has length 22 [2021-11-20 22:50:19,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:50:19,361 INFO L470 AbstractCegarLoop]: Abstraction has 2260 states and 2660 transitions. [2021-11-20 22:50:19,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:50:19,362 INFO L276 IsEmpty]: Start isEmpty. Operand 2260 states and 2660 transitions. [2021-11-20 22:50:19,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-20 22:50:19,363 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:50:19,363 INFO L514 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] [2021-11-20 22:50:19,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-20 22:50:19,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:50:19,579 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr359REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1091 more)] === [2021-11-20 22:50:19,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:50:19,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1134259450, now seen corresponding path program 1 times [2021-11-20 22:50:19,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:50:19,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1274861989] [2021-11-20 22:50:19,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:50:19,580 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:50:19,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:50:19,581 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:50:19,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-20 22:50:19,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:50:19,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 22:50:19,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:50:19,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:50:19,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:50:19,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:50:19,883 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:50:19,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1274861989] [2021-11-20 22:50:19,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1274861989] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:50:19,884 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:50:19,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-20 22:50:19,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18306849] [2021-11-20 22:50:19,884 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:50:19,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 22:50:19,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:50:19,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 22:50:19,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:50:19,885 INFO L87 Difference]: Start difference. First operand 2260 states and 2660 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:50:20,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:50:20,035 INFO L93 Difference]: Finished difference Result 3672 states and 4162 transitions. [2021-11-20 22:50:20,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:50:20,036 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 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 22 [2021-11-20 22:50:20,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:50:20,057 INFO L225 Difference]: With dead ends: 3672 [2021-11-20 22:50:20,057 INFO L226 Difference]: Without dead ends: 3672 [2021-11-20 22:50:20,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-20 22:50:20,059 INFO L933 BasicCegarLoop]: 3502 mSDtfsCounter, 1984 mSDsluCounter, 6561 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1994 SdHoareTripleChecker+Valid, 10063 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 22:50:20,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1994 Valid, 10063 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 22:50:20,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3672 states. [2021-11-20 22:50:20,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3672 to 2222. [2021-11-20 22:50:20,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2222 states, 1366 states have (on average 1.8601756954612005) internal successors, (2541), 2206 states have internal predecessors, (2541), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-20 22:50:20,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2222 states to 2222 states and 2573 transitions. [2021-11-20 22:50:20,121 INFO L78 Accepts]: Start accepts. Automaton has 2222 states and 2573 transitions. Word has length 22 [2021-11-20 22:50:20,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:50:20,121 INFO L470 AbstractCegarLoop]: Abstraction has 2222 states and 2573 transitions. [2021-11-20 22:50:20,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:50:20,121 INFO L276 IsEmpty]: Start isEmpty. Operand 2222 states and 2573 transitions. [2021-11-20 22:50:20,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-20 22:50:20,123 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:50:20,123 INFO L514 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] [2021-11-20 22:50:20,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-20 22:50:20,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:50:20,336 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr696REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1091 more)] === [2021-11-20 22:50:20,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:50:20,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1056519613, now seen corresponding path program 1 times [2021-11-20 22:50:20,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:50:20,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1960193210] [2021-11-20 22:50:20,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:50:20,338 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:50:20,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:50:20,339 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:50:20,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-20 22:50:20,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:50:20,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 22:50:20,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:50:20,543 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 [2021-11-20 22:50:20,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:50:20,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:50:20,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:50:20,762 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:50:20,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1960193210] [2021-11-20 22:50:20,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1960193210] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:50:20,763 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:50:20,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-20 22:50:20,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34431460] [2021-11-20 22:50:20,763 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:50:20,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:50:20,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:50:20,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:50:20,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:50:20,765 INFO L87 Difference]: Start difference. First operand 2222 states and 2573 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) [2021-11-20 22:50:24,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:50:24,814 INFO L93 Difference]: Finished difference Result 2674 states and 2936 transitions. [2021-11-20 22:50:24,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:50:24,814 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 [2021-11-20 22:50:24,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:50:24,821 INFO L225 Difference]: With dead ends: 2674 [2021-11-20 22:50:24,821 INFO L226 Difference]: Without dead ends: 2674 [2021-11-20 22:50:24,822 INFO L932 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 [2021-11-20 22:50:24,823 INFO L933 BasicCegarLoop]: 1243 mSDtfsCounter, 2729 mSDsluCounter, 1097 mSDsCounter, 0 mSdLazyCounter, 1779 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2735 SdHoareTripleChecker+Valid, 2340 SdHoareTripleChecker+Invalid, 1800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2021-11-20 22:50:24,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2735 Valid, 2340 Invalid, 1800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1779 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2021-11-20 22:50:24,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2674 states. [2021-11-20 22:50:24,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2674 to 2218. [2021-11-20 22:50:24,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2218 states, 1366 states have (on average 1.857247437774524) internal successors, (2537), 2202 states have internal predecessors, (2537), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-20 22:50:24,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2218 states to 2218 states and 2569 transitions. [2021-11-20 22:50:24,867 INFO L78 Accepts]: Start accepts. Automaton has 2218 states and 2569 transitions. Word has length 27 [2021-11-20 22:50:24,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:50:24,867 INFO L470 AbstractCegarLoop]: Abstraction has 2218 states and 2569 transitions. [2021-11-20 22:50:24,868 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) [2021-11-20 22:50:24,868 INFO L276 IsEmpty]: Start isEmpty. Operand 2218 states and 2569 transitions. [2021-11-20 22:50:24,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-20 22:50:24,869 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:50:24,869 INFO L514 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] [2021-11-20 22:50:24,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-20 22:50:25,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:50:25,080 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr697REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1091 more)] === [2021-11-20 22:50:25,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:50:25,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1056519614, now seen corresponding path program 1 times [2021-11-20 22:50:25,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:50:25,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1022474745] [2021-11-20 22:50:25,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:50:25,081 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:50:25,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:50:25,082 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:50:25,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-20 22:50:25,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:50:25,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 22:50:25,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:50:25,263 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 [2021-11-20 22:50:25,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:50:25,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:50:25,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:50:25,959 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:50:25,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1022474745] [2021-11-20 22:50:25,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1022474745] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:50:25,960 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:50:25,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-20 22:50:25,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987481074] [2021-11-20 22:50:25,961 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:50:25,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 22:50:25,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:50:25,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 22:50:25,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 22:50:25,962 INFO L87 Difference]: Start difference. First operand 2218 states and 2569 transitions. Second operand has 6 states, 5 states have (on average 10.6) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:50:40,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:50:40,718 INFO L93 Difference]: Finished difference Result 3215 states and 3552 transitions. [2021-11-20 22:50:40,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 22:50:40,721 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 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 [2021-11-20 22:50:40,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:50:40,728 INFO L225 Difference]: With dead ends: 3215 [2021-11-20 22:50:40,728 INFO L226 Difference]: Without dead ends: 3215 [2021-11-20 22:50:40,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 22:50:40,729 INFO L933 BasicCegarLoop]: 1481 mSDtfsCounter, 4179 mSDsluCounter, 3074 mSDsCounter, 0 mSdLazyCounter, 3520 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4179 SdHoareTripleChecker+Valid, 4555 SdHoareTripleChecker+Invalid, 3544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 3520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.6s IncrementalHoareTripleChecker+Time [2021-11-20 22:50:40,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4179 Valid, 4555 Invalid, 3544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 3520 Invalid, 0 Unknown, 0 Unchecked, 14.6s Time] [2021-11-20 22:50:40,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3215 states. [2021-11-20 22:50:40,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3215 to 2251. [2021-11-20 22:50:40,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2251 states, 1400 states have (on average 1.8385714285714285) internal successors, (2574), 2235 states have internal predecessors, (2574), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-20 22:50:40,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2251 states to 2251 states and 2606 transitions. [2021-11-20 22:50:40,778 INFO L78 Accepts]: Start accepts. Automaton has 2251 states and 2606 transitions. Word has length 27 [2021-11-20 22:50:40,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:50:40,779 INFO L470 AbstractCegarLoop]: Abstraction has 2251 states and 2606 transitions. [2021-11-20 22:50:40,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:50:40,779 INFO L276 IsEmpty]: Start isEmpty. Operand 2251 states and 2606 transitions. [2021-11-20 22:50:40,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-20 22:50:40,781 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:50:40,781 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:50:40,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-20 22:50:40,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:50:40,994 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr54REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1091 more)] === [2021-11-20 22:50:40,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:50:40,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1781128551, now seen corresponding path program 1 times [2021-11-20 22:50:40,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:50:40,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [58058227] [2021-11-20 22:50:40,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:50:40,996 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:50:40,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:50:40,997 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:50:41,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-20 22:50:41,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:50:41,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 22:50:41,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:50:41,209 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 [2021-11-20 22:50:41,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:50:41,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:50:41,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:50:41,504 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:50:41,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [58058227] [2021-11-20 22:50:41,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [58058227] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:50:41,504 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:50:41,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-20 22:50:41,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026311471] [2021-11-20 22:50:41,505 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:50:41,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:50:41,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:50:41,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:50:41,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:50:41,506 INFO L87 Difference]: Start difference. First operand 2251 states and 2606 transitions. Second operand has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:50:48,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:50:48,184 INFO L93 Difference]: Finished difference Result 4335 states and 4885 transitions. [2021-11-20 22:50:48,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 22:50:48,185 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-20 22:50:48,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:50:48,194 INFO L225 Difference]: With dead ends: 4335 [2021-11-20 22:50:48,194 INFO L226 Difference]: Without dead ends: 4335 [2021-11-20 22:50:48,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:50:48,196 INFO L933 BasicCegarLoop]: 2413 mSDtfsCounter, 4087 mSDsluCounter, 2107 mSDsCounter, 0 mSdLazyCounter, 2785 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4094 SdHoareTripleChecker+Valid, 4520 SdHoareTripleChecker+Invalid, 2828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 2785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2021-11-20 22:50:48,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4094 Valid, 4520 Invalid, 2828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 2785 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2021-11-20 22:50:48,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4335 states. [2021-11-20 22:50:48,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4335 to 2247. [2021-11-20 22:50:48,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2247 states, 1400 states have (on average 1.8357142857142856) internal successors, (2570), 2231 states have internal predecessors, (2570), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-20 22:50:48,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2247 states to 2247 states and 2602 transitions. [2021-11-20 22:50:48,246 INFO L78 Accepts]: Start accepts. Automaton has 2247 states and 2602 transitions. Word has length 36 [2021-11-20 22:50:48,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:50:48,247 INFO L470 AbstractCegarLoop]: Abstraction has 2247 states and 2602 transitions. [2021-11-20 22:50:48,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:50:48,247 INFO L276 IsEmpty]: Start isEmpty. Operand 2247 states and 2602 transitions. [2021-11-20 22:50:48,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-20 22:50:48,249 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:50:48,249 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:50:48,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-20 22:50:48,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:50:48,463 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr55REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1091 more)] === [2021-11-20 22:50:48,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:50:48,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1781128552, now seen corresponding path program 1 times [2021-11-20 22:50:48,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:50:48,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [311805225] [2021-11-20 22:50:48,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:50:48,465 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:50:48,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:50:48,469 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:50:48,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-20 22:50:48,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:50:48,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 22:50:48,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:50:48,772 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 [2021-11-20 22:50:49,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:50:49,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:50:49,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:50:49,719 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:50:49,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [311805225] [2021-11-20 22:50:49,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [311805225] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:50:49,719 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:50:49,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-20 22:50:49,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571734057] [2021-11-20 22:50:49,720 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:50:49,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 22:50:49,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:50:49,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 22:50:49,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 22:50:49,722 INFO L87 Difference]: Start difference. First operand 2247 states and 2602 transitions. Second operand has 6 states, 5 states have (on average 13.6) 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) [2021-11-20 22:51:09,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:51:09,248 INFO L93 Difference]: Finished difference Result 4238 states and 4664 transitions. [2021-11-20 22:51:09,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 22:51:09,250 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) 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 36 [2021-11-20 22:51:09,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:51:09,262 INFO L225 Difference]: With dead ends: 4238 [2021-11-20 22:51:09,262 INFO L226 Difference]: Without dead ends: 4238 [2021-11-20 22:51:09,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 22:51:09,264 INFO L933 BasicCegarLoop]: 2733 mSDtfsCounter, 2995 mSDsluCounter, 5218 mSDsCounter, 0 mSdLazyCounter, 5330 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3000 SdHoareTripleChecker+Valid, 7951 SdHoareTripleChecker+Invalid, 5354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 5330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.3s IncrementalHoareTripleChecker+Time [2021-11-20 22:51:09,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3000 Valid, 7951 Invalid, 5354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 5330 Invalid, 0 Unknown, 0 Unchecked, 19.3s Time] [2021-11-20 22:51:09,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4238 states. [2021-11-20 22:51:09,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4238 to 2243. [2021-11-20 22:51:09,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2243 states, 1400 states have (on average 1.832857142857143) internal successors, (2566), 2227 states have internal predecessors, (2566), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-20 22:51:09,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2243 states to 2243 states and 2598 transitions. [2021-11-20 22:51:09,312 INFO L78 Accepts]: Start accepts. Automaton has 2243 states and 2598 transitions. Word has length 36 [2021-11-20 22:51:09,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:51:09,312 INFO L470 AbstractCegarLoop]: Abstraction has 2243 states and 2598 transitions. [2021-11-20 22:51:09,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) 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) [2021-11-20 22:51:09,313 INFO L276 IsEmpty]: Start isEmpty. Operand 2243 states and 2598 transitions. [2021-11-20 22:51:09,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-20 22:51:09,314 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:51:09,314 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:51:09,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-20 22:51:09,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:51:09,535 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr372REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1091 more)] === [2021-11-20 22:51:09,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:51:09,536 INFO L85 PathProgramCache]: Analyzing trace with hash -526454297, now seen corresponding path program 1 times [2021-11-20 22:51:09,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:51:09,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [259151872] [2021-11-20 22:51:09,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:51:09,537 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:51:09,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:51:09,552 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:51:09,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-20 22:51:09,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:51:09,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 22:51:09,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:51:09,843 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 [2021-11-20 22:51:09,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:51:09,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:51:10,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:51:10,137 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:51:10,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [259151872] [2021-11-20 22:51:10,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [259151872] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:51:10,137 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:51:10,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-20 22:51:10,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889870789] [2021-11-20 22:51:10,138 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:51:10,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:51:10,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:51:10,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:51:10,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:51:10,139 INFO L87 Difference]: Start difference. First operand 2243 states and 2598 transitions. Second operand has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:51:17,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:51:17,681 INFO L93 Difference]: Finished difference Result 4691 states and 5257 transitions. [2021-11-20 22:51:17,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 22:51:17,681 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-20 22:51:17,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:51:17,689 INFO L225 Difference]: With dead ends: 4691 [2021-11-20 22:51:17,689 INFO L226 Difference]: Without dead ends: 4691 [2021-11-20 22:51:17,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:51:17,691 INFO L933 BasicCegarLoop]: 2250 mSDtfsCounter, 4653 mSDsluCounter, 2296 mSDsCounter, 0 mSdLazyCounter, 2965 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4663 SdHoareTripleChecker+Valid, 4546 SdHoareTripleChecker+Invalid, 3016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 2965 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2021-11-20 22:51:17,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4663 Valid, 4546 Invalid, 3016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 2965 Invalid, 0 Unknown, 0 Unchecked, 7.4s Time] [2021-11-20 22:51:17,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4691 states. [2021-11-20 22:51:17,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4691 to 2240. [2021-11-20 22:51:17,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2240 states, 1400 states have (on average 1.825) internal successors, (2555), 2224 states have internal predecessors, (2555), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-20 22:51:17,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2240 states to 2240 states and 2587 transitions. [2021-11-20 22:51:17,740 INFO L78 Accepts]: Start accepts. Automaton has 2240 states and 2587 transitions. Word has length 36 [2021-11-20 22:51:17,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:51:17,741 INFO L470 AbstractCegarLoop]: Abstraction has 2240 states and 2587 transitions. [2021-11-20 22:51:17,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:51:17,741 INFO L276 IsEmpty]: Start isEmpty. Operand 2240 states and 2587 transitions. [2021-11-20 22:51:17,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-20 22:51:17,742 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:51:17,742 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:51:17,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-20 22:51:17,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:51:17,957 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr373REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1091 more)] === [2021-11-20 22:51:17,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:51:17,957 INFO L85 PathProgramCache]: Analyzing trace with hash -526454296, now seen corresponding path program 1 times [2021-11-20 22:51:17,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:51:17,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1191112447] [2021-11-20 22:51:17,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:51:17,958 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:51:17,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:51:17,960 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:51:17,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-20 22:51:18,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:51:18,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 22:51:18,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:51:18,236 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 [2021-11-20 22:51:18,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:51:18,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:51:19,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:51:19,123 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:51:19,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1191112447] [2021-11-20 22:51:19,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1191112447] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:51:19,123 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:51:19,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-20 22:51:19,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220154235] [2021-11-20 22:51:19,124 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:51:19,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 22:51:19,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:51:19,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 22:51:19,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 22:51:19,126 INFO L87 Difference]: Start difference. First operand 2240 states and 2587 transitions. Second operand has 6 states, 5 states have (on average 13.6) 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) [2021-11-20 22:51:43,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:51:43,052 INFO L93 Difference]: Finished difference Result 4636 states and 5142 transitions. [2021-11-20 22:51:43,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 22:51:43,054 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) 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 36 [2021-11-20 22:51:43,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:51:43,060 INFO L225 Difference]: With dead ends: 4636 [2021-11-20 22:51:43,061 INFO L226 Difference]: Without dead ends: 4636 [2021-11-20 22:51:43,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 22:51:43,062 INFO L933 BasicCegarLoop]: 2511 mSDtfsCounter, 4787 mSDsluCounter, 4490 mSDsCounter, 0 mSdLazyCounter, 4588 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4792 SdHoareTripleChecker+Valid, 7001 SdHoareTripleChecker+Invalid, 4617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 4588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.7s IncrementalHoareTripleChecker+Time [2021-11-20 22:51:43,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4792 Valid, 7001 Invalid, 4617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 4588 Invalid, 0 Unknown, 0 Unchecked, 23.7s Time] [2021-11-20 22:51:43,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4636 states. [2021-11-20 22:51:43,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4636 to 2240. [2021-11-20 22:51:43,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2240 states, 1400 states have (on average 1.822142857142857) internal successors, (2551), 2224 states have internal predecessors, (2551), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-20 22:51:43,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2240 states to 2240 states and 2583 transitions. [2021-11-20 22:51:43,135 INFO L78 Accepts]: Start accepts. Automaton has 2240 states and 2583 transitions. Word has length 36 [2021-11-20 22:51:43,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:51:43,136 INFO L470 AbstractCegarLoop]: Abstraction has 2240 states and 2583 transitions. [2021-11-20 22:51:43,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) 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) [2021-11-20 22:51:43,136 INFO L276 IsEmpty]: Start isEmpty. Operand 2240 states and 2583 transitions. [2021-11-20 22:51:43,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-20 22:51:43,137 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:51:43,137 INFO L514 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] [2021-11-20 22:51:43,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-20 22:51:43,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:51:43,350 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr704REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1091 more)] === [2021-11-20 22:51:43,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:51:43,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1782356879, now seen corresponding path program 1 times [2021-11-20 22:51:43,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:51:43,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [196097941] [2021-11-20 22:51:43,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:51:43,352 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:51:43,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:51:43,353 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:51:43,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-20 22:51:43,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:51:43,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 22:51:43,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:51:43,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:51:43,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:51:43,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:51:43,792 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:51:43,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [196097941] [2021-11-20 22:51:43,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [196097941] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:51:43,792 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:51:43,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-20 22:51:43,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831130145] [2021-11-20 22:51:43,793 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:51:43,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:51:43,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:51:43,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:51:43,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:51:43,794 INFO L87 Difference]: Start difference. First operand 2240 states and 2583 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:51:43,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:51:43,880 INFO L93 Difference]: Finished difference Result 2234 states and 2569 transitions. [2021-11-20 22:51:43,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:51:43,880 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-20 22:51:43,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:51:43,884 INFO L225 Difference]: With dead ends: 2234 [2021-11-20 22:51:43,885 INFO L226 Difference]: Without dead ends: 2234 [2021-11-20 22:51:43,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:51:43,887 INFO L933 BasicCegarLoop]: 1995 mSDtfsCounter, 959 mSDsluCounter, 3018 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 963 SdHoareTripleChecker+Valid, 5013 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 22:51:43,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [963 Valid, 5013 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 22:51:43,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2234 states. [2021-11-20 22:51:43,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2234 to 2234. [2021-11-20 22:51:43,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2234 states, 1394 states have (on average 1.8199426111908177) internal successors, (2537), 2218 states have internal predecessors, (2537), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-20 22:51:43,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2234 states to 2234 states and 2569 transitions. [2021-11-20 22:51:43,925 INFO L78 Accepts]: Start accepts. Automaton has 2234 states and 2569 transitions. Word has length 40 [2021-11-20 22:51:43,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:51:43,926 INFO L470 AbstractCegarLoop]: Abstraction has 2234 states and 2569 transitions. [2021-11-20 22:51:43,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:51:43,926 INFO L276 IsEmpty]: Start isEmpty. Operand 2234 states and 2569 transitions. [2021-11-20 22:51:43,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-20 22:51:43,929 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:51:43,929 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:51:43,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-20 22:51:44,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:51:44,145 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr704REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1091 more)] === [2021-11-20 22:51:44,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:51:44,145 INFO L85 PathProgramCache]: Analyzing trace with hash -263031357, now seen corresponding path program 1 times [2021-11-20 22:51:44,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:51:44,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1010337114] [2021-11-20 22:51:44,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:51:44,147 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:51:44,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:51:44,148 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:51:44,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-20 22:51:44,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:51:44,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 22:51:44,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:51:44,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:51:44,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:51:45,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:51:45,210 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:51:45,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1010337114] [2021-11-20 22:51:45,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1010337114] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:51:45,211 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:51:45,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-20 22:51:45,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951977052] [2021-11-20 22:51:45,215 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:51:45,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 22:51:45,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:51:45,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 22:51:45,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 22:51:45,217 INFO L87 Difference]: Start difference. First operand 2234 states and 2569 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:51:45,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:51:45,687 INFO L93 Difference]: Finished difference Result 3574 states and 4035 transitions. [2021-11-20 22:51:45,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 22:51:45,688 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-20 22:51:45,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:51:45,692 INFO L225 Difference]: With dead ends: 3574 [2021-11-20 22:51:45,692 INFO L226 Difference]: Without dead ends: 3574 [2021-11-20 22:51:45,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 22:51:45,693 INFO L933 BasicCegarLoop]: 2084 mSDtfsCounter, 1378 mSDsluCounter, 1842 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1387 SdHoareTripleChecker+Valid, 3926 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 22:51:45,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1387 Valid, 3926 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 22:51:45,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3574 states. [2021-11-20 22:51:45,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3574 to 2953. [2021-11-20 22:51:45,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2953 states, 2109 states have (on average 1.7946894262683737) internal successors, (3785), 2930 states have internal predecessors, (3785), 23 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (23), 20 states have call predecessors, (23), 23 states have call successors, (23) [2021-11-20 22:51:45,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2953 states to 2953 states and 3831 transitions. [2021-11-20 22:51:45,746 INFO L78 Accepts]: Start accepts. Automaton has 2953 states and 3831 transitions. Word has length 48 [2021-11-20 22:51:45,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:51:45,747 INFO L470 AbstractCegarLoop]: Abstraction has 2953 states and 3831 transitions. [2021-11-20 22:51:45,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:51:45,747 INFO L276 IsEmpty]: Start isEmpty. Operand 2953 states and 3831 transitions. [2021-11-20 22:51:45,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-20 22:51:45,748 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:51:45,748 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:51:45,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-20 22:51:45,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:51:45,964 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr437REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1091 more)] === [2021-11-20 22:51:45,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:51:45,964 INFO L85 PathProgramCache]: Analyzing trace with hash -435335443, now seen corresponding path program 1 times [2021-11-20 22:51:45,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:51:45,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [75229163] [2021-11-20 22:51:45,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:51:45,965 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:51:45,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:51:45,966 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:51:45,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-20 22:51:46,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:51:46,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 22:51:46,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:51:46,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:51:46,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:51:46,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:51:46,459 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:51:46,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [75229163] [2021-11-20 22:51:46,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [75229163] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:51:46,459 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:51:46,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-20 22:51:46,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020900169] [2021-11-20 22:51:46,460 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:51:46,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:51:46,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:51:46,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:51:46,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:51:46,461 INFO L87 Difference]: Start difference. First operand 2953 states and 3831 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:51:46,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:51:46,534 INFO L93 Difference]: Finished difference Result 4103 states and 5047 transitions. [2021-11-20 22:51:46,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:51:46,535 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-20 22:51:46,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:51:46,540 INFO L225 Difference]: With dead ends: 4103 [2021-11-20 22:51:46,540 INFO L226 Difference]: Without dead ends: 4103 [2021-11-20 22:51:46,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:51:46,541 INFO L933 BasicCegarLoop]: 3270 mSDtfsCounter, 1953 mSDsluCounter, 4567 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1963 SdHoareTripleChecker+Valid, 7837 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 22:51:46,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1963 Valid, 7837 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 22:51:46,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4103 states. [2021-11-20 22:51:46,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4103 to 2929. [2021-11-20 22:51:46,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2929 states, 2085 states have (on average 1.7961630695443644) internal successors, (3745), 2906 states have internal predecessors, (3745), 23 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (23), 20 states have call predecessors, (23), 23 states have call successors, (23) [2021-11-20 22:51:46,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2929 states to 2929 states and 3791 transitions. [2021-11-20 22:51:46,627 INFO L78 Accepts]: Start accepts. Automaton has 2929 states and 3791 transitions. Word has length 51 [2021-11-20 22:51:46,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:51:46,627 INFO L470 AbstractCegarLoop]: Abstraction has 2929 states and 3791 transitions. [2021-11-20 22:51:46,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:51:46,627 INFO L276 IsEmpty]: Start isEmpty. Operand 2929 states and 3791 transitions. [2021-11-20 22:51:46,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-20 22:51:46,628 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:51:46,629 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:51:46,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-20 22:51:46,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:51:46,836 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr73REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1091 more)] === [2021-11-20 22:51:46,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:51:46,837 INFO L85 PathProgramCache]: Analyzing trace with hash -273786554, now seen corresponding path program 1 times [2021-11-20 22:51:46,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:51:46,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1977852943] [2021-11-20 22:51:46,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:51:46,838 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:51:46,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:51:46,839 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:51:46,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-20 22:51:47,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:51:47,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 22:51:47,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:51:47,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:51:47,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:51:47,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:51:47,390 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:51:47,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1977852943] [2021-11-20 22:51:47,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1977852943] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:51:47,390 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:51:47,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-20 22:51:47,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365556702] [2021-11-20 22:51:47,391 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:51:47,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:51:47,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:51:47,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:51:47,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:51:47,392 INFO L87 Difference]: Start difference. First operand 2929 states and 3791 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:51:47,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:51:47,502 INFO L93 Difference]: Finished difference Result 3848 states and 4545 transitions. [2021-11-20 22:51:47,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:51:47,503 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-20 22:51:47,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:51:47,510 INFO L225 Difference]: With dead ends: 3848 [2021-11-20 22:51:47,510 INFO L226 Difference]: Without dead ends: 3848 [2021-11-20 22:51:47,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:51:47,512 INFO L933 BasicCegarLoop]: 3311 mSDtfsCounter, 1944 mSDsluCounter, 4658 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1954 SdHoareTripleChecker+Valid, 7969 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 22:51:47,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1954 Valid, 7969 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 22:51:47,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3848 states. [2021-11-20 22:51:47,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3848 to 2917. [2021-11-20 22:51:47,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2917 states, 2073 states have (on average 1.7969126869271588) internal successors, (3725), 2894 states have internal predecessors, (3725), 23 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (23), 20 states have call predecessors, (23), 23 states have call successors, (23) [2021-11-20 22:51:47,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2917 states to 2917 states and 3771 transitions. [2021-11-20 22:51:47,581 INFO L78 Accepts]: Start accepts. Automaton has 2917 states and 3771 transitions. Word has length 54 [2021-11-20 22:51:47,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:51:47,581 INFO L470 AbstractCegarLoop]: Abstraction has 2917 states and 3771 transitions. [2021-11-20 22:51:47,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:51:47,582 INFO L276 IsEmpty]: Start isEmpty. Operand 2917 states and 3771 transitions. [2021-11-20 22:51:47,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-20 22:51:47,583 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:51:47,583 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:51:47,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-20 22:51:47,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:51:47,796 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1091 more)] === [2021-11-20 22:51:47,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:51:47,797 INFO L85 PathProgramCache]: Analyzing trace with hash -665468730, now seen corresponding path program 1 times [2021-11-20 22:51:47,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:51:47,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [199704598] [2021-11-20 22:51:47,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:51:47,797 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:51:47,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:51:47,798 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:51:47,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-20 22:51:48,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:51:48,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 22:51:48,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:51:48,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:51:48,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:51:48,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:51:48,119 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-20 22:51:48,119 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 3 case distinctions, treesize of input 30 treesize of output 36 [2021-11-20 22:51:48,179 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-20 22:51:48,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 23 [2021-11-20 22:51:48,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:51:48,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:51:48,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:51:48,498 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:51:48,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [199704598] [2021-11-20 22:51:48,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [199704598] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:51:48,499 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:51:48,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 22:51:48,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334096577] [2021-11-20 22:51:48,499 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:51:48,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 22:51:48,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:51:48,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 22:51:48,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 22:51:48,501 INFO L87 Difference]: Start difference. First operand 2917 states and 3771 transitions. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:51:52,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:51:52,323 INFO L93 Difference]: Finished difference Result 3022 states and 3882 transitions. [2021-11-20 22:51:52,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 22:51:52,324 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-20 22:51:52,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:51:52,328 INFO L225 Difference]: With dead ends: 3022 [2021-11-20 22:51:52,328 INFO L226 Difference]: Without dead ends: 3022 [2021-11-20 22:51:52,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-20 22:51:52,329 INFO L933 BasicCegarLoop]: 1886 mSDtfsCounter, 903 mSDsluCounter, 6545 mSDsCounter, 0 mSdLazyCounter, 816 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 907 SdHoareTripleChecker+Valid, 8431 SdHoareTripleChecker+Invalid, 819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-11-20 22:51:52,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [907 Valid, 8431 Invalid, 819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 816 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2021-11-20 22:51:52,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3022 states. [2021-11-20 22:51:52,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3022 to 2883. [2021-11-20 22:51:52,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2883 states, 2039 states have (on average 1.8097106424718) internal successors, (3690), 2860 states have internal predecessors, (3690), 23 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (23), 20 states have call predecessors, (23), 23 states have call successors, (23) [2021-11-20 22:51:52,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2883 states to 2883 states and 3736 transitions. [2021-11-20 22:51:52,369 INFO L78 Accepts]: Start accepts. Automaton has 2883 states and 3736 transitions. Word has length 57 [2021-11-20 22:51:52,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:51:52,370 INFO L470 AbstractCegarLoop]: Abstraction has 2883 states and 3736 transitions. [2021-11-20 22:51:52,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:51:52,370 INFO L276 IsEmpty]: Start isEmpty. Operand 2883 states and 3736 transitions. [2021-11-20 22:51:52,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-20 22:51:52,371 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:51:52,372 INFO L514 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] [2021-11-20 22:51:52,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-20 22:51:52,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:51:52,588 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr437REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1091 more)] === [2021-11-20 22:51:52,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:51:52,589 INFO L85 PathProgramCache]: Analyzing trace with hash 122106401, now seen corresponding path program 1 times [2021-11-20 22:51:52,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:51:52,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [337466778] [2021-11-20 22:51:52,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:51:52,590 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:51:52,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:51:52,593 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:51:52,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-20 22:51:52,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:51:52,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 22:51:52,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:51:53,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:51:53,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:51:53,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:51:53,945 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:51:53,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [337466778] [2021-11-20 22:51:53,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [337466778] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:51:53,945 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:51:53,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-20 22:51:53,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992500084] [2021-11-20 22:51:53,946 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:51:53,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 22:51:53,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:51:53,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 22:51:53,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 22:51:53,947 INFO L87 Difference]: Start difference. First operand 2883 states and 3736 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 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) [2021-11-20 22:51:54,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:51:54,174 INFO L93 Difference]: Finished difference Result 4147 states and 5185 transitions. [2021-11-20 22:51:54,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 22:51:54,177 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 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 [2021-11-20 22:51:54,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:51:54,184 INFO L225 Difference]: With dead ends: 4147 [2021-11-20 22:51:54,185 INFO L226 Difference]: Without dead ends: 4147 [2021-11-20 22:51:54,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 22:51:54,186 INFO L933 BasicCegarLoop]: 2356 mSDtfsCounter, 1075 mSDsluCounter, 1871 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1083 SdHoareTripleChecker+Valid, 4227 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 22:51:54,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1083 Valid, 4227 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 22:51:54,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4147 states. [2021-11-20 22:51:54,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4147 to 3606. [2021-11-20 22:51:54,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3606 states, 2758 states have (on average 1.777012327773749) internal successors, (4901), 3576 states have internal predecessors, (4901), 30 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (30), 27 states have call predecessors, (30), 30 states have call successors, (30) [2021-11-20 22:51:54,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3606 states to 3606 states and 4961 transitions. [2021-11-20 22:51:54,258 INFO L78 Accepts]: Start accepts. Automaton has 3606 states and 4961 transitions. Word has length 59 [2021-11-20 22:51:54,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:51:54,259 INFO L470 AbstractCegarLoop]: Abstraction has 3606 states and 4961 transitions. [2021-11-20 22:51:54,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 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) [2021-11-20 22:51:54,260 INFO L276 IsEmpty]: Start isEmpty. Operand 3606 states and 4961 transitions. [2021-11-20 22:51:54,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-20 22:51:54,261 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:51:54,261 INFO L514 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] [2021-11-20 22:51:54,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-20 22:51:54,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:51:54,477 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr73REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1091 more)] === [2021-11-20 22:51:54,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:51:54,478 INFO L85 PathProgramCache]: Analyzing trace with hash -45497454, now seen corresponding path program 1 times [2021-11-20 22:51:54,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:51:54,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1792209795] [2021-11-20 22:51:54,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:51:54,480 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:51:54,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:51:54,481 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:51:54,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-20 22:51:54,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:51:54,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 22:51:54,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:51:54,977 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 [2021-11-20 22:51:54,984 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 [2021-11-20 22:51:55,717 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 22:51:55,718 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 [2021-11-20 22:51:55,723 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 22:51:55,724 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 [2021-11-20 22:51:55,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:51:55,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:52:01,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:52:01,155 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:52:01,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1792209795] [2021-11-20 22:52:01,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1792209795] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:52:01,156 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:52:01,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-20 22:52:01,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820080954] [2021-11-20 22:52:01,157 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:52:01,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 22:52:01,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:52:01,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 22:52:01,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=16, Unknown=1, NotChecked=0, Total=30 [2021-11-20 22:52:01,159 INFO L87 Difference]: Start difference. First operand 3606 states and 4961 transitions. Second operand has 6 states, 5 states have (on average 24.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:52:17,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:52:17,059 INFO L93 Difference]: Finished difference Result 7022 states and 9543 transitions. [2021-11-20 22:52:17,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 22:52:17,060 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 24.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 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 62 [2021-11-20 22:52:17,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:52:17,068 INFO L225 Difference]: With dead ends: 7022 [2021-11-20 22:52:17,068 INFO L226 Difference]: Without dead ends: 7022 [2021-11-20 22:52:17,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=19, Invalid=22, Unknown=1, NotChecked=0, Total=42 [2021-11-20 22:52:17,069 INFO L933 BasicCegarLoop]: 1172 mSDtfsCounter, 2804 mSDsluCounter, 3339 mSDsCounter, 0 mSdLazyCounter, 3283 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2819 SdHoareTripleChecker+Valid, 4511 SdHoareTripleChecker+Invalid, 6991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 3283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3633 IncrementalHoareTripleChecker+Unchecked, 15.7s IncrementalHoareTripleChecker+Time [2021-11-20 22:52:17,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2819 Valid, 4511 Invalid, 6991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 3283 Invalid, 0 Unknown, 3633 Unchecked, 15.7s Time] [2021-11-20 22:52:17,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7022 states. [2021-11-20 22:52:17,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7022 to 3733. [2021-11-20 22:52:17,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3733 states, 2917 states have (on average 1.750771340418238) internal successors, (5107), 3700 states have internal predecessors, (5107), 33 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (33), 30 states have call predecessors, (33), 33 states have call successors, (33) [2021-11-20 22:52:17,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3733 states to 3733 states and 5173 transitions. [2021-11-20 22:52:17,157 INFO L78 Accepts]: Start accepts. Automaton has 3733 states and 5173 transitions. Word has length 62 [2021-11-20 22:52:17,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:52:17,158 INFO L470 AbstractCegarLoop]: Abstraction has 3733 states and 5173 transitions. [2021-11-20 22:52:17,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 24.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:52:17,158 INFO L276 IsEmpty]: Start isEmpty. Operand 3733 states and 5173 transitions. [2021-11-20 22:52:17,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-20 22:52:17,159 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:52:17,160 INFO L514 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] [2021-11-20 22:52:17,180 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-20 22:52:17,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:52:17,380 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr75REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1091 more)] === [2021-11-20 22:52:17,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:52:17,380 INFO L85 PathProgramCache]: Analyzing trace with hash -773371597, now seen corresponding path program 1 times [2021-11-20 22:52:17,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:52:17,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1616389675] [2021-11-20 22:52:17,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:52:17,381 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:52:17,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:52:17,383 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:52:17,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-20 22:52:17,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:52:17,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 22:52:17,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:52:17,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:52:17,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:52:17,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 treesize of output 6 [2021-11-20 22:52:18,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:52:18,263 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:52:18,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1616389675] [2021-11-20 22:52:18,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1616389675] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:52:18,264 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:52:18,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-20 22:52:18,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945933432] [2021-11-20 22:52:18,264 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:52:18,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 22:52:18,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:52:18,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 22:52:18,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-20 22:52:18,266 INFO L87 Difference]: Start difference. First operand 3733 states and 5173 transitions. Second operand has 6 states, 5 states have (on average 24.8) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:52:21,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:52:21,691 INFO L93 Difference]: Finished difference Result 3731 states and 5169 transitions. [2021-11-20 22:52:21,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:52:21,692 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 24.8) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 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 [2021-11-20 22:52:21,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:52:21,698 INFO L225 Difference]: With dead ends: 3731 [2021-11-20 22:52:21,698 INFO L226 Difference]: Without dead ends: 3731 [2021-11-20 22:52:21,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-20 22:52:21,699 INFO L933 BasicCegarLoop]: 1176 mSDtfsCounter, 4975 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 833 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4985 SdHoareTripleChecker+Valid, 1670 SdHoareTripleChecker+Invalid, 881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-11-20 22:52:21,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4985 Valid, 1670 Invalid, 881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 833 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-11-20 22:52:21,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3731 states. [2021-11-20 22:52:21,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3731 to 3731. [2021-11-20 22:52:21,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3731 states, 2917 states have (on average 1.7494000685635926) internal successors, (5103), 3698 states have internal predecessors, (5103), 33 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (33), 30 states have call predecessors, (33), 33 states have call successors, (33) [2021-11-20 22:52:21,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3731 states to 3731 states and 5169 transitions. [2021-11-20 22:52:21,756 INFO L78 Accepts]: Start accepts. Automaton has 3731 states and 5169 transitions. Word has length 64 [2021-11-20 22:52:21,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:52:21,756 INFO L470 AbstractCegarLoop]: Abstraction has 3731 states and 5169 transitions. [2021-11-20 22:52:21,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 24.8) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:52:21,757 INFO L276 IsEmpty]: Start isEmpty. Operand 3731 states and 5169 transitions. [2021-11-20 22:52:21,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-20 22:52:21,758 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:52:21,758 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:52:21,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-20 22:52:21,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:52:21,972 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr78REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1091 more)] === [2021-11-20 22:52:21,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:52:21,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1308391416, now seen corresponding path program 1 times [2021-11-20 22:52:21,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:52:21,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [551032770] [2021-11-20 22:52:21,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:52:21,974 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:52:21,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:52:21,975 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:52:22,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-20 22:52:22,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:52:22,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 22:52:22,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:52:22,502 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 [2021-11-20 22:52:22,521 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 22 treesize of output 18 [2021-11-20 22:52:22,571 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 25 treesize of output 13 [2021-11-20 22:52:22,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:52:22,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:52:22,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:52:22,777 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:52:22,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [551032770] [2021-11-20 22:52:22,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [551032770] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:52:22,778 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:52:22,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-20 22:52:22,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215987091] [2021-11-20 22:52:22,779 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:52:22,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 22:52:22,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:52:22,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 22:52:22,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:52:22,780 INFO L87 Difference]: Start difference. First operand 3731 states and 5169 transitions. Second operand has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:52:29,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:52:29,287 INFO L93 Difference]: Finished difference Result 3730 states and 5167 transitions. [2021-11-20 22:52:29,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 22:52:29,288 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-20 22:52:29,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:52:29,292 INFO L225 Difference]: With dead ends: 3730 [2021-11-20 22:52:29,292 INFO L226 Difference]: Without dead ends: 3730 [2021-11-20 22:52:29,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 126 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-20 22:52:29,293 INFO L933 BasicCegarLoop]: 1964 mSDtfsCounter, 4 mSDsluCounter, 3252 mSDsCounter, 0 mSdLazyCounter, 2645 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 5216 SdHoareTripleChecker+Invalid, 2646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2021-11-20 22:52:29,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 5216 Invalid, 2646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2645 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2021-11-20 22:52:29,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3730 states. [2021-11-20 22:52:29,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3730 to 3730. [2021-11-20 22:52:29,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3730 states, 2917 states have (on average 1.7487144326362702) internal successors, (5101), 3697 states have internal predecessors, (5101), 33 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (33), 30 states have call predecessors, (33), 33 states have call successors, (33) [2021-11-20 22:52:29,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3730 states to 3730 states and 5167 transitions. [2021-11-20 22:52:29,346 INFO L78 Accepts]: Start accepts. Automaton has 3730 states and 5167 transitions. Word has length 67 [2021-11-20 22:52:29,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:52:29,346 INFO L470 AbstractCegarLoop]: Abstraction has 3730 states and 5167 transitions. [2021-11-20 22:52:29,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:52:29,347 INFO L276 IsEmpty]: Start isEmpty. Operand 3730 states and 5167 transitions. [2021-11-20 22:52:29,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-20 22:52:29,348 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:52:29,348 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:52:29,383 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2021-11-20 22:52:29,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:52:29,586 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr79REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1091 more)] === [2021-11-20 22:52:29,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:52:29,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1308391415, now seen corresponding path program 1 times [2021-11-20 22:52:29,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:52:29,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [107852158] [2021-11-20 22:52:29,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:52:29,588 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:52:29,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:52:29,591 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:52:29,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-20 22:52:29,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:52:29,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 22:52:29,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:52:30,114 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 [2021-11-20 22:52:30,145 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 [2021-11-20 22:52:30,154 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 [2021-11-20 22:52:30,215 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 [2021-11-20 22:52:30,222 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 [2021-11-20 22:52:30,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:52:30,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:52:30,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:52:30,679 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:52:30,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [107852158] [2021-11-20 22:52:30,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [107852158] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:52:30,680 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:52:30,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-20 22:52:30,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964828120] [2021-11-20 22:52:30,682 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:52:30,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 22:52:30,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:52:30,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 22:52:30,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-20 22:52:30,685 INFO L87 Difference]: Start difference. First operand 3730 states and 5167 transitions. Second operand has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:52:49,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:52:49,882 INFO L93 Difference]: Finished difference Result 3729 states and 5165 transitions. [2021-11-20 22:52:49,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 22:52:49,883 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-20 22:52:49,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:52:49,902 INFO L225 Difference]: With dead ends: 3729 [2021-11-20 22:52:49,902 INFO L226 Difference]: Without dead ends: 3729 [2021-11-20 22:52:49,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-20 22:52:49,903 INFO L933 BasicCegarLoop]: 1964 mSDtfsCounter, 2 mSDsluCounter, 6354 mSDsCounter, 0 mSdLazyCounter, 5433 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 8318 SdHoareTripleChecker+Invalid, 5434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.0s IncrementalHoareTripleChecker+Time [2021-11-20 22:52:49,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 8318 Invalid, 5434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5433 Invalid, 0 Unknown, 0 Unchecked, 19.0s Time] [2021-11-20 22:52:49,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3729 states. [2021-11-20 22:52:49,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3729 to 3729. [2021-11-20 22:52:49,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3729 states, 2915 states have (on average 1.7492281303602057) internal successors, (5099), 3696 states have internal predecessors, (5099), 33 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (33), 30 states have call predecessors, (33), 33 states have call successors, (33) [2021-11-20 22:52:49,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3729 states to 3729 states and 5165 transitions. [2021-11-20 22:52:49,947 INFO L78 Accepts]: Start accepts. Automaton has 3729 states and 5165 transitions. Word has length 67 [2021-11-20 22:52:49,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:52:49,947 INFO L470 AbstractCegarLoop]: Abstraction has 3729 states and 5165 transitions. [2021-11-20 22:52:49,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:52:49,948 INFO L276 IsEmpty]: Start isEmpty. Operand 3729 states and 5165 transitions. [2021-11-20 22:52:49,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-20 22:52:49,949 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:52:49,949 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:52:49,969 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-20 22:52:50,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:52:50,170 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr396REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1091 more)] === [2021-11-20 22:52:50,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:52:50,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1173564532, now seen corresponding path program 1 times [2021-11-20 22:52:50,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:52:50,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [297716194] [2021-11-20 22:52:50,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:52:50,171 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:52:50,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:52:50,172 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:52:50,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-20 22:52:50,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:52:50,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 22:52:50,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:52:50,493 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 [2021-11-20 22:52:50,505 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 22 treesize of output 18 [2021-11-20 22:52:50,543 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 25 treesize of output 13 [2021-11-20 22:52:50,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:52:50,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:52:50,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:52:50,666 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:52:50,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [297716194] [2021-11-20 22:52:50,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [297716194] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:52:50,666 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:52:50,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-20 22:52:50,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509966020] [2021-11-20 22:52:50,667 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:52:50,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 22:52:50,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:52:50,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 22:52:50,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:52:50,668 INFO L87 Difference]: Start difference. First operand 3729 states and 5165 transitions. Second operand has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:52:55,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:52:55,655 INFO L93 Difference]: Finished difference Result 3728 states and 5161 transitions. [2021-11-20 22:52:55,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 22:52:55,656 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-20 22:52:55,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:52:55,659 INFO L225 Difference]: With dead ends: 3728 [2021-11-20 22:52:55,659 INFO L226 Difference]: Without dead ends: 3728 [2021-11-20 22:52:55,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 127 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-20 22:52:55,660 INFO L933 BasicCegarLoop]: 1960 mSDtfsCounter, 7 mSDsluCounter, 3244 mSDsCounter, 0 mSdLazyCounter, 2646 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 5204 SdHoareTripleChecker+Invalid, 2647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2021-11-20 22:52:55,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 5204 Invalid, 2647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2646 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2021-11-20 22:52:55,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3728 states. [2021-11-20 22:52:55,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3728 to 3728. [2021-11-20 22:52:55,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3728 states, 2915 states have (on average 1.7478559176672384) internal successors, (5095), 3695 states have internal predecessors, (5095), 33 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (33), 30 states have call predecessors, (33), 33 states have call successors, (33) [2021-11-20 22:52:55,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3728 states to 3728 states and 5161 transitions. [2021-11-20 22:52:55,691 INFO L78 Accepts]: Start accepts. Automaton has 3728 states and 5161 transitions. Word has length 67 [2021-11-20 22:52:55,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:52:55,691 INFO L470 AbstractCegarLoop]: Abstraction has 3728 states and 5161 transitions. [2021-11-20 22:52:55,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:52:55,692 INFO L276 IsEmpty]: Start isEmpty. Operand 3728 states and 5161 transitions. [2021-11-20 22:52:55,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-20 22:52:55,692 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:52:55,692 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:52:55,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-20 22:52:55,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:52:55,893 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr397REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1091 more)] === [2021-11-20 22:52:55,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:52:55,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1173564533, now seen corresponding path program 1 times [2021-11-20 22:52:55,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:52:55,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [277033808] [2021-11-20 22:52:55,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:52:55,894 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:52:55,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:52:55,895 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:52:55,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-20 22:52:56,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:52:56,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 22:52:56,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:52:56,229 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 [2021-11-20 22:52:56,246 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 [2021-11-20 22:52:56,253 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 [2021-11-20 22:52:56,299 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 [2021-11-20 22:52:56,302 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 [2021-11-20 22:52:56,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:52:56,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:52:56,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:52:56,648 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:52:56,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [277033808] [2021-11-20 22:52:56,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [277033808] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:52:56,649 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:52:56,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-20 22:52:56,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123178066] [2021-11-20 22:52:56,649 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:52:56,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 22:52:56,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:52:56,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 22:52:56,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-20 22:52:56,650 INFO L87 Difference]: Start difference. First operand 3728 states and 5161 transitions. Second operand has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:53:14,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:53:14,939 INFO L93 Difference]: Finished difference Result 3727 states and 5157 transitions. [2021-11-20 22:53:14,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 22:53:14,941 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-20 22:53:14,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:53:14,944 INFO L225 Difference]: With dead ends: 3727 [2021-11-20 22:53:14,944 INFO L226 Difference]: Without dead ends: 3727 [2021-11-20 22:53:14,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-20 22:53:14,945 INFO L933 BasicCegarLoop]: 1959 mSDtfsCounter, 5 mSDsluCounter, 6348 mSDsCounter, 0 mSdLazyCounter, 5424 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 8307 SdHoareTripleChecker+Invalid, 5425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.1s IncrementalHoareTripleChecker+Time [2021-11-20 22:53:14,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 8307 Invalid, 5425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5424 Invalid, 0 Unknown, 0 Unchecked, 18.1s Time] [2021-11-20 22:53:14,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3727 states. [2021-11-20 22:53:14,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3727 to 3727. [2021-11-20 22:53:14,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3727 states, 2911 states have (on average 1.7488835451734799) internal successors, (5091), 3694 states have internal predecessors, (5091), 33 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (33), 30 states have call predecessors, (33), 33 states have call successors, (33) [2021-11-20 22:53:14,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3727 states to 3727 states and 5157 transitions. [2021-11-20 22:53:14,987 INFO L78 Accepts]: Start accepts. Automaton has 3727 states and 5157 transitions. Word has length 67 [2021-11-20 22:53:14,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:53:14,987 INFO L470 AbstractCegarLoop]: Abstraction has 3727 states and 5157 transitions. [2021-11-20 22:53:14,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:53:14,987 INFO L276 IsEmpty]: Start isEmpty. Operand 3727 states and 5157 transitions. [2021-11-20 22:53:14,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-20 22:53:14,988 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:53:14,989 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:53:15,003 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2021-11-20 22:53:15,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:53:15,203 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr82REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1091 more)] === [2021-11-20 22:53:15,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:53:15,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1448028751, now seen corresponding path program 1 times [2021-11-20 22:53:15,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:53:15,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [28113829] [2021-11-20 22:53:15,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:53:15,205 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:53:15,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:53:15,206 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:53:15,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-20 22:53:15,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:53:15,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 22:53:15,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:53:15,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:53:15,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:53:15,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:53:15,823 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:53:15,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [28113829] [2021-11-20 22:53:15,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [28113829] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:53:15,823 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:53:15,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 22:53:15,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381707692] [2021-11-20 22:53:15,824 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:53:15,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 22:53:15,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:53:15,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 22:53:15,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-20 22:53:15,825 INFO L87 Difference]: Start difference. First operand 3727 states and 5157 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 22:53:15,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:53:15,971 INFO L93 Difference]: Finished difference Result 3737 states and 5174 transitions. [2021-11-20 22:53:15,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 22:53:15,972 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 75 [2021-11-20 22:53:15,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:53:15,983 INFO L225 Difference]: With dead ends: 3737 [2021-11-20 22:53:15,983 INFO L226 Difference]: Without dead ends: 3737 [2021-11-20 22:53:15,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-20 22:53:15,984 INFO L933 BasicCegarLoop]: 1960 mSDtfsCounter, 11 mSDsluCounter, 1959 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 3919 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 22:53:15,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 3919 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 22:53:15,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3737 states. [2021-11-20 22:53:16,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3737 to 3737. [2021-11-20 22:53:16,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3737 states, 2919 states have (on average 1.7482014388489209) internal successors, (5103), 3703 states have internal predecessors, (5103), 33 states have call successors, (33), 4 states have call predecessors, (33), 5 states have return successors, (38), 30 states have call predecessors, (38), 33 states have call successors, (38) [2021-11-20 22:53:16,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3737 states to 3737 states and 5174 transitions. [2021-11-20 22:53:16,047 INFO L78 Accepts]: Start accepts. Automaton has 3737 states and 5174 transitions. Word has length 75 [2021-11-20 22:53:16,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:53:16,048 INFO L470 AbstractCegarLoop]: Abstraction has 3737 states and 5174 transitions. [2021-11-20 22:53:16,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 22:53:16,048 INFO L276 IsEmpty]: Start isEmpty. Operand 3737 states and 5174 transitions. [2021-11-20 22:53:16,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-20 22:53:16,049 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:53:16,050 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:53:16,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-20 22:53:16,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:53:16,264 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr82REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1091 more)] === [2021-11-20 22:53:16,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:53:16,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1921538705, now seen corresponding path program 1 times [2021-11-20 22:53:16,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:53:16,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [886472779] [2021-11-20 22:53:16,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:53:16,265 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:53:16,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:53:16,266 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:53:16,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-20 22:53:16,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:53:16,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 22:53:16,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:53:16,690 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:53:16,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:53:16,967 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:53:16,967 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:53:16,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [886472779] [2021-11-20 22:53:16,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [886472779] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:53:16,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [487465244] [2021-11-20 22:53:16,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:53:16,968 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-20 22:53:16,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-20 22:53:16,970 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-20 22:53:16,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-11-20 22:53:17,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:53:17,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 22:53:17,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:53:17,555 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:53:17,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:53:17,727 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:53:17,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [487465244] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:53:17,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296300136] [2021-11-20 22:53:17,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:53:17,728 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:53:17,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:53:17,730 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:53:17,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-20 22:53:17,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:53:18,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 22:53:18,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:53:18,165 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:53:18,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:53:18,396 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:53:18,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296300136] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:53:18,396 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-20 22:53:18,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 14 [2021-11-20 22:53:18,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487218138] [2021-11-20 22:53:18,397 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-20 22:53:18,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 22:53:18,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:53:18,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 22:53:18,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-11-20 22:53:18,398 INFO L87 Difference]: Start difference. First operand 3737 states and 5174 transitions. Second operand has 14 states, 14 states have (on average 6.142857142857143) internal successors, (86), 14 states have internal predecessors, (86), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 22:53:18,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:53:18,954 INFO L93 Difference]: Finished difference Result 3751 states and 5195 transitions. [2021-11-20 22:53:18,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 22:53:18,955 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.142857142857143) internal successors, (86), 14 states have internal predecessors, (86), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 77 [2021-11-20 22:53:18,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:53:18,966 INFO L225 Difference]: With dead ends: 3751 [2021-11-20 22:53:18,966 INFO L226 Difference]: Without dead ends: 3745 [2021-11-20 22:53:18,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 444 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=188, Invalid=318, Unknown=0, NotChecked=0, Total=506 [2021-11-20 22:53:18,967 INFO L933 BasicCegarLoop]: 1960 mSDtfsCounter, 43 mSDsluCounter, 5873 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 7833 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 22:53:18,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 7833 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 22:53:18,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3745 states. [2021-11-20 22:53:19,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3745 to 3743. [2021-11-20 22:53:19,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3743 states, 2925 states have (on average 1.747008547008547) internal successors, (5110), 3709 states have internal predecessors, (5110), 33 states have call successors, (33), 4 states have call predecessors, (33), 5 states have return successors, (38), 30 states have call predecessors, (38), 33 states have call successors, (38) [2021-11-20 22:53:19,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3743 states to 3743 states and 5181 transitions. [2021-11-20 22:53:19,020 INFO L78 Accepts]: Start accepts. Automaton has 3743 states and 5181 transitions. Word has length 77 [2021-11-20 22:53:19,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:53:19,021 INFO L470 AbstractCegarLoop]: Abstraction has 3743 states and 5181 transitions. [2021-11-20 22:53:19,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.142857142857143) internal successors, (86), 14 states have internal predecessors, (86), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 22:53:19,021 INFO L276 IsEmpty]: Start isEmpty. Operand 3743 states and 5181 transitions. [2021-11-20 22:53:19,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-20 22:53:19,022 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:53:19,022 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:53:19,037 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2021-11-20 22:53:19,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2021-11-20 22:53:19,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-20 22:53:19,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:53:19,638 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr82REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1091 more)] === [2021-11-20 22:53:19,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:53:19,638 INFO L85 PathProgramCache]: Analyzing trace with hash -962346065, now seen corresponding path program 2 times [2021-11-20 22:53:19,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:53:19,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [703487717] [2021-11-20 22:53:19,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 22:53:19,639 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:53:19,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:53:19,640 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:53:19,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-20 22:53:20,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 22:53:20,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 22:53:20,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 22:53:20,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:53:20,344 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:53:20,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:53:20,803 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:53:20,803 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:53:20,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [703487717] [2021-11-20 22:53:20,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [703487717] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:53:20,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [192790813] [2021-11-20 22:53:20,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 22:53:20,804 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-20 22:53:20,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-20 22:53:20,821 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-20 22:53:20,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2021-11-20 22:53:21,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 22:53:21,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 22:53:21,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 22:53:21,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:53:21,738 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:53:21,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:53:21,960 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:53:21,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [192790813] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:53:21,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189168673] [2021-11-20 22:53:21,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 22:53:21,961 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:53:21,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:53:21,962 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:53:21,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c1aa655-f216-44ad-a818-a0d79d1f1d63/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-20 22:53:36,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 22:53:36,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 22:53:36,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-20 22:53:36,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:53:36,298 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 [2021-11-20 22:53:36,544 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 22:53:36,545 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 15 treesize of output 15 [2021-11-20 22:53:36,588 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 18 treesize of output 14 [2021-11-20 22:55:13,515 WARN L227 SmtUtils]: Spent 15.47s on a formula simplification. DAG size of input: 114 DAG size of output: 34 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-20 22:55:13,516 INFO L354 Elim1Store]: treesize reduction 884, result has 5.9 percent of original size [2021-11-20 22:55:13,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 79 [2021-11-20 22:55:14,155 INFO L354 Elim1Store]: treesize reduction 276, result has 0.4 percent of original size [2021-11-20 22:55:14,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 125 treesize of output 38 [2021-11-20 22:55:14,267 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 15 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:55:14,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:55:15,703 INFO L354 Elim1Store]: treesize reduction 5, result has 89.8 percent of original size [2021-11-20 22:55:15,703 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 61 treesize of output 60 [2021-11-20 23:00:40,446 INFO L354 Elim1Store]: treesize reduction 5, result has 89.8 percent of original size [2021-11-20 23:00:40,447 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 112 treesize of output 111 [2021-11-20 23:00:43,582 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_#Ultimate.C_memset_#t~loopctr499_118| (_ BitVec 32)) (|v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_2| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr499_116| (_ BitVec 32)) (|v_ULTIMATE.start_main_~user~0#1.offset_BEFORE_CALL_2| (_ BitVec 32)) (|#Ultimate.C_memset_#t~loopctr499| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr499_120| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr499_114| (_ BitVec 32)) (|#Ultimate.C_memset_#ptr.offset| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr499_112| (_ BitVec 32))) (or (exists ((|v_#Ultimate.C_memset_#t~loopctr499_108| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr499_107| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr499_105| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr499_109| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr499_104| (_ BitVec 32)) (|v_#Ultimate.C_memset_#ptr.offset_18| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr499_103| (_ BitVec 32))) (not (= (select (select (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| (store (store (store (store (store (store (select |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base|) (bvadd |v_#Ultimate.C_memset_#t~loopctr499_109| |v_#Ultimate.C_memset_#ptr.offset_18|) (_ bv0 32)) (bvadd |v_#Ultimate.C_memset_#t~loopctr499_108| |v_#Ultimate.C_memset_#ptr.offset_18|) (_ bv0 32)) (bvadd |v_#Ultimate.C_memset_#t~loopctr499_107| |v_#Ultimate.C_memset_#ptr.offset_18|) (_ bv0 32)) (bvadd |v_#Ultimate.C_memset_#t~loopctr499_103| |v_#Ultimate.C_memset_#ptr.offset_18|) (_ bv0 32)) (bvadd |v_#Ultimate.C_memset_#t~loopctr499_105| |v_#Ultimate.C_memset_#ptr.offset_18|) (_ bv0 32)) (bvadd |v_#Ultimate.C_memset_#t~loopctr499_104| |v_#Ultimate.C_memset_#ptr.offset_18|) (_ bv0 32))) |v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_2|) (bvadd (_ bv8 32) |v_ULTIMATE.start_main_~user~0#1.offset_BEFORE_CALL_2|)) |c_#Ultimate.C_memset_#ptr.base|))) (= |c_#Ultimate.C_memset_#ptr.base| (select (select (store |c_#memory_$Pointer$.base| |c_#Ultimate.C_memset_#ptr.base| (store (store (store (store (store (store (select |c_#memory_$Pointer$.base| |c_#Ultimate.C_memset_#ptr.base|) (bvadd |#Ultimate.C_memset_#ptr.offset| |#Ultimate.C_memset_#t~loopctr499|) (_ bv0 32)) (bvadd |v_#Ultimate.C_memset_#t~loopctr499_120| |#Ultimate.C_memset_#ptr.offset|) (_ bv0 32)) (bvadd |v_#Ultimate.C_memset_#t~loopctr499_118| |#Ultimate.C_memset_#ptr.offset|) (_ bv0 32)) (bvadd |v_#Ultimate.C_memset_#t~loopctr499_116| |#Ultimate.C_memset_#ptr.offset|) (_ bv0 32)) (bvadd |v_#Ultimate.C_memset_#t~loopctr499_114| |#Ultimate.C_memset_#ptr.offset|) (_ bv0 32)) (bvadd |v_#Ultimate.C_memset_#t~loopctr499_112| |#Ultimate.C_memset_#ptr.offset|) (_ bv0 32))) |v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_2|) (bvadd (_ bv8 32) |v_ULTIMATE.start_main_~user~0#1.offset_BEFORE_CALL_2|))))) is different from false [2021-11-20 23:01:02,977 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 21 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:01:02,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189168673] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:01:02,977 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-20 23:01:02,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 15, 15] total 45 [2021-11-20 23:01:02,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649056262] [2021-11-20 23:01:02,978 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-20 23:01:02,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-20 23:01:02,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:01:02,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-20 23:01:02,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1536, Unknown=190, NotChecked=84, Total=1980 [2021-11-20 23:01:02,980 INFO L87 Difference]: Start difference. First operand 3743 states and 5181 transitions. Second operand has 45 states, 43 states have (on average 5.511627906976744) internal successors, (237), 43 states have internal predecessors, (237), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-20 23:01:09,890 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_#Ultimate.C_memset_#t~loopctr499_118| (_ BitVec 32)) (|v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_2| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr499_116| (_ BitVec 32)) (|v_ULTIMATE.start_main_~user~0#1.offset_BEFORE_CALL_2| (_ BitVec 32)) (|#Ultimate.C_memset_#t~loopctr499| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr499_120| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr499_114| (_ BitVec 32)) (|#Ultimate.C_memset_#ptr.offset| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr499_112| (_ BitVec 32))) (or (exists ((|v_#Ultimate.C_memset_#t~loopctr499_108| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr499_107| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr499_105| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr499_109| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr499_104| (_ BitVec 32)) (|v_#Ultimate.C_memset_#ptr.offset_18| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr499_103| (_ BitVec 32))) (not (= (select (select (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| (store (store (store (store (store (store (select |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base|) (bvadd |v_#Ultimate.C_memset_#t~loopctr499_109| |v_#Ultimate.C_memset_#ptr.offset_18|) (_ bv0 32)) (bvadd |v_#Ultimate.C_memset_#t~loopctr499_108| |v_#Ultimate.C_memset_#ptr.offset_18|) (_ bv0 32)) (bvadd |v_#Ultimate.C_memset_#t~loopctr499_107| |v_#Ultimate.C_memset_#ptr.offset_18|) (_ bv0 32)) (bvadd |v_#Ultimate.C_memset_#t~loopctr499_103| |v_#Ultimate.C_memset_#ptr.offset_18|) (_ bv0 32)) (bvadd |v_#Ultimate.C_memset_#t~loopctr499_105| |v_#Ultimate.C_memset_#ptr.offset_18|) (_ bv0 32)) (bvadd |v_#Ultimate.C_memset_#t~loopctr499_104| |v_#Ultimate.C_memset_#ptr.offset_18|) (_ bv0 32))) |v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_2|) (bvadd (_ bv8 32) |v_ULTIMATE.start_main_~user~0#1.offset_BEFORE_CALL_2|)) |c_#Ultimate.C_memset_#ptr.base|))) (= |c_#Ultimate.C_memset_#ptr.base| (select (select (store |c_#memory_$Pointer$.base| |c_#Ultimate.C_memset_#ptr.base| (store (store (store (store (store (store (select |c_#memory_$Pointer$.base| |c_#Ultimate.C_memset_#ptr.base|) (bvadd |#Ultimate.C_memset_#ptr.offset| |#Ultimate.C_memset_#t~loopctr499|) (_ bv0 32)) (bvadd |v_#Ultimate.C_memset_#t~loopctr499_120| |#Ultimate.C_memset_#ptr.offset|) (_ bv0 32)) (bvadd |v_#Ultimate.C_memset_#t~loopctr499_118| |#Ultimate.C_memset_#ptr.offset|) (_ bv0 32)) (bvadd |v_#Ultimate.C_memset_#t~loopctr499_116| |#Ultimate.C_memset_#ptr.offset|) (_ bv0 32)) (bvadd |v_#Ultimate.C_memset_#t~loopctr499_114| |#Ultimate.C_memset_#ptr.offset|) (_ bv0 32)) (bvadd |v_#Ultimate.C_memset_#t~loopctr499_112| |#Ultimate.C_memset_#ptr.offset|) (_ bv0 32))) |v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_2|) (bvadd (_ bv8 32) |v_ULTIMATE.start_main_~user~0#1.offset_BEFORE_CALL_2|))))) (= |c_old(#memory_$Pointer$.base)| |c_#memory_$Pointer$.base|)) is different from false [2021-11-20 23:02:57,271 WARN L838 $PredicateComparison]: unable to prove that (and (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| |c_#Ultimate.C_memset_#ptr.base|)) (_ bv1 1))) (exists ((|v_#Ultimate.C_memset_#t~loopctr499_83| (_ BitVec 32))) (= (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| (store (select |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base|) (bvadd |v_#Ultimate.C_memset_#t~loopctr499_83| |c_#Ultimate.C_memset_#ptr.offset|) (_ bv0 32))) |c_#memory_$Pointer$.base|)) (forall ((|v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_2| (_ BitVec 32)) (|v_ULTIMATE.start_main_~user~0#1.offset_BEFORE_CALL_2| (_ BitVec 32)) (|#Ultimate.C_memset_#t~loopctr499| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr499_114| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr499_112| (_ BitVec 32))) (or (exists ((|v_#Ultimate.C_memset_#t~loopctr499_108| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr499_107| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr499_105| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr499_109| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr499_104| (_ BitVec 32)) (|v_#Ultimate.C_memset_#ptr.offset_18| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr499_103| (_ BitVec 32))) (not (= (select (select (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| (store (store (store (store (store (store (select |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base|) (bvadd |v_#Ultimate.C_memset_#t~loopctr499_109| |v_#Ultimate.C_memset_#ptr.offset_18|) (_ bv0 32)) (bvadd |v_#Ultimate.C_memset_#t~loopctr499_108| |v_#Ultimate.C_memset_#ptr.offset_18|) (_ bv0 32)) (bvadd |v_#Ultimate.C_memset_#t~loopctr499_107| |v_#Ultimate.C_memset_#ptr.offset_18|) (_ bv0 32)) (bvadd |v_#Ultimate.C_memset_#t~loopctr499_103| |v_#Ultimate.C_memset_#ptr.offset_18|) (_ bv0 32)) (bvadd |v_#Ultimate.C_memset_#t~loopctr499_105| |v_#Ultimate.C_memset_#ptr.offset_18|) (_ bv0 32)) (bvadd |v_#Ultimate.C_memset_#t~loopctr499_104| |v_#Ultimate.C_memset_#ptr.offset_18|) (_ bv0 32))) |v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_2|) (bvadd (_ bv8 32) |v_ULTIMATE.start_main_~user~0#1.offset_BEFORE_CALL_2|)) |c_#Ultimate.C_memset_#ptr.base|))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_#Ultimate.C_memset_#ptr.base| (store (store (store (select |c_#memory_$Pointer$.base| |c_#Ultimate.C_memset_#ptr.base|) (bvadd |c_#Ultimate.C_memset_#ptr.offset| |#Ultimate.C_memset_#t~loopctr499|) (_ bv0 32)) (bvadd |c_#Ultimate.C_memset_#ptr.offset| |v_#Ultimate.C_memset_#t~loopctr499_114|) (_ bv0 32)) (bvadd |c_#Ultimate.C_memset_#ptr.offset| |v_#Ultimate.C_memset_#t~loopctr499_112|) (_ bv0 32))) |v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_2|) (bvadd (_ bv8 32) |v_ULTIMATE.start_main_~user~0#1.offset_BEFORE_CALL_2|))))))))))) (_ bv1 1))))) (forall ((|v_#Ultimate.C_memset_#t~loopctr499_118| (_ BitVec 32)) (|v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_2| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr499_116| (_ BitVec 32)) (|v_ULTIMATE.start_main_~user~0#1.offset_BEFORE_CALL_2| (_ BitVec 32)) (|#Ultimate.C_memset_#t~loopctr499| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr499_114| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr499_112| (_ BitVec 32))) (or (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_#Ultimate.C_memset_#ptr.base| (store (store (store (store (store (select |c_#memory_$Pointer$.base| |c_#Ultimate.C_memset_#ptr.base|) (bvadd |c_#Ultimate.C_memset_#ptr.offset| |#Ultimate.C_memset_#t~loopctr499|) (_ bv0 32)) (bvadd |c_#Ultimate.C_memset_#ptr.offset| |v_#Ultimate.C_memset_#t~loopctr499_118|) (_ bv0 32)) (bvadd |c_#Ultimate.C_memset_#ptr.offset| |v_#Ultimate.C_memset_#t~loopctr499_116|) (_ bv0 32)) (bvadd |c_#Ultimate.C_memset_#ptr.offset| |v_#Ultimate.C_memset_#t~loopctr499_114|) (_ bv0 32)) (bvadd |c_#Ultimate.C_memset_#ptr.offset| |v_#Ultimate.C_memset_#t~loopctr499_112|) (_ bv0 32))) |v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_2|) (bvadd (_ bv8 32) |v_ULTIMATE.start_main_~user~0#1.offset_BEFORE_CALL_2|)))))))))))) (_ bv1 1))) (exists ((|v_#Ultimate.C_memset_#t~loopctr499_108| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr499_107| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr499_105| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr499_109| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr499_104| (_ BitVec 32)) (|v_#Ultimate.C_memset_#ptr.offset_18| (_ BitVec 32)) (|v_#Ultimate.C_memset_#t~loopctr499_103| (_ BitVec 32))) (not (= (select (select (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| (store (store (store (store (store (store (select |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base|) (bvadd |v_#Ultimate.C_memset_#t~loopctr499_109| |v_#Ultimate.C_memset_#ptr.offset_18|) (_ bv0 32)) (bvadd |v_#Ultimate.C_memset_#t~loopctr499_108| |v_#Ultimate.C_memset_#ptr.offset_18|) (_ bv0 32)) (bvadd |v_#Ultimate.C_memset_#t~loopctr499_107| |v_#Ultimate.C_memset_#ptr.offset_18|) (_ bv0 32)) (bvadd |v_#Ultimate.C_memset_#t~loopctr499_103| |v_#Ultimate.C_memset_#ptr.offset_18|) (_ bv0 32)) (bvadd |v_#Ultimate.C_memset_#t~loopctr499_105| |v_#Ultimate.C_memset_#ptr.offset_18|) (_ bv0 32)) (bvadd |v_#Ultimate.C_memset_#t~loopctr499_104| |v_#Ultimate.C_memset_#ptr.offset_18|) (_ bv0 32))) |v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_2|) (bvadd (_ bv8 32) |v_ULTIMATE.start_main_~user~0#1.offset_BEFORE_CALL_2|)) |c_#Ultimate.C_memset_#ptr.base|))))) (= (_ bv1 32) |c_#Ultimate.C_memset_#t~loopctr499|)) is different from false