./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test10-2.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_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/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_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test10-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/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_bb051639-116f-46a5-bf8d-010292a418c3/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 e2d96ac7da90505ebe789a14ca36a5b916234d7d0d8ab11cf581076a8deb0195 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:56:20,523 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:56:20,526 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:56:20,580 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:56:20,581 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:56:20,584 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:56:20,587 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:56:20,590 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:56:20,592 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:56:20,598 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:56:20,599 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:56:20,601 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:56:20,601 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:56:20,603 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:56:20,605 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:56:20,612 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:56:20,614 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:56:20,615 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:56:20,617 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:56:20,624 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:56:20,626 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:56:20,627 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:56:20,630 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:56:20,630 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:56:20,639 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:56:20,639 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:56:20,640 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:56:20,642 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:56:20,642 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:56:20,644 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:56:20,644 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:56:20,645 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:56:20,646 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:56:20,648 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:56:20,649 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:56:20,649 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:56:20,650 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:56:20,650 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:56:20,650 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:56:20,651 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:56:20,652 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:56:20,653 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-03 04:56:20,693 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:56:20,694 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:56:20,695 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:56:20,702 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:56:20,702 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:56:20,702 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:56:20,702 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 04:56:20,703 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:56:20,703 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:56:20,703 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 04:56:20,704 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 04:56:20,704 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:56:20,704 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 04:56:20,705 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 04:56:20,705 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 04:56:20,706 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-03 04:56:20,706 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-03 04:56:20,706 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:56:20,706 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:56:20,706 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-03 04:56:20,707 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 04:56:20,707 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:56:20,707 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:56:20,707 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-03 04:56:20,708 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-03 04:56:20,708 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-03 04:56:20,709 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:56:20,709 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:56:20,710 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:56:20,710 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:56:20,710 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:56:20,710 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:56:20,711 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:56:20,711 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:56:20,711 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:56:20,711 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 04:56:20,712 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 04:56:20,712 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:56:20,712 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:56:20,712 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_bb051639-116f-46a5-bf8d-010292a418c3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e2d96ac7da90505ebe789a14ca36a5b916234d7d0d8ab11cf581076a8deb0195 [2021-11-03 04:56:20,942 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:56:20,962 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:56:20,964 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:56:20,965 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:56:20,966 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:56:20,967 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test10-2.i [2021-11-03 04:56:21,031 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/data/6b8caff78/f42b35f0990747be9930937c6a78a276/FLAG2ae1cb703 [2021-11-03 04:56:21,685 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:56:21,686 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test10-2.i [2021-11-03 04:56:21,710 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/data/6b8caff78/f42b35f0990747be9930937c6a78a276/FLAG2ae1cb703 [2021-11-03 04:56:21,927 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/data/6b8caff78/f42b35f0990747be9930937c6a78a276 [2021-11-03 04:56:21,931 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:56:21,934 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:56:21,945 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:56:21,946 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:56:21,949 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:56:21,949 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:56:21" (1/1) ... [2021-11-03 04:56:21,951 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77cdbf9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:56:21, skipping insertion in model container [2021-11-03 04:56:21,951 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:56:21" (1/1) ... [2021-11-03 04:56:21,957 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:56:22,032 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:56:22,449 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_bb051639-116f-46a5-bf8d-010292a418c3/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test10-2.i[33022,33035] [2021-11-03 04:56:22,719 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:56:22,728 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 04:56:22,729 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5d2a9b12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:56:22, skipping insertion in model container [2021-11-03 04:56:22,729 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:56:22,730 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-03 04:56:22,732 INFO L168 Benchmark]: Toolchain (without parser) took 797.00 ms. Allocated memory was 98.6 MB in the beginning and 136.3 MB in the end (delta: 37.7 MB). Free memory was 66.2 MB in the beginning and 92.5 MB in the end (delta: -26.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-03 04:56:22,733 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 98.6 MB. Free memory is still 54.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 04:56:22,734 INFO L168 Benchmark]: CACSL2BoogieTranslator took 784.23 ms. Allocated memory was 98.6 MB in the beginning and 136.3 MB in the end (delta: 37.7 MB). Free memory was 66.2 MB in the beginning and 92.5 MB in the end (delta: -26.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-03 04:56:22,736 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 98.6 MB. Free memory is still 54.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 784.23 ms. Allocated memory was 98.6 MB in the beginning and 136.3 MB in the end (delta: 37.7 MB). Free memory was 66.2 MB in the beginning and 92.5 MB in the end (delta: -26.3 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: 734]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/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_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test10-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/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_bb051639-116f-46a5-bf8d-010292a418c3/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 e2d96ac7da90505ebe789a14ca36a5b916234d7d0d8ab11cf581076a8deb0195 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:56:24,920 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:56:24,922 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:56:24,971 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:56:24,971 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:56:24,975 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:56:24,977 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:56:24,984 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:56:24,987 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:56:24,994 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:56:24,996 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:56:24,997 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:56:24,998 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:56:25,000 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:56:25,002 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:56:25,006 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:56:25,007 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:56:25,015 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:56:25,017 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:56:25,024 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:56:25,026 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:56:25,027 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:56:25,029 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:56:25,031 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:56:25,039 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:56:25,039 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:56:25,040 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:56:25,041 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:56:25,042 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:56:25,042 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:56:25,043 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:56:25,043 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:56:25,044 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:56:25,045 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:56:25,045 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:56:25,046 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:56:25,046 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:56:25,046 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:56:25,046 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:56:25,047 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:56:25,048 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:56:25,049 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-03 04:56:25,093 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:56:25,093 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:56:25,095 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:56:25,095 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:56:25,095 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:56:25,095 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:56:25,095 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:56:25,096 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:56:25,096 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:56:25,097 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-03 04:56:25,098 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-03 04:56:25,098 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:56:25,099 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:56:25,099 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-03 04:56:25,099 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 04:56:25,099 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:56:25,099 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:56:25,100 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-03 04:56:25,100 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-03 04:56:25,100 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-03 04:56:25,100 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:56:25,101 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:56:25,101 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 04:56:25,101 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 04:56:25,101 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:56:25,101 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:56:25,102 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:56:25,102 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 04:56:25,102 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:56:25,102 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:56:25,103 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:56:25,103 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:56:25,103 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 04:56:25,104 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 04:56:25,104 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:56:25,104 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:56:25,104 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_bb051639-116f-46a5-bf8d-010292a418c3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e2d96ac7da90505ebe789a14ca36a5b916234d7d0d8ab11cf581076a8deb0195 [2021-11-03 04:56:25,443 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:56:25,466 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:56:25,469 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:56:25,469 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:56:25,470 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:56:25,471 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test10-2.i [2021-11-03 04:56:25,538 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/data/7d757a390/7b1378e815c14e0b9c9ec46dc0dae845/FLAG05fbb9c2d [2021-11-03 04:56:26,292 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:56:26,292 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test10-2.i [2021-11-03 04:56:26,319 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/data/7d757a390/7b1378e815c14e0b9c9ec46dc0dae845/FLAG05fbb9c2d [2021-11-03 04:56:26,548 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/data/7d757a390/7b1378e815c14e0b9c9ec46dc0dae845 [2021-11-03 04:56:26,553 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:56:26,554 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:56:26,558 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:56:26,558 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:56:26,561 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:56:26,562 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:56:26" (1/1) ... [2021-11-03 04:56:26,563 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26c58d84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:56:26, skipping insertion in model container [2021-11-03 04:56:26,563 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:56:26" (1/1) ... [2021-11-03 04:56:26,571 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:56:26,637 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:56:27,066 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_bb051639-116f-46a5-bf8d-010292a418c3/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test10-2.i[33022,33035] [2021-11-03 04:56:27,418 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:56:27,436 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-03 04:56:27,466 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:56:27,507 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_bb051639-116f-46a5-bf8d-010292a418c3/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test10-2.i[33022,33035] [2021-11-03 04:56:27,679 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:56:27,684 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 04:56:27,709 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_bb051639-116f-46a5-bf8d-010292a418c3/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test10-2.i[33022,33035] [2021-11-03 04:56:27,804 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:56:27,860 INFO L208 MainTranslator]: Completed translation [2021-11-03 04:56:27,860 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:56:27 WrapperNode [2021-11-03 04:56:27,860 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:56:27,862 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 04:56:27,862 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 04:56:27,865 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 04:56:27,872 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:56:27" (1/1) ... [2021-11-03 04:56:27,962 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:56:27" (1/1) ... [2021-11-03 04:56:28,121 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 04:56:28,123 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 04:56:28,123 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 04:56:28,123 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 04:56:28,132 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:56:27" (1/1) ... [2021-11-03 04:56:28,132 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:56:27" (1/1) ... [2021-11-03 04:56:28,156 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:56:27" (1/1) ... [2021-11-03 04:56:28,156 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:56:27" (1/1) ... [2021-11-03 04:56:28,285 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:56:27" (1/1) ... [2021-11-03 04:56:28,328 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:56:27" (1/1) ... [2021-11-03 04:56:28,343 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:56:27" (1/1) ... [2021-11-03 04:56:28,374 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 04:56:28,377 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 04:56:28,377 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 04:56:28,377 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 04:56:28,378 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:56:27" (1/1) ... [2021-11-03 04:56:28,385 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:56:28,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:56:28,407 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 04:56:28,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 04:56:28,453 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-03 04:56:28,492 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-03 04:56:28,492 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-03 04:56:28,492 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-03 04:56:28,492 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 04:56:28,492 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-03 04:56:28,492 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-03 04:56:28,492 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-03 04:56:28,492 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-03 04:56:28,492 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-03 04:56:28,492 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 04:56:28,493 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 04:56:37,464 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 04:56:37,465 INFO L299 CfgBuilder]: Removed 216 assume(true) statements. [2021-11-03 04:56:37,470 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:56:37 BoogieIcfgContainer [2021-11-03 04:56:37,470 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 04:56:37,472 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 04:56:37,472 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 04:56:37,475 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 04:56:37,475 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:56:26" (1/3) ... [2021-11-03 04:56:37,476 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@579aa2ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:56:37, skipping insertion in model container [2021-11-03 04:56:37,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:56:27" (2/3) ... [2021-11-03 04:56:37,477 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@579aa2ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:56:37, skipping insertion in model container [2021-11-03 04:56:37,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:56:37" (3/3) ... [2021-11-03 04:56:37,478 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_BER_test10-2.i [2021-11-03 04:56:37,483 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 04:56:37,484 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1110 error locations. [2021-11-03 04:56:37,541 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 04:56:37,547 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 04:56:37,547 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1110 error locations. [2021-11-03 04:56:37,614 INFO L276 IsEmpty]: Start isEmpty. Operand has 2322 states, 1211 states have (on average 2.199009083402147) internal successors, (2663), 2321 states have internal predecessors, (2663), 0 states have call successors, (0), 0 states 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 04:56:37,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-03 04:56:37,618 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:56:37,619 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-03 04:56:37,619 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-03 04:56:37,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:56:37,624 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2021-11-03 04:56:37,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:56:37,634 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [506762943] [2021-11-03 04:56:37,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:56:37,635 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:56:37,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:56:37,636 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:56:37,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 04:56:37,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:56:37,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:56:37,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:56:37,934 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 04:56:37,944 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 04:56:37,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:56:37,964 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 04:56:37,964 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:56:37,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [506762943] [2021-11-03 04:56:37,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [506762943] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:56:37,966 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:56:37,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 04:56:37,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867443119] [2021-11-03 04:56:37,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:56:37,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:56:37,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:56:37,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:56:37,991 INFO L87 Difference]: Start difference. First operand has 2322 states, 1211 states have (on average 2.199009083402147) internal successors, (2663), 2321 states have internal predecessors, (2663), 0 states have call successors, (0), 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 04:56:42,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:56:42,193 INFO L93 Difference]: Finished difference Result 3006 states and 3198 transitions. [2021-11-03 04:56:42,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:56:42,194 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 04:56:42,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:56:42,225 INFO L225 Difference]: With dead ends: 3006 [2021-11-03 04:56:42,226 INFO L226 Difference]: Without dead ends: 3004 [2021-11-03 04:56:42,227 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 04:56:42,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3004 states. [2021-11-03 04:56:42,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3004 to 2470. [2021-11-03 04:56:42,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2470 states, 1383 states have (on average 2.0325379609544467) internal successors, (2811), 2469 states have internal predecessors, (2811), 0 states have call successors, (0), 0 states 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 04:56:42,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2470 states to 2470 states and 2811 transitions. [2021-11-03 04:56:42,418 INFO L78 Accepts]: Start accepts. Automaton has 2470 states and 2811 transitions. Word has length 3 [2021-11-03 04:56:42,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:56:42,419 INFO L470 AbstractCegarLoop]: Abstraction has 2470 states and 2811 transitions. [2021-11-03 04:56:42,419 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 04:56:42,420 INFO L276 IsEmpty]: Start isEmpty. Operand 2470 states and 2811 transitions. [2021-11-03 04:56:42,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-03 04:56:42,420 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:56:42,421 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-03 04:56:42,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-03 04:56:42,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:56:42,633 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-03 04:56:42,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:56:42,635 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2021-11-03 04:56:42,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:56:42,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [635423543] [2021-11-03 04:56:42,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:56:42,639 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:56:42,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:56:42,641 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:56:42,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 04:56:42,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:56:42,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:56:42,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:56:42,850 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 04:56:42,872 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 04:56:42,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:56:42,927 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 04:56:42,927 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:56:42,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [635423543] [2021-11-03 04:56:42,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [635423543] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:56:42,929 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:56:42,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-03 04:56:42,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710068756] [2021-11-03 04:56:42,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:56:42,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:56:42,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:56:42,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:56:42,941 INFO L87 Difference]: Start difference. First operand 2470 states and 2811 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 04:56:51,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:56:51,828 INFO L93 Difference]: Finished difference Result 3838 states and 4302 transitions. [2021-11-03 04:56:51,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:56:51,833 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 04:56:51,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:56:51,853 INFO L225 Difference]: With dead ends: 3838 [2021-11-03 04:56:51,853 INFO L226 Difference]: Without dead ends: 3838 [2021-11-03 04:56:51,855 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 04:56:51,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3838 states. [2021-11-03 04:56:51,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3838 to 2634. [2021-11-03 04:56:51,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2634 states, 1559 states have (on average 2.0224502886465685) internal successors, (3153), 2633 states have internal predecessors, (3153), 0 states have call successors, (0), 0 states 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 04:56:51,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2634 states to 2634 states and 3153 transitions. [2021-11-03 04:56:51,965 INFO L78 Accepts]: Start accepts. Automaton has 2634 states and 3153 transitions. Word has length 3 [2021-11-03 04:56:51,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:56:51,965 INFO L470 AbstractCegarLoop]: Abstraction has 2634 states and 3153 transitions. [2021-11-03 04:56:51,966 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 04:56:51,966 INFO L276 IsEmpty]: Start isEmpty. Operand 2634 states and 3153 transitions. [2021-11-03 04:56:51,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-03 04:56:51,966 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:56:51,967 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:56:51,985 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-03 04:56:52,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:56:52,179 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-03 04:56:52,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:56:52,183 INFO L85 PathProgramCache]: Analyzing trace with hash 62249618, now seen corresponding path program 1 times [2021-11-03 04:56:52,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:56:52,186 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [727140136] [2021-11-03 04:56:52,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:56:52,187 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:56:52,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:56:52,190 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:56:52,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-03 04:56:52,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:56:52,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:56:52,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:56:52,439 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 04:56:52,465 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 04:56:52,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:56:52,483 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 04:56:52,484 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:56:52,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [727140136] [2021-11-03 04:56:52,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [727140136] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:56:52,485 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:56:52,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 04:56:52,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431786243] [2021-11-03 04:56:52,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:56:52,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:56:52,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:56:52,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:56:52,487 INFO L87 Difference]: Start difference. First operand 2634 states and 3153 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:56:55,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:56:55,631 INFO L93 Difference]: Finished difference Result 3440 states and 3971 transitions. [2021-11-03 04:56:55,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:56:55,632 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-03 04:56:55,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:56:55,655 INFO L225 Difference]: With dead ends: 3440 [2021-11-03 04:56:55,655 INFO L226 Difference]: Without dead ends: 3440 [2021-11-03 04:56:55,656 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:56:55,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3440 states. [2021-11-03 04:56:55,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3440 to 2543. [2021-11-03 04:56:55,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2543 states, 1559 states have (on average 1.9422706863373957) internal successors, (3028), 2542 states have internal predecessors, (3028), 0 states have call successors, (0), 0 states 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 04:56:55,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2543 states to 2543 states and 3028 transitions. [2021-11-03 04:56:55,713 INFO L78 Accepts]: Start accepts. Automaton has 2543 states and 3028 transitions. Word has length 8 [2021-11-03 04:56:55,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:56:55,714 INFO L470 AbstractCegarLoop]: Abstraction has 2543 states and 3028 transitions. [2021-11-03 04:56:55,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:56:55,714 INFO L276 IsEmpty]: Start isEmpty. Operand 2543 states and 3028 transitions. [2021-11-03 04:56:55,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-03 04:56:55,715 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:56:55,715 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:56:55,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-03 04:56:55,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:56:55,927 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-03 04:56:55,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:56:55,930 INFO L85 PathProgramCache]: Analyzing trace with hash 62249619, now seen corresponding path program 1 times [2021-11-03 04:56:55,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:56:55,931 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1834339022] [2021-11-03 04:56:55,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:56:55,931 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:56:55,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:56:55,932 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:56:55,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-03 04:56:56,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:56:56,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:56:56,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:56:56,156 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 04:56:56,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:56:56,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:56:56,272 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 04:56:56,273 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:56:56,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1834339022] [2021-11-03 04:56:56,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1834339022] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:56:56,273 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:56:56,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-03 04:56:56,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741505197] [2021-11-03 04:56:56,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:56:56,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:56:56,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:56:56,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:56:56,275 INFO L87 Difference]: Start difference. First operand 2543 states and 3028 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:57:04,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:57:04,537 INFO L93 Difference]: Finished difference Result 3569 states and 4002 transitions. [2021-11-03 04:57:04,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:57:04,538 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-03 04:57:04,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:57:04,557 INFO L225 Difference]: With dead ends: 3569 [2021-11-03 04:57:04,557 INFO L226 Difference]: Without dead ends: 3569 [2021-11-03 04:57:04,557 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:57:04,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3569 states. [2021-11-03 04:57:04,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3569 to 2535. [2021-11-03 04:57:04,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2535 states, 1561 states have (on average 1.9269698910954516) internal successors, (3008), 2534 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states 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 04:57:04,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2535 states to 2535 states and 3008 transitions. [2021-11-03 04:57:04,612 INFO L78 Accepts]: Start accepts. Automaton has 2535 states and 3008 transitions. Word has length 8 [2021-11-03 04:57:04,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:57:04,613 INFO L470 AbstractCegarLoop]: Abstraction has 2535 states and 3008 transitions. [2021-11-03 04:57:04,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:57:04,613 INFO L276 IsEmpty]: Start isEmpty. Operand 2535 states and 3008 transitions. [2021-11-03 04:57:04,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-03 04:57:04,614 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:57:04,614 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:57:04,626 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-03 04:57:04,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:57:04,825 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr658REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-03 04:57:04,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:57:04,827 INFO L85 PathProgramCache]: Analyzing trace with hash 175289392, now seen corresponding path program 1 times [2021-11-03 04:57:04,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:57:04,832 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [490829037] [2021-11-03 04:57:04,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:57:04,833 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:57:04,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:57:04,834 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:57:04,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-03 04:57:05,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:57:05,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:57:05,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:57:05,092 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 04:57:05,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:57:05,126 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 04:57:05,127 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:57:05,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [490829037] [2021-11-03 04:57:05,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [490829037] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:57:05,128 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:57:05,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:57:05,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151274042] [2021-11-03 04:57:05,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:57:05,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:57:05,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:57:05,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:57:05,130 INFO L87 Difference]: Start difference. First operand 2535 states and 3008 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:57:05,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:57:05,179 INFO L93 Difference]: Finished difference Result 2493 states and 2965 transitions. [2021-11-03 04:57:05,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:57:05,180 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-03 04:57:05,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:57:05,192 INFO L225 Difference]: With dead ends: 2493 [2021-11-03 04:57:05,193 INFO L226 Difference]: Without dead ends: 2493 [2021-11-03 04:57:05,193 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:57:05,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2493 states. [2021-11-03 04:57:05,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2493 to 2493. [2021-11-03 04:57:05,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2493 states, 1543 states have (on average 1.9215813350615685) internal successors, (2965), 2492 states have internal predecessors, (2965), 0 states have call successors, (0), 0 states 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 04:57:05,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2493 states to 2493 states and 2965 transitions. [2021-11-03 04:57:05,239 INFO L78 Accepts]: Start accepts. Automaton has 2493 states and 2965 transitions. Word has length 11 [2021-11-03 04:57:05,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:57:05,240 INFO L470 AbstractCegarLoop]: Abstraction has 2493 states and 2965 transitions. [2021-11-03 04:57:05,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:57:05,240 INFO L276 IsEmpty]: Start isEmpty. Operand 2493 states and 2965 transitions. [2021-11-03 04:57:05,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-03 04:57:05,241 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:57:05,241 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:57:05,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-03 04:57:05,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:57:05,453 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr682REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-03 04:57:05,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:57:05,453 INFO L85 PathProgramCache]: Analyzing trace with hash 949435626, now seen corresponding path program 1 times [2021-11-03 04:57:05,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:57:05,454 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [324137782] [2021-11-03 04:57:05,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:57:05,454 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:57:05,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:57:05,456 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:57:05,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-03 04:57:05,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:57:05,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:57:05,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:57:05,716 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 04:57:05,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:57:05,752 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 04:57:05,752 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:57:05,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [324137782] [2021-11-03 04:57:05,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [324137782] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:57:05,752 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:57:05,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 04:57:05,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649405830] [2021-11-03 04:57:05,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:57:05,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:57:05,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:57:05,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:57:05,754 INFO L87 Difference]: Start difference. First operand 2493 states and 2965 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:57:05,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:57:05,859 INFO L93 Difference]: Finished difference Result 2472 states and 2937 transitions. [2021-11-03 04:57:05,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:57:05,860 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-03 04:57:05,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:57:05,872 INFO L225 Difference]: With dead ends: 2472 [2021-11-03 04:57:05,872 INFO L226 Difference]: Without dead ends: 2472 [2021-11-03 04:57:05,872 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:57:05,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2472 states. [2021-11-03 04:57:05,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2472 to 2471. [2021-11-03 04:57:05,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2471 states, 1535 states have (on average 1.9127035830618893) internal successors, (2936), 2470 states have internal predecessors, (2936), 0 states have call successors, (0), 0 states 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 04:57:05,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2471 states to 2471 states and 2936 transitions. [2021-11-03 04:57:05,922 INFO L78 Accepts]: Start accepts. Automaton has 2471 states and 2936 transitions. Word has length 13 [2021-11-03 04:57:05,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:57:05,922 INFO L470 AbstractCegarLoop]: Abstraction has 2471 states and 2936 transitions. [2021-11-03 04:57:05,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:57:05,922 INFO L276 IsEmpty]: Start isEmpty. Operand 2471 states and 2936 transitions. [2021-11-03 04:57:05,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-03 04:57:05,924 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:57:05,924 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] [2021-11-03 04:57:05,941 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-03 04:57:06,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:57:06,136 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr334REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-03 04:57:06,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:57:06,136 INFO L85 PathProgramCache]: Analyzing trace with hash 270217471, now seen corresponding path program 1 times [2021-11-03 04:57:06,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:57:06,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1623307711] [2021-11-03 04:57:06,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:57:06,137 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:57:06,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:57:06,139 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:57:06,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-03 04:57:06,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:57:06,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:57:06,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:57:06,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:57:06,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:57:06,486 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 04:57:06,486 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:57:06,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1623307711] [2021-11-03 04:57:06,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1623307711] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:57:06,487 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:57:06,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:57:06,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213231822] [2021-11-03 04:57:06,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:57:06,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:57:06,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:57:06,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:57:06,489 INFO L87 Difference]: Start difference. First operand 2471 states and 2936 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:57:06,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:57:06,548 INFO L93 Difference]: Finished difference Result 3981 states and 4554 transitions. [2021-11-03 04:57:06,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:57:06,549 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-03 04:57:06,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:57:06,568 INFO L225 Difference]: With dead ends: 3981 [2021-11-03 04:57:06,568 INFO L226 Difference]: Without dead ends: 3981 [2021-11-03 04:57:06,569 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:57:06,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3981 states. [2021-11-03 04:57:06,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3981 to 2393. [2021-11-03 04:57:06,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2393 states, 1481 states have (on average 1.8953409858203916) internal successors, (2807), 2392 states have internal predecessors, (2807), 0 states have call successors, (0), 0 states 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 04:57:06,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2393 states to 2393 states and 2807 transitions. [2021-11-03 04:57:06,625 INFO L78 Accepts]: Start accepts. Automaton has 2393 states and 2807 transitions. Word has length 20 [2021-11-03 04:57:06,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:57:06,625 INFO L470 AbstractCegarLoop]: Abstraction has 2393 states and 2807 transitions. [2021-11-03 04:57:06,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:57:06,626 INFO L276 IsEmpty]: Start isEmpty. Operand 2393 states and 2807 transitions. [2021-11-03 04:57:06,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-03 04:57:06,627 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:57:06,627 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] [2021-11-03 04:57:06,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-03 04:57:06,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:57:06,839 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-03 04:57:06,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:57:06,840 INFO L85 PathProgramCache]: Analyzing trace with hash -673839521, now seen corresponding path program 1 times [2021-11-03 04:57:06,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:57:06,840 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [813708527] [2021-11-03 04:57:06,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:57:06,840 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:57:06,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:57:06,846 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:57:06,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-03 04:57:07,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:57:07,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:57:07,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:57:07,139 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 04:57:07,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:57:07,185 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 04:57:07,185 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:57:07,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [813708527] [2021-11-03 04:57:07,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [813708527] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:57:07,186 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:57:07,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:57:07,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70790791] [2021-11-03 04:57:07,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:57:07,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:57:07,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:57:07,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:57:07,189 INFO L87 Difference]: Start difference. First operand 2393 states and 2807 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:57:07,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:57:07,259 INFO L93 Difference]: Finished difference Result 3904 states and 4477 transitions. [2021-11-03 04:57:07,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:57:07,260 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-03 04:57:07,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:57:07,284 INFO L225 Difference]: With dead ends: 3904 [2021-11-03 04:57:07,288 INFO L226 Difference]: Without dead ends: 3904 [2021-11-03 04:57:07,288 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:57:07,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3904 states. [2021-11-03 04:57:07,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3904 to 2351. [2021-11-03 04:57:07,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2351 states, 1463 states have (on average 1.8892686261107314) internal successors, (2764), 2350 states have internal predecessors, (2764), 0 states have call successors, (0), 0 states 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 04:57:07,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2351 states to 2351 states and 2764 transitions. [2021-11-03 04:57:07,340 INFO L78 Accepts]: Start accepts. Automaton has 2351 states and 2764 transitions. Word has length 20 [2021-11-03 04:57:07,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:57:07,342 INFO L470 AbstractCegarLoop]: Abstraction has 2351 states and 2764 transitions. [2021-11-03 04:57:07,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:57:07,343 INFO L276 IsEmpty]: Start isEmpty. Operand 2351 states and 2764 transitions. [2021-11-03 04:57:07,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-03 04:57:07,345 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:57:07,345 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] [2021-11-03 04:57:07,361 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-03 04:57:07,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:57:07,557 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr358REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-03 04:57:07,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:57:07,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1980977049, now seen corresponding path program 1 times [2021-11-03 04:57:07,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:57:07,559 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [262794912] [2021-11-03 04:57:07,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:57:07,559 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:57:07,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:57:07,560 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:57:07,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-03 04:57:07,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:57:07,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:57:07,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:57:07,838 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 04:57:07,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:57:07,893 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 04:57:07,893 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:57:07,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [262794912] [2021-11-03 04:57:07,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [262794912] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:57:07,893 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:57:07,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 04:57:07,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95343400] [2021-11-03 04:57:07,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:57:07,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:57:07,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:57:07,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:57:07,895 INFO L87 Difference]: Start difference. First operand 2351 states and 2764 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:57:08,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:57:08,016 INFO L93 Difference]: Finished difference Result 3862 states and 4384 transitions. [2021-11-03 04:57:08,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:57:08,016 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-03 04:57:08,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:57:08,029 INFO L225 Difference]: With dead ends: 3862 [2021-11-03 04:57:08,030 INFO L226 Difference]: Without dead ends: 3862 [2021-11-03 04:57:08,030 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:57:08,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3862 states. [2021-11-03 04:57:08,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3862 to 2313. [2021-11-03 04:57:08,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2313 states, 1439 states have (on average 1.8603196664350243) internal successors, (2677), 2312 states have internal predecessors, (2677), 0 states have call successors, (0), 0 states 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 04:57:08,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2313 states to 2313 states and 2677 transitions. [2021-11-03 04:57:08,080 INFO L78 Accepts]: Start accepts. Automaton has 2313 states and 2677 transitions. Word has length 22 [2021-11-03 04:57:08,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:57:08,081 INFO L470 AbstractCegarLoop]: Abstraction has 2313 states and 2677 transitions. [2021-11-03 04:57:08,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:57:08,082 INFO L276 IsEmpty]: Start isEmpty. Operand 2313 states and 2677 transitions. [2021-11-03 04:57:08,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-03 04:57:08,082 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:57:08,083 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] [2021-11-03 04:57:08,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-03 04:57:08,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:57:08,295 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr40REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-03 04:57:08,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:57:08,296 INFO L85 PathProgramCache]: Analyzing trace with hash 980278297, now seen corresponding path program 1 times [2021-11-03 04:57:08,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:57:08,296 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1910960004] [2021-11-03 04:57:08,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:57:08,297 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:57:08,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:57:08,298 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:57:08,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-03 04:57:08,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:57:08,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:57:08,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:57:08,605 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 04:57:08,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:57:08,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:57:08,666 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:57:08,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1910960004] [2021-11-03 04:57:08,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1910960004] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:57:08,667 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:57:08,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 04:57:08,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465149042] [2021-11-03 04:57:08,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:57:08,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:57:08,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:57:08,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:57:08,669 INFO L87 Difference]: Start difference. First operand 2313 states and 2677 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:57:08,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:57:08,785 INFO L93 Difference]: Finished difference Result 3823 states and 4333 transitions. [2021-11-03 04:57:08,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:57:08,786 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-03 04:57:08,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:57:08,821 INFO L225 Difference]: With dead ends: 3823 [2021-11-03 04:57:08,822 INFO L226 Difference]: Without dead ends: 3823 [2021-11-03 04:57:08,822 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:57:08,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3823 states. [2021-11-03 04:57:08,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3823 to 2291. [2021-11-03 04:57:08,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2291 states, 1431 states have (on average 1.8504542278127183) internal successors, (2648), 2290 states have internal predecessors, (2648), 0 states have call successors, (0), 0 states 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 04:57:08,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2291 states to 2291 states and 2648 transitions. [2021-11-03 04:57:08,869 INFO L78 Accepts]: Start accepts. Automaton has 2291 states and 2648 transitions. Word has length 22 [2021-11-03 04:57:08,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:57:08,870 INFO L470 AbstractCegarLoop]: Abstraction has 2291 states and 2648 transitions. [2021-11-03 04:57:08,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:57:08,870 INFO L276 IsEmpty]: Start isEmpty. Operand 2291 states and 2648 transitions. [2021-11-03 04:57:08,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-03 04:57:08,871 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:57:08,872 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:57:08,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-03 04:57:09,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:57:09,084 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr696REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-03 04:57:09,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:57:09,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1893283832, now seen corresponding path program 1 times [2021-11-03 04:57:09,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:57:09,085 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1418287651] [2021-11-03 04:57:09,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:57:09,085 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:57:09,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:57:09,086 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:57:09,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-03 04:57:09,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:57:09,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:57:09,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:57:09,334 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 04:57:09,427 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 04:57:09,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:57:09,549 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 04:57:09,550 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:57:09,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1418287651] [2021-11-03 04:57:09,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1418287651] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:57:09,550 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:57:09,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 04:57:09,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92985126] [2021-11-03 04:57:09,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:57:09,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:57:09,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:57:09,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:57:09,552 INFO L87 Difference]: Start difference. First operand 2291 states and 2648 transitions. Second operand has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:57:13,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:57:13,285 INFO L93 Difference]: Finished difference Result 2746 states and 3014 transitions. [2021-11-03 04:57:13,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:57:13,285 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-03 04:57:13,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:57:13,293 INFO L225 Difference]: With dead ends: 2746 [2021-11-03 04:57:13,293 INFO L226 Difference]: Without dead ends: 2746 [2021-11-03 04:57:13,293 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 50 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 04:57:13,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2746 states. [2021-11-03 04:57:13,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2746 to 2287. [2021-11-03 04:57:13,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2287 states, 1431 states have (on average 1.8476589797344514) internal successors, (2644), 2286 states have internal predecessors, (2644), 0 states have call successors, (0), 0 states 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 04:57:13,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2287 states to 2287 states and 2644 transitions. [2021-11-03 04:57:13,333 INFO L78 Accepts]: Start accepts. Automaton has 2287 states and 2644 transitions. Word has length 27 [2021-11-03 04:57:13,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:57:13,334 INFO L470 AbstractCegarLoop]: Abstraction has 2287 states and 2644 transitions. [2021-11-03 04:57:13,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:57:13,334 INFO L276 IsEmpty]: Start isEmpty. Operand 2287 states and 2644 transitions. [2021-11-03 04:57:13,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-03 04:57:13,335 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:57:13,336 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:57:13,347 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-11-03 04:57:13,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:57:13,547 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr697REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-03 04:57:13,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:57:13,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1893283833, now seen corresponding path program 1 times [2021-11-03 04:57:13,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:57:13,548 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2032734237] [2021-11-03 04:57:13,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:57:13,548 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:57:13,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:57:13,549 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:57:13,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-03 04:57:13,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:57:13,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:57:13,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:57:13,796 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 04:57:14,066 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 04:57:14,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:57:14,484 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 04:57:14,484 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:57:14,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2032734237] [2021-11-03 04:57:14,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2032734237] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:57:14,485 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:57:14,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-03 04:57:14,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416377163] [2021-11-03 04:57:14,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:57:14,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:57:14,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:57:14,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:57:14,487 INFO L87 Difference]: Start difference. First operand 2287 states and 2644 transitions. Second operand has 6 states, 5 states have (on average 10.6) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:57:25,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:57:25,629 INFO L93 Difference]: Finished difference Result 3352 states and 3707 transitions. [2021-11-03 04:57:25,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 04:57:25,631 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-03 04:57:25,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:57:25,637 INFO L225 Difference]: With dead ends: 3352 [2021-11-03 04:57:25,637 INFO L226 Difference]: Without dead ends: 3352 [2021-11-03 04:57:25,638 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:57:25,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3352 states. [2021-11-03 04:57:25,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3352 to 2320. [2021-11-03 04:57:25,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2320 states, 1465 states have (on average 1.8300341296928329) internal successors, (2681), 2319 states have internal predecessors, (2681), 0 states have call successors, (0), 0 states 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 04:57:25,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2320 states to 2320 states and 2681 transitions. [2021-11-03 04:57:25,708 INFO L78 Accepts]: Start accepts. Automaton has 2320 states and 2681 transitions. Word has length 27 [2021-11-03 04:57:25,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:57:25,708 INFO L470 AbstractCegarLoop]: Abstraction has 2320 states and 2681 transitions. [2021-11-03 04:57:25,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:57:25,709 INFO L276 IsEmpty]: Start isEmpty. Operand 2320 states and 2681 transitions. [2021-11-03 04:57:25,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-03 04:57:25,713 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:57:25,714 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] [2021-11-03 04:57:25,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-03 04:57:25,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:57:25,926 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr372REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-03 04:57:25,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:57:25,926 INFO L85 PathProgramCache]: Analyzing trace with hash 187122631, now seen corresponding path program 1 times [2021-11-03 04:57:25,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:57:25,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2126860255] [2021-11-03 04:57:25,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:57:25,929 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:57:25,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:57:25,930 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:57:25,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-03 04:57:26,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:57:26,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:57:26,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:57:26,233 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 04:57:26,361 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 04:57:26,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:57:26,504 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 04:57:26,505 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:57:26,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2126860255] [2021-11-03 04:57:26,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2126860255] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:57:26,505 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:57:26,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 04:57:26,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899897710] [2021-11-03 04:57:26,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:57:26,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:57:26,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:57:26,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:57:26,506 INFO L87 Difference]: Start difference. First operand 2320 states and 2681 transitions. Second operand has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:57:32,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:57:32,910 INFO L93 Difference]: Finished difference Result 4930 states and 5526 transitions. [2021-11-03 04:57:32,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:57:32,910 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-03 04:57:32,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:57:32,920 INFO L225 Difference]: With dead ends: 4930 [2021-11-03 04:57:32,920 INFO L226 Difference]: Without dead ends: 4930 [2021-11-03 04:57:32,920 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 67 SyntacticMatches, 2 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 04:57:32,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4930 states. [2021-11-03 04:57:32,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4930 to 2317. [2021-11-03 04:57:32,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2317 states, 1465 states have (on average 1.8225255972696246) internal successors, (2670), 2316 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states 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 04:57:32,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2317 states to 2317 states and 2670 transitions. [2021-11-03 04:57:32,962 INFO L78 Accepts]: Start accepts. Automaton has 2317 states and 2670 transitions. Word has length 36 [2021-11-03 04:57:32,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:57:32,962 INFO L470 AbstractCegarLoop]: Abstraction has 2317 states and 2670 transitions. [2021-11-03 04:57:32,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:57:32,963 INFO L276 IsEmpty]: Start isEmpty. Operand 2317 states and 2670 transitions. [2021-11-03 04:57:32,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-03 04:57:32,963 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:57:32,964 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] [2021-11-03 04:57:32,989 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-03 04:57:33,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:57:33,176 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr373REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-03 04:57:33,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:57:33,176 INFO L85 PathProgramCache]: Analyzing trace with hash 187122632, now seen corresponding path program 1 times [2021-11-03 04:57:33,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:57:33,177 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [990726523] [2021-11-03 04:57:33,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:57:33,177 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:57:33,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:57:33,179 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:57:33,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-03 04:57:33,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:57:33,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:57:33,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:57:33,555 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 04:57:33,826 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 04:57:33,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:57:34,277 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 04:57:34,277 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:57:34,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [990726523] [2021-11-03 04:57:34,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [990726523] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:57:34,277 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:57:34,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-03 04:57:34,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399885564] [2021-11-03 04:57:34,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:57:34,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:57:34,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:57:34,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:57:34,279 INFO L87 Difference]: Start difference. First operand 2317 states and 2670 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:57:52,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:57:52,055 INFO L93 Difference]: Finished difference Result 4863 states and 5399 transitions. [2021-11-03 04:57:52,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 04:57:52,056 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-03 04:57:52,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:57:52,064 INFO L225 Difference]: With dead ends: 4863 [2021-11-03 04:57:52,065 INFO L226 Difference]: Without dead ends: 4863 [2021-11-03 04:57:52,065 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 67 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 04:57:52,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4863 states. [2021-11-03 04:57:52,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4863 to 2317. [2021-11-03 04:57:52,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2317 states, 1465 states have (on average 1.8197952218430034) internal successors, (2666), 2316 states have internal predecessors, (2666), 0 states have call successors, (0), 0 states 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 04:57:52,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2317 states to 2317 states and 2666 transitions. [2021-11-03 04:57:52,110 INFO L78 Accepts]: Start accepts. Automaton has 2317 states and 2666 transitions. Word has length 36 [2021-11-03 04:57:52,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:57:52,111 INFO L470 AbstractCegarLoop]: Abstraction has 2317 states and 2666 transitions. [2021-11-03 04:57:52,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:57:52,111 INFO L276 IsEmpty]: Start isEmpty. Operand 2317 states and 2666 transitions. [2021-11-03 04:57:52,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-03 04:57:52,112 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:57:52,112 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:57:52,126 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-03 04:57:52,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:57:52,326 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr54REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-03 04:57:52,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:57:52,326 INFO L85 PathProgramCache]: Analyzing trace with hash -773066201, now seen corresponding path program 1 times [2021-11-03 04:57:52,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:57:52,327 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1903878851] [2021-11-03 04:57:52,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:57:52,327 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:57:52,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:57:52,329 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:57:52,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-03 04:57:52,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:57:52,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:57:52,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:57:52,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 04:57:52,780 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 04:57:52,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:57:52,899 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 04:57:52,899 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:57:52,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1903878851] [2021-11-03 04:57:52,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1903878851] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:57:52,900 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:57:52,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 04:57:52,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891506290] [2021-11-03 04:57:52,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:57:52,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:57:52,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:57:52,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:57:52,901 INFO L87 Difference]: Start difference. First operand 2317 states and 2666 transitions. Second operand has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:57:58,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:57:58,661 INFO L93 Difference]: Finished difference Result 4534 states and 5106 transitions. [2021-11-03 04:57:58,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:57:58,661 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-03 04:57:58,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:57:58,665 INFO L225 Difference]: With dead ends: 4534 [2021-11-03 04:57:58,665 INFO L226 Difference]: Without dead ends: 4534 [2021-11-03 04:57:58,665 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:57:58,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4534 states. [2021-11-03 04:57:58,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4534 to 2313. [2021-11-03 04:57:58,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2313 states, 1465 states have (on average 1.8170648464163823) internal successors, (2662), 2312 states have internal predecessors, (2662), 0 states have call successors, (0), 0 states 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 04:57:58,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2313 states to 2313 states and 2662 transitions. [2021-11-03 04:57:58,700 INFO L78 Accepts]: Start accepts. Automaton has 2313 states and 2662 transitions. Word has length 36 [2021-11-03 04:57:58,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:57:58,701 INFO L470 AbstractCegarLoop]: Abstraction has 2313 states and 2662 transitions. [2021-11-03 04:57:58,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:57:58,701 INFO L276 IsEmpty]: Start isEmpty. Operand 2313 states and 2662 transitions. [2021-11-03 04:57:58,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-03 04:57:58,702 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:57:58,702 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] [2021-11-03 04:57:58,718 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-03 04:57:58,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:57:58,918 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr55REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-03 04:57:58,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:57:58,918 INFO L85 PathProgramCache]: Analyzing trace with hash -773066200, now seen corresponding path program 1 times [2021-11-03 04:57:58,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:57:58,919 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [592259759] [2021-11-03 04:57:58,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:57:58,919 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:57:58,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:57:58,920 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:57:58,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-03 04:57:59,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:57:59,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:57:59,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:57:59,317 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 04:57:59,587 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 04:57:59,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:58:00,004 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 04:58:00,004 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:58:00,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [592259759] [2021-11-03 04:58:00,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [592259759] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:58:00,004 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:58:00,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-03 04:58:00,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451960209] [2021-11-03 04:58:00,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:58:00,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:58:00,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:58:00,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:58:00,006 INFO L87 Difference]: Start difference. First operand 2313 states and 2662 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:58:15,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:58:15,493 INFO L93 Difference]: Finished difference Result 4430 states and 4882 transitions. [2021-11-03 04:58:15,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:58:15,493 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-03 04:58:15,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:58:15,497 INFO L225 Difference]: With dead ends: 4430 [2021-11-03 04:58:15,497 INFO L226 Difference]: Without dead ends: 4430 [2021-11-03 04:58:15,497 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 67 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 04:58:15,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4430 states. [2021-11-03 04:58:15,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4430 to 2309. [2021-11-03 04:58:15,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2309 states, 1465 states have (on average 1.814334470989761) internal successors, (2658), 2308 states have internal predecessors, (2658), 0 states have call successors, (0), 0 states 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 04:58:15,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2309 states to 2309 states and 2658 transitions. [2021-11-03 04:58:15,527 INFO L78 Accepts]: Start accepts. Automaton has 2309 states and 2658 transitions. Word has length 36 [2021-11-03 04:58:15,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:58:15,527 INFO L470 AbstractCegarLoop]: Abstraction has 2309 states and 2658 transitions. [2021-11-03 04:58:15,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:58:15,527 INFO L276 IsEmpty]: Start isEmpty. Operand 2309 states and 2658 transitions. [2021-11-03 04:58:15,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-03 04:58:15,528 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:58:15,528 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] [2021-11-03 04:58:15,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-03 04:58:15,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:58:15,741 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr704REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-03 04:58:15,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:58:15,741 INFO L85 PathProgramCache]: Analyzing trace with hash -480226171, now seen corresponding path program 1 times [2021-11-03 04:58:15,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:58:15,742 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1893649522] [2021-11-03 04:58:15,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:58:15,742 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:58:15,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:58:15,742 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:58:15,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-03 04:58:16,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:58:16,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:58:16,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:58:16,221 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 04:58:16,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:58:16,326 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 04:58:16,326 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:58:16,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1893649522] [2021-11-03 04:58:16,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1893649522] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:58:16,326 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:58:16,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 04:58:16,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198699411] [2021-11-03 04:58:16,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:58:16,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:58:16,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:58:16,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:58:16,329 INFO L87 Difference]: Start difference. First operand 2309 states and 2658 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:58:16,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:58:16,397 INFO L93 Difference]: Finished difference Result 2303 states and 2644 transitions. [2021-11-03 04:58:16,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:58:16,397 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-03 04:58:16,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:58:16,400 INFO L225 Difference]: With dead ends: 2303 [2021-11-03 04:58:16,400 INFO L226 Difference]: Without dead ends: 2303 [2021-11-03 04:58:16,401 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:58:16,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2303 states. [2021-11-03 04:58:16,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2303 to 2303. [2021-11-03 04:58:16,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2303 states, 1459 states have (on average 1.812200137080192) internal successors, (2644), 2302 states have internal predecessors, (2644), 0 states have call successors, (0), 0 states 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 04:58:16,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2303 states to 2303 states and 2644 transitions. [2021-11-03 04:58:16,429 INFO L78 Accepts]: Start accepts. Automaton has 2303 states and 2644 transitions. Word has length 40 [2021-11-03 04:58:16,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:58:16,429 INFO L470 AbstractCegarLoop]: Abstraction has 2303 states and 2644 transitions. [2021-11-03 04:58:16,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:58:16,430 INFO L276 IsEmpty]: Start isEmpty. Operand 2303 states and 2644 transitions. [2021-11-03 04:58:16,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-03 04:58:16,431 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:58:16,431 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:58:16,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-03 04:58:16,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:58:16,644 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr704REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-03 04:58:16,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:58:16,644 INFO L85 PathProgramCache]: Analyzing trace with hash -952585927, now seen corresponding path program 1 times [2021-11-03 04:58:16,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:58:16,644 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1690046617] [2021-11-03 04:58:16,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:58:16,645 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:58:16,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:58:16,645 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:58:16,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-03 04:58:17,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:58:17,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:58:17,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:58:17,356 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 04:58:17,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:58:17,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:58:17,718 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:58:17,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1690046617] [2021-11-03 04:58:17,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1690046617] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:58:17,718 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:58:17,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 04:58:17,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826001127] [2021-11-03 04:58:17,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:58:17,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:58:17,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:58:17,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:58:17,722 INFO L87 Difference]: Start difference. First operand 2303 states and 2644 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:58:17,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:58:17,999 INFO L93 Difference]: Finished difference Result 3720 states and 4199 transitions. [2021-11-03 04:58:18,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:58:18,000 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-03 04:58:18,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:58:18,003 INFO L225 Difference]: With dead ends: 3720 [2021-11-03 04:58:18,003 INFO L226 Difference]: Without dead ends: 3720 [2021-11-03 04:58:18,003 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:58:18,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3720 states. [2021-11-03 04:58:18,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3720 to 3067. [2021-11-03 04:58:18,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3067 states, 2223 states have (on average 1.789923526765632) internal successors, (3979), 3066 states have internal predecessors, (3979), 0 states have call successors, (0), 0 states 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 04:58:18,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3067 states to 3067 states and 3979 transitions. [2021-11-03 04:58:18,044 INFO L78 Accepts]: Start accepts. Automaton has 3067 states and 3979 transitions. Word has length 48 [2021-11-03 04:58:18,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:58:18,044 INFO L470 AbstractCegarLoop]: Abstraction has 3067 states and 3979 transitions. [2021-11-03 04:58:18,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:58:18,045 INFO L276 IsEmpty]: Start isEmpty. Operand 3067 states and 3979 transitions. [2021-11-03 04:58:18,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-03 04:58:18,046 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:58:18,046 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:58:18,060 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-11-03 04:58:18,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:58:18,260 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr437REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-03 04:58:18,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:58:18,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1775606781, now seen corresponding path program 1 times [2021-11-03 04:58:18,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:58:18,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [908953656] [2021-11-03 04:58:18,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:58:18,261 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:58:18,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:58:18,262 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:58:18,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-03 04:58:18,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:58:18,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:58:18,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:58:18,886 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 04:58:18,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:58:19,001 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 04:58:19,001 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:58:19,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [908953656] [2021-11-03 04:58:19,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [908953656] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:58:19,001 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:58:19,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 04:58:19,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232409528] [2021-11-03 04:58:19,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:58:19,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:58:19,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:58:19,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:58:19,003 INFO L87 Difference]: Start difference. First operand 3067 states and 3979 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:58:19,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:58:19,068 INFO L93 Difference]: Finished difference Result 4294 states and 5284 transitions. [2021-11-03 04:58:19,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:58:19,069 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-03 04:58:19,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:58:19,074 INFO L225 Difference]: With dead ends: 4294 [2021-11-03 04:58:19,074 INFO L226 Difference]: Without dead ends: 4294 [2021-11-03 04:58:19,074 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:58:19,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4294 states. [2021-11-03 04:58:19,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4294 to 3043. [2021-11-03 04:58:19,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3043 states, 2199 states have (on average 1.791268758526603) internal successors, (3939), 3042 states have internal predecessors, (3939), 0 states have call successors, (0), 0 states 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 04:58:19,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3043 states to 3043 states and 3939 transitions. [2021-11-03 04:58:19,118 INFO L78 Accepts]: Start accepts. Automaton has 3043 states and 3939 transitions. Word has length 51 [2021-11-03 04:58:19,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:58:19,119 INFO L470 AbstractCegarLoop]: Abstraction has 3043 states and 3939 transitions. [2021-11-03 04:58:19,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:58:19,119 INFO L276 IsEmpty]: Start isEmpty. Operand 3043 states and 3939 transitions. [2021-11-03 04:58:19,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-03 04:58:19,120 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:58:19,120 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] [2021-11-03 04:58:19,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-03 04:58:19,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:58:19,334 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr73REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-03 04:58:19,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:58:19,335 INFO L85 PathProgramCache]: Analyzing trace with hash 732181606, now seen corresponding path program 1 times [2021-11-03 04:58:19,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:58:19,335 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [158498235] [2021-11-03 04:58:19,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:58:19,335 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:58:19,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:58:19,336 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:58:19,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-03 04:58:19,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:58:19,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:58:19,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:58:20,021 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 04:58:20,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:58:20,152 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 04:58:20,152 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:58:20,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [158498235] [2021-11-03 04:58:20,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [158498235] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:58:20,153 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:58:20,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 04:58:20,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538270893] [2021-11-03 04:58:20,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:58:20,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:58:20,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:58:20,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:58:20,154 INFO L87 Difference]: Start difference. First operand 3043 states and 3939 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:58:20,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:58:20,226 INFO L93 Difference]: Finished difference Result 4030 states and 4773 transitions. [2021-11-03 04:58:20,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:58:20,227 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-03 04:58:20,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:58:20,232 INFO L225 Difference]: With dead ends: 4030 [2021-11-03 04:58:20,232 INFO L226 Difference]: Without dead ends: 4030 [2021-11-03 04:58:20,233 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:58:20,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4030 states. [2021-11-03 04:58:20,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4030 to 3031. [2021-11-03 04:58:20,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3031 states, 2187 states have (on average 1.791952446273434) internal successors, (3919), 3030 states have internal predecessors, (3919), 0 states have call successors, (0), 0 states 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 04:58:20,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3031 states to 3031 states and 3919 transitions. [2021-11-03 04:58:20,276 INFO L78 Accepts]: Start accepts. Automaton has 3031 states and 3919 transitions. Word has length 54 [2021-11-03 04:58:20,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:58:20,277 INFO L470 AbstractCegarLoop]: Abstraction has 3031 states and 3919 transitions. [2021-11-03 04:58:20,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:58:20,277 INFO L276 IsEmpty]: Start isEmpty. Operand 3031 states and 3919 transitions. [2021-11-03 04:58:20,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-03 04:58:20,278 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:58:20,278 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] [2021-11-03 04:58:20,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-03 04:58:20,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:58:20,493 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr740ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-03 04:58:20,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:58:20,493 INFO L85 PathProgramCache]: Analyzing trace with hash -993308447, now seen corresponding path program 1 times [2021-11-03 04:58:20,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:58:20,493 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [288862069] [2021-11-03 04:58:20,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:58:20,494 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:58:20,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:58:20,495 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:58:20,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-03 04:58:21,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:58:21,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:58:21,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:58:21,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:58:21,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:58:21,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:58:21,103 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-03 04:58:21,104 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 04:58:21,173 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-03 04:58:21,174 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 04:58:21,295 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 04:58:21,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:58:21,453 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 04:58:21,453 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:58:21,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [288862069] [2021-11-03 04:58:21,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [288862069] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:58:21,453 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:58:21,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 04:58:21,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940625043] [2021-11-03 04:58:21,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:58:21,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:58:21,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:58:21,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:58:21,456 INFO L87 Difference]: Start difference. First operand 3031 states and 3919 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states 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 04:58:23,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:58:23,345 INFO L93 Difference]: Finished difference Result 3136 states and 4030 transitions. [2021-11-03 04:58:23,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:58:23,346 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-03 04:58:23,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:58:23,350 INFO L225 Difference]: With dead ends: 3136 [2021-11-03 04:58:23,350 INFO L226 Difference]: Without dead ends: 3136 [2021-11-03 04:58:23,350 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 102 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 04:58:23,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3136 states. [2021-11-03 04:58:23,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3136 to 2997. [2021-11-03 04:58:23,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2997 states, 2153 states have (on average 1.8039944263817929) internal successors, (3884), 2996 states have internal predecessors, (3884), 0 states have call successors, (0), 0 states 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 04:58:23,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2997 states to 2997 states and 3884 transitions. [2021-11-03 04:58:23,387 INFO L78 Accepts]: Start accepts. Automaton has 2997 states and 3884 transitions. Word has length 54 [2021-11-03 04:58:23,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:58:23,388 INFO L470 AbstractCegarLoop]: Abstraction has 2997 states and 3884 transitions. [2021-11-03 04:58:23,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states 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 04:58:23,388 INFO L276 IsEmpty]: Start isEmpty. Operand 2997 states and 3884 transitions. [2021-11-03 04:58:23,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-03 04:58:23,389 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:58:23,389 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:58:23,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-03 04:58:23,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:58:23,604 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr437REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-03 04:58:23,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:58:23,604 INFO L85 PathProgramCache]: Analyzing trace with hash -637866953, now seen corresponding path program 1 times [2021-11-03 04:58:23,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:58:23,605 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1182177456] [2021-11-03 04:58:23,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:58:23,605 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:58:23,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:58:23,606 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:58:23,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-03 04:58:24,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:58:24,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:58:24,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:58:24,586 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 04:58:24,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:58:24,975 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 04:58:24,975 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:58:24,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1182177456] [2021-11-03 04:58:24,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1182177456] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:58:24,975 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:58:24,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 04:58:24,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507817978] [2021-11-03 04:58:24,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:58:24,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:58:24,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:58:24,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:58:24,977 INFO L87 Difference]: Start difference. First operand 2997 states and 3884 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:58:25,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:58:25,111 INFO L93 Difference]: Finished difference Result 4348 states and 5450 transitions. [2021-11-03 04:58:25,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:58:25,114 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-03 04:58:25,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:58:25,117 INFO L225 Difference]: With dead ends: 4348 [2021-11-03 04:58:25,117 INFO L226 Difference]: Without dead ends: 4348 [2021-11-03 04:58:25,118 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:58:25,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4348 states. [2021-11-03 04:58:25,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4348 to 3765. [2021-11-03 04:58:25,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3765 states, 2921 states have (on average 1.7740499828825744) internal successors, (5182), 3764 states have internal predecessors, (5182), 0 states have call successors, (0), 0 states 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 04:58:25,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3765 states to 3765 states and 5182 transitions. [2021-11-03 04:58:25,160 INFO L78 Accepts]: Start accepts. Automaton has 3765 states and 5182 transitions. Word has length 59 [2021-11-03 04:58:25,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:58:25,160 INFO L470 AbstractCegarLoop]: Abstraction has 3765 states and 5182 transitions. [2021-11-03 04:58:25,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:58:25,161 INFO L276 IsEmpty]: Start isEmpty. Operand 3765 states and 5182 transitions. [2021-11-03 04:58:25,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-03 04:58:25,161 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:58:25,162 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] [2021-11-03 04:58:25,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-03 04:58:25,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:58:25,376 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr391REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-03 04:58:25,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:58:25,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1882812110, now seen corresponding path program 1 times [2021-11-03 04:58:25,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:58:25,376 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [567954464] [2021-11-03 04:58:25,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:58:25,377 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:58:25,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:58:25,377 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:58:25,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-03 04:58:26,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:58:26,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 04:58:26,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:58:26,118 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 04:58:26,126 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 04:58:26,803 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-03 04:58:26,803 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 29 treesize of output 31 [2021-11-03 04:58:26,808 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-03 04:58:26,808 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 28 treesize of output 24 [2021-11-03 04:58:26,850 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 04:58:26,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:58:31,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:58:31,906 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:58:31,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [567954464] [2021-11-03 04:58:31,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [567954464] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:58:31,907 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:58:31,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-03 04:58:31,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059448409] [2021-11-03 04:58:31,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:58:31,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:58:31,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:58:31,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=16, Unknown=1, NotChecked=0, Total=30 [2021-11-03 04:58:31,908 INFO L87 Difference]: Start difference. First operand 3765 states and 5182 transitions. Second operand has 6 states, 5 states have (on average 24.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:59:02,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:59:02,077 INFO L93 Difference]: Finished difference Result 6990 states and 9595 transitions. [2021-11-03 04:59:02,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:59:02,078 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 24.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-03 04:59:02,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:59:02,084 INFO L225 Difference]: With dead ends: 6990 [2021-11-03 04:59:02,084 INFO L226 Difference]: Without dead ends: 6990 [2021-11-03 04:59:02,084 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=26, Invalid=28, Unknown=2, NotChecked=0, Total=56 [2021-11-03 04:59:02,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6990 states. [2021-11-03 04:59:02,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6990 to 3709. [2021-11-03 04:59:02,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3709 states, 2929 states have (on average 1.7214066234209628) internal successors, (5042), 3708 states have internal predecessors, (5042), 0 states have call successors, (0), 0 states 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 04:59:02,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3709 states to 3709 states and 5042 transitions. [2021-11-03 04:59:02,136 INFO L78 Accepts]: Start accepts. Automaton has 3709 states and 5042 transitions. Word has length 62 [2021-11-03 04:59:02,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:59:02,137 INFO L470 AbstractCegarLoop]: Abstraction has 3709 states and 5042 transitions. [2021-11-03 04:59:02,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 24.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:59:02,137 INFO L276 IsEmpty]: Start isEmpty. Operand 3709 states and 5042 transitions. [2021-11-03 04:59:02,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-03 04:59:02,138 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:59:02,138 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:59:02,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-03 04:59:02,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:59:02,353 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr396ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-03 04:59:02,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:59:02,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1203198829, now seen corresponding path program 1 times [2021-11-03 04:59:02,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:59:02,354 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1251990544] [2021-11-03 04:59:02,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:59:02,354 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:59:02,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:59:02,355 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:59:02,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-03 04:59:03,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:59:03,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:59:03,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:59:03,156 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 04:59:03,170 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 23 treesize of output 19 [2021-11-03 04:59:03,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-03 04:59:03,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:59:03,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:59:03,375 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 04:59:03,375 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:59:03,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1251990544] [2021-11-03 04:59:03,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1251990544] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:59:03,375 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:59:03,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-03 04:59:03,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018511937] [2021-11-03 04:59:03,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:59:03,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:59:03,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:59:03,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:59:03,376 INFO L87 Difference]: Start difference. First operand 3709 states and 5042 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:59:13,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:59:13,392 INFO L93 Difference]: Finished difference Result 6077 states and 8227 transitions. [2021-11-03 04:59:13,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-03 04:59:13,393 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-03 04:59:13,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:59:13,397 INFO L225 Difference]: With dead ends: 6077 [2021-11-03 04:59:13,398 INFO L226 Difference]: Without dead ends: 6077 [2021-11-03 04:59:13,398 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-11-03 04:59:13,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6077 states. [2021-11-03 04:59:13,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6077 to 3708. [2021-11-03 04:59:13,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3708 states, 2929 states have (on average 1.7203823830658929) internal successors, (5039), 3707 states have internal predecessors, (5039), 0 states have call successors, (0), 0 states 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 04:59:13,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3708 states to 3708 states and 5039 transitions. [2021-11-03 04:59:13,456 INFO L78 Accepts]: Start accepts. Automaton has 3708 states and 5039 transitions. Word has length 68 [2021-11-03 04:59:13,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:59:13,457 INFO L470 AbstractCegarLoop]: Abstraction has 3708 states and 5039 transitions. [2021-11-03 04:59:13,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:59:13,457 INFO L276 IsEmpty]: Start isEmpty. Operand 3708 states and 5039 transitions. [2021-11-03 04:59:13,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-03 04:59:13,458 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:59:13,458 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:59:13,477 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-03 04:59:13,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:59:13,673 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr78ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-03 04:59:13,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:59:13,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1028979469, now seen corresponding path program 1 times [2021-11-03 04:59:13,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:59:13,674 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1080622355] [2021-11-03 04:59:13,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:59:13,674 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:59:13,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:59:13,675 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:59:13,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-03 04:59:14,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:59:14,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:59:14,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:59:14,499 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 04:59:14,512 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 04:59:14,548 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 04:59:14,597 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 04:59:14,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:59:14,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:59:14,733 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:59:14,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1080622355] [2021-11-03 04:59:14,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1080622355] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:59:14,733 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:59:14,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-03 04:59:14,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438466040] [2021-11-03 04:59:14,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:59:14,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:59:14,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:59:14,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:59:14,734 INFO L87 Difference]: Start difference. First operand 3708 states and 5039 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:59:24,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:59:24,781 INFO L93 Difference]: Finished difference Result 6069 states and 8213 transitions. [2021-11-03 04:59:24,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-03 04:59:24,782 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-03 04:59:24,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:59:24,789 INFO L225 Difference]: With dead ends: 6069 [2021-11-03 04:59:24,789 INFO L226 Difference]: Without dead ends: 6069 [2021-11-03 04:59:24,790 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-11-03 04:59:24,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6069 states. [2021-11-03 04:59:24,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6069 to 3707. [2021-11-03 04:59:24,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3707 states, 2929 states have (on average 1.7196995561625128) internal successors, (5037), 3706 states have internal predecessors, (5037), 0 states have call successors, (0), 0 states 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 04:59:24,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3707 states to 3707 states and 5037 transitions. [2021-11-03 04:59:24,840 INFO L78 Accepts]: Start accepts. Automaton has 3707 states and 5037 transitions. Word has length 68 [2021-11-03 04:59:24,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:59:24,840 INFO L470 AbstractCegarLoop]: Abstraction has 3707 states and 5037 transitions. [2021-11-03 04:59:24,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:59:24,841 INFO L276 IsEmpty]: Start isEmpty. Operand 3707 states and 5037 transitions. [2021-11-03 04:59:24,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-03 04:59:24,843 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:59:24,843 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:59:24,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-03 04:59:25,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:59:25,058 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr397ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-03 04:59:25,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:59:25,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1355543210, now seen corresponding path program 1 times [2021-11-03 04:59:25,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:59:25,059 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2100688830] [2021-11-03 04:59:25,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:59:25,059 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:59:25,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:59:25,060 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:59:25,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-03 04:59:25,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:59:25,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-03 04:59:25,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:59:25,922 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 04:59:25,943 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 04:59:25,952 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 04:59:26,018 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 04:59:26,021 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 04:59:26,098 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 04:59:26,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:59:26,603 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 04:59:26,603 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:59:26,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2100688830] [2021-11-03 04:59:26,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2100688830] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:59:26,603 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:59:26,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-03 04:59:26,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856491346] [2021-11-03 04:59:26,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 04:59:26,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:59:26,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 04:59:26,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:59:26,605 INFO L87 Difference]: Start difference. First operand 3707 states and 5037 transitions. Second operand has 10 states, 9 states have (on average 8.666666666666666) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states 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 05:00:01,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:00:01,146 INFO L93 Difference]: Finished difference Result 5559 states and 7494 transitions. [2021-11-03 05:00:01,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-03 05:00:01,147 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 8.666666666666666) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-03 05:00:01,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:00:01,152 INFO L225 Difference]: With dead ends: 5559 [2021-11-03 05:00:01,152 INFO L226 Difference]: Without dead ends: 5559 [2021-11-03 05:00:01,153 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-11-03 05:00:01,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5559 states. [2021-11-03 05:00:01,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5559 to 3706. [2021-11-03 05:00:01,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3706 states, 2929 states have (on average 1.7186753158074428) internal successors, (5034), 3705 states have internal predecessors, (5034), 0 states have call successors, (0), 0 states 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 05:00:01,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3706 states to 3706 states and 5034 transitions. [2021-11-03 05:00:01,221 INFO L78 Accepts]: Start accepts. Automaton has 3706 states and 5034 transitions. Word has length 69 [2021-11-03 05:00:01,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:00:01,222 INFO L470 AbstractCegarLoop]: Abstraction has 3706 states and 5034 transitions. [2021-11-03 05:00:01,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 8.666666666666666) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states 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 05:00:01,222 INFO L276 IsEmpty]: Start isEmpty. Operand 3706 states and 5034 transitions. [2021-11-03 05:00:01,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-03 05:00:01,222 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:00:01,223 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:00:01,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-03 05:00:01,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:00:01,423 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr79ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-03 05:00:01,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:00:01,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1833592125, now seen corresponding path program 1 times [2021-11-03 05:00:01,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:00:01,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [208783049] [2021-11-03 05:00:01,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:00:01,425 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:00:01,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:00:01,426 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:00:01,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-03 05:00:02,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:00:02,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-03 05:00:02,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:00:02,343 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 05:00:02,366 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 05:00:02,376 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 05:00:02,446 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 05:00:02,449 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 05:00:02,539 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 05:00:02,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:00:03,055 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 05:00:03,056 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:00:03,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [208783049] [2021-11-03 05:00:03,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [208783049] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:00:03,056 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:00:03,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-03 05:00:03,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563913232] [2021-11-03 05:00:03,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 05:00:03,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:00:03,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 05:00:03,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-03 05:00:03,057 INFO L87 Difference]: Start difference. First operand 3706 states and 5034 transitions. Second operand has 10 states, 9 states have (on average 8.666666666666666) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states 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 05:00:40,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:00:40,829 INFO L93 Difference]: Finished difference Result 5554 states and 7485 transitions. [2021-11-03 05:00:40,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-03 05:00:40,830 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 8.666666666666666) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-03 05:00:40,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:00:40,834 INFO L225 Difference]: With dead ends: 5554 [2021-11-03 05:00:40,834 INFO L226 Difference]: Without dead ends: 5554 [2021-11-03 05:00:40,834 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-11-03 05:00:40,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5554 states. [2021-11-03 05:00:40,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5554 to 3705. [2021-11-03 05:00:40,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3705 states, 2929 states have (on average 1.7179924889040628) internal successors, (5032), 3704 states have internal predecessors, (5032), 0 states have call successors, (0), 0 states 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 05:00:40,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3705 states to 3705 states and 5032 transitions. [2021-11-03 05:00:40,881 INFO L78 Accepts]: Start accepts. Automaton has 3705 states and 5032 transitions. Word has length 69 [2021-11-03 05:00:40,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:00:40,881 INFO L470 AbstractCegarLoop]: Abstraction has 3705 states and 5032 transitions. [2021-11-03 05:00:40,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 8.666666666666666) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states 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 05:00:40,881 INFO L276 IsEmpty]: Start isEmpty. Operand 3705 states and 5032 transitions. [2021-11-03 05:00:40,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-03 05:00:40,882 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:00:40,882 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 05:00:40,901 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-03 05:00:41,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:00:41,098 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr400REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-03 05:00:41,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:00:41,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1361720913, now seen corresponding path program 1 times [2021-11-03 05:00:41,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:00:41,099 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1302561576] [2021-11-03 05:00:41,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:00:41,100 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:00:41,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:00:41,102 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:00:41,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-03 05:00:41,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:00:41,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:00:41,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:00:42,138 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 05:00:42,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:00:42,267 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 05:00:42,267 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:00:42,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1302561576] [2021-11-03 05:00:42,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1302561576] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:00:42,268 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:00:42,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 05:00:42,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463722126] [2021-11-03 05:00:42,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:00:42,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:00:42,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:00:42,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:00:42,269 INFO L87 Difference]: Start difference. First operand 3705 states and 5032 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states 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 05:00:42,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:00:42,554 INFO L93 Difference]: Finished difference Result 6082 states and 8217 transitions. [2021-11-03 05:00:42,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 05:00:42,555 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 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 05:00:42,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:00:42,561 INFO L225 Difference]: With dead ends: 6082 [2021-11-03 05:00:42,561 INFO L226 Difference]: Without dead ends: 6082 [2021-11-03 05:00:42,561 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:00:42,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6082 states. [2021-11-03 05:00:42,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6082 to 3720. [2021-11-03 05:00:42,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3720 states, 2944 states have (on average 1.7143342391304348) internal successors, (5047), 3719 states have internal predecessors, (5047), 0 states have call successors, (0), 0 states 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 05:00:42,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3720 states to 3720 states and 5047 transitions. [2021-11-03 05:00:42,617 INFO L78 Accepts]: Start accepts. Automaton has 3720 states and 5047 transitions. Word has length 73 [2021-11-03 05:00:42,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:00:42,617 INFO L470 AbstractCegarLoop]: Abstraction has 3720 states and 5047 transitions. [2021-11-03 05:00:42,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states 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 05:00:42,618 INFO L276 IsEmpty]: Start isEmpty. Operand 3720 states and 5047 transitions. [2021-11-03 05:00:42,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-03 05:00:42,619 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:00:42,619 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] [2021-11-03 05:00:42,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-03 05:00:42,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:00:42,833 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr400REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-03 05:00:42,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:00:42,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1412235279, now seen corresponding path program 1 times [2021-11-03 05:00:42,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:00:42,834 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2095567853] [2021-11-03 05:00:42,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:00:42,834 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:00:42,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:00:42,835 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:00:42,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-03 05:00:43,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:00:43,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:00:43,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:00:44,002 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 05:00:44,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:00:44,305 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 05:00:44,306 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:00:44,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2095567853] [2021-11-03 05:00:44,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2095567853] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:00:44,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [366525577] [2021-11-03 05:00:44,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:00:44,307 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:00:44,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:00:44,309 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:00:44,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2021-11-03 05:00:45,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:00:45,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:00:45,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:00:45,762 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 05:00:45,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:00:45,941 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 05:00:45,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [366525577] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:00:45,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896119489] [2021-11-03 05:00:45,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:00:45,942 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:00:45,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:00:45,944 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:00:45,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-03 05:00:47,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:00:47,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:00:47,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:00:47,306 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 05:00:47,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:00:47,429 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 05:00:47,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896119489] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:00:47,430 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 05:00:47,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 10 [2021-11-03 05:00:47,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398884831] [2021-11-03 05:00:47,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 05:00:47,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:00:47,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 05:00:47,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-03 05:00:47,431 INFO L87 Difference]: Start difference. First operand 3720 states and 5047 transitions. Second operand has 10 states, 10 states have (on average 8.1) internal successors, (81), 10 states have internal predecessors, (81), 0 states have call successors, (0), 0 states 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 05:00:48,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:00:48,264 INFO L93 Difference]: Finished difference Result 6112 states and 8247 transitions. [2021-11-03 05:00:48,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 05:00:48,276 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 8.1) internal successors, (81), 10 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-03 05:00:48,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:00:48,280 INFO L225 Difference]: With dead ends: 6112 [2021-11-03 05:00:48,280 INFO L226 Difference]: Without dead ends: 6112 [2021-11-03 05:00:48,280 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 436 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2021-11-03 05:00:48,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6112 states. [2021-11-03 05:00:48,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6112 to 3750. [2021-11-03 05:00:48,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3750 states, 2974 states have (on average 1.707128446536651) internal successors, (5077), 3749 states have internal predecessors, (5077), 0 states have call successors, (0), 0 states 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 05:00:48,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3750 states to 3750 states and 5077 transitions. [2021-11-03 05:00:48,332 INFO L78 Accepts]: Start accepts. Automaton has 3750 states and 5077 transitions. Word has length 75 [2021-11-03 05:00:48,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:00:48,332 INFO L470 AbstractCegarLoop]: Abstraction has 3750 states and 5077 transitions. [2021-11-03 05:00:48,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.1) internal successors, (81), 10 states have internal predecessors, (81), 0 states have call successors, (0), 0 states 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 05:00:48,333 INFO L276 IsEmpty]: Start isEmpty. Operand 3750 states and 5077 transitions. [2021-11-03 05:00:48,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-03 05:00:48,333 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:00:48,334 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] [2021-11-03 05:00:48,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-03 05:00:48,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-03 05:00:48,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2021-11-03 05:00:48,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 05:00:48,948 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr400REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-03 05:00:48,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:00:48,949 INFO L85 PathProgramCache]: Analyzing trace with hash -547693775, now seen corresponding path program 2 times [2021-11-03 05:00:48,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:00:48,950 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1433820281] [2021-11-03 05:00:48,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 05:00:48,950 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:00:48,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:00:48,951 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:00:48,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb051639-116f-46a5-bf8d-010292a418c3/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-03 05:00:50,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-03 05:00:50,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 05:00:50,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:00:50,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:00:50,132 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 05:00:50,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:00:50,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:00:50,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:00:50,225 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-03 05:00:50,225 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 05:00:50,337 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-03 05:00:50,338 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 05:00:50,600 INFO L354 Elim1Store]: treesize reduction 229, result has 11.2 percent of original size [2021-11-03 05:00:50,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 66 treesize of output 86 [2021-11-03 05:00:56,449 INFO L354 Elim1Store]: treesize reduction 1963, result has 5.1 percent of original size [2021-11-03 05:00:56,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 39 case distinctions, treesize of input 118 treesize of output 150 [2021-11-03 05:01:06,618 INFO L354 Elim1Store]: treesize reduction 876, result has 0.1 percent of original size [2021-11-03 05:01:06,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 157 treesize of output 67 [2021-11-03 05:01:06,828 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-03 05:01:06,829 INFO L328 TraceCheckSpWp]: Computing backward predicates...