./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 5b917a1c951859368fb2463a158063964361d86aeab261c924186dc34055576d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:30:25,929 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:30:25,932 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:30:25,983 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:30:25,984 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:30:25,989 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:30:25,992 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:30:25,996 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:30:25,999 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:30:26,005 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:30:26,006 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:30:26,008 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:30:26,009 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:30:26,012 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:30:26,014 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:30:26,016 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:30:26,018 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:30:26,019 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:30:26,024 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:30:26,032 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:30:26,034 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:30:26,035 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:30:26,038 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:30:26,039 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:30:26,049 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:30:26,049 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:30:26,050 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:30:26,052 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:30:26,052 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:30:26,054 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:30:26,055 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:30:26,056 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:30:26,058 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:30:26,059 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:30:26,061 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:30:26,061 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:30:26,062 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:30:26,062 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:30:26,063 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:30:26,064 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:30:26,065 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:30:26,066 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-19 14:30:26,109 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:30:26,109 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:30:26,111 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:30:26,111 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:30:26,111 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:30:26,112 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:30:26,112 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:30:26,112 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 14:30:26,115 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:30:26,115 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:30:26,116 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 14:30:26,116 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 14:30:26,117 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:30:26,117 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 14:30:26,117 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 14:30:26,117 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 14:30:26,118 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:30:26,118 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 14:30:26,119 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:30:26,119 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:30:26,119 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:30:26,119 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:30:26,120 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:30:26,120 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:30:26,120 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:30:26,120 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:30:26,121 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:30:26,121 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:30:26,121 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:30:26,123 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:30:26,123 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:30:26,123 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:30:26,124 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 14:30:26,124 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 14:30:26,124 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:30:26,124 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:30:26,125 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:30:26,125 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5b917a1c951859368fb2463a158063964361d86aeab261c924186dc34055576d [2021-11-19 14:30:26,403 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:30:26,424 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:30:26,426 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:30:26,428 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:30:26,429 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:30:26,430 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i [2021-11-19 14:30:26,496 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/data/e2e67a9a1/503efe2c501a4fd18c803f78b299329f/FLAG368fc4b65 [2021-11-19 14:30:27,407 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:30:27,408 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i [2021-11-19 14:30:27,440 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/data/e2e67a9a1/503efe2c501a4fd18c803f78b299329f/FLAG368fc4b65 [2021-11-19 14:30:27,934 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/data/e2e67a9a1/503efe2c501a4fd18c803f78b299329f [2021-11-19 14:30:27,936 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:30:27,940 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:30:27,943 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:30:27,944 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:30:27,947 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:30:27,948 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:30:27" (1/1) ... [2021-11-19 14:30:27,950 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4165636c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:30:27, skipping insertion in model container [2021-11-19 14:30:27,950 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:30:27" (1/1) ... [2021-11-19 14:30:27,957 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:30:28,076 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:30:28,396 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i[4494,4507] [2021-11-19 14:30:28,406 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i[4554,4567] [2021-11-19 14:30:28,431 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-19 14:30:28,436 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-19 14:30:29,571 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:30:29,571 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:30:29,572 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:30:29,573 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:30:29,574 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:30:29,589 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:30:29,592 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:30:29,596 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:30:29,600 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:30:29,604 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:30:29,607 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:30:29,610 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:30:29,611 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:30:29,991 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-19 14:30:29,994 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-19 14:30:29,995 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-19 14:30:29,997 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-19 14:30:30,003 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-19 14:30:30,005 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-19 14:30:30,006 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-19 14:30:30,008 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-19 14:30:30,009 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-19 14:30:30,025 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-19 14:30:30,216 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-19 14:30:30,266 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:30:30,283 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-19 14:30:30,283 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7363f469 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:30:30, skipping insertion in model container [2021-11-19 14:30:30,284 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:30:30,284 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 14:30:30,286 INFO L158 Benchmark]: Toolchain (without parser) took 2347.08ms. Allocated memory was 100.7MB in the beginning and 127.9MB in the end (delta: 27.3MB). Free memory was 61.8MB in the beginning and 70.7MB in the end (delta: -8.9MB). Peak memory consumption was 18.0MB. Max. memory is 16.1GB. [2021-11-19 14:30:30,287 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 100.7MB. Free memory was 57.7MB in the beginning and 57.7MB in the end (delta: 49.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:30:30,288 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2340.58ms. Allocated memory was 100.7MB in the beginning and 127.9MB in the end (delta: 27.3MB). Free memory was 61.6MB in the beginning and 70.7MB in the end (delta: -9.1MB). Peak memory consumption was 18.0MB. Max. memory is 16.1GB. [2021-11-19 14:30:30,289 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 100.7MB. Free memory was 57.7MB in the beginning and 57.7MB in the end (delta: 49.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2340.58ms. Allocated memory was 100.7MB in the beginning and 127.9MB in the end (delta: 27.3MB). Free memory was 61.6MB in the beginning and 70.7MB in the end (delta: -9.1MB). Peak memory consumption was 18.0MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 7037]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 5b917a1c951859368fb2463a158063964361d86aeab261c924186dc34055576d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:30:32,508 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:30:32,511 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:30:32,562 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:30:32,563 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:30:32,568 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:30:32,570 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:30:32,574 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:30:32,578 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:30:32,585 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:30:32,587 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:30:32,589 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:30:32,589 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:30:32,590 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:30:32,592 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:30:32,593 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:30:32,594 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:30:32,595 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:30:32,597 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:30:32,600 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:30:32,602 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:30:32,604 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:30:32,607 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:30:32,608 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:30:32,618 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:30:32,619 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:30:32,620 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:30:32,621 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:30:32,622 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:30:32,623 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:30:32,624 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:30:32,625 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:30:32,627 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:30:32,628 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:30:32,629 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:30:32,630 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:30:32,631 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:30:32,631 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:30:32,631 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:30:32,633 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:30:32,634 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:30:32,635 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-19 14:30:32,687 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:30:32,688 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:30:32,689 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:30:32,690 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:30:32,690 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:30:32,690 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:30:32,690 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:30:32,691 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:30:32,691 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:30:32,691 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:30:32,693 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:30:32,694 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:30:32,694 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:30:32,694 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:30:32,694 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:30:32,695 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:30:32,695 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 14:30:32,695 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 14:30:32,695 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:30:32,695 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:30:32,696 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:30:32,696 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:30:32,696 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 14:30:32,696 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:30:32,697 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:30:32,697 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:30:32,697 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:30:32,697 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:30:32,698 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 14:30:32,698 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 14:30:32,698 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:30:32,698 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:30:32,699 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:30:32,699 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_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5b917a1c951859368fb2463a158063964361d86aeab261c924186dc34055576d [2021-11-19 14:30:33,137 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:30:33,159 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:30:33,162 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:30:33,164 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:30:33,164 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:30:33,166 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i [2021-11-19 14:30:33,232 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/data/ad4ac24ec/9fd2593d7fd34ad2a4f2956bda9de5a5/FLAGf55b90a8a [2021-11-19 14:30:33,967 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:30:33,968 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i [2021-11-19 14:30:34,006 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/data/ad4ac24ec/9fd2593d7fd34ad2a4f2956bda9de5a5/FLAGf55b90a8a [2021-11-19 14:30:34,067 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/data/ad4ac24ec/9fd2593d7fd34ad2a4f2956bda9de5a5 [2021-11-19 14:30:34,069 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:30:34,071 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:30:34,072 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:30:34,073 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:30:34,079 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:30:34,079 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:30:34" (1/1) ... [2021-11-19 14:30:34,081 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d248301 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:30:34, skipping insertion in model container [2021-11-19 14:30:34,082 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:30:34" (1/1) ... [2021-11-19 14:30:34,089 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:30:34,212 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:30:34,546 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i[4494,4507] [2021-11-19 14:30:34,557 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i[4554,4567] [2021-11-19 14:30:34,584 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-19 14:30:34,590 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-19 14:30:35,592 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:30:35,597 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:30:35,598 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:30:35,598 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:30:35,599 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:30:35,617 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:30:35,618 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:30:35,620 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:30:35,621 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:30:35,623 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:30:35,624 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:30:35,625 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:30:35,626 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:30:36,011 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-19 14:30:36,013 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-19 14:30:36,014 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-19 14:30:36,015 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-19 14:30:36,017 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-19 14:30:36,018 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-19 14:30:36,019 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-19 14:30:36,020 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-19 14:30:36,021 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-19 14:30:36,022 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-19 14:30:36,255 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-19 14:30:36,316 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:30:36,347 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 14:30:36,379 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:30:36,384 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i[4494,4507] [2021-11-19 14:30:36,384 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i[4554,4567] [2021-11-19 14:30:36,386 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-19 14:30:36,386 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-19 14:30:36,432 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:30:36,437 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:30:36,438 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:30:36,438 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:30:36,439 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:30:36,449 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:30:36,458 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:30:36,460 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:30:36,461 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:30:36,462 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:30:36,463 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:30:36,464 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:30:36,464 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:30:36,535 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-19 14:30:36,536 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-19 14:30:36,537 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-19 14:30:36,538 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-19 14:30:36,539 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-19 14:30:36,540 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-19 14:30:36,540 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-19 14:30:36,541 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-19 14:30:36,541 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-19 14:30:36,542 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-19 14:30:36,574 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-19 14:30:36,596 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:30:36,609 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:30:36,633 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i[4494,4507] [2021-11-19 14:30:36,639 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i[4554,4567] [2021-11-19 14:30:36,641 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-19 14:30:36,653 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-19 14:30:36,687 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:30:36,687 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:30:36,688 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:30:36,688 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:30:36,689 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:30:36,695 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:30:36,696 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:30:36,697 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:30:36,698 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:30:36,699 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:30:36,699 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:30:36,700 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:30:36,700 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:30:36,753 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-19 14:30:36,753 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-19 14:30:36,754 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-19 14:30:36,755 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-19 14:30:36,756 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-19 14:30:36,756 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-19 14:30:36,757 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-19 14:30:36,758 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-19 14:30:36,758 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-19 14:30:36,759 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-19 14:30:36,792 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-19 14:30:36,816 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:30:37,132 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:30:37,132 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:30:37 WrapperNode [2021-11-19 14:30:37,133 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:30:37,134 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:30:37,135 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:30:37,135 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:30:37,142 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:30:37" (1/1) ... [2021-11-19 14:30:37,245 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:30:37" (1/1) ... [2021-11-19 14:30:37,306 INFO L137 Inliner]: procedures = 700, calls = 1038, calls flagged for inlining = 50, calls inlined = 4, statements flattened = 93 [2021-11-19 14:30:37,307 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:30:37,308 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:30:37,308 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:30:37,309 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:30:37,317 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:30:37" (1/1) ... [2021-11-19 14:30:37,317 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:30:37" (1/1) ... [2021-11-19 14:30:37,329 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:30:37" (1/1) ... [2021-11-19 14:30:37,330 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:30:37" (1/1) ... [2021-11-19 14:30:37,352 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:30:37" (1/1) ... [2021-11-19 14:30:37,364 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:30:37" (1/1) ... [2021-11-19 14:30:37,382 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:30:37" (1/1) ... [2021-11-19 14:30:37,390 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:30:37,405 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:30:37,405 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:30:37,406 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:30:37,406 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:30:37" (1/1) ... [2021-11-19 14:30:37,413 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:30:37,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:30:37,442 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:30:37,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:30:37,499 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_init [2021-11-19 14:30:37,499 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_init [2021-11-19 14:30:37,499 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 14:30:37,499 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 14:30:37,500 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-19 14:30:37,500 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-19 14:30:37,500 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2021-11-19 14:30:37,501 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2021-11-19 14:30:37,501 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2021-11-19 14:30:37,501 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2021-11-19 14:30:37,501 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:30:37,501 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-19 14:30:37,501 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:30:37,501 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:30:37,502 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_empty [2021-11-19 14:30:37,502 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_empty [2021-11-19 14:30:37,502 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-19 14:30:37,502 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-19 14:30:37,502 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 14:30:37,502 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-19 14:30:37,502 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-19 14:30:37,755 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:30:37,758 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:30:38,027 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:30:38,035 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:30:38,035 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 14:30:38,037 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:30:38 BoogieIcfgContainer [2021-11-19 14:30:38,037 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:30:38,039 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:30:38,039 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:30:38,042 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:30:38,043 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:30:34" (1/3) ... [2021-11-19 14:30:38,043 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1244bba9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:30:38, skipping insertion in model container [2021-11-19 14:30:38,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:30:37" (2/3) ... [2021-11-19 14:30:38,044 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1244bba9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:30:38, skipping insertion in model container [2021-11-19 14:30:38,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:30:38" (3/3) ... [2021-11-19 14:30:38,045 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_init_harness.i [2021-11-19 14:30:38,051 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:30:38,051 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 14:30:38,099 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:30:38,105 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 14:30:38,106 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 14:30:38,122 INFO L276 IsEmpty]: Start isEmpty. Operand has 61 states, 43 states have (on average 1.3488372093023255) internal successors, (58), 44 states have internal predecessors, (58), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-19 14:30:38,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-19 14:30:38,128 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:30:38,129 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:30:38,129 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:30:38,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:30:38,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1017333715, now seen corresponding path program 1 times [2021-11-19 14:30:38,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:30:38,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1117225385] [2021-11-19 14:30:38,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:30:38,150 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:30:38,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:30:38,153 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:30:38,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 14:30:38,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:30:38,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-19 14:30:38,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:30:38,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:30:38,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:30:38,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:30:38,592 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:30:38,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1117225385] [2021-11-19 14:30:38,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1117225385] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:30:38,593 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:30:38,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-19 14:30:38,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335506746] [2021-11-19 14:30:38,597 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:30:38,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 14:30:38,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:30:38,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 14:30:38,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 14:30:38,667 INFO L87 Difference]: Start difference. First operand has 61 states, 43 states have (on average 1.3488372093023255) internal successors, (58), 44 states have internal predecessors, (58), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-19 14:30:38,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:30:38,710 INFO L93 Difference]: Finished difference Result 117 states and 158 transitions. [2021-11-19 14:30:38,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 14:30:38,712 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2021-11-19 14:30:38,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:30:38,723 INFO L225 Difference]: With dead ends: 117 [2021-11-19 14:30:38,724 INFO L226 Difference]: Without dead ends: 56 [2021-11-19 14:30:38,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 14:30:38,735 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:30:38,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:30:38,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-19 14:30:38,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-11-19 14:30:38,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 40 states have internal predecessors, (51), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-19 14:30:38,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2021-11-19 14:30:38,795 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 26 [2021-11-19 14:30:38,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:30:38,796 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2021-11-19 14:30:38,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-19 14:30:38,797 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2021-11-19 14:30:38,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-19 14:30:38,800 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:30:38,800 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:30:38,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 14:30:39,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:30:39,022 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:30:39,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:30:39,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1834982165, now seen corresponding path program 1 times [2021-11-19 14:30:39,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:30:39,024 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [450186507] [2021-11-19 14:30:39,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:30:39,025 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:30:39,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:30:39,029 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:30:39,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 14:30:39,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:30:39,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-19 14:30:39,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:30:39,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:39,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:39,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:39,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:39,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:39,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:39,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 37 [2021-11-19 14:30:39,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:39,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:39,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:39,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:39,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:39,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:39,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 35 [2021-11-19 14:30:41,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:30:41,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:30:42,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:30:42,195 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:30:42,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [450186507] [2021-11-19 14:30:42,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [450186507] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:30:42,195 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:30:42,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 6] imperfect sequences [] total 14 [2021-11-19 14:30:42,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986887389] [2021-11-19 14:30:42,196 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:30:42,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 14:30:42,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:30:42,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 14:30:42,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:30:42,199 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand has 14 states, 11 states have (on average 3.0) internal successors, (33), 12 states have internal predecessors, (33), 6 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-19 14:30:42,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:30:42,652 INFO L93 Difference]: Finished difference Result 124 states and 157 transitions. [2021-11-19 14:30:42,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 14:30:42,653 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 3.0) internal successors, (33), 12 states have internal predecessors, (33), 6 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 26 [2021-11-19 14:30:42,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:30:42,657 INFO L225 Difference]: With dead ends: 124 [2021-11-19 14:30:42,657 INFO L226 Difference]: Without dead ends: 73 [2021-11-19 14:30:42,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:30:42,659 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 24 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 612 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:30:42,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 612 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 45 Unchecked, 0.3s Time] [2021-11-19 14:30:42,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-11-19 14:30:42,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 70. [2021-11-19 14:30:42,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 51 states have (on average 1.3333333333333333) internal successors, (68), 53 states have internal predecessors, (68), 10 states have call successors, (10), 7 states have call predecessors, (10), 8 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2021-11-19 14:30:42,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 89 transitions. [2021-11-19 14:30:42,679 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 89 transitions. Word has length 26 [2021-11-19 14:30:42,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:30:42,679 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 89 transitions. [2021-11-19 14:30:42,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 3.0) internal successors, (33), 12 states have internal predecessors, (33), 6 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-19 14:30:42,680 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 89 transitions. [2021-11-19 14:30:42,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-19 14:30:42,687 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:30:42,687 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:30:42,720 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-19 14:30:42,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:30:42,917 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:30:42,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:30:42,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1650638505, now seen corresponding path program 1 times [2021-11-19 14:30:42,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:30:42,918 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1798283717] [2021-11-19 14:30:42,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:30:42,919 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:30:42,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:30:42,920 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:30:42,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 14:30:43,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:30:43,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-19 14:30:43,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:30:43,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:43,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:43,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:43,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:43,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:43,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:43,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 35 [2021-11-19 14:30:44,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:30:44,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:30:45,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 26 [2021-11-19 14:30:45,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:30:45,326 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:30:45,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1798283717] [2021-11-19 14:30:45,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1798283717] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:30:45,327 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:30:45,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11, 10] imperfect sequences [] total 19 [2021-11-19 14:30:45,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946412359] [2021-11-19 14:30:45,327 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:30:45,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 14:30:45,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:30:45,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 14:30:45,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-11-19 14:30:45,330 INFO L87 Difference]: Start difference. First operand 70 states and 89 transitions. Second operand has 19 states, 15 states have (on average 2.2) internal successors, (33), 16 states have internal predecessors, (33), 7 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-19 14:30:45,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:30:45,824 INFO L93 Difference]: Finished difference Result 168 states and 222 transitions. [2021-11-19 14:30:45,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-19 14:30:45,826 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 2.2) internal successors, (33), 16 states have internal predecessors, (33), 7 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 26 [2021-11-19 14:30:45,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:30:45,828 INFO L225 Difference]: With dead ends: 168 [2021-11-19 14:30:45,828 INFO L226 Difference]: Without dead ends: 111 [2021-11-19 14:30:45,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-11-19 14:30:45,830 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 169 mSDsluCounter, 702 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 791 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:30:45,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 791 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 70 Invalid, 0 Unknown, 73 Unchecked, 0.3s Time] [2021-11-19 14:30:45,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-11-19 14:30:45,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 89. [2021-11-19 14:30:45,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 69 states have (on average 1.3768115942028984) internal successors, (95), 71 states have internal predecessors, (95), 11 states have call successors, (11), 7 states have call predecessors, (11), 8 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2021-11-19 14:30:45,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 118 transitions. [2021-11-19 14:30:45,846 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 118 transitions. Word has length 26 [2021-11-19 14:30:45,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:30:45,847 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 118 transitions. [2021-11-19 14:30:45,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 2.2) internal successors, (33), 16 states have internal predecessors, (33), 7 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-19 14:30:45,847 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 118 transitions. [2021-11-19 14:30:45,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-19 14:30:45,849 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:30:45,849 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:30:45,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 14:30:46,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:30:46,064 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:30:46,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:30:46,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1257611495, now seen corresponding path program 1 times [2021-11-19 14:30:46,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:30:46,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1052164030] [2021-11-19 14:30:46,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:30:46,066 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:30:46,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:30:46,067 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:30:46,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 14:30:46,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:30:46,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-19 14:30:46,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:30:46,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:46,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:46,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:46,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:46,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:46,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:46,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 37 [2021-11-19 14:30:46,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:46,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:46,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:46,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:46,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:46,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:46,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 35 [2021-11-19 14:30:47,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:30:47,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:30:48,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2021-11-19 14:30:48,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2021-11-19 14:30:48,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:30:48,636 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:30:48,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1052164030] [2021-11-19 14:30:48,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1052164030] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:30:48,636 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:30:48,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11, 7] imperfect sequences [] total 16 [2021-11-19 14:30:48,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800726394] [2021-11-19 14:30:48,637 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:30:48,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-19 14:30:48,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:30:48,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-19 14:30:48,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:30:48,639 INFO L87 Difference]: Start difference. First operand 89 states and 118 transitions. Second operand has 16 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 14 states have internal predecessors, (33), 6 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-19 14:30:49,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:30:49,210 INFO L93 Difference]: Finished difference Result 197 states and 269 transitions. [2021-11-19 14:30:49,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-19 14:30:49,211 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 14 states have internal predecessors, (33), 6 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 26 [2021-11-19 14:30:49,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:30:49,213 INFO L225 Difference]: With dead ends: 197 [2021-11-19 14:30:49,213 INFO L226 Difference]: Without dead ends: 134 [2021-11-19 14:30:49,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-11-19 14:30:49,215 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 123 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 730 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:30:49,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 730 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 83 Invalid, 0 Unknown, 73 Unchecked, 0.4s Time] [2021-11-19 14:30:49,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-11-19 14:30:49,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 91. [2021-11-19 14:30:49,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 71 states have (on average 1.380281690140845) internal successors, (98), 73 states have internal predecessors, (98), 11 states have call successors, (11), 7 states have call predecessors, (11), 8 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2021-11-19 14:30:49,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 121 transitions. [2021-11-19 14:30:49,234 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 121 transitions. Word has length 26 [2021-11-19 14:30:49,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:30:49,234 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 121 transitions. [2021-11-19 14:30:49,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 14 states have internal predecessors, (33), 6 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-19 14:30:49,235 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 121 transitions. [2021-11-19 14:30:49,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-19 14:30:49,236 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:30:49,236 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:30:49,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 14:30:49,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:30:49,441 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:30:49,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:30:49,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1515776933, now seen corresponding path program 1 times [2021-11-19 14:30:49,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:30:49,442 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1371626426] [2021-11-19 14:30:49,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:30:49,443 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:30:49,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:30:49,444 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:30:49,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 14:30:49,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:30:49,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 14:30:49,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:30:49,756 INFO L354 Elim1Store]: treesize reduction 157, result has 14.2 percent of original size [2021-11-19 14:30:49,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 35 [2021-11-19 14:30:51,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:30:51,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:30:51,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2021-11-19 14:30:51,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:30:51,743 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:30:51,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1371626426] [2021-11-19 14:30:51,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1371626426] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:30:51,743 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:30:51,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11, 10] imperfect sequences [] total 16 [2021-11-19 14:30:51,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277443706] [2021-11-19 14:30:51,744 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:30:51,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-19 14:30:51,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:30:51,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-19 14:30:51,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:30:51,745 INFO L87 Difference]: Start difference. First operand 91 states and 121 transitions. Second operand has 16 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 14 states have internal predecessors, (31), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 14:30:52,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:30:52,095 INFO L93 Difference]: Finished difference Result 244 states and 338 transitions. [2021-11-19 14:30:52,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-19 14:30:52,096 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 14 states have internal predecessors, (31), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 26 [2021-11-19 14:30:52,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:30:52,097 INFO L225 Difference]: With dead ends: 244 [2021-11-19 14:30:52,097 INFO L226 Difference]: Without dead ends: 177 [2021-11-19 14:30:52,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-11-19 14:30:52,099 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 221 mSDsluCounter, 656 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 755 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 114 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:30:52,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 755 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 100 Invalid, 0 Unknown, 114 Unchecked, 0.2s Time] [2021-11-19 14:30:52,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-11-19 14:30:52,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 104. [2021-11-19 14:30:52,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 84 states have (on average 1.3928571428571428) internal successors, (117), 86 states have internal predecessors, (117), 11 states have call successors, (11), 7 states have call predecessors, (11), 8 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2021-11-19 14:30:52,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 140 transitions. [2021-11-19 14:30:52,118 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 140 transitions. Word has length 26 [2021-11-19 14:30:52,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:30:52,118 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 140 transitions. [2021-11-19 14:30:52,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 14 states have internal predecessors, (31), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 14:30:52,118 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 140 transitions. [2021-11-19 14:30:52,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-19 14:30:52,120 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:30:52,120 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:30:52,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 14:30:52,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:30:52,325 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:30:52,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:30:52,325 INFO L85 PathProgramCache]: Analyzing trace with hash 504659683, now seen corresponding path program 1 times [2021-11-19 14:30:52,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:30:52,326 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1306796314] [2021-11-19 14:30:52,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:30:52,326 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:30:52,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:30:52,327 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:30:52,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 14:30:52,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:30:52,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:30:52,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:30:52,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:30:52,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:30:52,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:30:52,667 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:30:52,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1306796314] [2021-11-19 14:30:52,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1306796314] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:30:52,667 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:30:52,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 7 [2021-11-19 14:30:52,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130796175] [2021-11-19 14:30:52,667 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:30:52,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:30:52,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:30:52,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:30:52,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:30:52,668 INFO L87 Difference]: Start difference. First operand 104 states and 140 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 14:30:52,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:30:52,746 INFO L93 Difference]: Finished difference Result 206 states and 282 transitions. [2021-11-19 14:30:52,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:30:52,746 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2021-11-19 14:30:52,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:30:52,747 INFO L225 Difference]: With dead ends: 206 [2021-11-19 14:30:52,747 INFO L226 Difference]: Without dead ends: 87 [2021-11-19 14:30:52,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:30:52,749 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 45 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:30:52,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 389 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:30:52,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-11-19 14:30:52,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-11-19 14:30:52,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 68 states have (on average 1.338235294117647) internal successors, (91), 69 states have internal predecessors, (91), 11 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-19 14:30:52,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 113 transitions. [2021-11-19 14:30:52,762 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 113 transitions. Word has length 26 [2021-11-19 14:30:52,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:30:52,762 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 113 transitions. [2021-11-19 14:30:52,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 14:30:52,763 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 113 transitions. [2021-11-19 14:30:52,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-19 14:30:52,764 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:30:52,764 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:30:52,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 14:30:52,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:30:52,969 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:30:52,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:30:52,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1687611897, now seen corresponding path program 1 times [2021-11-19 14:30:52,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:30:52,970 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [97782675] [2021-11-19 14:30:52,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:30:52,970 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:30:52,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:30:52,971 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:30:52,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 14:30:53,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:30:53,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:30:53,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:30:53,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:30:53,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:30:53,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:30:53,401 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:30:53,401 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [97782675] [2021-11-19 14:30:53,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [97782675] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:30:53,401 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:30:53,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 10 [2021-11-19 14:30:53,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149772757] [2021-11-19 14:30:53,401 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:30:53,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 14:30:53,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:30:53,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 14:30:53,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:30:53,403 INFO L87 Difference]: Start difference. First operand 87 states and 113 transitions. Second operand has 10 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 14:30:53,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:30:53,655 INFO L93 Difference]: Finished difference Result 158 states and 204 transitions. [2021-11-19 14:30:53,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:30:53,656 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2021-11-19 14:30:53,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:30:53,657 INFO L225 Difference]: With dead ends: 158 [2021-11-19 14:30:53,657 INFO L226 Difference]: Without dead ends: 89 [2021-11-19 14:30:53,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:30:53,658 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 40 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:30:53,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 419 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:30:53,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-11-19 14:30:53,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2021-11-19 14:30:53,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 68 states have (on average 1.3088235294117647) internal successors, (89), 69 states have internal predecessors, (89), 11 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-19 14:30:53,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 111 transitions. [2021-11-19 14:30:53,670 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 111 transitions. Word has length 28 [2021-11-19 14:30:53,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:30:53,670 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 111 transitions. [2021-11-19 14:30:53,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 14:30:53,670 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 111 transitions. [2021-11-19 14:30:53,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-19 14:30:53,672 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:30:53,672 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:30:53,689 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-19 14:30:53,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:30:53,885 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:30:53,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:30:53,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1850407916, now seen corresponding path program 1 times [2021-11-19 14:30:53,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:30:53,886 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [413623876] [2021-11-19 14:30:53,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:30:53,887 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:30:53,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:30:53,888 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:30:53,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 14:30:54,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:30:54,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:30:54,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:30:54,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:30:54,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:30:54,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:30:54,331 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:30:54,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [413623876] [2021-11-19 14:30:54,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [413623876] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:30:54,332 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:30:54,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 12 [2021-11-19 14:30:54,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69174632] [2021-11-19 14:30:54,332 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:30:54,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:30:54,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:30:54,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:30:54,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:30:54,334 INFO L87 Difference]: Start difference. First operand 87 states and 111 transitions. Second operand has 12 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 14:30:54,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:30:54,652 INFO L93 Difference]: Finished difference Result 176 states and 227 transitions. [2021-11-19 14:30:54,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:30:54,653 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2021-11-19 14:30:54,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:30:54,655 INFO L225 Difference]: With dead ends: 176 [2021-11-19 14:30:54,655 INFO L226 Difference]: Without dead ends: 105 [2021-11-19 14:30:54,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:30:54,656 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 67 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:30:54,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 460 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 14:30:54,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-19 14:30:54,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 89. [2021-11-19 14:30:54,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 70 states have (on average 1.3) internal successors, (91), 71 states have internal predecessors, (91), 11 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-19 14:30:54,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 113 transitions. [2021-11-19 14:30:54,667 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 113 transitions. Word has length 30 [2021-11-19 14:30:54,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:30:54,667 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 113 transitions. [2021-11-19 14:30:54,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 14:30:54,668 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 113 transitions. [2021-11-19 14:30:54,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-19 14:30:54,669 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:30:54,669 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:30:54,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 14:30:54,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:30:54,884 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:30:54,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:30:54,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1395309347, now seen corresponding path program 1 times [2021-11-19 14:30:54,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:30:54,885 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [203367004] [2021-11-19 14:30:54,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:30:54,886 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:30:54,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:30:54,886 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:30:54,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 14:30:54,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:30:55,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:30:55,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:30:55,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:30:55,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:30:55,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:30:55,243 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:30:55,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [203367004] [2021-11-19 14:30:55,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [203367004] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:30:55,243 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:30:55,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 3] imperfect sequences [] total 9 [2021-11-19 14:30:55,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328040121] [2021-11-19 14:30:55,244 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:30:55,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 14:30:55,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:30:55,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 14:30:55,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:30:55,245 INFO L87 Difference]: Start difference. First operand 89 states and 113 transitions. Second operand has 9 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-19 14:30:55,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:30:55,578 INFO L93 Difference]: Finished difference Result 168 states and 219 transitions. [2021-11-19 14:30:55,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:30:55,579 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 31 [2021-11-19 14:30:55,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:30:55,580 INFO L225 Difference]: With dead ends: 168 [2021-11-19 14:30:55,580 INFO L226 Difference]: Without dead ends: 103 [2021-11-19 14:30:55,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:30:55,581 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 52 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:30:55,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 333 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 14:30:55,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-11-19 14:30:55,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 83. [2021-11-19 14:30:55,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 64 states have (on average 1.296875) internal successors, (83), 65 states have internal predecessors, (83), 11 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-19 14:30:55,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 105 transitions. [2021-11-19 14:30:55,592 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 105 transitions. Word has length 31 [2021-11-19 14:30:55,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:30:55,593 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 105 transitions. [2021-11-19 14:30:55,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-19 14:30:55,593 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 105 transitions. [2021-11-19 14:30:55,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-19 14:30:55,594 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:30:55,595 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:30:55,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 14:30:55,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:30:55,801 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:30:55,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:30:55,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1854431003, now seen corresponding path program 1 times [2021-11-19 14:30:55,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:30:55,802 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1213566533] [2021-11-19 14:30:55,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:30:55,802 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:30:55,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:30:55,803 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:30:55,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 14:30:56,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:30:56,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-19 14:30:56,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:30:56,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:56,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:56,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:56,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:56,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:56,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:56,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 35 [2021-11-19 14:30:56,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:56,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:56,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:56,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:56,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:56,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:56,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 37 [2021-11-19 14:30:58,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:30:58,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:31:08,441 INFO L354 Elim1Store]: treesize reduction 29, result has 3.3 percent of original size [2021-11-19 14:31:08,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 7762 treesize of output 1 [2021-11-19 14:31:08,452 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-19 14:31:08,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 14792 treesize of output 1 [2021-11-19 14:31:08,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:31:08,471 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:31:08,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1213566533] [2021-11-19 14:31:08,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1213566533] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:31:08,472 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:31:08,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15, 11] imperfect sequences [] total 24 [2021-11-19 14:31:08,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134916234] [2021-11-19 14:31:08,472 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:31:08,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-19 14:31:08,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:31:08,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-19 14:31:08,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-11-19 14:31:08,474 INFO L87 Difference]: Start difference. First operand 83 states and 105 transitions. Second operand has 24 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 8 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-19 14:31:09,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:31:09,471 INFO L93 Difference]: Finished difference Result 183 states and 232 transitions. [2021-11-19 14:31:09,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-19 14:31:09,472 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 8 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) Word has length 39 [2021-11-19 14:31:09,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:31:09,474 INFO L225 Difference]: With dead ends: 183 [2021-11-19 14:31:09,474 INFO L226 Difference]: Without dead ends: 113 [2021-11-19 14:31:09,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2021-11-19 14:31:09,475 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 58 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 678 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 142 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:31:09,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 678 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 100 Invalid, 0 Unknown, 142 Unchecked, 0.7s Time] [2021-11-19 14:31:09,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-11-19 14:31:09,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 103. [2021-11-19 14:31:09,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 79 states have (on average 1.2784810126582278) internal successors, (101), 82 states have internal predecessors, (101), 13 states have call successors, (13), 8 states have call predecessors, (13), 10 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2021-11-19 14:31:09,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 131 transitions. [2021-11-19 14:31:09,489 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 131 transitions. Word has length 39 [2021-11-19 14:31:09,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:31:09,490 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 131 transitions. [2021-11-19 14:31:09,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 8 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-19 14:31:09,490 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 131 transitions. [2021-11-19 14:31:09,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-19 14:31:09,491 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:31:09,492 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:31:09,508 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 14:31:09,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:31:09,708 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:31:09,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:31:09,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1596265565, now seen corresponding path program 1 times [2021-11-19 14:31:09,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:31:09,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1087147682] [2021-11-19 14:31:09,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:31:09,709 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:31:09,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:31:09,710 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:31:09,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 14:31:09,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:31:09,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-19 14:31:09,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:31:10,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:31:10,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:31:11,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:31:11,731 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:31:11,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1087147682] [2021-11-19 14:31:11,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1087147682] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:31:11,732 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:31:11,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12, 11] imperfect sequences [] total 18 [2021-11-19 14:31:11,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673567621] [2021-11-19 14:31:11,732 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:31:11,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-19 14:31:11,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:31:11,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-19 14:31:11,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-11-19 14:31:11,734 INFO L87 Difference]: Start difference. First operand 103 states and 131 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 3 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-19 14:31:12,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:31:12,589 INFO L93 Difference]: Finished difference Result 250 states and 332 transitions. [2021-11-19 14:31:12,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-19 14:31:12,590 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 3 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 39 [2021-11-19 14:31:12,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:31:12,592 INFO L225 Difference]: With dead ends: 250 [2021-11-19 14:31:12,592 INFO L226 Difference]: Without dead ends: 172 [2021-11-19 14:31:12,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-11-19 14:31:12,594 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 150 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:31:12,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 544 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 174 Invalid, 0 Unknown, 84 Unchecked, 0.5s Time] [2021-11-19 14:31:12,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-11-19 14:31:12,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 144. [2021-11-19 14:31:12,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 114 states have (on average 1.280701754385965) internal successors, (146), 119 states have internal predecessors, (146), 16 states have call successors, (16), 10 states have call predecessors, (16), 13 states have return successors, (24), 14 states have call predecessors, (24), 15 states have call successors, (24) [2021-11-19 14:31:12,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 186 transitions. [2021-11-19 14:31:12,613 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 186 transitions. Word has length 39 [2021-11-19 14:31:12,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:31:12,614 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 186 transitions. [2021-11-19 14:31:12,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 3 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-19 14:31:12,614 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 186 transitions. [2021-11-19 14:31:12,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-19 14:31:12,615 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:31:12,615 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:31:12,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 14:31:12,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:31:12,825 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:31:12,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:31:12,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1687584481, now seen corresponding path program 1 times [2021-11-19 14:31:12,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:31:12,826 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [891780707] [2021-11-19 14:31:12,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:31:12,826 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:31:12,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:31:12,827 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:31:12,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 14:31:12,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:31:12,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 14:31:12,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:31:13,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:31:13,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:31:13,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:31:13,579 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:31:13,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [891780707] [2021-11-19 14:31:13,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [891780707] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:31:13,580 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:31:13,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11, 11] imperfect sequences [] total 14 [2021-11-19 14:31:13,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039704955] [2021-11-19 14:31:13,580 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:31:13,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 14:31:13,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:31:13,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 14:31:13,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:31:13,581 INFO L87 Difference]: Start difference. First operand 144 states and 186 transitions. Second operand has 14 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 5 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-19 14:31:13,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:31:13,991 INFO L93 Difference]: Finished difference Result 302 states and 412 transitions. [2021-11-19 14:31:13,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 14:31:13,993 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 5 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 39 [2021-11-19 14:31:13,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:31:13,994 INFO L225 Difference]: With dead ends: 302 [2021-11-19 14:31:13,994 INFO L226 Difference]: Without dead ends: 159 [2021-11-19 14:31:13,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-11-19 14:31:13,996 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 97 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:31:13,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 525 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 14:31:13,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-11-19 14:31:14,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 140. [2021-11-19 14:31:14,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 110 states have (on average 1.2545454545454546) internal successors, (138), 115 states have internal predecessors, (138), 17 states have call successors, (17), 10 states have call predecessors, (17), 12 states have return successors, (26), 14 states have call predecessors, (26), 16 states have call successors, (26) [2021-11-19 14:31:14,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 181 transitions. [2021-11-19 14:31:14,013 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 181 transitions. Word has length 39 [2021-11-19 14:31:14,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:31:14,013 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 181 transitions. [2021-11-19 14:31:14,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 5 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-19 14:31:14,013 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 181 transitions. [2021-11-19 14:31:14,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-19 14:31:14,014 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:31:14,014 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:31:14,026 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-19 14:31:14,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:31:14,217 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:31:14,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:31:14,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1455716955, now seen corresponding path program 1 times [2021-11-19 14:31:14,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:31:14,218 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1633484761] [2021-11-19 14:31:14,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:31:14,218 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:31:14,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:31:14,219 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:31:14,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 14:31:14,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:31:14,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:31:14,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:31:14,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:31:14,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:31:14,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:31:14,463 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:31:14,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1633484761] [2021-11-19 14:31:14,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1633484761] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:31:14,463 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:31:14,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-19 14:31:14,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203763194] [2021-11-19 14:31:14,464 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:31:14,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:31:14,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:31:14,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:31:14,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:31:14,464 INFO L87 Difference]: Start difference. First operand 140 states and 181 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-19 14:31:14,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:31:14,516 INFO L93 Difference]: Finished difference Result 260 states and 340 transitions. [2021-11-19 14:31:14,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:31:14,516 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 39 [2021-11-19 14:31:14,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:31:14,518 INFO L225 Difference]: With dead ends: 260 [2021-11-19 14:31:14,518 INFO L226 Difference]: Without dead ends: 147 [2021-11-19 14:31:14,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:31:14,520 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 8 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:31:14,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 202 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:31:14,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-11-19 14:31:14,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 140. [2021-11-19 14:31:14,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 110 states have (on average 1.2363636363636363) internal successors, (136), 115 states have internal predecessors, (136), 17 states have call successors, (17), 10 states have call predecessors, (17), 12 states have return successors, (26), 14 states have call predecessors, (26), 16 states have call successors, (26) [2021-11-19 14:31:14,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 179 transitions. [2021-11-19 14:31:14,536 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 179 transitions. Word has length 39 [2021-11-19 14:31:14,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:31:14,537 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 179 transitions. [2021-11-19 14:31:14,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-19 14:31:14,537 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 179 transitions. [2021-11-19 14:31:14,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-19 14:31:14,538 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:31:14,538 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:31:14,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-19 14:31:14,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:31:14,757 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:31:14,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:31:14,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1033812007, now seen corresponding path program 1 times [2021-11-19 14:31:14,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:31:14,758 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1734751026] [2021-11-19 14:31:14,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:31:14,758 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:31:14,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:31:14,759 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:31:14,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-19 14:31:14,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:31:14,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:31:14,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:31:14,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:31:14,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:31:15,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:31:15,021 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:31:15,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1734751026] [2021-11-19 14:31:15,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1734751026] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:31:15,022 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:31:15,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-19 14:31:15,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771561042] [2021-11-19 14:31:15,022 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:31:15,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:31:15,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:31:15,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:31:15,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:31:15,023 INFO L87 Difference]: Start difference. First operand 140 states and 179 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-19 14:31:15,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:31:15,079 INFO L93 Difference]: Finished difference Result 235 states and 296 transitions. [2021-11-19 14:31:15,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:31:15,080 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 39 [2021-11-19 14:31:15,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:31:15,081 INFO L225 Difference]: With dead ends: 235 [2021-11-19 14:31:15,081 INFO L226 Difference]: Without dead ends: 105 [2021-11-19 14:31:15,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:31:15,082 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 6 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:31:15,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 255 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:31:15,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-19 14:31:15,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 98. [2021-11-19 14:31:15,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 76 states have (on average 1.1578947368421053) internal successors, (88), 77 states have internal predecessors, (88), 12 states have call successors, (12), 9 states have call predecessors, (12), 9 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2021-11-19 14:31:15,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 113 transitions. [2021-11-19 14:31:15,093 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 113 transitions. Word has length 39 [2021-11-19 14:31:15,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:31:15,093 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 113 transitions. [2021-11-19 14:31:15,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-19 14:31:15,093 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 113 transitions. [2021-11-19 14:31:15,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-19 14:31:15,094 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:31:15,094 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:31:15,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-19 14:31:15,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:31:15,297 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:31:15,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:31:15,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1045188466, now seen corresponding path program 1 times [2021-11-19 14:31:15,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:31:15,298 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1039678706] [2021-11-19 14:31:15,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:31:15,298 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:31:15,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:31:15,301 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:31:15,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 14:31:15,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:31:15,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-19 14:31:15,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:31:16,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:31:16,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:31:16,424 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:31:16,425 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:31:16,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1039678706] [2021-11-19 14:31:16,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1039678706] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:31:16,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [13004387] [2021-11-19 14:31:16,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:31:16,425 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:31:16,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:31:16,428 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:31:16,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-19 14:31:16,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:31:16,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-19 14:31:16,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:31:16,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:16,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:16,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:16,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:16,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:16,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:16,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 35 [2021-11-19 14:31:16,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:16,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:16,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:16,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:16,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:16,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:16,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 37 [2021-11-19 14:31:19,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:31:19,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:31:20,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:31:20,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [13004387] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:31:20,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839093097] [2021-11-19 14:31:20,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:31:20,139 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:31:20,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:31:20,153 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:31:20,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-19 14:31:20,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:31:20,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-19 14:31:20,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:31:20,368 INFO L354 Elim1Store]: treesize reduction 157, result has 14.2 percent of original size [2021-11-19 14:31:20,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 63 [2021-11-19 14:31:20,470 INFO L354 Elim1Store]: treesize reduction 157, result has 15.1 percent of original size [2021-11-19 14:31:20,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 71 [2021-11-19 14:31:28,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:31:28,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:31:29,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:31:29,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839093097] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:31:29,081 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:31:29,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 14, 8, 11, 8] total 33 [2021-11-19 14:31:29,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404408188] [2021-11-19 14:31:29,082 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:31:29,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-19 14:31:29,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:31:29,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-19 14:31:29,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=898, Unknown=4, NotChecked=0, Total=1056 [2021-11-19 14:31:29,084 INFO L87 Difference]: Start difference. First operand 98 states and 113 transitions. Second operand has 33 states, 30 states have (on average 2.933333333333333) internal successors, (88), 32 states have internal predecessors, (88), 9 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (9), 6 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-19 14:31:29,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:31:29,548 INFO L93 Difference]: Finished difference Result 180 states and 211 transitions. [2021-11-19 14:31:29,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-19 14:31:29,548 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 30 states have (on average 2.933333333333333) internal successors, (88), 32 states have internal predecessors, (88), 9 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (9), 6 states have call predecessors, (9), 7 states have call successors, (9) Word has length 41 [2021-11-19 14:31:29,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:31:29,550 INFO L225 Difference]: With dead ends: 180 [2021-11-19 14:31:29,550 INFO L226 Difference]: Without dead ends: 110 [2021-11-19 14:31:29,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 208 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=168, Invalid=1018, Unknown=4, NotChecked=0, Total=1190 [2021-11-19 14:31:29,551 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 58 mSDsluCounter, 690 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:31:29,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 751 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 95 Invalid, 0 Unknown, 125 Unchecked, 0.3s Time] [2021-11-19 14:31:29,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-11-19 14:31:29,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 97. [2021-11-19 14:31:29,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 75 states have (on average 1.1466666666666667) internal successors, (86), 76 states have internal predecessors, (86), 12 states have call successors, (12), 9 states have call predecessors, (12), 9 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2021-11-19 14:31:29,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 110 transitions. [2021-11-19 14:31:29,563 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 110 transitions. Word has length 41 [2021-11-19 14:31:29,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:31:29,564 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 110 transitions. [2021-11-19 14:31:29,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 30 states have (on average 2.933333333333333) internal successors, (88), 32 states have internal predecessors, (88), 9 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (9), 6 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-19 14:31:29,564 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 110 transitions. [2021-11-19 14:31:29,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-19 14:31:29,565 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:31:29,565 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:31:29,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-19 14:31:29,783 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2021-11-19 14:31:29,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-19 14:31:30,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:31:30,181 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:31:30,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:31:30,182 INFO L85 PathProgramCache]: Analyzing trace with hash 964483973, now seen corresponding path program 1 times [2021-11-19 14:31:30,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:31:30,182 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2044087115] [2021-11-19 14:31:30,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:31:30,183 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:31:30,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:31:30,183 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:31:30,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-19 14:31:30,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:31:30,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:31:30,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:31:30,417 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 14:31:30,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:31:30,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 14:31:30,554 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:31:30,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2044087115] [2021-11-19 14:31:30,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2044087115] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:31:30,555 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:31:30,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 14 [2021-11-19 14:31:30,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378816260] [2021-11-19 14:31:30,555 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:31:30,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 14:31:30,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:31:30,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 14:31:30,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:31:30,557 INFO L87 Difference]: Start difference. First operand 97 states and 110 transitions. Second operand has 14 states, 12 states have (on average 3.25) internal successors, (39), 10 states have internal predecessors, (39), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 14:31:30,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:31:30,635 INFO L93 Difference]: Finished difference Result 109 states and 123 transitions. [2021-11-19 14:31:30,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:31:30,636 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 3.25) internal successors, (39), 10 states have internal predecessors, (39), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 42 [2021-11-19 14:31:30,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:31:30,637 INFO L225 Difference]: With dead ends: 109 [2021-11-19 14:31:30,637 INFO L226 Difference]: Without dead ends: 107 [2021-11-19 14:31:30,638 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-11-19 14:31:30,638 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 16 mSDsluCounter, 635 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 700 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:31:30,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 700 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:31:30,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-11-19 14:31:30,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2021-11-19 14:31:30,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 81 states have (on average 1.1358024691358024) internal successors, (92), 83 states have internal predecessors, (92), 13 states have call successors, (13), 10 states have call predecessors, (13), 11 states have return successors, (15), 12 states have call predecessors, (15), 12 states have call successors, (15) [2021-11-19 14:31:30,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 120 transitions. [2021-11-19 14:31:30,656 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 120 transitions. Word has length 42 [2021-11-19 14:31:30,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:31:30,657 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 120 transitions. [2021-11-19 14:31:30,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 3.25) internal successors, (39), 10 states have internal predecessors, (39), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 14:31:30,658 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 120 transitions. [2021-11-19 14:31:30,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-19 14:31:30,658 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:31:30,659 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:31:30,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-19 14:31:30,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:31:30,873 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:31:30,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:31:30,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1440497479, now seen corresponding path program 1 times [2021-11-19 14:31:30,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:31:30,874 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1572370133] [2021-11-19 14:31:30,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:31:30,874 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:31:30,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:31:30,875 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:31:30,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-19 14:31:31,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:31:31,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-19 14:31:31,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:31:31,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:31,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:31,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:31,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:31,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:31,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:31,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 35 [2021-11-19 14:31:31,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:31,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:31,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:31,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:31,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:31,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:31,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 37 [2021-11-19 14:31:33,444 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 14:31:33,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:31:34,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2021-11-19 14:31:34,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2021-11-19 14:31:34,979 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 14:31:34,979 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:31:34,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1572370133] [2021-11-19 14:31:34,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1572370133] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:31:34,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [242934873] [2021-11-19 14:31:34,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:31:34,980 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:31:34,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:31:34,980 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:31:34,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-19 14:31:35,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:31:35,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-19 14:31:35,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:31:35,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:35,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:35,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:35,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:35,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:35,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:35,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 35 [2021-11-19 14:31:35,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:35,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:35,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:35,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:35,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:35,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:35,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 37 [2021-11-19 14:31:37,446 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 14:31:37,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:31:38,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2021-11-19 14:31:38,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2021-11-19 14:31:38,515 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 14:31:38,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [242934873] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:31:38,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314334277] [2021-11-19 14:31:38,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:31:38,516 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:31:38,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:31:38,517 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:31:38,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-19 14:31:38,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:31:38,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-19 14:31:38,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:31:38,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:38,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:38,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:38,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:38,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:38,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:38,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 35 [2021-11-19 14:31:38,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:38,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:38,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:38,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:38,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:38,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:38,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 37 [2021-11-19 14:31:40,599 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 14:31:40,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:31:41,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2021-11-19 14:31:41,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2021-11-19 14:31:41,458 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 14:31:41,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314334277] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:31:41,459 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:31:41,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 13, 8, 12, 8] total 19 [2021-11-19 14:31:41,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501252083] [2021-11-19 14:31:41,459 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:31:41,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 14:31:41,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:31:41,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 14:31:41,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-11-19 14:31:41,461 INFO L87 Difference]: Start difference. First operand 106 states and 120 transitions. Second operand has 19 states, 15 states have (on average 4.133333333333334) internal successors, (62), 18 states have internal predecessors, (62), 11 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-19 14:31:42,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:31:42,271 INFO L93 Difference]: Finished difference Result 198 states and 228 transitions. [2021-11-19 14:31:42,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-19 14:31:42,273 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 4.133333333333334) internal successors, (62), 18 states have internal predecessors, (62), 11 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) Word has length 50 [2021-11-19 14:31:42,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:31:42,274 INFO L225 Difference]: With dead ends: 198 [2021-11-19 14:31:42,274 INFO L226 Difference]: Without dead ends: 122 [2021-11-19 14:31:42,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 273 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-11-19 14:31:42,275 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 51 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:31:42,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 533 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 138 Invalid, 0 Unknown, 68 Unchecked, 0.7s Time] [2021-11-19 14:31:42,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-11-19 14:31:42,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 117. [2021-11-19 14:31:42,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 90 states have (on average 1.1555555555555554) internal successors, (104), 92 states have internal predecessors, (104), 14 states have call successors, (14), 11 states have call predecessors, (14), 12 states have return successors, (16), 13 states have call predecessors, (16), 13 states have call successors, (16) [2021-11-19 14:31:42,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 134 transitions. [2021-11-19 14:31:42,288 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 134 transitions. Word has length 50 [2021-11-19 14:31:42,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:31:42,289 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 134 transitions. [2021-11-19 14:31:42,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 4.133333333333334) internal successors, (62), 18 states have internal predecessors, (62), 11 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-19 14:31:42,289 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 134 transitions. [2021-11-19 14:31:42,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-19 14:31:42,290 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:31:42,290 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:31:42,301 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (21)] Ended with exit code 0 [2021-11-19 14:31:42,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-19 14:31:42,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-19 14:31:42,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:31:42,895 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:31:42,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:31:42,895 INFO L85 PathProgramCache]: Analyzing trace with hash 2080562516, now seen corresponding path program 2 times [2021-11-19 14:31:42,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:31:42,895 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [484804849] [2021-11-19 14:31:42,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:31:42,896 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:31:42,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:31:42,896 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:31:42,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-19 14:31:43,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:31:43,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:31:43,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-19 14:31:43,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:31:43,472 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 14:31:43,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:31:43,966 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-19 14:31:43,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 32 treesize of output 31 [2021-11-19 14:31:43,977 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-11-19 14:31:43,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 19 [2021-11-19 14:31:44,027 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 14:31:44,028 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:31:44,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [484804849] [2021-11-19 14:31:44,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [484804849] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:31:44,028 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:31:44,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 11 [2021-11-19 14:31:44,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593041894] [2021-11-19 14:31:44,029 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:31:44,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:31:44,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:31:44,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:31:44,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:31:44,030 INFO L87 Difference]: Start difference. First operand 117 states and 134 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 14:31:44,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:31:44,595 INFO L93 Difference]: Finished difference Result 212 states and 246 transitions. [2021-11-19 14:31:44,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 14:31:44,597 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 52 [2021-11-19 14:31:44,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:31:44,598 INFO L225 Difference]: With dead ends: 212 [2021-11-19 14:31:44,598 INFO L226 Difference]: Without dead ends: 139 [2021-11-19 14:31:44,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-11-19 14:31:44,600 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 32 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:31:44,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 382 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 105 Invalid, 0 Unknown, 6 Unchecked, 0.2s Time] [2021-11-19 14:31:44,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-11-19 14:31:44,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 124. [2021-11-19 14:31:44,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 95 states have (on average 1.1473684210526316) internal successors, (109), 98 states have internal predecessors, (109), 14 states have call successors, (14), 11 states have call predecessors, (14), 14 states have return successors, (18), 14 states have call predecessors, (18), 13 states have call successors, (18) [2021-11-19 14:31:44,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 141 transitions. [2021-11-19 14:31:44,615 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 141 transitions. Word has length 52 [2021-11-19 14:31:44,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:31:44,615 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 141 transitions. [2021-11-19 14:31:44,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 14:31:44,615 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 141 transitions. [2021-11-19 14:31:44,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-19 14:31:44,616 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:31:44,617 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:31:44,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-19 14:31:44,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:31:44,833 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:31:44,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:31:44,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1069445266, now seen corresponding path program 1 times [2021-11-19 14:31:44,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:31:44,834 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [10048041] [2021-11-19 14:31:44,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:31:44,834 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:31:44,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:31:44,835 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:31:44,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-19 14:31:45,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:31:45,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:31:45,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:31:45,095 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 14:31:45,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:31:45,205 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 14:31:45,206 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:31:45,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [10048041] [2021-11-19 14:31:45,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [10048041] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:31:45,206 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:31:45,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-19 14:31:45,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262607411] [2021-11-19 14:31:45,206 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:31:45,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:31:45,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:31:45,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:31:45,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:31:45,207 INFO L87 Difference]: Start difference. First operand 124 states and 141 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 14:31:45,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:31:45,238 INFO L93 Difference]: Finished difference Result 199 states and 229 transitions. [2021-11-19 14:31:45,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:31:45,239 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 52 [2021-11-19 14:31:45,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:31:45,240 INFO L225 Difference]: With dead ends: 199 [2021-11-19 14:31:45,240 INFO L226 Difference]: Without dead ends: 114 [2021-11-19 14:31:45,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:31:45,241 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 0 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:31:45,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 266 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:31:45,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-11-19 14:31:45,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2021-11-19 14:31:45,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 88 states have (on average 1.125) internal successors, (99), 90 states have internal predecessors, (99), 13 states have call successors, (13), 11 states have call predecessors, (13), 12 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2021-11-19 14:31:45,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 126 transitions. [2021-11-19 14:31:45,254 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 126 transitions. Word has length 52 [2021-11-19 14:31:45,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:31:45,255 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 126 transitions. [2021-11-19 14:31:45,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 14:31:45,255 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 126 transitions. [2021-11-19 14:31:45,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-19 14:31:45,256 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:31:45,256 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:31:45,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-19 14:31:45,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:31:45,465 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:31:45,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:31:45,465 INFO L85 PathProgramCache]: Analyzing trace with hash -41969126, now seen corresponding path program 1 times [2021-11-19 14:31:45,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:31:45,466 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1873079859] [2021-11-19 14:31:45,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:31:45,467 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:31:45,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:31:45,467 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:31:45,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-19 14:31:45,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:31:45,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-19 14:31:45,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:31:46,886 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:31:46,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:31:48,125 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:31:48,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 39 [2021-11-19 14:31:48,144 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:31:48,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 38 [2021-11-19 14:31:48,377 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 14:31:48,377 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:31:48,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1873079859] [2021-11-19 14:31:48,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1873079859] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:31:48,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [674968097] [2021-11-19 14:31:48,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:31:48,378 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:31:48,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:31:48,378 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:31:48,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-19 14:31:48,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:31:48,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-19 14:31:48,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:31:48,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:48,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:48,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:48,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:48,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:48,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:48,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 37 [2021-11-19 14:31:48,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:48,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:48,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:48,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:48,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:48,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:48,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 35 [2021-11-19 14:31:53,748 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:31:53,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:31:55,456 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 14:31:55,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [674968097] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:31:55,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933678690] [2021-11-19 14:31:55,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:31:55,457 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:31:55,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:31:55,458 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:31:55,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-19 14:31:55,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:31:55,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-19 14:31:55,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:31:55,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:55,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:55,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:55,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:55,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:55,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:55,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 35 [2021-11-19 14:31:55,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:55,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:55,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:55,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:55,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:55,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:55,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 37 [2021-11-19 14:32:00,276 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:32:00,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:32:13,024 WARN L227 SmtUtils]: Spent 10.05s on a formula simplification that was a NOOP. DAG size: 20 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 14:32:23,400 WARN L227 SmtUtils]: Spent 10.04s on a formula simplification that was a NOOP. DAG size: 22 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 14:32:24,813 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 14:32:24,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933678690] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:32:24,814 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:32:24,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 17, 13, 22, 18] total 48 [2021-11-19 14:32:24,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506105600] [2021-11-19 14:32:24,814 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:32:24,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-19 14:32:24,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:32:24,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-19 14:32:24,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=2033, Unknown=1, NotChecked=0, Total=2256 [2021-11-19 14:32:24,817 INFO L87 Difference]: Start difference. First operand 114 states and 126 transitions. Second operand has 48 states, 43 states have (on average 2.813953488372093) internal successors, (121), 41 states have internal predecessors, (121), 16 states have call successors, (23), 6 states have call predecessors, (23), 12 states have return successors, (21), 15 states have call predecessors, (21), 13 states have call successors, (21) [2021-11-19 14:32:26,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:32:26,097 INFO L93 Difference]: Finished difference Result 149 states and 164 transitions. [2021-11-19 14:32:26,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-19 14:32:26,098 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 43 states have (on average 2.813953488372093) internal successors, (121), 41 states have internal predecessors, (121), 16 states have call successors, (23), 6 states have call predecessors, (23), 12 states have return successors, (21), 15 states have call predecessors, (21), 13 states have call successors, (21) Word has length 58 [2021-11-19 14:32:26,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:32:26,099 INFO L225 Difference]: With dead ends: 149 [2021-11-19 14:32:26,099 INFO L226 Difference]: Without dead ends: 147 [2021-11-19 14:32:26,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 286 SyntacticMatches, 11 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1002 ImplicationChecksByTransitivity, 31.0s TimeCoverageRelationStatistics Valid=258, Invalid=2497, Unknown=1, NotChecked=0, Total=2756 [2021-11-19 14:32:26,100 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 46 mSDsluCounter, 1004 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 1052 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:32:26,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 1052 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 165 Invalid, 0 Unknown, 111 Unchecked, 0.8s Time] [2021-11-19 14:32:26,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-11-19 14:32:26,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 141. [2021-11-19 14:32:26,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 107 states have (on average 1.1214953271028036) internal successors, (120), 108 states have internal predecessors, (120), 17 states have call successors, (17), 15 states have call predecessors, (17), 16 states have return successors, (19), 17 states have call predecessors, (19), 16 states have call successors, (19) [2021-11-19 14:32:26,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 156 transitions. [2021-11-19 14:32:26,116 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 156 transitions. Word has length 58 [2021-11-19 14:32:26,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:32:26,116 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 156 transitions. [2021-11-19 14:32:26,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 43 states have (on average 2.813953488372093) internal successors, (121), 41 states have internal predecessors, (121), 16 states have call successors, (23), 6 states have call predecessors, (23), 12 states have return successors, (21), 15 states have call predecessors, (21), 13 states have call successors, (21) [2021-11-19 14:32:26,117 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 156 transitions. [2021-11-19 14:32:26,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-19 14:32:26,118 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:32:26,118 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:32:26,147 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2021-11-19 14:32:26,337 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (26)] Ended with exit code 0 [2021-11-19 14:32:26,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-19 14:32:26,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:32:26,735 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:32:26,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:32:26,735 INFO L85 PathProgramCache]: Analyzing trace with hash 81677432, now seen corresponding path program 2 times [2021-11-19 14:32:26,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:32:26,736 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1802569639] [2021-11-19 14:32:26,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:32:26,736 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:32:26,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:32:26,737 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:32:26,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-19 14:32:26,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:32:26,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:32:27,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-19 14:32:27,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:32:27,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:27,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:27,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:27,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:27,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:27,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:27,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 35 [2021-11-19 14:32:27,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:27,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:27,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:27,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:27,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:27,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:27,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 37 [2021-11-19 14:32:29,692 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 14:32:29,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:32:31,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2021-11-19 14:32:31,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2021-11-19 14:32:31,385 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:32:31,386 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:32:31,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1802569639] [2021-11-19 14:32:31,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1802569639] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:32:31,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2015471037] [2021-11-19 14:32:31,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:32:31,386 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:32:31,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:32:31,387 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:32:31,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-19 14:32:31,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:32:31,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:32:31,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-19 14:32:31,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:32:31,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:31,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:31,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:31,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:31,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:31,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:31,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 35 [2021-11-19 14:32:31,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:31,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:31,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:31,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:31,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:31,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:31,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 37 [2021-11-19 14:32:34,323 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 14:32:34,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:32:36,498 INFO L354 Elim1Store]: treesize reduction 26, result has 13.3 percent of original size [2021-11-19 14:32:36,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 3806 treesize of output 3635 [2021-11-19 14:32:36,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 344 treesize of output 332 [2021-11-19 14:32:36,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 739 treesize of output 715 [2021-11-19 14:32:36,683 INFO L354 Elim1Store]: treesize reduction 25, result has 13.8 percent of original size [2021-11-19 14:32:36,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1824 treesize of output 1792 [2021-11-19 14:32:37,117 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:32:37,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2015471037] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:32:37,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102415413] [2021-11-19 14:32:37,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:32:37,117 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:32:37,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:32:37,121 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:32:37,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-19 14:32:37,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:32:37,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:32:37,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-19 14:32:37,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:32:37,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:37,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:37,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:37,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:37,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:37,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:37,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 37 [2021-11-19 14:32:37,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:37,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:37,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:37,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:37,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:37,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:37,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 35 [2021-11-19 14:32:41,813 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 14:32:41,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:33:14,039 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse7 (select (select |c_#memory_$Pointer$.base| |c_aws_linked_list_node_next_is_valid_#in~node.base|) |c_aws_linked_list_node_next_is_valid_#in~node.offset|)) (.cse8 (bvadd (_ bv8 64) (select (select |c_#memory_$Pointer$.offset| |c_aws_linked_list_node_next_is_valid_#in~node.base|) |c_aws_linked_list_node_next_is_valid_#in~node.offset|)))) (or (forall ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_32| (_ BitVec 64)) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_35| (_ BitVec 64))) (exists ((|v_aws_linked_list_node_next_is_valid_#in~node.base_137| (_ BitVec 64))) (let ((.cse3 (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_35|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_32|))) (let ((.cse2 (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_node_next_is_valid_#in~node.base_137|) .cse3))) (let ((.cse1 (bvadd (_ bv8 64) .cse2)) (.cse0 (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_node_next_is_valid_#in~node.base_137|) .cse3))) (and (= |v_aws_linked_list_node_next_is_valid_#in~node.base_137| (select (select |c_#memory_$Pointer$.base| .cse0) .cse1)) (= .cse2 (bvadd |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_32| (_ bv16 64))) (= .cse3 (select (select |c_#memory_$Pointer$.offset| .cse0) .cse1)) (= |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_35| .cse0))))))) (exists ((|aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base| (_ BitVec 64))) (let ((.cse6 (select (select |c_#memory_$Pointer$.offset| |aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base|) |c_aws_linked_list_node_next_is_valid_#in~node.offset|))) (let ((.cse4 (select (select |c_#memory_$Pointer$.base| |aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base|) |c_aws_linked_list_node_next_is_valid_#in~node.offset|)) (.cse5 (bvadd (_ bv8 64) .cse6))) (and (= (select (select |c_#memory_$Pointer$.offset| .cse4) .cse5) |c_aws_linked_list_node_next_is_valid_#in~node.offset|) (= .cse4 (select (select |c_#memory_$Pointer$.base| |c_aws_linked_list_node_next_is_valid_#in~node.base|) |c_aws_linked_list_node_next_is_valid_#in~node.offset|)) (= (select (select |c_#memory_$Pointer$.base| .cse4) .cse5) |aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base|) (= .cse6 (select (select |c_#memory_$Pointer$.offset| |c_aws_linked_list_node_next_is_valid_#in~node.base|) |c_aws_linked_list_node_next_is_valid_#in~node.offset|)))))) (not (= |c_aws_linked_list_node_next_is_valid_#in~node.base| (select (select |c_#memory_$Pointer$.base| .cse7) .cse8))) (not (= (select (select |c_#memory_$Pointer$.offset| .cse7) .cse8) |c_aws_linked_list_node_next_is_valid_#in~node.offset|)))) is different from true [2021-11-19 14:33:29,318 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_node_next_is_valid_#in~node.base_137| (_ BitVec 64))) (let ((.cse0 (select (select |c_#memory_$Pointer$.offset| |c_aws_linked_list_is_valid_#in~list#1.base|) |c_aws_linked_list_is_valid_#in~list#1.offset|))) (let ((.cse3 (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_node_next_is_valid_#in~node.base_137|) .cse0))) (let ((.cse1 (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_node_next_is_valid_#in~node.base_137|) .cse0)) (.cse2 (bvadd (_ bv8 64) .cse3))) (and (= .cse0 (select (select |c_#memory_$Pointer$.offset| .cse1) .cse2)) (= .cse1 |c_aws_linked_list_is_valid_#in~list#1.base|) (= (bvadd |c_aws_linked_list_is_valid_#in~list#1.offset| (_ bv16 64)) .cse3) (= |v_aws_linked_list_node_next_is_valid_#in~node.base_137| (select (select |c_#memory_$Pointer$.base| .cse1) .cse2))))))) (forall ((|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_208| (_ BitVec 64))) (let ((.cse4 (select (select |c_#memory_$Pointer$.offset| |c_aws_linked_list_is_valid_#in~list#1.base|) |c_aws_linked_list_is_valid_#in~list#1.offset|))) (let ((.cse7 (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_208|) .cse4))) (let ((.cse6 (bvadd (_ bv8 64) .cse7)) (.cse5 (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_208|) .cse4))) (or (not (= .cse4 (select (select |c_#memory_$Pointer$.offset| .cse5) .cse6))) (not (= |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_208| (select (select |c_#memory_$Pointer$.base| .cse5) .cse6))) (not (= .cse7 (bvadd |c_aws_linked_list_is_valid_#in~list#1.offset| (_ bv16 64)))) (not (= .cse5 |c_aws_linked_list_is_valid_#in~list#1.base|)))))))) is different from true [2021-11-19 14:33:30,682 INFO L354 Elim1Store]: treesize reduction 294, result has 0.3 percent of original size [2021-11-19 14:33:30,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 621567 treesize of output 1 [2021-11-19 14:33:30,716 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 14:33:30,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102415413] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:33:30,716 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:33:30,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 13, 12, 17, 15] total 52 [2021-11-19 14:33:30,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131636120] [2021-11-19 14:33:30,716 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:33:30,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-19 14:33:30,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:33:30,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-19 14:33:30,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=2246, Unknown=6, NotChecked=194, Total=2652 [2021-11-19 14:33:30,719 INFO L87 Difference]: Start difference. First operand 141 states and 156 transitions. Second operand has 52 states, 46 states have (on average 3.5) internal successors, (161), 46 states have internal predecessors, (161), 21 states have call successors, (28), 7 states have call predecessors, (28), 11 states have return successors, (26), 15 states have call predecessors, (26), 19 states have call successors, (26) [2021-11-19 14:34:18,927 WARN L227 SmtUtils]: Spent 6.34s on a formula simplification that was a NOOP. DAG size: 70 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 14:34:49,535 WARN L228 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-11-19 14:34:49,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-19 14:34:49,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 355 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1001 ImplicationChecksByTransitivity, 92.1s TimeCoverageRelationStatistics Valid=246, Invalid=2599, Unknown=25, NotChecked=210, Total=3080 [2021-11-19 14:34:49,537 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 9 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:34:49,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 423 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 130 Unchecked, 1.0s Time] [2021-11-19 14:34:49,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2021-11-19 14:34:49,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-19 14:34:49,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-19 14:34:49,940 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (29)] Ended with exit code 0 [2021-11-19 14:34:50,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:34:50,139 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:241) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:260) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.checkSat(ManagedScript.java:139) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker.checkImplication(MonolithicImplicationChecker.java:85) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.compare(PredicateUnifier.java:934) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.(PredicateUnifier.java:773) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:345) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:388) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:229) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.getOrConstructPredicate(DeterministicInterpolantAutomaton.java:282) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.constructSuccessorsAndTransitions(DeterministicInterpolantAutomaton.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.callSuccessors(AbstractInterpolantAutomaton.java:256) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.callSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.callSuccessors(TotalizeNwa.java:260) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.callSuccessors(ComplementDeterministicNwa.java:131) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.callSuccessors(ProductNwa.java:252) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.callSuccessors(ProductNwa.java:244) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addCallsAndSuccessors(NestedWordAutomatonReachableStates.java:1082) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:961) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:868) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:784) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1465) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:658) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:237) ... 49 more [2021-11-19 14:34:50,143 INFO L158 Benchmark]: Toolchain (without parser) took 256072.13ms. Allocated memory was 81.8MB in the beginning and 224.4MB in the end (delta: 142.6MB). Free memory was 60.7MB in the beginning and 157.0MB in the end (delta: -96.3MB). Peak memory consumption was 44.6MB. Max. memory is 16.1GB. [2021-11-19 14:34:50,143 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 81.8MB. Free memory was 63.8MB in the beginning and 63.7MB in the end (delta: 42.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:34:50,144 INFO L158 Benchmark]: CACSL2BoogieTranslator took 3061.25ms. Allocated memory was 81.8MB in the beginning and 123.7MB in the end (delta: 41.9MB). Free memory was 60.5MB in the beginning and 57.5MB in the end (delta: 3.0MB). Peak memory consumption was 63.5MB. Max. memory is 16.1GB. [2021-11-19 14:34:50,144 INFO L158 Benchmark]: Boogie Procedure Inliner took 172.76ms. Allocated memory is still 123.7MB. Free memory was 57.5MB in the beginning and 51.9MB in the end (delta: 5.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-19 14:34:50,144 INFO L158 Benchmark]: Boogie Preprocessor took 96.11ms. Allocated memory is still 123.7MB. Free memory was 51.9MB in the beginning and 49.1MB in the end (delta: 2.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-19 14:34:50,144 INFO L158 Benchmark]: RCFGBuilder took 632.27ms. Allocated memory is still 123.7MB. Free memory was 49.1MB in the beginning and 66.1MB in the end (delta: -16.9MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-11-19 14:34:50,145 INFO L158 Benchmark]: TraceAbstraction took 252103.34ms. Allocated memory was 123.7MB in the beginning and 224.4MB in the end (delta: 100.7MB). Free memory was 65.5MB in the beginning and 157.0MB in the end (delta: -91.5MB). Peak memory consumption was 9.4MB. Max. memory is 16.1GB. [2021-11-19 14:34:50,147 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 81.8MB. Free memory was 63.8MB in the beginning and 63.7MB in the end (delta: 42.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 3061.25ms. Allocated memory was 81.8MB in the beginning and 123.7MB in the end (delta: 41.9MB). Free memory was 60.5MB in the beginning and 57.5MB in the end (delta: 3.0MB). Peak memory consumption was 63.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 172.76ms. Allocated memory is still 123.7MB. Free memory was 57.5MB in the beginning and 51.9MB in the end (delta: 5.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 96.11ms. Allocated memory is still 123.7MB. Free memory was 51.9MB in the beginning and 49.1MB in the end (delta: 2.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 632.27ms. Allocated memory is still 123.7MB. Free memory was 49.1MB in the beginning and 66.1MB in the end (delta: -16.9MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * TraceAbstraction took 252103.34ms. Allocated memory was 123.7MB in the beginning and 224.4MB in the end (delta: 100.7MB). Free memory was 65.5MB in the beginning and 157.0MB in the end (delta: -91.5MB). Peak memory consumption was 9.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:241) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2832cafa-33d3-49e5-9798-9c5f707ea679/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory")