./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-node-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-node-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh --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 514e162b13bdcbe99106b4f79e5a61b8afdae9b478788e06b35106cd952df62f --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 05:41:45,462 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 05:41:45,464 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 05:41:45,479 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 05:41:45,479 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 05:41:45,480 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 05:41:45,481 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 05:41:45,483 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 05:41:45,486 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 05:41:45,487 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 05:41:45,488 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 05:41:45,490 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 05:41:45,490 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 05:41:45,492 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 05:41:45,493 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 05:41:45,495 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 05:41:45,496 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 05:41:45,497 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 05:41:45,500 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 05:41:45,503 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 05:41:45,505 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 05:41:45,507 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 05:41:45,509 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 05:41:45,510 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 05:41:45,516 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 05:41:45,516 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 05:41:45,517 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 05:41:45,518 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 05:41:45,519 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 05:41:45,520 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 05:41:45,521 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 05:41:45,522 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 05:41:45,522 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 05:41:45,523 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 05:41:45,524 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 05:41:45,524 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 05:41:45,525 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 05:41:45,525 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 05:41:45,525 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 05:41:45,526 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 05:41:45,527 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 05:41:45,528 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-12-14 05:41:45,561 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 05:41:45,562 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 05:41:45,562 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 05:41:45,562 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 05:41:45,563 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 05:41:45,563 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 05:41:45,563 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 05:41:45,563 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 05:41:45,564 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 05:41:45,564 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 05:41:45,564 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 05:41:45,564 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 05:41:45,564 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 05:41:45,564 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 05:41:45,564 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 05:41:45,565 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 05:41:45,565 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 05:41:45,565 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 05:41:45,566 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 05:41:45,566 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 05:41:45,566 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 05:41:45,566 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 05:41:45,566 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 05:41:45,566 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 05:41:45,567 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 05:41:45,567 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 05:41:45,567 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 05:41:45,567 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 05:41:45,567 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 05:41:45,567 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 05:41:45,568 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 05:41:45,568 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 05:41:45,568 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 05:41:45,568 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 05:41:45,568 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 05:41:45,568 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 05:41:45,569 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 05:41:45,569 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 05:41:45,569 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 05:41:45,569 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 05:41:45,569 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 05:41:45,569 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 05:41:45,569 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 514e162b13bdcbe99106b4f79e5a61b8afdae9b478788e06b35106cd952df62f [2022-12-14 05:41:45,736 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 05:41:45,752 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 05:41:45,754 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 05:41:45,755 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 05:41:45,755 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 05:41:45,756 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/weaver/chl-node-symm.wvr.c [2022-12-14 05:41:48,344 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 05:41:48,492 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 05:41:48,492 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/sv-benchmarks/c/weaver/chl-node-symm.wvr.c [2022-12-14 05:41:48,498 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/data/61b702ce2/68f84d4268a24e9b862fd52e90bc8a70/FLAG48c01d835 [2022-12-14 05:41:48,901 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/data/61b702ce2/68f84d4268a24e9b862fd52e90bc8a70 [2022-12-14 05:41:48,903 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 05:41:48,904 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 05:41:48,905 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 05:41:48,905 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 05:41:48,908 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 05:41:48,909 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:41:48" (1/1) ... [2022-12-14 05:41:48,910 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e801985 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:41:48, skipping insertion in model container [2022-12-14 05:41:48,910 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:41:48" (1/1) ... [2022-12-14 05:41:48,915 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 05:41:48,928 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 05:41:49,043 WARN L237 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_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/sv-benchmarks/c/weaver/chl-node-symm.wvr.c[3305,3318] [2022-12-14 05:41:49,053 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 05:41:49,061 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-12-14 05:41:49,062 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@57ee7d5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:41:49, skipping insertion in model container [2022-12-14 05:41:49,062 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 05:41:49,062 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-12-14 05:41:49,064 INFO L158 Benchmark]: Toolchain (without parser) took 159.08ms. Allocated memory is still 155.2MB. Free memory was 126.8MB in the beginning and 116.4MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 05:41:49,064 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 102.8MB. Free memory was 69.5MB in the beginning and 69.5MB in the end (delta: 68.3kB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 05:41:49,064 INFO L158 Benchmark]: CACSL2BoogieTranslator took 157.28ms. Allocated memory is still 155.2MB. Free memory was 126.8MB in the beginning and 116.4MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 05:41:49,065 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 102.8MB. Free memory was 69.5MB in the beginning and 69.5MB in the end (delta: 68.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 157.28ms. Allocated memory is still 155.2MB. Free memory was 126.8MB in the beginning and 116.4MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 102]: Unsupported Syntax Found a cast between two array/pointer types of different sizes 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/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-node-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh --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 514e162b13bdcbe99106b4f79e5a61b8afdae9b478788e06b35106cd952df62f --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 05:41:50,526 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 05:41:50,528 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 05:41:50,553 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 05:41:50,553 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 05:41:50,554 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 05:41:50,556 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 05:41:50,557 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 05:41:50,559 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 05:41:50,560 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 05:41:50,561 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 05:41:50,562 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 05:41:50,563 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 05:41:50,564 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 05:41:50,565 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 05:41:50,566 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 05:41:50,567 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 05:41:50,568 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 05:41:50,569 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 05:41:50,571 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 05:41:50,573 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 05:41:50,574 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 05:41:50,575 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 05:41:50,576 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 05:41:50,580 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 05:41:50,580 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 05:41:50,580 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 05:41:50,581 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 05:41:50,582 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 05:41:50,583 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 05:41:50,583 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 05:41:50,584 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 05:41:50,585 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 05:41:50,585 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 05:41:50,587 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 05:41:50,587 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 05:41:50,587 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 05:41:50,587 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 05:41:50,588 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 05:41:50,588 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 05:41:50,589 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 05:41:50,589 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-12-14 05:41:50,612 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 05:41:50,612 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 05:41:50,613 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 05:41:50,613 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 05:41:50,613 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 05:41:50,614 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 05:41:50,614 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 05:41:50,614 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 05:41:50,614 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 05:41:50,614 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 05:41:50,615 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 05:41:50,615 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 05:41:50,615 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 05:41:50,616 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 05:41:50,616 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 05:41:50,616 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 05:41:50,616 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 05:41:50,616 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 05:41:50,616 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 05:41:50,616 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 05:41:50,617 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 05:41:50,617 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 05:41:50,617 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 05:41:50,617 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 05:41:50,617 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 05:41:50,617 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-14 05:41:50,617 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-14 05:41:50,617 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 05:41:50,618 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 05:41:50,618 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 05:41:50,618 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-14 05:41:50,618 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 05:41:50,618 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 05:41:50,618 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 05:41:50,618 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 05:41:50,619 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-12-14 05:41:50,619 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-14 05:41:50,619 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 05:41:50,619 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-14 05:41:50,619 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_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 514e162b13bdcbe99106b4f79e5a61b8afdae9b478788e06b35106cd952df62f [2022-12-14 05:41:50,870 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 05:41:50,887 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 05:41:50,889 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 05:41:50,890 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 05:41:50,890 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 05:41:50,891 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/weaver/chl-node-symm.wvr.c [2022-12-14 05:41:53,473 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 05:41:53,639 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 05:41:53,639 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/sv-benchmarks/c/weaver/chl-node-symm.wvr.c [2022-12-14 05:41:53,646 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/data/295407a51/79eb49e5a6da4801a1e1419f861db8ae/FLAG20c3c2425 [2022-12-14 05:41:53,658 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/data/295407a51/79eb49e5a6da4801a1e1419f861db8ae [2022-12-14 05:41:53,660 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 05:41:53,661 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 05:41:53,662 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 05:41:53,662 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 05:41:53,665 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 05:41:53,666 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:41:53" (1/1) ... [2022-12-14 05:41:53,667 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@316ba2dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:41:53, skipping insertion in model container [2022-12-14 05:41:53,667 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:41:53" (1/1) ... [2022-12-14 05:41:53,672 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 05:41:53,691 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 05:41:53,835 WARN L237 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_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/sv-benchmarks/c/weaver/chl-node-symm.wvr.c[3305,3318] [2022-12-14 05:41:53,852 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 05:41:53,865 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-12-14 05:41:53,870 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 05:41:53,887 WARN L237 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_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/sv-benchmarks/c/weaver/chl-node-symm.wvr.c[3305,3318] [2022-12-14 05:41:53,894 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 05:41:53,900 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 05:41:53,921 WARN L237 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_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/sv-benchmarks/c/weaver/chl-node-symm.wvr.c[3305,3318] [2022-12-14 05:41:53,928 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 05:41:53,942 INFO L208 MainTranslator]: Completed translation [2022-12-14 05:41:53,943 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:41:53 WrapperNode [2022-12-14 05:41:53,943 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 05:41:53,944 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 05:41:53,944 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 05:41:53,944 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 05:41:53,949 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:41:53" (1/1) ... [2022-12-14 05:41:53,960 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:41:53" (1/1) ... [2022-12-14 05:41:53,990 INFO L138 Inliner]: procedures = 28, calls = 50, calls flagged for inlining = 18, calls inlined = 24, statements flattened = 270 [2022-12-14 05:41:53,990 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 05:41:53,991 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 05:41:53,991 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 05:41:53,991 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 05:41:54,000 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:41:53" (1/1) ... [2022-12-14 05:41:54,000 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:41:53" (1/1) ... [2022-12-14 05:41:54,006 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:41:53" (1/1) ... [2022-12-14 05:41:54,006 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:41:53" (1/1) ... [2022-12-14 05:41:54,025 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:41:53" (1/1) ... [2022-12-14 05:41:54,030 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:41:53" (1/1) ... [2022-12-14 05:41:54,032 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:41:53" (1/1) ... [2022-12-14 05:41:54,034 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:41:53" (1/1) ... [2022-12-14 05:41:54,037 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 05:41:54,038 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 05:41:54,038 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 05:41:54,038 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 05:41:54,039 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:41:53" (1/1) ... [2022-12-14 05:41:54,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 05:41:54,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:41:54,070 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 05:41:54,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 05:41:54,104 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 05:41:54,104 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-12-14 05:41:54,104 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-14 05:41:54,104 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 05:41:54,104 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-12-14 05:41:54,104 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-14 05:41:54,104 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-14 05:41:54,104 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-14 05:41:54,105 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-14 05:41:54,105 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 05:41:54,105 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 05:41:54,105 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 05:41:54,105 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2022-12-14 05:41:54,105 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 05:41:54,105 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-12-14 05:41:54,107 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-14 05:41:54,202 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 05:41:54,204 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 05:41:54,841 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 05:41:54,852 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 05:41:54,852 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-14 05:41:54,855 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:41:54 BoogieIcfgContainer [2022-12-14 05:41:54,855 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 05:41:54,857 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 05:41:54,857 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 05:41:54,859 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 05:41:54,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 05:41:53" (1/3) ... [2022-12-14 05:41:54,860 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55a7f076 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:41:54, skipping insertion in model container [2022-12-14 05:41:54,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:41:53" (2/3) ... [2022-12-14 05:41:54,860 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55a7f076 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:41:54, skipping insertion in model container [2022-12-14 05:41:54,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:41:54" (3/3) ... [2022-12-14 05:41:54,862 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-node-symm.wvr.c [2022-12-14 05:41:54,875 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 05:41:54,875 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 42 error locations. [2022-12-14 05:41:54,875 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-14 05:41:54,969 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-14 05:41:55,001 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 05:41:55,015 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 385 places, 406 transitions, 828 flow [2022-12-14 05:41:55,017 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 385 places, 406 transitions, 828 flow [2022-12-14 05:41:55,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 385 places, 406 transitions, 828 flow [2022-12-14 05:41:55,158 INFO L130 PetriNetUnfolder]: 28/404 cut-off events. [2022-12-14 05:41:55,158 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-14 05:41:55,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 413 conditions, 404 events. 28/404 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 585 event pairs, 0 based on Foata normal form. 0/334 useless extension candidates. Maximal degree in co-relation 307. Up to 2 conditions per place. [2022-12-14 05:41:55,178 INFO L119 LiptonReduction]: Number of co-enabled transitions 11440 [2022-12-14 05:42:41,437 INFO L134 LiptonReduction]: Checked pairs total: 15533 [2022-12-14 05:42:41,438 INFO L136 LiptonReduction]: Total number of compositions: 481 [2022-12-14 05:42:41,444 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 71 places, 70 transitions, 156 flow [2022-12-14 05:42:41,484 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1215 states, 645 states have (on average 4.950387596899224) internal successors, (3193), 1214 states have internal predecessors, (3193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:42:41,497 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 05:42:41,501 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4f075be5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 05:42:41,501 INFO L358 AbstractCegarLoop]: Starting to check reachability of 68 error locations. [2022-12-14 05:42:41,504 INFO L276 IsEmpty]: Start isEmpty. Operand has 1215 states, 645 states have (on average 4.950387596899224) internal successors, (3193), 1214 states have internal predecessors, (3193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:42:41,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 05:42:41,508 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:42:41,508 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 05:42:41,508 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-12-14 05:42:41,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:42:41,512 INFO L85 PathProgramCache]: Analyzing trace with hash 50097, now seen corresponding path program 1 times [2022-12-14 05:42:41,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:42:41,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [216569944] [2022-12-14 05:42:41,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:42:41,521 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:42:41,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:42:41,556 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:42:41,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-12-14 05:42:41,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:42:41,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 05:42:41,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:42:41,724 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-12-14 05:42:41,725 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-12-14 05:42:41,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:42:41,745 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:42:41,746 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:42:41,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [216569944] [2022-12-14 05:42:41,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [216569944] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:42:41,747 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:42:41,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 05:42:41,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54377401] [2022-12-14 05:42:41,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:42:41,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:42:41,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:42:41,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:42:41,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:42:41,777 INFO L87 Difference]: Start difference. First operand has 1215 states, 645 states have (on average 4.950387596899224) internal successors, (3193), 1214 states have internal predecessors, (3193), 0 states have call successors, (0), 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 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:42:42,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:42:42,124 INFO L93 Difference]: Finished difference Result 892 states and 2306 transitions. [2022-12-14 05:42:42,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:42:42,126 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 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 2 [2022-12-14 05:42:42,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:42:42,138 INFO L225 Difference]: With dead ends: 892 [2022-12-14 05:42:42,139 INFO L226 Difference]: Without dead ends: 892 [2022-12-14 05:42:42,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:42:42,141 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 56 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 05:42:42,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 2 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 05:42:42,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 892 states. [2022-12-14 05:42:42,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 892 to 892. [2022-12-14 05:42:42,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 892 states, 489 states have (on average 4.715746421267894) internal successors, (2306), 891 states have internal predecessors, (2306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:42:42,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 2306 transitions. [2022-12-14 05:42:42,197 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 2306 transitions. Word has length 2 [2022-12-14 05:42:42,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:42:42,197 INFO L495 AbstractCegarLoop]: Abstraction has 892 states and 2306 transitions. [2022-12-14 05:42:42,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:42:42,198 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 2306 transitions. [2022-12-14 05:42:42,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 05:42:42,198 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:42:42,198 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 05:42:42,210 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-12-14 05:42:42,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:42:42,400 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-12-14 05:42:42,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:42:42,400 INFO L85 PathProgramCache]: Analyzing trace with hash 50098, now seen corresponding path program 1 times [2022-12-14 05:42:42,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:42:42,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [215498209] [2022-12-14 05:42:42,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:42:42,401 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:42:42,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:42:42,403 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:42:42,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-12-14 05:42:42,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:42:42,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 05:42:42,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:42:42,525 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 05:42:42,525 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 05:42:42,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:42:42,545 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:42:42,545 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:42:42,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [215498209] [2022-12-14 05:42:42,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [215498209] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:42:42,546 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:42:42,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 05:42:42,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853150971] [2022-12-14 05:42:42,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:42:42,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:42:42,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:42:42,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:42:42,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:42:42,547 INFO L87 Difference]: Start difference. First operand 892 states and 2306 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:42:42,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:42:42,934 INFO L93 Difference]: Finished difference Result 894 states and 2310 transitions. [2022-12-14 05:42:42,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:42:42,934 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 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 2 [2022-12-14 05:42:42,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:42:42,943 INFO L225 Difference]: With dead ends: 894 [2022-12-14 05:42:42,943 INFO L226 Difference]: Without dead ends: 894 [2022-12-14 05:42:42,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:42:42,944 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 05:42:42,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 05:42:42,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 894 states. [2022-12-14 05:42:42,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 894 to 894. [2022-12-14 05:42:42,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 894 states, 491 states have (on average 4.704684317718941) internal successors, (2310), 893 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:42:42,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894 states to 894 states and 2310 transitions. [2022-12-14 05:42:42,965 INFO L78 Accepts]: Start accepts. Automaton has 894 states and 2310 transitions. Word has length 2 [2022-12-14 05:42:42,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:42:42,965 INFO L495 AbstractCegarLoop]: Abstraction has 894 states and 2310 transitions. [2022-12-14 05:42:42,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:42:42,965 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states and 2310 transitions. [2022-12-14 05:42:42,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 05:42:42,966 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:42:42,966 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 05:42:42,976 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-12-14 05:42:43,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:42:43,168 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-12-14 05:42:43,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:42:43,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1560604, now seen corresponding path program 1 times [2022-12-14 05:42:43,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:42:43,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1511386707] [2022-12-14 05:42:43,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:42:43,172 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:42:43,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:42:43,175 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:42:43,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-12-14 05:42:43,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:42:43,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 05:42:43,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:42:43,406 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 05:42:43,407 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 05:42:43,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:42:43,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:42:43,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:42:43,639 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:42:43,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1511386707] [2022-12-14 05:42:43,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1511386707] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:42:43,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1857295006] [2022-12-14 05:42:43,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:42:43,640 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 05:42:43,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 05:42:43,641 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 05:42:43,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2022-12-14 05:42:43,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:42:43,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 05:42:43,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:42:43,794 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 05:42:43,794 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 05:42:43,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:42:43,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:42:43,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:42:43,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1857295006] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:42:43,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493237002] [2022-12-14 05:42:43,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:42:43,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:42:43,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:42:43,897 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:42:43,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 05:42:43,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:42:43,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 05:42:43,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:42:44,013 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 05:42:44,013 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 05:42:44,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:42:44,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:42:44,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:42:44,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493237002] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:42:44,173 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 05:42:44,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 2, 2] total 6 [2022-12-14 05:42:44,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488399436] [2022-12-14 05:42:44,173 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 05:42:44,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 05:42:44,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:42:44,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 05:42:44,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-12-14 05:42:44,174 INFO L87 Difference]: Start difference. First operand 894 states and 2310 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:42:46,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:42:46,064 INFO L93 Difference]: Finished difference Result 903 states and 2326 transitions. [2022-12-14 05:42:46,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 05:42:46,065 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 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 [2022-12-14 05:42:46,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:42:46,068 INFO L225 Difference]: With dead ends: 903 [2022-12-14 05:42:46,068 INFO L226 Difference]: Without dead ends: 903 [2022-12-14 05:42:46,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-12-14 05:42:46,069 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 15 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-12-14 05:42:46,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 10 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-12-14 05:42:46,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 903 states. [2022-12-14 05:42:46,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 903 to 900. [2022-12-14 05:42:46,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 900 states, 497 states have (on average 4.6720321931589535) internal successors, (2322), 899 states have internal predecessors, (2322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:42:46,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 2322 transitions. [2022-12-14 05:42:46,087 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 2322 transitions. Word has length 3 [2022-12-14 05:42:46,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:42:46,087 INFO L495 AbstractCegarLoop]: Abstraction has 900 states and 2322 transitions. [2022-12-14 05:42:46,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:42:46,088 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 2322 transitions. [2022-12-14 05:42:46,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 05:42:46,088 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:42:46,088 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 05:42:46,094 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 05:42:46,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2022-12-14 05:42:46,502 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-12-14 05:42:46,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:42:46,692 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-12-14 05:42:46,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:42:46,693 INFO L85 PathProgramCache]: Analyzing trace with hash 48496883, now seen corresponding path program 1 times [2022-12-14 05:42:46,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:42:46,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1410175037] [2022-12-14 05:42:46,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:42:46,696 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:42:46,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:42:46,698 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:42:46,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-12-14 05:42:46,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:42:46,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 05:42:46,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:42:46,763 INFO L350 Elim1Store]: Elim1 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 7 [2022-12-14 05:42:46,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:42:46,767 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:42:46,767 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:42:46,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1410175037] [2022-12-14 05:42:46,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1410175037] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:42:46,767 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:42:46,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 05:42:46,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091590148] [2022-12-14 05:42:46,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:42:46,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:42:46,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:42:46,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:42:46,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:42:46,768 INFO L87 Difference]: Start difference. First operand 900 states and 2322 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:42:47,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:42:47,085 INFO L93 Difference]: Finished difference Result 898 states and 2320 transitions. [2022-12-14 05:42:47,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:42:47,086 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2022-12-14 05:42:47,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:42:47,089 INFO L225 Difference]: With dead ends: 898 [2022-12-14 05:42:47,089 INFO L226 Difference]: Without dead ends: 898 [2022-12-14 05:42:47,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:42:47,090 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 50 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 05:42:47,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 2 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 05:42:47,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2022-12-14 05:42:47,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 898. [2022-12-14 05:42:47,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 497 states have (on average 4.668008048289739) internal successors, (2320), 897 states have internal predecessors, (2320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:42:47,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 2320 transitions. [2022-12-14 05:42:47,107 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 2320 transitions. Word has length 4 [2022-12-14 05:42:47,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:42:47,107 INFO L495 AbstractCegarLoop]: Abstraction has 898 states and 2320 transitions. [2022-12-14 05:42:47,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:42:47,107 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 2320 transitions. [2022-12-14 05:42:47,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 05:42:47,108 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:42:47,108 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 05:42:47,119 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-12-14 05:42:47,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:42:47,309 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-12-14 05:42:47,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:42:47,309 INFO L85 PathProgramCache]: Analyzing trace with hash 48496884, now seen corresponding path program 1 times [2022-12-14 05:42:47,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:42:47,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [558334825] [2022-12-14 05:42:47,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:42:47,309 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:42:47,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:42:47,310 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:42:47,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-12-14 05:42:47,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:42:47,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 05:42:47,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:42:47,399 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 05:42:47,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:42:47,412 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:42:47,413 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:42:47,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [558334825] [2022-12-14 05:42:47,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [558334825] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:42:47,413 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:42:47,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 05:42:47,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366466537] [2022-12-14 05:42:47,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:42:47,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 05:42:47,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:42:47,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 05:42:47,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 05:42:47,414 INFO L87 Difference]: Start difference. First operand 898 states and 2320 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:42:47,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:42:47,810 INFO L93 Difference]: Finished difference Result 899 states and 2322 transitions. [2022-12-14 05:42:47,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 05:42:47,811 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2022-12-14 05:42:47,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:42:47,816 INFO L225 Difference]: With dead ends: 899 [2022-12-14 05:42:47,816 INFO L226 Difference]: Without dead ends: 899 [2022-12-14 05:42:47,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 05:42:47,817 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 58 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 05:42:47,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 5 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 05:42:47,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899 states. [2022-12-14 05:42:47,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899 to 899. [2022-12-14 05:42:47,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 498 states have (on average 4.662650602409639) internal successors, (2322), 898 states have internal predecessors, (2322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:42:47,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 2322 transitions. [2022-12-14 05:42:47,843 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 2322 transitions. Word has length 4 [2022-12-14 05:42:47,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:42:47,843 INFO L495 AbstractCegarLoop]: Abstraction has 899 states and 2322 transitions. [2022-12-14 05:42:47,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:42:47,843 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 2322 transitions. [2022-12-14 05:42:47,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 05:42:47,843 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:42:47,844 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 05:42:47,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-12-14 05:42:48,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:42:48,044 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-12-14 05:42:48,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:42:48,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1503418754, now seen corresponding path program 1 times [2022-12-14 05:42:48,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:42:48,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [235283399] [2022-12-14 05:42:48,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:42:48,045 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:42:48,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:42:48,046 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:42:48,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-12-14 05:42:48,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:42:48,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 05:42:48,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:42:48,133 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 05:42:48,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:42:48,147 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:42:48,147 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:42:48,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [235283399] [2022-12-14 05:42:48,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [235283399] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:42:48,147 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:42:48,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 05:42:48,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987969898] [2022-12-14 05:42:48,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:42:48,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 05:42:48,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:42:48,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 05:42:48,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 05:42:48,148 INFO L87 Difference]: Start difference. First operand 899 states and 2322 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) [2022-12-14 05:42:48,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:42:48,791 INFO L93 Difference]: Finished difference Result 1781 states and 4615 transitions. [2022-12-14 05:42:48,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 05:42:48,791 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 5 [2022-12-14 05:42:48,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:42:48,801 INFO L225 Difference]: With dead ends: 1781 [2022-12-14 05:42:48,801 INFO L226 Difference]: Without dead ends: 1781 [2022-12-14 05:42:48,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 05:42:48,802 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 146 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 05:42:48,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 4 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 05:42:48,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1781 states. [2022-12-14 05:42:48,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1781 to 900. [2022-12-14 05:42:48,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 900 states, 499 states have (on average 4.661322645290581) internal successors, (2326), 899 states have internal predecessors, (2326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:42:48,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 2326 transitions. [2022-12-14 05:42:48,820 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 2326 transitions. Word has length 5 [2022-12-14 05:42:48,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:42:48,820 INFO L495 AbstractCegarLoop]: Abstraction has 900 states and 2326 transitions. [2022-12-14 05:42:48,820 INFO L496 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) [2022-12-14 05:42:48,820 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 2326 transitions. [2022-12-14 05:42:48,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 05:42:48,820 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:42:48,821 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 05:42:48,832 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2022-12-14 05:42:49,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:42:49,023 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-12-14 05:42:49,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:42:49,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1503418962, now seen corresponding path program 1 times [2022-12-14 05:42:49,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:42:49,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2013273187] [2022-12-14 05:42:49,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:42:49,026 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:42:49,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:42:49,028 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:42:49,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-12-14 05:42:49,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:42:49,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 05:42:49,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:42:49,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:42:49,180 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:42:49,180 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:42:49,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2013273187] [2022-12-14 05:42:49,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2013273187] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:42:49,180 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:42:49,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 05:42:49,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798215100] [2022-12-14 05:42:49,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:42:49,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 05:42:49,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:42:49,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 05:42:49,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 05:42:49,182 INFO L87 Difference]: Start difference. First operand 900 states and 2326 transitions. Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:42:49,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:42:49,577 INFO L93 Difference]: Finished difference Result 900 states and 2324 transitions. [2022-12-14 05:42:49,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 05:42:49,578 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-12-14 05:42:49,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:42:49,581 INFO L225 Difference]: With dead ends: 900 [2022-12-14 05:42:49,581 INFO L226 Difference]: Without dead ends: 900 [2022-12-14 05:42:49,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 05:42:49,581 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 59 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 05:42:49,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 6 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 05:42:49,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 900 states. [2022-12-14 05:42:49,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 900 to 900. [2022-12-14 05:42:49,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 900 states, 499 states have (on average 4.657314629258517) internal successors, (2324), 899 states have internal predecessors, (2324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:42:49,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 2324 transitions. [2022-12-14 05:42:49,594 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 2324 transitions. Word has length 5 [2022-12-14 05:42:49,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:42:49,594 INFO L495 AbstractCegarLoop]: Abstraction has 900 states and 2324 transitions. [2022-12-14 05:42:49,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:42:49,594 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 2324 transitions. [2022-12-14 05:42:49,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 05:42:49,594 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:42:49,594 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-12-14 05:42:49,606 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2022-12-14 05:42:49,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:42:49,796 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-12-14 05:42:49,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:42:49,797 INFO L85 PathProgramCache]: Analyzing trace with hash -745173454, now seen corresponding path program 2 times [2022-12-14 05:42:49,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:42:49,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1297308190] [2022-12-14 05:42:49,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 05:42:49,799 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:42:49,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:42:49,802 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:42:49,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-12-14 05:42:49,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 05:42:49,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:42:50,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 05:42:50,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:42:50,041 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 05:42:50,042 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 05:42:50,135 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:42:50,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:42:50,672 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:42:50,673 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:42:50,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1297308190] [2022-12-14 05:42:50,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1297308190] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:42:50,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [629910649] [2022-12-14 05:42:50,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 05:42:50,673 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 05:42:50,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 05:42:50,674 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 05:42:50,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2022-12-14 05:42:50,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 05:42:50,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:42:50,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 05:42:50,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:42:50,863 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 05:42:50,863 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 05:42:50,952 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:42:50,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:42:51,675 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:42:51,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [629910649] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:42:51,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178581243] [2022-12-14 05:42:51,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 05:42:51,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:42:51,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:42:51,676 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:42:51,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 05:42:51,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 05:42:51,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:42:51,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 05:42:51,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:42:51,808 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 05:42:51,808 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 05:42:51,868 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:42:51,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:42:52,005 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:42:52,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178581243] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:42:52,006 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 05:42:52,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 15 [2022-12-14 05:42:52,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758223345] [2022-12-14 05:42:52,006 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 05:42:52,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 05:42:52,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:42:52,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 05:42:52,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2022-12-14 05:42:52,007 INFO L87 Difference]: Start difference. First operand 900 states and 2324 transitions. Second operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:42:55,336 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:42:56,395 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:42:57,404 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:42:59,432 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:43:01,251 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:43:03,254 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:43:05,180 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:43:06,428 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:43:07,767 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:43:08,870 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:43:12,078 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:43:14,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:43:14,326 INFO L93 Difference]: Finished difference Result 915 states and 2353 transitions. [2022-12-14 05:43:14,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 05:43:14,327 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 05:43:14,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:43:14,330 INFO L225 Difference]: With dead ends: 915 [2022-12-14 05:43:14,330 INFO L226 Difference]: Without dead ends: 915 [2022-12-14 05:43:14,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=182, Invalid=324, Unknown=0, NotChecked=0, Total=506 [2022-12-14 05:43:14,331 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 14 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 125 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.7s IncrementalHoareTripleChecker+Time [2022-12-14 05:43:14,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 20 Invalid, 742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 615 Invalid, 2 Unknown, 0 Unchecked, 20.7s Time] [2022-12-14 05:43:14,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2022-12-14 05:43:14,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 912. [2022-12-14 05:43:14,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 912 states, 511 states have (on average 4.594911937377691) internal successors, (2348), 911 states have internal predecessors, (2348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:43:14,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 2348 transitions. [2022-12-14 05:43:14,343 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 2348 transitions. Word has length 6 [2022-12-14 05:43:14,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:43:14,343 INFO L495 AbstractCegarLoop]: Abstraction has 912 states and 2348 transitions. [2022-12-14 05:43:14,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:43:14,343 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 2348 transitions. [2022-12-14 05:43:14,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 05:43:14,343 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:43:14,343 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:43:14,346 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (12)] Ended with exit code 0 [2022-12-14 05:43:14,558 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 05:43:14,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-12-14 05:43:14,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:43:14,946 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-12-14 05:43:14,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:43:14,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1523458621, now seen corresponding path program 1 times [2022-12-14 05:43:14,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:43:14,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1324551418] [2022-12-14 05:43:14,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:43:14,949 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:43:14,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:43:14,951 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:43:14,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-12-14 05:43:15,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:43:15,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 05:43:15,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:43:15,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:43:15,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:43:15,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:43:15,292 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:43:15,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1324551418] [2022-12-14 05:43:15,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1324551418] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:43:15,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1778655514] [2022-12-14 05:43:15,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:43:15,293 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 05:43:15,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 05:43:15,294 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 05:43:15,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2022-12-14 05:43:15,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:43:15,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 05:43:15,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:43:15,531 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:43:15,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:43:15,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:43:15,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1778655514] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:43:15,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804580897] [2022-12-14 05:43:15,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:43:15,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:43:15,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:43:15,689 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:43:15,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 05:43:15,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:43:15,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 05:43:15,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:43:15,811 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:43:15,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:43:15,994 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:43:15,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804580897] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:43:15,995 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 05:43:15,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 20 [2022-12-14 05:43:15,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491931968] [2022-12-14 05:43:15,995 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 05:43:15,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-14 05:43:15,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:43:15,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-14 05:43:15,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2022-12-14 05:43:15,996 INFO L87 Difference]: Start difference. First operand 912 states and 2348 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:43:18,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:43:18,373 INFO L93 Difference]: Finished difference Result 3585 states and 9263 transitions. [2022-12-14 05:43:18,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-14 05:43:18,374 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 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 7 [2022-12-14 05:43:18,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:43:18,384 INFO L225 Difference]: With dead ends: 3585 [2022-12-14 05:43:18,384 INFO L226 Difference]: Without dead ends: 3585 [2022-12-14 05:43:18,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=404, Invalid=1002, Unknown=0, NotChecked=0, Total=1406 [2022-12-14 05:43:18,385 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 1260 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1260 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-12-14 05:43:18,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1260 Valid, 18 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-12-14 05:43:18,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3585 states. [2022-12-14 05:43:18,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3585 to 912. [2022-12-14 05:43:18,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 912 states, 511 states have (on average 4.5870841487279845) internal successors, (2344), 911 states have internal predecessors, (2344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:43:18,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 2344 transitions. [2022-12-14 05:43:18,419 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 2344 transitions. Word has length 7 [2022-12-14 05:43:18,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:43:18,419 INFO L495 AbstractCegarLoop]: Abstraction has 912 states and 2344 transitions. [2022-12-14 05:43:18,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:43:18,419 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 2344 transitions. [2022-12-14 05:43:18,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 05:43:18,420 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:43:18,420 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:43:18,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-12-14 05:43:18,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2022-12-14 05:43:18,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-12-14 05:43:19,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:43:19,022 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-12-14 05:43:19,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:43:19,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1523462380, now seen corresponding path program 1 times [2022-12-14 05:43:19,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:43:19,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [429207674] [2022-12-14 05:43:19,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:43:19,025 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:43:19,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:43:19,026 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:43:19,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-12-14 05:43:19,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:43:19,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 05:43:19,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:43:19,145 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 05:43:19,192 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 05:43:19,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:43:19,425 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 05:43:19,425 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:43:19,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [429207674] [2022-12-14 05:43:19,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [429207674] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:43:19,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1662957097] [2022-12-14 05:43:19,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:43:19,426 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 05:43:19,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 05:43:19,426 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 05:43:19,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2022-12-14 05:43:19,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:43:19,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 05:43:19,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:43:19,709 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:43:19,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:43:19,948 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:43:19,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1662957097] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:43:19,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307652365] [2022-12-14 05:43:19,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:43:19,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:43:19,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:43:19,949 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:43:19,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-14 05:43:20,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:43:20,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 05:43:20,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:43:20,026 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 05:43:20,090 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 05:43:20,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:43:20,313 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 05:43:20,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307652365] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:43:20,313 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 05:43:20,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 5, 5, 3, 3] total 19 [2022-12-14 05:43:20,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653758704] [2022-12-14 05:43:20,314 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 05:43:20,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 05:43:20,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:43:20,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 05:43:20,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2022-12-14 05:43:20,315 INFO L87 Difference]: Start difference. First operand 912 states and 2344 transitions. Second operand has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:43:23,350 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:43:25,488 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:43:28,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:43:28,444 INFO L93 Difference]: Finished difference Result 5343 states and 13849 transitions. [2022-12-14 05:43:28,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-14 05:43:28,445 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 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 7 [2022-12-14 05:43:28,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:43:28,462 INFO L225 Difference]: With dead ends: 5343 [2022-12-14 05:43:28,462 INFO L226 Difference]: Without dead ends: 5343 [2022-12-14 05:43:28,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=373, Invalid=1349, Unknown=0, NotChecked=0, Total=1722 [2022-12-14 05:43:28,463 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 1476 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 704 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1476 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-12-14 05:43:28,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1476 Valid, 26 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 704 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2022-12-14 05:43:28,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5343 states. [2022-12-14 05:43:28,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5343 to 931. [2022-12-14 05:43:28,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 530 states have (on average 4.50188679245283) internal successors, (2386), 930 states have internal predecessors, (2386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:43:28,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 2386 transitions. [2022-12-14 05:43:28,497 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 2386 transitions. Word has length 7 [2022-12-14 05:43:28,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:43:28,497 INFO L495 AbstractCegarLoop]: Abstraction has 931 states and 2386 transitions. [2022-12-14 05:43:28,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:43:28,497 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 2386 transitions. [2022-12-14 05:43:28,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 05:43:28,497 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:43:28,498 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:43:28,500 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (18)] Ended with exit code 0 [2022-12-14 05:43:28,703 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-14 05:43:28,905 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Ended with exit code 0 [2022-12-14 05:43:29,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:43:29,100 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-12-14 05:43:29,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:43:29,101 INFO L85 PathProgramCache]: Analyzing trace with hash 536983546, now seen corresponding path program 1 times [2022-12-14 05:43:29,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:43:29,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1405252744] [2022-12-14 05:43:29,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:43:29,103 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:43:29,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:43:29,106 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:43:29,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-12-14 05:43:29,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:43:29,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 05:43:29,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:43:29,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:43:29,282 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-12-14 05:43:29,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 33 [2022-12-14 05:43:29,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:43:29,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-12-14 05:43:29,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:43:29,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-12-14 05:43:29,403 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 05:43:29,403 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 20 [2022-12-14 05:43:29,430 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 05:43:29,430 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:43:29,430 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:43:29,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1405252744] [2022-12-14 05:43:29,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1405252744] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:43:29,430 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:43:29,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 05:43:29,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685419844] [2022-12-14 05:43:29,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:43:29,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 05:43:29,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:43:29,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 05:43:29,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 05:43:29,432 INFO L87 Difference]: Start difference. First operand 931 states and 2386 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:43:29,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:43:29,748 INFO L93 Difference]: Finished difference Result 740 states and 1821 transitions. [2022-12-14 05:43:29,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:43:29,748 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 05:43:29,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:43:29,751 INFO L225 Difference]: With dead ends: 740 [2022-12-14 05:43:29,751 INFO L226 Difference]: Without dead ends: 740 [2022-12-14 05:43:29,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 05:43:29,752 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 98 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 05:43:29,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 2 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 05:43:29,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2022-12-14 05:43:29,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 740. [2022-12-14 05:43:29,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 457 states have (on average 3.984682713347921) internal successors, (1821), 739 states have internal predecessors, (1821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:43:29,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1821 transitions. [2022-12-14 05:43:29,772 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1821 transitions. Word has length 9 [2022-12-14 05:43:29,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:43:29,772 INFO L495 AbstractCegarLoop]: Abstraction has 740 states and 1821 transitions. [2022-12-14 05:43:29,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:43:29,772 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1821 transitions. [2022-12-14 05:43:29,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 05:43:29,772 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:43:29,772 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:43:29,785 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Ended with exit code 0 [2022-12-14 05:43:29,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:43:29,973 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-12-14 05:43:29,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:43:29,975 INFO L85 PathProgramCache]: Analyzing trace with hash 536983547, now seen corresponding path program 1 times [2022-12-14 05:43:29,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:43:29,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [785890504] [2022-12-14 05:43:29,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:43:29,976 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:43:29,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:43:29,979 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:43:29,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-12-14 05:43:30,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:43:30,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 05:43:30,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:43:30,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:43:30,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:43:30,272 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 05:43:30,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2022-12-14 05:43:30,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-14 05:43:30,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:43:30,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-14 05:43:30,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:43:30,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-14 05:43:30,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:43:30,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-14 05:43:30,408 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 05:43:30,408 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:43:30,408 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:43:30,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [785890504] [2022-12-14 05:43:30,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [785890504] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:43:30,409 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:43:30,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 05:43:30,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67044539] [2022-12-14 05:43:30,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:43:30,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 05:43:30,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:43:30,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 05:43:30,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 05:43:30,410 INFO L87 Difference]: Start difference. First operand 740 states and 1821 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:43:30,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:43:30,688 INFO L93 Difference]: Finished difference Result 549 states and 1256 transitions. [2022-12-14 05:43:30,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:43:30,689 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 05:43:30,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:43:30,691 INFO L225 Difference]: With dead ends: 549 [2022-12-14 05:43:30,691 INFO L226 Difference]: Without dead ends: 549 [2022-12-14 05:43:30,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 05:43:30,692 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 47 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 05:43:30,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 2 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 05:43:30,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2022-12-14 05:43:30,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 549. [2022-12-14 05:43:30,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 384 states have (on average 3.2708333333333335) internal successors, (1256), 548 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:43:30,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 1256 transitions. [2022-12-14 05:43:30,698 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 1256 transitions. Word has length 9 [2022-12-14 05:43:30,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:43:30,699 INFO L495 AbstractCegarLoop]: Abstraction has 549 states and 1256 transitions. [2022-12-14 05:43:30,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:43:30,699 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 1256 transitions. [2022-12-14 05:43:30,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 05:43:30,699 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:43:30,699 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:43:30,707 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Ended with exit code 0 [2022-12-14 05:43:30,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:43:30,900 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-12-14 05:43:30,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:43:30,901 INFO L85 PathProgramCache]: Analyzing trace with hash 645145586, now seen corresponding path program 1 times [2022-12-14 05:43:30,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:43:30,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1517191036] [2022-12-14 05:43:30,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:43:30,903 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:43:30,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:43:30,906 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:43:30,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-12-14 05:43:31,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:43:31,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 05:43:31,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:43:31,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:43:31,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:43:31,218 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 05:43:31,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2022-12-14 05:43:31,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-12-14 05:43:31,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:43:31,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-14 05:43:31,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:43:31,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-14 05:43:31,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:43:31,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-14 05:43:31,390 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 05:43:31,390 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:43:31,391 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:43:31,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1517191036] [2022-12-14 05:43:31,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1517191036] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:43:31,391 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:43:31,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 05:43:31,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665682547] [2022-12-14 05:43:31,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:43:31,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 05:43:31,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:43:31,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 05:43:31,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 05:43:31,392 INFO L87 Difference]: Start difference. First operand 549 states and 1256 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:43:31,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:43:31,699 INFO L93 Difference]: Finished difference Result 520 states and 1198 transitions. [2022-12-14 05:43:31,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:43:31,700 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-12-14 05:43:31,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:43:31,701 INFO L225 Difference]: With dead ends: 520 [2022-12-14 05:43:31,701 INFO L226 Difference]: Without dead ends: 520 [2022-12-14 05:43:31,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 05:43:31,702 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 134 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 05:43:31,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 2 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 05:43:31,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2022-12-14 05:43:31,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 520. [2022-12-14 05:43:31,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 377 states have (on average 3.1777188328912467) internal successors, (1198), 519 states have internal predecessors, (1198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:43:31,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 1198 transitions. [2022-12-14 05:43:31,708 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 1198 transitions. Word has length 11 [2022-12-14 05:43:31,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:43:31,708 INFO L495 AbstractCegarLoop]: Abstraction has 520 states and 1198 transitions. [2022-12-14 05:43:31,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:43:31,708 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 1198 transitions. [2022-12-14 05:43:31,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 05:43:31,709 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:43:31,709 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:43:31,719 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Ended with exit code 0 [2022-12-14 05:43:31,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:43:31,910 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-12-14 05:43:31,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:43:31,911 INFO L85 PathProgramCache]: Analyzing trace with hash 645145587, now seen corresponding path program 1 times [2022-12-14 05:43:31,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:43:31,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1090203380] [2022-12-14 05:43:31,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:43:31,913 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:43:31,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:43:31,916 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:43:31,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-12-14 05:43:32,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:43:32,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 05:43:32,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:43:32,072 INFO L350 Elim1Store]: Elim1 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 7 [2022-12-14 05:43:32,094 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 05:43:32,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-14 05:43:32,111 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 05:43:32,111 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 20 [2022-12-14 05:43:32,123 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 05:43:32,123 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:43:32,123 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:43:32,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1090203380] [2022-12-14 05:43:32,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1090203380] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:43:32,123 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:43:32,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 05:43:32,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879160198] [2022-12-14 05:43:32,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:43:32,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 05:43:32,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:43:32,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 05:43:32,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 05:43:32,124 INFO L87 Difference]: Start difference. First operand 520 states and 1198 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:43:32,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:43:32,408 INFO L93 Difference]: Finished difference Result 437 states and 997 transitions. [2022-12-14 05:43:32,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 05:43:32,409 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-12-14 05:43:32,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:43:32,410 INFO L225 Difference]: With dead ends: 437 [2022-12-14 05:43:32,410 INFO L226 Difference]: Without dead ends: 437 [2022-12-14 05:43:32,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 05:43:32,410 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 81 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 05:43:32,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 1 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 05:43:32,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2022-12-14 05:43:32,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 437. [2022-12-14 05:43:32,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 326 states have (on average 3.058282208588957) internal successors, (997), 436 states have internal predecessors, (997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:43:32,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 997 transitions. [2022-12-14 05:43:32,416 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 997 transitions. Word has length 11 [2022-12-14 05:43:32,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:43:32,416 INFO L495 AbstractCegarLoop]: Abstraction has 437 states and 997 transitions. [2022-12-14 05:43:32,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:43:32,416 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 997 transitions. [2022-12-14 05:43:32,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 05:43:32,416 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:43:32,416 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:43:32,425 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Ended with exit code 0 [2022-12-14 05:43:32,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:43:32,617 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-12-14 05:43:32,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:43:32,618 INFO L85 PathProgramCache]: Analyzing trace with hash 645145588, now seen corresponding path program 1 times [2022-12-14 05:43:32,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:43:32,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1667379579] [2022-12-14 05:43:32,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:43:32,620 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:43:32,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:43:32,622 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:43:32,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-12-14 05:43:32,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:43:32,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-14 05:43:32,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:43:32,874 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-12-14 05:43:32,882 INFO L350 Elim1Store]: Elim1 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 7 [2022-12-14 05:43:32,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:43:32,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 05:43:33,001 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 05:43:33,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-14 05:43:33,125 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 05:43:33,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-12-14 05:43:33,165 INFO L321 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2022-12-14 05:43:33,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2022-12-14 05:43:33,377 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 05:43:33,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:43:37,484 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:43:37,484 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:43:37,494 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 05:43:37,494 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:43:37,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1667379579] [2022-12-14 05:43:37,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1667379579] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:43:37,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [156094406] [2022-12-14 05:43:37,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:43:37,494 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 05:43:37,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 05:43:37,495 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 05:43:37,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2022-12-14 05:43:37,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:43:37,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 05:43:37,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:43:37,755 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-12-14 05:43:37,763 INFO L350 Elim1Store]: Elim1 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 7 [2022-12-14 05:43:37,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:43:37,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 05:43:37,993 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 05:43:37,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-14 05:43:38,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:43:38,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 05:43:38,104 INFO L321 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2022-12-14 05:43:38,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2022-12-14 05:43:38,172 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 05:43:38,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:43:47,608 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 05:43:47,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [156094406] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:43:47,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520096617] [2022-12-14 05:43:47,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:43:47,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:43:47,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:43:47,609 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:43:47,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-14 05:43:47,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:43:47,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 05:43:47,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:43:47,720 INFO L350 Elim1Store]: Elim1 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 7 [2022-12-14 05:43:47,726 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-12-14 05:43:47,857 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 05:43:47,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-14 05:43:47,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 05:43:47,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:43:47,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 05:43:48,018 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 05:43:48,018 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 13 [2022-12-14 05:43:48,117 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 05:43:48,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:43:57,619 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 05:43:57,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520096617] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:43:57,619 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 05:43:57,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5, 5, 5, 5] total 22 [2022-12-14 05:43:57,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825936645] [2022-12-14 05:43:57,619 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 05:43:57,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-14 05:43:57,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:43:57,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-14 05:43:57,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=396, Unknown=3, NotChecked=0, Total=506 [2022-12-14 05:43:57,620 INFO L87 Difference]: Start difference. First operand 437 states and 997 transitions. Second operand has 23 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:44:04,715 WARN L233 SmtUtils]: Spent 6.79s on a formula simplification. DAG size of input: 75 DAG size of output: 74 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:44:13,182 WARN L233 SmtUtils]: Spent 5.21s on a formula simplification. DAG size of input: 70 DAG size of output: 69 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:44:30,859 WARN L233 SmtUtils]: Spent 13.08s on a formula simplification. DAG size of input: 66 DAG size of output: 63 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:44:48,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:44:48,461 INFO L93 Difference]: Finished difference Result 1064 states and 2399 transitions. [2022-12-14 05:44:48,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-14 05:44:48,463 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 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 [2022-12-14 05:44:48,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:44:48,464 INFO L225 Difference]: With dead ends: 1064 [2022-12-14 05:44:48,465 INFO L226 Difference]: Without dead ends: 1064 [2022-12-14 05:44:48,465 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 65.9s TimeCoverageRelationStatistics Valid=312, Invalid=944, Unknown=4, NotChecked=0, Total=1260 [2022-12-14 05:44:48,465 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 792 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 792 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2022-12-14 05:44:48,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [792 Valid, 0 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 527 Invalid, 0 Unknown, 0 Unchecked, 7.7s Time] [2022-12-14 05:44:48,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1064 states. [2022-12-14 05:44:48,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1064 to 455. [2022-12-14 05:44:48,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 353 states have (on average 2.960339943342776) internal successors, (1045), 454 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:44:48,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 1045 transitions. [2022-12-14 05:44:48,474 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 1045 transitions. Word has length 11 [2022-12-14 05:44:48,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:44:48,474 INFO L495 AbstractCegarLoop]: Abstraction has 455 states and 1045 transitions. [2022-12-14 05:44:48,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:44:48,474 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 1045 transitions. [2022-12-14 05:44:48,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 05:44:48,475 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:44:48,475 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:44:48,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-12-14 05:44:48,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2022-12-14 05:44:48,889 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Ended with exit code 0 [2022-12-14 05:44:49,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:44:49,077 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-12-14 05:44:49,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:44:49,078 INFO L85 PathProgramCache]: Analyzing trace with hash 645145111, now seen corresponding path program 1 times [2022-12-14 05:44:49,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:44:49,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1551340640] [2022-12-14 05:44:49,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:44:49,080 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:44:49,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:44:49,081 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:44:49,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-12-14 05:44:49,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:44:49,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 05:44:49,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:44:49,295 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-12-14 05:44:49,295 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-12-14 05:44:49,318 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 05:44:49,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-14 05:44:49,338 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 05:44:49,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-14 05:44:49,352 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 05:44:49,352 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 20 [2022-12-14 05:44:49,363 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 05:44:49,363 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:44:49,363 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:44:49,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1551340640] [2022-12-14 05:44:49,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1551340640] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:44:49,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:44:49,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 05:44:49,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817937794] [2022-12-14 05:44:49,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:44:49,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 05:44:49,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:44:49,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 05:44:49,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 05:44:49,365 INFO L87 Difference]: Start difference. First operand 455 states and 1045 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:44:49,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:44:49,663 INFO L93 Difference]: Finished difference Result 378 states and 844 transitions. [2022-12-14 05:44:49,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 05:44:49,663 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-12-14 05:44:49,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:44:49,664 INFO L225 Difference]: With dead ends: 378 [2022-12-14 05:44:49,664 INFO L226 Difference]: Without dead ends: 378 [2022-12-14 05:44:49,664 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 05:44:49,665 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 74 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 05:44:49,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 1 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 05:44:49,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2022-12-14 05:44:49,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 378. [2022-12-14 05:44:49,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 303 states have (on average 2.7854785478547854) internal successors, (844), 377 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:44:49,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 844 transitions. [2022-12-14 05:44:49,672 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 844 transitions. Word has length 11 [2022-12-14 05:44:49,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:44:49,672 INFO L495 AbstractCegarLoop]: Abstraction has 378 states and 844 transitions. [2022-12-14 05:44:49,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:44:49,672 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 844 transitions. [2022-12-14 05:44:49,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 05:44:49,673 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:44:49,673 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:44:49,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-12-14 05:44:49,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:44:49,874 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-12-14 05:44:49,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:44:49,875 INFO L85 PathProgramCache]: Analyzing trace with hash 645145112, now seen corresponding path program 1 times [2022-12-14 05:44:49,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:44:49,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1663721533] [2022-12-14 05:44:49,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:44:49,877 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:44:49,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:44:49,879 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:44:49,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-12-14 05:44:50,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:44:50,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-14 05:44:50,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:44:50,137 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 05:44:50,137 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 05:44:50,188 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-12-14 05:44:50,189 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-12-14 05:44:50,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:44:50,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 05:44:50,324 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 05:44:50,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-14 05:44:50,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:44:50,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 05:44:50,435 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 05:44:50,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-14 05:44:50,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:44:50,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 05:44:50,496 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 05:44:50,497 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 13 [2022-12-14 05:44:50,587 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 05:44:50,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:45:00,054 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 05:45:00,054 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:45:00,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1663721533] [2022-12-14 05:45:00,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1663721533] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:45:00,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [20142460] [2022-12-14 05:45:00,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:45:00,055 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 05:45:00,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 05:45:00,056 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 05:45:00,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2022-12-14 05:45:00,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:45:00,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 05:45:00,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:45:00,361 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 05:45:00,361 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 05:45:00,427 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-12-14 05:45:00,427 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-12-14 05:45:00,647 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 05:45:00,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-14 05:45:00,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 05:45:00,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:45:00,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 05:45:00,763 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 05:45:00,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-14 05:45:00,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:45:00,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 05:45:00,937 INFO L321 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2022-12-14 05:45:00,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2022-12-14 05:45:01,008 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 05:45:01,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:45:10,572 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 05:45:10,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [20142460] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:45:10,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894583635] [2022-12-14 05:45:10,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:45:10,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:45:10,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:45:10,574 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:45:10,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d7c48e4-c6c6-4bb7-a05c-5173a370f426/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-12-14 05:45:10,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:45:10,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 41 conjunts are in the unsatisfiable core [2022-12-14 05:45:10,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:45:10,755 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 05:45:10,755 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 05:45:10,952 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 05:45:10,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-14 05:45:10,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 05:45:11,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:45:11,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 05:45:11,250 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 05:45:11,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-14 05:45:11,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:45:11,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 05:45:11,630 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 05:45:11,630 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 13 [2022-12-14 05:45:12,069 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:45:12,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:45:35,919 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 05:45:35,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 262 treesize of output 456