./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test6-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test6-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash bd635b7902366e8a0b08b14a90a1f3949f04bf734a3e09a83f5077ced842f5da --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 05:17:15,278 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 05:17:15,280 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 05:17:15,331 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 05:17:15,332 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 05:17:15,337 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 05:17:15,339 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 05:17:15,342 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 05:17:15,346 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 05:17:15,353 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 05:17:15,354 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 05:17:15,355 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 05:17:15,356 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 05:17:15,358 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 05:17:15,360 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 05:17:15,366 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 05:17:15,367 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 05:17:15,368 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 05:17:15,370 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 05:17:15,376 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 05:17:15,378 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 05:17:15,380 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 05:17:15,384 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 05:17:15,385 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 05:17:15,390 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 05:17:15,391 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 05:17:15,391 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 05:17:15,393 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 05:17:15,394 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 05:17:15,395 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 05:17:15,396 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 05:17:15,397 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 05:17:15,399 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 05:17:15,400 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 05:17:15,401 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 05:17:15,401 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 05:17:15,402 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 05:17:15,402 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 05:17:15,403 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 05:17:15,403 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 05:17:15,404 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 05:17:15,405 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-03 05:17:15,451 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 05:17:15,451 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 05:17:15,452 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 05:17:15,453 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 05:17:15,453 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 05:17:15,459 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 05:17:15,459 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 05:17:15,459 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 05:17:15,460 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 05:17:15,460 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 05:17:15,461 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 05:17:15,461 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 05:17:15,461 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 05:17:15,462 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 05:17:15,462 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 05:17:15,462 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-03 05:17:15,463 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-03 05:17:15,463 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 05:17:15,463 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 05:17:15,463 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-03 05:17:15,464 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 05:17:15,464 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 05:17:15,464 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 05:17:15,464 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-03 05:17:15,465 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-03 05:17:15,465 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-03 05:17:15,465 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 05:17:15,465 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 05:17:15,466 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 05:17:15,466 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 05:17:15,466 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 05:17:15,466 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 05:17:15,467 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:17:15,467 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 05:17:15,467 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 05:17:15,467 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 05:17:15,468 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 05:17:15,468 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 05:17:15,468 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 05:17:15,468 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_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bd635b7902366e8a0b08b14a90a1f3949f04bf734a3e09a83f5077ced842f5da [2021-11-03 05:17:15,763 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 05:17:15,791 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 05:17:15,793 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 05:17:15,794 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 05:17:15,795 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 05:17:15,796 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test6-2.i [2021-11-03 05:17:15,867 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/data/03f0050bd/d4f43542d8244249b8c8a715af787a91/FLAGc7d6c8f93 [2021-11-03 05:17:16,438 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 05:17:16,439 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test6-2.i [2021-11-03 05:17:16,457 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/data/03f0050bd/d4f43542d8244249b8c8a715af787a91/FLAGc7d6c8f93 [2021-11-03 05:17:16,697 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/data/03f0050bd/d4f43542d8244249b8c8a715af787a91 [2021-11-03 05:17:16,701 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 05:17:16,703 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 05:17:16,706 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 05:17:16,706 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 05:17:16,710 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 05:17:16,711 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:17:16" (1/1) ... [2021-11-03 05:17:16,712 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@744ea9ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:17:16, skipping insertion in model container [2021-11-03 05:17:16,713 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:17:16" (1/1) ... [2021-11-03 05:17:16,724 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 05:17:16,778 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:17:17,299 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test6-2.i[44118,44131] [2021-11-03 05:17:17,309 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test6-2.i[44660,44673] [2021-11-03 05:17:17,422 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test6-2.i[56247,56260] [2021-11-03 05:17:17,423 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test6-2.i[56368,56381] [2021-11-03 05:17:17,443 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:17:17,453 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-03 05:17:17,454 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@280c7750 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:17:17, skipping insertion in model container [2021-11-03 05:17:17,454 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 05:17:17,455 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-03 05:17:17,457 INFO L168 Benchmark]: Toolchain (without parser) took 752.57 ms. Allocated memory is still 119.5 MB. Free memory was 76.1 MB in the beginning and 81.4 MB in the end (delta: -5.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-03 05:17:17,457 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 119.5 MB. Free memory is still 96.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 05:17:17,458 INFO L168 Benchmark]: CACSL2BoogieTranslator took 748.93 ms. Allocated memory is still 119.5 MB. Free memory was 76.0 MB in the beginning and 81.4 MB in the end (delta: -5.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-03 05:17:17,460 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 119.5 MB. Free memory is still 96.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 748.93 ms. Allocated memory is still 119.5 MB. Free memory was 76.0 MB in the beginning and 81.4 MB in the end (delta: -5.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 990]: 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_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test6-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash bd635b7902366e8a0b08b14a90a1f3949f04bf734a3e09a83f5077ced842f5da --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 05:17:19,589 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 05:17:19,591 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 05:17:19,655 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 05:17:19,655 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 05:17:19,660 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 05:17:19,662 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 05:17:19,666 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 05:17:19,669 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 05:17:19,680 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 05:17:19,681 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 05:17:19,682 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 05:17:19,682 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 05:17:19,683 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 05:17:19,685 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 05:17:19,686 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 05:17:19,687 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 05:17:19,687 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 05:17:19,689 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 05:17:19,692 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 05:17:19,693 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 05:17:19,695 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 05:17:19,696 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 05:17:19,697 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 05:17:19,700 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 05:17:19,701 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 05:17:19,701 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 05:17:19,702 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 05:17:19,702 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 05:17:19,704 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 05:17:19,704 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 05:17:19,705 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 05:17:19,706 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 05:17:19,706 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 05:17:19,708 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 05:17:19,708 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 05:17:19,709 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 05:17:19,709 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 05:17:19,709 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 05:17:19,711 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 05:17:19,711 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 05:17:19,712 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-03 05:17:19,743 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 05:17:19,745 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 05:17:19,747 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 05:17:19,747 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 05:17:19,747 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 05:17:19,748 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 05:17:19,748 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 05:17:19,748 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 05:17:19,748 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 05:17:19,749 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-03 05:17:19,750 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-03 05:17:19,751 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 05:17:19,751 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 05:17:19,751 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-03 05:17:19,751 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 05:17:19,752 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 05:17:19,752 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 05:17:19,752 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-03 05:17:19,752 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-03 05:17:19,752 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-03 05:17:19,753 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 05:17:19,753 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 05:17:19,753 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 05:17:19,753 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 05:17:19,754 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 05:17:19,754 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 05:17:19,754 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 05:17:19,754 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 05:17:19,754 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 05:17:19,755 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:17:19,755 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 05:17:19,755 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 05:17:19,756 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 05:17:19,756 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 05:17:19,756 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 05:17:19,756 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 05:17:19,756 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_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bd635b7902366e8a0b08b14a90a1f3949f04bf734a3e09a83f5077ced842f5da [2021-11-03 05:17:20,109 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 05:17:20,129 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 05:17:20,131 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 05:17:20,132 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 05:17:20,133 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 05:17:20,134 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test6-2.i [2021-11-03 05:17:20,199 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/data/8d1b31192/4a86c21aea4e41bfa454ff0701c4bffa/FLAG54aa937a2 [2021-11-03 05:17:20,824 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 05:17:20,825 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test6-2.i [2021-11-03 05:17:20,844 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/data/8d1b31192/4a86c21aea4e41bfa454ff0701c4bffa/FLAG54aa937a2 [2021-11-03 05:17:21,061 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/data/8d1b31192/4a86c21aea4e41bfa454ff0701c4bffa [2021-11-03 05:17:21,065 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 05:17:21,067 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 05:17:21,069 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 05:17:21,070 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 05:17:21,074 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 05:17:21,075 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:17:21" (1/1) ... [2021-11-03 05:17:21,076 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6580d03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:17:21, skipping insertion in model container [2021-11-03 05:17:21,077 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:17:21" (1/1) ... [2021-11-03 05:17:21,087 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 05:17:21,146 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:17:21,750 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test6-2.i[44118,44131] [2021-11-03 05:17:21,766 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test6-2.i[44660,44673] [2021-11-03 05:17:21,908 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test6-2.i[56247,56260] [2021-11-03 05:17:21,909 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test6-2.i[56368,56381] [2021-11-03 05:17:21,939 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:17:21,955 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-03 05:17:21,994 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:17:22,023 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test6-2.i[44118,44131] [2021-11-03 05:17:22,026 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test6-2.i[44660,44673] [2021-11-03 05:17:22,137 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test6-2.i[56247,56260] [2021-11-03 05:17:22,143 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test6-2.i[56368,56381] [2021-11-03 05:17:22,151 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:17:22,166 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 05:17:22,223 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test6-2.i[44118,44131] [2021-11-03 05:17:22,224 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test6-2.i[44660,44673] [2021-11-03 05:17:22,263 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test6-2.i[56247,56260] [2021-11-03 05:17:22,273 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test6-2.i[56368,56381] [2021-11-03 05:17:22,280 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:17:22,355 INFO L208 MainTranslator]: Completed translation [2021-11-03 05:17:22,355 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:17:22 WrapperNode [2021-11-03 05:17:22,356 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 05:17:22,357 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 05:17:22,357 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 05:17:22,357 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 05:17:22,364 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:17:22" (1/1) ... [2021-11-03 05:17:22,409 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:17:22" (1/1) ... [2021-11-03 05:17:22,484 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 05:17:22,485 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 05:17:22,485 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 05:17:22,485 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 05:17:22,493 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:17:22" (1/1) ... [2021-11-03 05:17:22,493 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:17:22" (1/1) ... [2021-11-03 05:17:22,525 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:17:22" (1/1) ... [2021-11-03 05:17:22,525 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:17:22" (1/1) ... [2021-11-03 05:17:22,595 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:17:22" (1/1) ... [2021-11-03 05:17:22,621 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:17:22" (1/1) ... [2021-11-03 05:17:22,637 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:17:22" (1/1) ... [2021-11-03 05:17:22,671 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 05:17:22,672 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 05:17:22,672 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 05:17:22,673 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 05:17:22,673 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:17:22" (1/1) ... [2021-11-03 05:17:22,679 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:17:22,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:17:22,701 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 05:17:22,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 05:17:22,742 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-03 05:17:22,742 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-03 05:17:22,742 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 05:17:22,742 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-03 05:17:22,742 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-03 05:17:22,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-03 05:17:22,743 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-03 05:17:22,743 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-03 05:17:22,743 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-03 05:17:22,743 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-03 05:17:22,743 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 05:17:22,743 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 05:17:28,552 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 05:17:28,552 INFO L299 CfgBuilder]: Removed 124 assume(true) statements. [2021-11-03 05:17:28,556 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:17:28 BoogieIcfgContainer [2021-11-03 05:17:28,556 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 05:17:28,558 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 05:17:28,558 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 05:17:28,561 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 05:17:28,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 05:17:21" (1/3) ... [2021-11-03 05:17:28,562 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e398a3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:17:28, skipping insertion in model container [2021-11-03 05:17:28,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:17:22" (2/3) ... [2021-11-03 05:17:28,563 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e398a3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:17:28, skipping insertion in model container [2021-11-03 05:17:28,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:17:28" (3/3) ... [2021-11-03 05:17:28,564 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_OAT_test6-2.i [2021-11-03 05:17:28,569 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 05:17:28,569 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 677 error locations. [2021-11-03 05:17:28,609 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 05:17:28,615 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-03 05:17:28,616 INFO L340 AbstractCegarLoop]: Starting to check reachability of 677 error locations. [2021-11-03 05:17:28,665 INFO L276 IsEmpty]: Start isEmpty. Operand has 1373 states, 695 states have (on average 2.20431654676259) internal successors, (1532), 1372 states have internal predecessors, (1532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:17:28,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-03 05:17:28,671 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:17:28,671 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-03 05:17:28,672 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 673 more)] === [2021-11-03 05:17:28,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:17:28,677 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2021-11-03 05:17:28,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:17:28,689 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1652914421] [2021-11-03 05:17:28,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:17:28,690 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:17:28,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:17:28,696 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:17:28,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 05:17:28,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:17:28,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:17:28,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:17:28,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 05:17:28,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:17:28,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:17:28,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:17:28,962 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:17:28,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1652914421] [2021-11-03 05:17:28,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1652914421] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:17:28,963 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:17:28,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 05:17:28,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967301444] [2021-11-03 05:17:28,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:17:28,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:17:28,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:17:28,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:17:28,989 INFO L87 Difference]: Start difference. First operand has 1373 states, 695 states have (on average 2.20431654676259) internal successors, (1532), 1372 states have internal predecessors, (1532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 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) [2021-11-03 05:17:31,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:17:31,825 INFO L93 Difference]: Finished difference Result 1547 states and 1625 transitions. [2021-11-03 05:17:31,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:17:31,826 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 [2021-11-03 05:17:31,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:17:31,854 INFO L225 Difference]: With dead ends: 1547 [2021-11-03 05:17:31,854 INFO L226 Difference]: Without dead ends: 1545 [2021-11-03 05:17:31,855 INFO L786 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 [2021-11-03 05:17:31,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1545 states. [2021-11-03 05:17:31,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1545 to 1345. [2021-11-03 05:17:31,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1345 states, 687 states have (on average 2.059679767103348) internal successors, (1415), 1344 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:17:31,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1345 states to 1345 states and 1415 transitions. [2021-11-03 05:17:31,959 INFO L78 Accepts]: Start accepts. Automaton has 1345 states and 1415 transitions. Word has length 3 [2021-11-03 05:17:31,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:17:31,959 INFO L470 AbstractCegarLoop]: Abstraction has 1345 states and 1415 transitions. [2021-11-03 05:17:31,960 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) [2021-11-03 05:17:31,960 INFO L276 IsEmpty]: Start isEmpty. Operand 1345 states and 1415 transitions. [2021-11-03 05:17:31,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-03 05:17:31,960 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:17:31,960 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-03 05:17:31,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-03 05:17:32,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:17:32,172 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 673 more)] === [2021-11-03 05:17:32,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:17:32,173 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2021-11-03 05:17:32,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:17:32,174 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1242841994] [2021-11-03 05:17:32,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:17:32,174 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:17:32,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:17:32,178 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:17:32,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 05:17:32,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:17:32,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:17:32,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:17:32,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 05:17:32,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:17:32,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:17:32,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:17:32,419 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:17:32,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1242841994] [2021-11-03 05:17:32,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1242841994] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:17:32,419 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:17:32,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-03 05:17:32,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724998337] [2021-11-03 05:17:32,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:17:32,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:17:32,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:17:32,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:17:32,422 INFO L87 Difference]: Start difference. First operand 1345 states and 1415 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) [2021-11-03 05:17:38,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:17:38,083 INFO L93 Difference]: Finished difference Result 2072 states and 2185 transitions. [2021-11-03 05:17:38,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:17:38,084 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 [2021-11-03 05:17:38,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:17:38,095 INFO L225 Difference]: With dead ends: 2072 [2021-11-03 05:17:38,095 INFO L226 Difference]: Without dead ends: 2072 [2021-11-03 05:17:38,096 INFO L786 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 [2021-11-03 05:17:38,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2072 states. [2021-11-03 05:17:38,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2072 to 1381. [2021-11-03 05:17:38,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1381 states, 732 states have (on average 2.0423497267759565) internal successors, (1495), 1380 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:17:38,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1381 states to 1381 states and 1495 transitions. [2021-11-03 05:17:38,157 INFO L78 Accepts]: Start accepts. Automaton has 1381 states and 1495 transitions. Word has length 3 [2021-11-03 05:17:38,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:17:38,158 INFO L470 AbstractCegarLoop]: Abstraction has 1381 states and 1495 transitions. [2021-11-03 05:17:38,158 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) [2021-11-03 05:17:38,158 INFO L276 IsEmpty]: Start isEmpty. Operand 1381 states and 1495 transitions. [2021-11-03 05:17:38,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-03 05:17:38,159 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:17:38,159 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:17:38,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-03 05:17:38,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:17:38,360 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 673 more)] === [2021-11-03 05:17:38,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:17:38,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1929648752, now seen corresponding path program 1 times [2021-11-03 05:17:38,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:17:38,362 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [702341147] [2021-11-03 05:17:38,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:17:38,362 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:17:38,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:17:38,363 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:17:38,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-03 05:17:38,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:17:38,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:17:38,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:17:38,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 05:17:38,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:17:38,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:17:38,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:17:38,640 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:17:38,640 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [702341147] [2021-11-03 05:17:38,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [702341147] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:17:38,641 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:17:38,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 05:17:38,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962080178] [2021-11-03 05:17:38,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:17:38,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:17:38,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:17:38,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:17:38,646 INFO L87 Difference]: Start difference. First operand 1381 states and 1495 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:17:42,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:17:42,152 INFO L93 Difference]: Finished difference Result 1940 states and 2089 transitions. [2021-11-03 05:17:42,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 05:17:42,153 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2021-11-03 05:17:42,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:17:42,163 INFO L225 Difference]: With dead ends: 1940 [2021-11-03 05:17:42,163 INFO L226 Difference]: Without dead ends: 1940 [2021-11-03 05:17:42,164 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:17:42,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1940 states. [2021-11-03 05:17:42,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1940 to 1333. [2021-11-03 05:17:42,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1333 states, 732 states have (on average 1.9726775956284153) internal successors, (1444), 1332 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:17:42,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1333 states to 1333 states and 1444 transitions. [2021-11-03 05:17:42,199 INFO L78 Accepts]: Start accepts. Automaton has 1333 states and 1444 transitions. Word has length 9 [2021-11-03 05:17:42,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:17:42,199 INFO L470 AbstractCegarLoop]: Abstraction has 1333 states and 1444 transitions. [2021-11-03 05:17:42,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:17:42,200 INFO L276 IsEmpty]: Start isEmpty. Operand 1333 states and 1444 transitions. [2021-11-03 05:17:42,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-03 05:17:42,200 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:17:42,200 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:17:42,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-03 05:17:42,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:17:42,417 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 673 more)] === [2021-11-03 05:17:42,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:17:42,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1929648753, now seen corresponding path program 1 times [2021-11-03 05:17:42,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:17:42,418 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1621759215] [2021-11-03 05:17:42,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:17:42,418 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:17:42,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:17:42,419 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:17:42,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-03 05:17:42,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:17:42,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:17:42,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:17:42,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 05:17:42,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:17:42,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:17:42,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:17:42,833 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:17:42,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1621759215] [2021-11-03 05:17:42,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1621759215] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:17:42,834 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:17:42,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-03 05:17:42,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697355189] [2021-11-03 05:17:42,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:17:42,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:17:42,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:17:42,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:17:42,835 INFO L87 Difference]: Start difference. First operand 1333 states and 1444 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:17:51,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:17:51,872 INFO L93 Difference]: Finished difference Result 2031 states and 2145 transitions. [2021-11-03 05:17:51,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 05:17:51,872 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 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 9 [2021-11-03 05:17:51,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:17:51,881 INFO L225 Difference]: With dead ends: 2031 [2021-11-03 05:17:51,882 INFO L226 Difference]: Without dead ends: 2031 [2021-11-03 05:17:51,882 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:17:51,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2031 states. [2021-11-03 05:17:51,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2031 to 1323. [2021-11-03 05:17:51,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1323 states, 732 states have (on average 1.9549180327868851) internal successors, (1431), 1322 states have internal predecessors, (1431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:17:51,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1323 states to 1323 states and 1431 transitions. [2021-11-03 05:17:51,915 INFO L78 Accepts]: Start accepts. Automaton has 1323 states and 1431 transitions. Word has length 9 [2021-11-03 05:17:51,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:17:51,916 INFO L470 AbstractCegarLoop]: Abstraction has 1323 states and 1431 transitions. [2021-11-03 05:17:51,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:17:51,916 INFO L276 IsEmpty]: Start isEmpty. Operand 1323 states and 1431 transitions. [2021-11-03 05:17:51,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-03 05:17:51,917 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:17:51,917 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:17:51,949 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-03 05:17:52,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:17:52,135 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr555ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 673 more)] === [2021-11-03 05:17:52,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:17:52,136 INFO L85 PathProgramCache]: Analyzing trace with hash -2075071052, now seen corresponding path program 1 times [2021-11-03 05:17:52,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:17:52,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1574126839] [2021-11-03 05:17:52,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:17:52,137 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:17:52,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:17:52,138 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:17:52,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-03 05:17:52,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:17:52,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:17:52,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:17:52,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:17:52,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:17:52,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:17:52,468 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:17:52,469 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1574126839] [2021-11-03 05:17:52,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1574126839] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:17:52,471 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:17:52,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 05:17:52,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426953804] [2021-11-03 05:17:52,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:17:52,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:17:52,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:17:52,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:17:52,473 INFO L87 Difference]: Start difference. First operand 1323 states and 1431 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:17:53,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:17:53,353 INFO L93 Difference]: Finished difference Result 2027 states and 2177 transitions. [2021-11-03 05:17:53,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 05:17:53,353 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-03 05:17:53,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:17:53,363 INFO L225 Difference]: With dead ends: 2027 [2021-11-03 05:17:53,363 INFO L226 Difference]: Without dead ends: 2027 [2021-11-03 05:17:53,364 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:17:53,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2027 states. [2021-11-03 05:17:53,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2027 to 1571. [2021-11-03 05:17:53,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1571 states, 980 states have (on average 1.9346938775510205) internal successors, (1896), 1570 states have internal predecessors, (1896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:17:53,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1571 states to 1571 states and 1896 transitions. [2021-11-03 05:17:53,399 INFO L78 Accepts]: Start accepts. Automaton has 1571 states and 1896 transitions. Word has length 11 [2021-11-03 05:17:53,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:17:53,399 INFO L470 AbstractCegarLoop]: Abstraction has 1571 states and 1896 transitions. [2021-11-03 05:17:53,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:17:53,400 INFO L276 IsEmpty]: Start isEmpty. Operand 1571 states and 1896 transitions. [2021-11-03 05:17:53,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-03 05:17:53,400 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:17:53,400 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:17:53,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-03 05:17:53,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:17:53,612 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr359REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 673 more)] === [2021-11-03 05:17:53,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:17:53,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1895000204, now seen corresponding path program 1 times [2021-11-03 05:17:53,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:17:53,613 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1856775435] [2021-11-03 05:17:53,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:17:53,613 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:17:53,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:17:53,614 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:17:53,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-03 05:17:53,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:17:53,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:17:53,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:17:53,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:17:53,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:17:53,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:17:53,863 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:17:53,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1856775435] [2021-11-03 05:17:53,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1856775435] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:17:53,864 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:17:53,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 05:17:53,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696044613] [2021-11-03 05:17:53,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:17:53,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:17:53,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:17:53,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:17:53,866 INFO L87 Difference]: Start difference. First operand 1571 states and 1896 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:17:53,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:17:53,902 INFO L93 Difference]: Finished difference Result 1775 states and 2089 transitions. [2021-11-03 05:17:53,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:17:53,903 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-03 05:17:53,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:17:53,911 INFO L225 Difference]: With dead ends: 1775 [2021-11-03 05:17:53,911 INFO L226 Difference]: Without dead ends: 1775 [2021-11-03 05:17:53,912 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:17:53,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1775 states. [2021-11-03 05:17:53,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1775 to 1511. [2021-11-03 05:17:53,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1511 states, 944 states have (on average 1.9173728813559323) internal successors, (1810), 1510 states have internal predecessors, (1810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:17:53,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1511 states to 1511 states and 1810 transitions. [2021-11-03 05:17:53,943 INFO L78 Accepts]: Start accepts. Automaton has 1511 states and 1810 transitions. Word has length 13 [2021-11-03 05:17:53,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:17:53,944 INFO L470 AbstractCegarLoop]: Abstraction has 1511 states and 1810 transitions. [2021-11-03 05:17:53,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:17:53,944 INFO L276 IsEmpty]: Start isEmpty. Operand 1511 states and 1810 transitions. [2021-11-03 05:17:53,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-03 05:17:53,945 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:17:53,945 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:17:53,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-03 05:17:54,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:17:54,157 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr558ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 673 more)] === [2021-11-03 05:17:54,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:17:54,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1278447871, now seen corresponding path program 1 times [2021-11-03 05:17:54,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:17:54,158 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1472877141] [2021-11-03 05:17:54,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:17:54,158 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:17:54,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:17:54,158 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:17:54,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-03 05:17:54,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:17:54,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:17:54,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:17:54,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:17:54,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:17:54,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:17:54,425 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-03 05:17:54,426 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 [2021-11-03 05:17:54,503 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-03 05:17:54,504 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 [2021-11-03 05:17:54,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:17:54,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:17:54,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:17:54,606 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:17:54,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1472877141] [2021-11-03 05:17:54,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1472877141] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:17:54,606 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:17:54,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 05:17:54,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114328657] [2021-11-03 05:17:54,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:17:54,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:17:54,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:17:54,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:17:54,608 INFO L87 Difference]: Start difference. First operand 1511 states and 1810 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:17:56,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:17:56,874 INFO L93 Difference]: Finished difference Result 2031 states and 2396 transitions. [2021-11-03 05:17:56,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:17:56,875 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-03 05:17:56,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:17:56,883 INFO L225 Difference]: With dead ends: 2031 [2021-11-03 05:17:56,884 INFO L226 Difference]: Without dead ends: 2031 [2021-11-03 05:17:56,884 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-03 05:17:56,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2031 states. [2021-11-03 05:17:56,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2031 to 1510. [2021-11-03 05:17:56,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1510 states, 943 states have (on average 1.91728525980912) internal successors, (1808), 1509 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:17:56,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1510 states to 1510 states and 1808 transitions. [2021-11-03 05:17:56,915 INFO L78 Accepts]: Start accepts. Automaton has 1510 states and 1808 transitions. Word has length 13 [2021-11-03 05:17:56,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:17:56,915 INFO L470 AbstractCegarLoop]: Abstraction has 1510 states and 1808 transitions. [2021-11-03 05:17:56,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:17:56,916 INFO L276 IsEmpty]: Start isEmpty. Operand 1510 states and 1808 transitions. [2021-11-03 05:17:56,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-03 05:17:56,917 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:17:56,917 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:17:56,944 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-03 05:17:57,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:17:57,132 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 673 more)] === [2021-11-03 05:17:57,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:17:57,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1153072931, now seen corresponding path program 1 times [2021-11-03 05:17:57,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:17:57,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1683786763] [2021-11-03 05:17:57,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:17:57,133 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:17:57,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:17:57,134 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:17:57,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-03 05:17:57,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:17:57,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:17:57,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:17:57,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:17:57,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:17:57,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:17:57,441 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:17:57,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1683786763] [2021-11-03 05:17:57,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1683786763] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:17:57,441 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:17:57,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 05:17:57,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334680550] [2021-11-03 05:17:57,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:17:57,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:17:57,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:17:57,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:17:57,443 INFO L87 Difference]: Start difference. First operand 1510 states and 1808 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:17:57,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:17:57,468 INFO L93 Difference]: Finished difference Result 1450 states and 1722 transitions. [2021-11-03 05:17:57,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:17:57,468 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 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 19 [2021-11-03 05:17:57,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:17:57,474 INFO L225 Difference]: With dead ends: 1450 [2021-11-03 05:17:57,474 INFO L226 Difference]: Without dead ends: 1450 [2021-11-03 05:17:57,474 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:17:57,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1450 states. [2021-11-03 05:17:57,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1450 to 1450. [2021-11-03 05:17:57,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1450 states, 907 states have (on average 1.898566703417861) internal successors, (1722), 1449 states have internal predecessors, (1722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:17:57,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1450 states to 1450 states and 1722 transitions. [2021-11-03 05:17:57,500 INFO L78 Accepts]: Start accepts. Automaton has 1450 states and 1722 transitions. Word has length 19 [2021-11-03 05:17:57,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:17:57,500 INFO L470 AbstractCegarLoop]: Abstraction has 1450 states and 1722 transitions. [2021-11-03 05:17:57,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:17:57,501 INFO L276 IsEmpty]: Start isEmpty. Operand 1450 states and 1722 transitions. [2021-11-03 05:17:57,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-03 05:17:57,501 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:17:57,502 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:17:57,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-03 05:17:57,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:17:57,714 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr38REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 673 more)] === [2021-11-03 05:17:57,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:17:57,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1529130, now seen corresponding path program 1 times [2021-11-03 05:17:57,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:17:57,715 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1881205111] [2021-11-03 05:17:57,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:17:57,715 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:17:57,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:17:57,716 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:17:57,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-03 05:17:57,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:17:57,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:17:57,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:17:57,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:17:57,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:17:58,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:17:58,046 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:17:58,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1881205111] [2021-11-03 05:17:58,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1881205111] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:17:58,047 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:17:58,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 05:17:58,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130457922] [2021-11-03 05:17:58,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:17:58,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:17:58,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:17:58,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:17:58,049 INFO L87 Difference]: Start difference. First operand 1450 states and 1722 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:17:58,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:17:58,133 INFO L93 Difference]: Finished difference Result 1422 states and 1666 transitions. [2021-11-03 05:17:58,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:17:58,135 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 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 21 [2021-11-03 05:17:58,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:17:58,142 INFO L225 Difference]: With dead ends: 1422 [2021-11-03 05:17:58,142 INFO L226 Difference]: Without dead ends: 1422 [2021-11-03 05:17:58,143 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:17:58,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1422 states. [2021-11-03 05:17:58,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1422 to 1420. [2021-11-03 05:17:58,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1420 states, 891 states have (on average 1.8675645342312008) internal successors, (1664), 1419 states have internal predecessors, (1664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:17:58,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1420 states to 1420 states and 1664 transitions. [2021-11-03 05:17:58,167 INFO L78 Accepts]: Start accepts. Automaton has 1420 states and 1664 transitions. Word has length 21 [2021-11-03 05:17:58,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:17:58,168 INFO L470 AbstractCegarLoop]: Abstraction has 1420 states and 1664 transitions. [2021-11-03 05:17:58,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:17:58,168 INFO L276 IsEmpty]: Start isEmpty. Operand 1420 states and 1664 transitions. [2021-11-03 05:17:58,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-03 05:17:58,170 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:17:58,170 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:17:58,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-03 05:17:58,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:17:58,382 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 673 more)] === [2021-11-03 05:17:58,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:17:58,382 INFO L85 PathProgramCache]: Analyzing trace with hash 270814884, now seen corresponding path program 1 times [2021-11-03 05:17:58,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:17:58,383 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [31998699] [2021-11-03 05:17:58,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:17:58,383 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:17:58,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:17:58,383 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:17:58,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-03 05:17:58,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:17:58,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 05:17:58,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:17:58,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 05:17:58,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:17:58,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:17:58,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:17:58,914 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:17:58,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [31998699] [2021-11-03 05:17:58,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [31998699] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:17:58,915 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:17:58,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 05:17:58,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359216831] [2021-11-03 05:17:58,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:17:58,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:17:58,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:17:58,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:17:58,917 INFO L87 Difference]: Start difference. First operand 1420 states and 1664 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:18:01,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:18:01,759 INFO L93 Difference]: Finished difference Result 2068 states and 2441 transitions. [2021-11-03 05:18:01,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 05:18:01,759 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 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 35 [2021-11-03 05:18:01,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:18:01,766 INFO L225 Difference]: With dead ends: 2068 [2021-11-03 05:18:01,767 INFO L226 Difference]: Without dead ends: 2068 [2021-11-03 05:18:01,767 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:18:01,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2068 states. [2021-11-03 05:18:01,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2068 to 1416. [2021-11-03 05:18:01,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1416 states, 891 states have (on average 1.8585858585858586) internal successors, (1656), 1415 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:18:01,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 1656 transitions. [2021-11-03 05:18:01,792 INFO L78 Accepts]: Start accepts. Automaton has 1416 states and 1656 transitions. Word has length 35 [2021-11-03 05:18:01,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:18:01,792 INFO L470 AbstractCegarLoop]: Abstraction has 1416 states and 1656 transitions. [2021-11-03 05:18:01,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:18:01,793 INFO L276 IsEmpty]: Start isEmpty. Operand 1416 states and 1656 transitions. [2021-11-03 05:18:01,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-03 05:18:01,794 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:18:01,794 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:18:01,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-03 05:18:02,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:18:02,006 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr53REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 673 more)] === [2021-11-03 05:18:02,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:18:02,006 INFO L85 PathProgramCache]: Analyzing trace with hash 270814885, now seen corresponding path program 1 times [2021-11-03 05:18:02,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:18:02,007 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [687497883] [2021-11-03 05:18:02,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:18:02,007 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:18:02,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:18:02,008 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:18:02,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-03 05:18:02,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:18:02,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-03 05:18:02,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:18:02,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 05:18:02,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:18:02,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:18:03,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:18:03,124 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:18:03,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [687497883] [2021-11-03 05:18:03,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [687497883] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:18:03,124 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:18:03,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-03 05:18:03,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094057697] [2021-11-03 05:18:03,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 05:18:03,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:18:03,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 05:18:03,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:18:03,126 INFO L87 Difference]: Start difference. First operand 1416 states and 1656 transitions. Second operand has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:18:11,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:18:11,956 INFO L93 Difference]: Finished difference Result 2238 states and 2613 transitions. [2021-11-03 05:18:11,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 05:18:11,956 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-03 05:18:11,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:18:11,966 INFO L225 Difference]: With dead ends: 2238 [2021-11-03 05:18:11,967 INFO L226 Difference]: Without dead ends: 2238 [2021-11-03 05:18:11,967 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-11-03 05:18:11,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2238 states. [2021-11-03 05:18:11,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2238 to 1412. [2021-11-03 05:18:11,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1412 states, 891 states have (on average 1.8496071829405163) internal successors, (1648), 1411 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:18:11,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 1648 transitions. [2021-11-03 05:18:11,994 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 1648 transitions. Word has length 35 [2021-11-03 05:18:11,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:18:11,994 INFO L470 AbstractCegarLoop]: Abstraction has 1412 states and 1648 transitions. [2021-11-03 05:18:11,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:18:11,995 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 1648 transitions. [2021-11-03 05:18:11,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-03 05:18:11,996 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:18:11,997 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:18:12,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-03 05:18:12,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:18:12,209 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr70REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 673 more)] === [2021-11-03 05:18:12,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:18:12,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1615578914, now seen corresponding path program 1 times [2021-11-03 05:18:12,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:18:12,210 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [567869133] [2021-11-03 05:18:12,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:18:12,210 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:18:12,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:18:12,213 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:18:12,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-03 05:18:12,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:18:12,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:18:12,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:18:12,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:18:12,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:18:12,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:18:12,816 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:18:12,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [567869133] [2021-11-03 05:18:12,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [567869133] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:18:12,816 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:18:12,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 05:18:12,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557639976] [2021-11-03 05:18:12,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:18:12,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:18:12,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:18:12,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:18:12,818 INFO L87 Difference]: Start difference. First operand 1412 states and 1648 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 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) [2021-11-03 05:18:12,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:18:12,877 INFO L93 Difference]: Finished difference Result 1400 states and 1628 transitions. [2021-11-03 05:18:12,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:18:12,878 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 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 53 [2021-11-03 05:18:12,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:18:12,884 INFO L225 Difference]: With dead ends: 1400 [2021-11-03 05:18:12,885 INFO L226 Difference]: Without dead ends: 1400 [2021-11-03 05:18:12,885 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:18:12,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1400 states. [2021-11-03 05:18:12,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1400 to 1400. [2021-11-03 05:18:12,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1400 states, 879 states have (on average 1.852104664391354) internal successors, (1628), 1399 states have internal predecessors, (1628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:18:12,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1400 states to 1400 states and 1628 transitions. [2021-11-03 05:18:12,907 INFO L78 Accepts]: Start accepts. Automaton has 1400 states and 1628 transitions. Word has length 53 [2021-11-03 05:18:12,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:18:12,910 INFO L470 AbstractCegarLoop]: Abstraction has 1400 states and 1628 transitions. [2021-11-03 05:18:12,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 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) [2021-11-03 05:18:12,910 INFO L276 IsEmpty]: Start isEmpty. Operand 1400 states and 1628 transitions. [2021-11-03 05:18:12,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-03 05:18:12,915 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:18:12,915 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:18:12,932 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-03 05:18:13,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:18:13,128 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr70REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 673 more)] === [2021-11-03 05:18:13,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:18:13,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1057136622, now seen corresponding path program 1 times [2021-11-03 05:18:13,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:18:13,130 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [280271403] [2021-11-03 05:18:13,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:18:13,130 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:18:13,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:18:13,131 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:18:13,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-03 05:18:13,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:18:13,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 05:18:13,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:18:13,662 INFO L354 Elim1Store]: treesize reduction 77, result has 29.4 percent of original size [2021-11-03 05:18:13,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 37 [2021-11-03 05:18:13,838 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-03 05:18:13,838 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 16 treesize of output 21 [2021-11-03 05:18:13,936 INFO L354 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2021-11-03 05:18:13,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 43 [2021-11-03 05:18:14,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:18:14,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:18:14,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:18:14,746 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:18:14,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [280271403] [2021-11-03 05:18:14,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [280271403] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:18:14,746 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:18:14,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-03 05:18:14,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366068868] [2021-11-03 05:18:14,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 05:18:14,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:18:14,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 05:18:14,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-03 05:18:14,748 INFO L87 Difference]: Start difference. First operand 1400 states and 1628 transitions. Second operand has 7 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:18:20,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:18:20,735 INFO L93 Difference]: Finished difference Result 3217 states and 3731 transitions. [2021-11-03 05:18:20,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:18:20,735 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-03 05:18:20,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:18:20,748 INFO L225 Difference]: With dead ends: 3217 [2021-11-03 05:18:20,748 INFO L226 Difference]: Without dead ends: 3217 [2021-11-03 05:18:20,749 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 112 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-03 05:18:20,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3217 states. [2021-11-03 05:18:20,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3217 to 1668. [2021-11-03 05:18:20,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1668 states, 1149 states have (on average 1.8120104438642297) internal successors, (2082), 1667 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:18:20,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1668 states to 1668 states and 2082 transitions. [2021-11-03 05:18:20,776 INFO L78 Accepts]: Start accepts. Automaton has 1668 states and 2082 transitions. Word has length 61 [2021-11-03 05:18:20,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:18:20,776 INFO L470 AbstractCegarLoop]: Abstraction has 1668 states and 2082 transitions. [2021-11-03 05:18:20,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:18:20,777 INFO L276 IsEmpty]: Start isEmpty. Operand 1668 states and 2082 transitions. [2021-11-03 05:18:20,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-03 05:18:20,778 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:18:20,778 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:18:20,793 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-03 05:18:20,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:18:20,993 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr71REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 673 more)] === [2021-11-03 05:18:20,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:18:20,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1057136623, now seen corresponding path program 1 times [2021-11-03 05:18:20,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:18:20,994 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [853978221] [2021-11-03 05:18:20,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:18:20,994 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:18:20,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:18:20,995 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:18:21,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-03 05:18:21,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:18:21,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-03 05:18:21,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:18:21,598 INFO L354 Elim1Store]: treesize reduction 77, result has 29.4 percent of original size [2021-11-03 05:18:21,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 49 [2021-11-03 05:18:21,640 INFO L354 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2021-11-03 05:18:21,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 63 [2021-11-03 05:18:21,835 INFO L354 Elim1Store]: treesize reduction -2, result has 108.0 percent of original size [2021-11-03 05:18:21,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 64 [2021-11-03 05:18:21,877 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-11-03 05:18:21,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 65 [2021-11-03 05:18:22,287 INFO L354 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2021-11-03 05:18:22,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 30 [2021-11-03 05:18:27,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:18:27,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:18:30,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:18:30,047 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:18:30,047 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [853978221] [2021-11-03 05:18:30,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [853978221] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:18:30,047 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:18:30,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 9 [2021-11-03 05:18:30,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912154756] [2021-11-03 05:18:30,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-03 05:18:30,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:18:30,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-03 05:18:30,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-03 05:18:30,049 INFO L87 Difference]: Start difference. First operand 1668 states and 2082 transitions. Second operand has 11 states, 10 states have (on average 12.2) internal successors, (122), 10 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:19:10,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:19:10,359 INFO L93 Difference]: Finished difference Result 1678 states and 2093 transitions. [2021-11-03 05:19:10,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 05:19:10,360 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 12.2) internal successors, (122), 10 states have internal predecessors, (122), 0 states have call successors, (0), 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 61 [2021-11-03 05:19:10,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:19:10,367 INFO L225 Difference]: With dead ends: 1678 [2021-11-03 05:19:10,368 INFO L226 Difference]: Without dead ends: 1678 [2021-11-03 05:19:10,368 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-11-03 05:19:10,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1678 states. [2021-11-03 05:19:10,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1678 to 1672. [2021-11-03 05:19:10,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1672 states, 1153 states have (on average 1.8091934084995664) internal successors, (2086), 1671 states have internal predecessors, (2086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:19:10,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1672 states to 1672 states and 2086 transitions. [2021-11-03 05:19:10,394 INFO L78 Accepts]: Start accepts. Automaton has 1672 states and 2086 transitions. Word has length 61 [2021-11-03 05:19:10,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:19:10,394 INFO L470 AbstractCegarLoop]: Abstraction has 1672 states and 2086 transitions. [2021-11-03 05:19:10,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 12.2) internal successors, (122), 10 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:19:10,395 INFO L276 IsEmpty]: Start isEmpty. Operand 1672 states and 2086 transitions. [2021-11-03 05:19:10,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-03 05:19:10,396 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:19:10,396 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:19:10,417 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-03 05:19:10,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:19:10,608 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr72ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 673 more)] === [2021-11-03 05:19:10,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:19:10,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1137699215, now seen corresponding path program 1 times [2021-11-03 05:19:10,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:19:10,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1359273519] [2021-11-03 05:19:10,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:19:10,610 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:19:10,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:19:10,610 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:19:10,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-03 05:19:11,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:19:11,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:19:11,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:19:11,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:19:11,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:19:11,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:19:11,458 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:19:11,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1359273519] [2021-11-03 05:19:11,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1359273519] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:19:11,459 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:19:11,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 05:19:11,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237797912] [2021-11-03 05:19:11,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:19:11,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:19:11,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:19:11,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:19:11,461 INFO L87 Difference]: Start difference. First operand 1672 states and 2086 transitions. Second operand has 5 states, 5 states have (on average 13.4) 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) [2021-11-03 05:19:11,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:19:11,872 INFO L93 Difference]: Finished difference Result 4334 states and 5506 transitions. [2021-11-03 05:19:11,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 05:19:11,873 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) 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 65 [2021-11-03 05:19:11,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:19:11,886 INFO L225 Difference]: With dead ends: 4334 [2021-11-03 05:19:11,887 INFO L226 Difference]: Without dead ends: 4334 [2021-11-03 05:19:11,887 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-03 05:19:11,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4334 states. [2021-11-03 05:19:11,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4334 to 1670. [2021-11-03 05:19:11,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1670 states, 1152 states have (on average 1.8090277777777777) internal successors, (2084), 1669 states have internal predecessors, (2084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:19:11,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1670 states to 1670 states and 2084 transitions. [2021-11-03 05:19:11,917 INFO L78 Accepts]: Start accepts. Automaton has 1670 states and 2084 transitions. Word has length 65 [2021-11-03 05:19:11,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:19:11,917 INFO L470 AbstractCegarLoop]: Abstraction has 1670 states and 2084 transitions. [2021-11-03 05:19:11,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) 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) [2021-11-03 05:19:11,917 INFO L276 IsEmpty]: Start isEmpty. Operand 1670 states and 2084 transitions. [2021-11-03 05:19:11,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-03 05:19:11,918 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:19:11,918 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:19:11,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-03 05:19:12,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:19:12,128 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr74REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 673 more)] === [2021-11-03 05:19:12,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:19:12,129 INFO L85 PathProgramCache]: Analyzing trace with hash -908630116, now seen corresponding path program 1 times [2021-11-03 05:19:12,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:19:12,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1015055807] [2021-11-03 05:19:12,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:19:12,130 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:19:12,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:19:12,130 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:19:12,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-03 05:19:12,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:19:12,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 05:19:12,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:19:13,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:19:13,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:19:13,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:19:13,525 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:19:13,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1015055807] [2021-11-03 05:19:13,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1015055807] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:19:13,525 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:19:13,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 05:19:13,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967438801] [2021-11-03 05:19:13,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:19:13,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:19:13,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:19:13,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:19:13,527 INFO L87 Difference]: Start difference. First operand 1670 states and 2084 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:19:13,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:19:13,733 INFO L93 Difference]: Finished difference Result 3990 states and 4925 transitions. [2021-11-03 05:19:13,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:19:13,733 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-03 05:19:13,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:19:13,741 INFO L225 Difference]: With dead ends: 3990 [2021-11-03 05:19:13,742 INFO L226 Difference]: Without dead ends: 3990 [2021-11-03 05:19:13,742 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:19:13,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3990 states. [2021-11-03 05:19:13,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3990 to 1926. [2021-11-03 05:19:13,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1926 states, 1408 states have (on average 1.8082386363636365) internal successors, (2546), 1925 states have internal predecessors, (2546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:19:13,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1926 states to 1926 states and 2546 transitions. [2021-11-03 05:19:13,781 INFO L78 Accepts]: Start accepts. Automaton has 1926 states and 2546 transitions. Word has length 66 [2021-11-03 05:19:13,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:19:13,782 INFO L470 AbstractCegarLoop]: Abstraction has 1926 states and 2546 transitions. [2021-11-03 05:19:13,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:19:13,782 INFO L276 IsEmpty]: Start isEmpty. Operand 1926 states and 2546 transitions. [2021-11-03 05:19:13,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-03 05:19:13,783 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:19:13,783 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:19:13,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-03 05:19:13,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:19:13,998 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr74REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 673 more)] === [2021-11-03 05:19:13,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:19:13,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1887851608, now seen corresponding path program 1 times [2021-11-03 05:19:13,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:19:13,998 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1652738757] [2021-11-03 05:19:13,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:19:13,999 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:19:13,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:19:13,999 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:19:14,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-03 05:19:14,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:19:14,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-03 05:19:14,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:19:14,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 05:19:14,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 05:19:16,207 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-03 05:19:16,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2021-11-03 05:19:16,229 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-03 05:19:16,229 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 21 treesize of output 21 [2021-11-03 05:19:16,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:19:16,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:19:21,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:19:21,181 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:19:21,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1652738757] [2021-11-03 05:19:21,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1652738757] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:19:21,181 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:19:21,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-03 05:19:21,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504140351] [2021-11-03 05:19:21,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 05:19:21,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:19:21,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 05:19:21,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:19:21,184 INFO L87 Difference]: Start difference. First operand 1926 states and 2546 transitions. Second operand has 8 states, 7 states have (on average 18.571428571428573) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:19:34,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:19:34,434 INFO L93 Difference]: Finished difference Result 2533 states and 3261 transitions. [2021-11-03 05:19:34,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 05:19:34,434 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 18.571428571428573) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 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 [2021-11-03 05:19:34,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:19:34,438 INFO L225 Difference]: With dead ends: 2533 [2021-11-03 05:19:34,438 INFO L226 Difference]: Without dead ends: 2533 [2021-11-03 05:19:34,439 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-03 05:19:34,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2533 states. [2021-11-03 05:19:34,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2533 to 1887. [2021-11-03 05:19:34,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1887 states, 1408 states have (on average 1.7620738636363635) internal successors, (2481), 1886 states have internal predecessors, (2481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:19:34,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1887 states to 1887 states and 2481 transitions. [2021-11-03 05:19:34,473 INFO L78 Accepts]: Start accepts. Automaton has 1887 states and 2481 transitions. Word has length 67 [2021-11-03 05:19:34,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:19:34,473 INFO L470 AbstractCegarLoop]: Abstraction has 1887 states and 2481 transitions. [2021-11-03 05:19:34,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 18.571428571428573) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:19:34,474 INFO L276 IsEmpty]: Start isEmpty. Operand 1887 states and 2481 transitions. [2021-11-03 05:19:34,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-03 05:19:34,475 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:19:34,475 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:19:34,510 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-11-03 05:19:34,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:19:34,710 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr79ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 673 more)] === [2021-11-03 05:19:34,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:19:34,710 INFO L85 PathProgramCache]: Analyzing trace with hash -322193671, now seen corresponding path program 1 times [2021-11-03 05:19:34,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:19:34,711 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1562972735] [2021-11-03 05:19:34,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:19:34,711 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:19:34,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:19:34,713 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:19:34,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-03 05:19:35,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:19:35,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-03 05:19:35,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:19:35,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 05:19:35,519 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 [2021-11-03 05:19:35,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-11-03 05:19:35,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:19:35,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:19:35,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:19:35,857 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:19:35,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1562972735] [2021-11-03 05:19:35,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1562972735] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:19:35,857 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:19:35,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 6 [2021-11-03 05:19:35,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778788296] [2021-11-03 05:19:35,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 05:19:35,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:19:35,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 05:19:35,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-03 05:19:35,859 INFO L87 Difference]: Start difference. First operand 1887 states and 2481 transitions. Second operand has 7 states, 6 states have (on average 12.166666666666666) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:19:48,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:19:48,360 INFO L93 Difference]: Finished difference Result 2487 states and 3044 transitions. [2021-11-03 05:19:48,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-03 05:19:48,360 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.166666666666666) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-03 05:19:48,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:19:48,365 INFO L225 Difference]: With dead ends: 2487 [2021-11-03 05:19:48,365 INFO L226 Difference]: Without dead ends: 2487 [2021-11-03 05:19:48,366 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 137 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-11-03 05:19:48,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2487 states. [2021-11-03 05:19:48,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2487 to 1886. [2021-11-03 05:19:48,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1886 states, 1408 states have (on average 1.7613636363636365) internal successors, (2480), 1885 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:19:48,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 2480 transitions. [2021-11-03 05:19:48,417 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 2480 transitions. Word has length 73 [2021-11-03 05:19:48,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:19:48,417 INFO L470 AbstractCegarLoop]: Abstraction has 1886 states and 2480 transitions. [2021-11-03 05:19:48,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.166666666666666) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:19:48,418 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 2480 transitions. [2021-11-03 05:19:48,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-03 05:19:48,419 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:19:48,419 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:19:48,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-03 05:19:48,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:19:48,634 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr80ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 673 more)] === [2021-11-03 05:19:48,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:19:48,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1398068850, now seen corresponding path program 1 times [2021-11-03 05:19:48,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:19:48,635 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1843912609] [2021-11-03 05:19:48,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:19:48,636 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:19:48,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:19:48,636 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:19:48,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-03 05:19:49,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:19:49,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-03 05:19:49,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:19:49,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 05:19:49,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-03 05:19:49,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-03 05:19:49,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-11-03 05:19:49,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-11-03 05:19:49,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:19:49,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:19:51,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:19:51,059 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:19:51,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1843912609] [2021-11-03 05:19:51,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1843912609] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:19:51,059 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:19:51,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 13 [2021-11-03 05:19:51,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754465955] [2021-11-03 05:19:51,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-03 05:19:51,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:19:51,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-03 05:19:51,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-11-03 05:19:51,061 INFO L87 Difference]: Start difference. First operand 1886 states and 2480 transitions. Second operand has 14 states, 13 states have (on average 6.846153846153846) internal successors, (89), 14 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:20:39,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:20:39,747 INFO L93 Difference]: Finished difference Result 4418 states and 5558 transitions. [2021-11-03 05:20:39,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-03 05:20:39,748 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 6.846153846153846) internal successors, (89), 14 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-03 05:20:39,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:20:39,758 INFO L225 Difference]: With dead ends: 4418 [2021-11-03 05:20:39,758 INFO L226 Difference]: Without dead ends: 4418 [2021-11-03 05:20:39,759 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=164, Invalid=486, Unknown=0, NotChecked=0, Total=650 [2021-11-03 05:20:39,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4418 states. [2021-11-03 05:20:39,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4418 to 1885. [2021-11-03 05:20:39,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1885 states, 1408 states have (on average 1.7606534090909092) internal successors, (2479), 1884 states have internal predecessors, (2479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:20:39,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1885 states to 1885 states and 2479 transitions. [2021-11-03 05:20:39,807 INFO L78 Accepts]: Start accepts. Automaton has 1885 states and 2479 transitions. Word has length 74 [2021-11-03 05:20:39,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:20:39,808 INFO L470 AbstractCegarLoop]: Abstraction has 1885 states and 2479 transitions. [2021-11-03 05:20:39,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 6.846153846153846) internal successors, (89), 14 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:20:39,808 INFO L276 IsEmpty]: Start isEmpty. Operand 1885 states and 2479 transitions. [2021-11-03 05:20:39,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-03 05:20:39,809 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:20:39,809 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:20:39,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-03 05:20:40,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:20:40,025 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr83REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 673 more)] === [2021-11-03 05:20:40,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:20:40,026 INFO L85 PathProgramCache]: Analyzing trace with hash -2080731706, now seen corresponding path program 1 times [2021-11-03 05:20:40,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:20:40,026 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1628357584] [2021-11-03 05:20:40,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:20:40,027 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:20:40,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:20:40,028 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:20:40,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-03 05:20:40,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:20:40,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:20:40,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:20:41,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:20:41,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:20:41,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:20:41,383 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:20:41,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1628357584] [2021-11-03 05:20:41,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1628357584] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:20:41,384 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:20:41,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 05:20:41,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280170827] [2021-11-03 05:20:41,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:20:41,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:20:41,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:20:41,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:20:41,386 INFO L87 Difference]: Start difference. First operand 1885 states and 2479 transitions. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:20:41,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:20:41,663 INFO L93 Difference]: Finished difference Result 2749 states and 3464 transitions. [2021-11-03 05:20:41,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 05:20:41,663 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-03 05:20:41,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:20:41,691 INFO L225 Difference]: With dead ends: 2749 [2021-11-03 05:20:41,691 INFO L226 Difference]: Without dead ends: 2749 [2021-11-03 05:20:41,692 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:20:41,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2749 states. [2021-11-03 05:20:41,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2749 to 1888. [2021-11-03 05:20:41,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1888 states, 1411 states have (on average 1.7590361445783131) internal successors, (2482), 1887 states have internal predecessors, (2482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:20:41,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1888 states to 1888 states and 2482 transitions. [2021-11-03 05:20:41,709 INFO L78 Accepts]: Start accepts. Automaton has 1888 states and 2482 transitions. Word has length 79 [2021-11-03 05:20:41,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:20:41,709 INFO L470 AbstractCegarLoop]: Abstraction has 1888 states and 2482 transitions. [2021-11-03 05:20:41,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:20:41,709 INFO L276 IsEmpty]: Start isEmpty. Operand 1888 states and 2482 transitions. [2021-11-03 05:20:41,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-03 05:20:41,710 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:20:41,710 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:20:41,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-03 05:20:41,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:20:41,920 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr83REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 673 more)] === [2021-11-03 05:20:41,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:20:41,921 INFO L85 PathProgramCache]: Analyzing trace with hash -21710874, now seen corresponding path program 1 times [2021-11-03 05:20:41,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:20:41,921 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [202374760] [2021-11-03 05:20:41,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:20:41,921 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:20:41,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:20:41,922 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:20:41,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-03 05:20:42,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:20:42,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:20:42,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:20:43,043 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:20:43,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:20:43,318 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:20:43,318 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:20:43,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [202374760] [2021-11-03 05:20:43,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [202374760] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:20:43,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1879785232] [2021-11-03 05:20:43,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:20:43,319 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:20:43,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:20:43,320 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:20:43,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-03 05:20:44,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:20:44,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:20:44,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:20:44,606 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:20:44,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:20:44,778 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:20:44,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1879785232] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:20:44,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392438020] [2021-11-03 05:20:44,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:20:44,779 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:20:44,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:20:44,785 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:20:44,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-03 05:20:45,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:20:45,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:20:45,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:20:45,976 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:20:45,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:20:46,152 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:20:46,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392438020] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:20:46,152 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 05:20:46,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 10 [2021-11-03 05:20:46,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578354640] [2021-11-03 05:20:46,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 05:20:46,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:20:46,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 05:20:46,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-03 05:20:46,154 INFO L87 Difference]: Start difference. First operand 1888 states and 2482 transitions. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:20:46,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:20:46,930 INFO L93 Difference]: Finished difference Result 2755 states and 3470 transitions. [2021-11-03 05:20:46,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 05:20:46,931 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 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 81 [2021-11-03 05:20:46,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:20:46,935 INFO L225 Difference]: With dead ends: 2755 [2021-11-03 05:20:46,936 INFO L226 Difference]: Without dead ends: 2755 [2021-11-03 05:20:46,936 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 472 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2021-11-03 05:20:46,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2755 states. [2021-11-03 05:20:46,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2755 to 1894. [2021-11-03 05:20:46,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1894 states, 1417 states have (on average 1.7558221594918844) internal successors, (2488), 1893 states have internal predecessors, (2488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:20:46,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1894 states to 1894 states and 2488 transitions. [2021-11-03 05:20:46,971 INFO L78 Accepts]: Start accepts. Automaton has 1894 states and 2488 transitions. Word has length 81 [2021-11-03 05:20:46,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:20:46,971 INFO L470 AbstractCegarLoop]: Abstraction has 1894 states and 2488 transitions. [2021-11-03 05:20:46,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:20:46,972 INFO L276 IsEmpty]: Start isEmpty. Operand 1894 states and 2488 transitions. [2021-11-03 05:20:46,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-03 05:20:46,973 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:20:46,973 INFO L513 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:20:47,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-03 05:20:47,207 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (23)] Ended with exit code 0 [2021-11-03 05:20:47,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-03 05:20:47,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:20:47,601 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr83REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 673 more)] === [2021-11-03 05:20:47,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:20:47,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1830489050, now seen corresponding path program 2 times [2021-11-03 05:20:47,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:20:47,602 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [899866579] [2021-11-03 05:20:47,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 05:20:47,602 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:20:47,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:20:47,603 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:20:47,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-03 05:20:48,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 05:20:48,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 05:20:48,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-03 05:20:48,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:20:49,334 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:20:49,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:20:50,119 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:20:50,119 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:20:50,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [899866579] [2021-11-03 05:20:50,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [899866579] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:20:50,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1175012462] [2021-11-03 05:20:50,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 05:20:50,120 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:20:50,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:20:50,121 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:20:50,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-03 05:20:51,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 05:20:51,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 05:20:51,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-03 05:20:51,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:20:52,394 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:20:52,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:20:52,673 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:20:52,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1175012462] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:20:52,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786166594] [2021-11-03 05:20:52,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 05:20:52,674 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:20:52,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:20:52,675 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:20:52,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-03 05:21:46,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 05:21:46,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 05:21:46,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-03 05:21:46,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:21:47,301 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-03 05:21:47,302 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 18 treesize of output 18 [2021-11-03 05:21:47,505 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 18 treesize of output 14 [2021-11-03 05:21:48,229 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-03 05:21:48,229 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 26 [2021-11-03 05:21:48,516 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-03 05:21:48,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 38 [2021-11-03 05:21:52,433 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-03 05:21:52,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 38 [2021-11-03 05:21:52,752 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-03 05:21:52,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 38 [2021-11-03 05:21:56,267 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-03 05:21:56,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 38 [2021-11-03 05:21:56,572 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-03 05:21:56,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 48 [2021-11-03 05:21:59,096 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-03 05:21:59,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 27 [2021-11-03 05:21:59,233 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-03 05:21:59,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:22:41,448 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr318_66| (_ BitVec 32)) (|v_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr318_68| (_ BitVec 32)) (|ULTIMATE.start_#Ultimate.C_memset_#t~loopctr318| (_ BitVec 32))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.base| (store (store (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.base|) (bvadd |ULTIMATE.start_#Ultimate.C_memset_#t~loopctr318| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|) (_ bv0 32)) (bvadd |v_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr318_68| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|) (_ bv0 32)) (bvadd |v_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr318_66| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|) (_ bv0 32))) c_ULTIMATE.start_main_~user~0.base) (bvadd (_ bv8 32) c_ULTIMATE.start_main_~user~0.offset))))))))))) (_ bv1 1)))) is different from false [2021-11-03 05:23:33,982 INFO L354 Elim1Store]: treesize reduction 5, result has 89.8 percent of original size [2021-11-03 05:23:33,982 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 69 treesize of output 68 [2021-11-03 05:24:03,861 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 10 times theorem prover too weak. 0 trivial. 6 not checked. [2021-11-03 05:24:03,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786166594] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:24:03,861 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 05:24:03,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 11, 15] total 41 [2021-11-03 05:24:03,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440319744] [2021-11-03 05:24:03,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-03 05:24:03,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:24:03,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-03 05:24:03,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1325, Unknown=53, NotChecked=76, Total=1640 [2021-11-03 05:24:03,864 INFO L87 Difference]: Start difference. First operand 1894 states and 2488 transitions. Second operand has 41 states, 41 states have (on average 5.975609756097561) internal successors, (245), 41 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:24:26,669 WARN L207 SmtUtils]: Spent 6.50 s on a formula simplification. DAG size of input: 82 DAG size of output: 62 [2021-11-03 05:24:38,111 WARN L207 SmtUtils]: Spent 8.34 s on a formula simplification. DAG size of input: 82 DAG size of output: 71 [2021-11-03 05:24:55,310 WARN L207 SmtUtils]: Spent 6.56 s on a formula simplification. DAG size of input: 99 DAG size of output: 64 [2021-11-03 05:25:14,141 WARN L207 SmtUtils]: Spent 6.57 s on a formula simplification. DAG size of input: 96 DAG size of output: 64 [2021-11-03 05:25:55,779 WARN L207 SmtUtils]: Spent 8.41 s on a formula simplification. DAG size of input: 90 DAG size of output: 73 [2021-11-03 05:26:20,659 WARN L207 SmtUtils]: Spent 8.44 s on a formula simplification. DAG size of input: 87 DAG size of output: 73 [2021-11-03 05:26:43,595 WARN L207 SmtUtils]: Spent 6.59 s on a formula simplification. DAG size of input: 84 DAG size of output: 64 [2021-11-03 05:30:30,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:30:30,648 INFO L93 Difference]: Finished difference Result 4972 states and 6243 transitions. [2021-11-03 05:30:30,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-11-03 05:30:30,649 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 5.975609756097561) internal successors, (245), 41 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-03 05:30:30,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:30:30,656 INFO L225 Difference]: With dead ends: 4972 [2021-11-03 05:30:30,656 INFO L226 Difference]: Without dead ends: 4972 [2021-11-03 05:30:30,660 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 554 GetRequests, 463 SyntacticMatches, 5 SemanticMatches, 86 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2117 ImplicationChecksByTransitivity, 395.1s TimeCoverageRelationStatistics Valid=1423, Invalid=5922, Unknown=141, NotChecked=170, Total=7656 [2021-11-03 05:30:30,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4972 states. [2021-11-03 05:30:30,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4972 to 1905. [2021-11-03 05:30:30,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1905 states, 1429 states have (on average 1.748775367389783) internal successors, (2499), 1904 states have internal predecessors, (2499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:30:30,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1905 states to 1905 states and 2499 transitions. [2021-11-03 05:30:30,718 INFO L78 Accepts]: Start accepts. Automaton has 1905 states and 2499 transitions. Word has length 85 [2021-11-03 05:30:30,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:30:30,719 INFO L470 AbstractCegarLoop]: Abstraction has 1905 states and 2499 transitions. [2021-11-03 05:30:30,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 5.975609756097561) internal successors, (245), 41 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:30:30,719 INFO L276 IsEmpty]: Start isEmpty. Operand 1905 states and 2499 transitions. [2021-11-03 05:30:30,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-03 05:30:30,720 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:30:30,720 INFO L513 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:30:30,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2021-11-03 05:30:30,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-03 05:30:31,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-03 05:30:31,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:30:31,328 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr84REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 673 more)] === [2021-11-03 05:30:31,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:30:31,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1600982183, now seen corresponding path program 1 times [2021-11-03 05:30:31,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:30:31,329 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2043271227] [2021-11-03 05:30:31,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:30:31,330 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:30:31,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:30:31,330 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:30:31,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-03 05:30:32,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:30:32,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-03 05:30:32,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:30:33,777 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:30:33,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:30:36,236 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:30:36,237 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:30:36,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2043271227] [2021-11-03 05:30:36,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2043271227] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:30:36,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [364743459] [2021-11-03 05:30:36,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:30:36,238 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:30:36,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:30:36,238 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:30:36,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-03 05:30:37,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:30:37,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-03 05:30:37,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:30:38,119 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:30:38,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:30:38,414 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:30:38,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [364743459] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:30:38,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469321300] [2021-11-03 05:30:38,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:30:38,415 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:30:38,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:30:38,416 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:30:38,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-03 05:30:39,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:30:39,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-03 05:30:39,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:30:40,187 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:30:40,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:30:40,473 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:30:40,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469321300] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:30:40,473 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 05:30:40,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18, 18, 18, 18] total 34 [2021-11-03 05:30:40,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929886976] [2021-11-03 05:30:40,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-03 05:30:40,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:30:40,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-03 05:30:40,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=801, Unknown=0, NotChecked=0, Total=1122 [2021-11-03 05:30:40,476 INFO L87 Difference]: Start difference. First operand 1905 states and 2499 transitions. Second operand has 34 states, 34 states have (on average 3.264705882352941) internal successors, (111), 34 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:30:59,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:30:59,986 INFO L93 Difference]: Finished difference Result 2790 states and 3505 transitions. [2021-11-03 05:30:59,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-03 05:30:59,987 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.264705882352941) internal successors, (111), 34 states have internal predecessors, (111), 0 states have call successors, (0), 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 93 [2021-11-03 05:30:59,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:30:59,990 INFO L225 Difference]: With dead ends: 2790 [2021-11-03 05:30:59,991 INFO L226 Difference]: Without dead ends: 2790 [2021-11-03 05:30:59,992 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 582 GetRequests, 520 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 915 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=1446, Invalid=2586, Unknown=0, NotChecked=0, Total=4032 [2021-11-03 05:30:59,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2790 states. [2021-11-03 05:31:00,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2790 to 1929. [2021-11-03 05:31:00,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1929 states, 1453 states have (on average 1.7364074328974535) internal successors, (2523), 1928 states have internal predecessors, (2523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:31:00,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1929 states to 1929 states and 2523 transitions. [2021-11-03 05:31:00,022 INFO L78 Accepts]: Start accepts. Automaton has 1929 states and 2523 transitions. Word has length 93 [2021-11-03 05:31:00,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:31:00,023 INFO L470 AbstractCegarLoop]: Abstraction has 1929 states and 2523 transitions. [2021-11-03 05:31:00,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.264705882352941) internal successors, (111), 34 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:31:00,024 INFO L276 IsEmpty]: Start isEmpty. Operand 1929 states and 2523 transitions. [2021-11-03 05:31:00,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-03 05:31:00,025 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:31:00,026 INFO L513 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:31:00,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-03 05:31:00,254 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2021-11-03 05:31:00,461 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (28)] Ended with exit code 0 [2021-11-03 05:31:00,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:31:00,644 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr84REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 673 more)] === [2021-11-03 05:31:00,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:31:00,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1361330777, now seen corresponding path program 2 times [2021-11-03 05:31:00,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:31:00,646 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [324747089] [2021-11-03 05:31:00,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 05:31:00,646 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:31:00,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:31:00,647 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:31:00,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b786dd60-cecb-4ed2-9449-da8b7abf4771/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-03 05:31:02,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 05:31:02,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 05:31:02,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-03 05:31:02,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:31:06,069 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:31:06,070 INFO L328 TraceCheckSpWp]: Computing backward predicates...