./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness-1.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF --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 e96d8d92db1667c6f6142560a7fad2417327f7e06eb532366f9ad7d4ddd7d1f5 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:30:57,895 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:30:57,898 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:30:57,934 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:30:57,935 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:30:57,941 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:30:57,944 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:30:57,948 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:30:57,951 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:30:57,956 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:30:57,958 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:30:57,959 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:30:57,960 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:30:57,963 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:30:57,965 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:30:57,968 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:30:57,969 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:30:57,970 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:30:57,975 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:30:57,983 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:30:57,985 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:30:57,986 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:30:57,989 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:30:57,990 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:30:57,994 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:30:57,995 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:30:57,995 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:30:57,997 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:30:57,998 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:30:57,999 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:30:58,000 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:30:58,001 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:30:58,003 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:30:58,004 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:30:58,005 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:30:58,006 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:30:58,006 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:30:58,007 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:30:58,007 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:30:58,008 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:30:58,009 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:30:58,009 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-12 22:30:58,056 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:30:58,056 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:30:58,058 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:30:58,058 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:30:58,058 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:30:58,059 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:30:58,059 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:30:58,059 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 22:30:58,059 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:30:58,060 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:30:58,061 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 22:30:58,061 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 22:30:58,061 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:30:58,061 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 22:30:58,062 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 22:30:58,062 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 22:30:58,063 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:30:58,063 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 22:30:58,063 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:30:58,064 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:30:58,064 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:30:58,064 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:30:58,064 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:30:58,065 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:30:58,065 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:30:58,065 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:30:58,065 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:30:58,066 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:30:58,066 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:30:58,067 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:30:58,068 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:30:58,068 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:30:58,068 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 22:30:58,068 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 22:30:58,069 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:30:58,069 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:30:58,069 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:30:58,069 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_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e96d8d92db1667c6f6142560a7fad2417327f7e06eb532366f9ad7d4ddd7d1f5 [2021-11-12 22:30:58,371 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:30:58,390 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:30:58,393 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:30:58,394 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:30:58,395 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:30:58,396 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness-1.i [2021-11-12 22:30:58,464 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/data/031606b20/54eb7993d8da4c9086d778db547be65f/FLAG2dffecdfd [2021-11-12 22:30:59,394 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:30:59,395 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness-1.i [2021-11-12 22:30:59,445 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/data/031606b20/54eb7993d8da4c9086d778db547be65f/FLAG2dffecdfd [2021-11-12 22:30:59,845 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/data/031606b20/54eb7993d8da4c9086d778db547be65f [2021-11-12 22:30:59,847 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:30:59,848 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:30:59,850 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:30:59,850 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:30:59,869 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:30:59,870 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:30:59" (1/1) ... [2021-11-12 22:30:59,871 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4622869a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:30:59, skipping insertion in model container [2021-11-12 22:30:59,871 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:30:59" (1/1) ... [2021-11-12 22:30:59,878 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:30:59,961 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:31:00,303 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness-1.i[4500,4513] [2021-11-12 22:31:00,311 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness-1.i[4560,4573] [2021-11-12 22:31:00,337 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-12 22:31:00,346 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-12 22:31:01,153 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:31:01,158 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:31:01,159 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:31:01,160 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:31:01,162 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:31:01,182 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:31:01,183 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:31:01,185 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:31:01,186 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:31:01,188 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:31:01,189 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:31:01,190 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:31:01,191 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:31:01,536 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-12 22:31:01,537 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-12 22:31:01,538 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-12 22:31:01,539 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-12 22:31:01,541 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-12 22:31:01,542 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-12 22:31:01,542 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-12 22:31:01,543 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-12 22:31:01,549 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-12 22:31:01,549 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-12 22:31:01,680 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-12 22:31:01,730 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:31:01,748 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) [2021-11-12 22:31:01,748 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@699d3b80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:31:01, skipping insertion in model container [2021-11-12 22:31:01,749 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:31:01,749 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 22:31:01,767 INFO L158 Benchmark]: Toolchain (without parser) took 1901.57ms. Allocated memory was 107.0MB in the beginning and 138.4MB in the end (delta: 31.5MB). Free memory was 81.3MB in the beginning and 106.0MB in the end (delta: -24.7MB). Peak memory consumption was 36.5MB. Max. memory is 16.1GB. [2021-11-12 22:31:01,768 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 107.0MB. Free memory is still 81.7MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:31:01,770 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1899.16ms. Allocated memory was 107.0MB in the beginning and 138.4MB in the end (delta: 31.5MB). Free memory was 81.1MB in the beginning and 106.0MB in the end (delta: -24.9MB). Peak memory consumption was 36.5MB. Max. memory is 16.1GB. [2021-11-12 22:31:01,772 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 107.0MB. Free memory is still 81.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1899.16ms. Allocated memory was 107.0MB in the beginning and 138.4MB in the end (delta: 31.5MB). Free memory was 81.1MB in the beginning and 106.0MB in the end (delta: -24.9MB). Peak memory consumption was 36.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 7039]: 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_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF --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 e96d8d92db1667c6f6142560a7fad2417327f7e06eb532366f9ad7d4ddd7d1f5 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:31:04,039 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:31:04,042 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:31:04,100 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:31:04,101 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:31:04,105 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:31:04,107 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:31:04,111 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:31:04,115 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:31:04,116 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:31:04,117 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:31:04,118 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:31:04,118 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:31:04,120 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:31:04,121 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:31:04,122 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:31:04,123 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:31:04,124 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:31:04,132 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:31:04,134 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:31:04,136 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:31:04,138 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:31:04,139 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:31:04,140 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:31:04,144 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:31:04,144 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:31:04,145 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:31:04,146 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:31:04,146 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:31:04,148 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:31:04,148 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:31:04,149 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:31:04,150 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:31:04,151 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:31:04,152 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:31:04,153 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:31:04,153 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:31:04,154 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:31:04,154 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:31:04,155 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:31:04,156 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:31:04,156 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-12 22:31:04,189 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:31:04,189 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:31:04,190 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:31:04,190 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:31:04,190 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:31:04,191 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:31:04,191 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:31:04,191 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:31:04,191 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:31:04,191 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:31:04,192 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:31:04,192 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:31:04,193 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:31:04,193 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:31:04,193 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:31:04,193 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:31:04,193 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 22:31:04,194 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 22:31:04,194 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:31:04,194 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:31:04,196 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:31:04,196 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:31:04,197 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 22:31:04,197 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:31:04,197 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:31:04,198 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:31:04,198 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:31:04,198 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:31:04,199 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 22:31:04,199 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 22:31:04,199 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:31:04,199 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:31:04,200 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:31:04,200 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_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e96d8d92db1667c6f6142560a7fad2417327f7e06eb532366f9ad7d4ddd7d1f5 [2021-11-12 22:31:04,604 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:31:04,624 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:31:04,626 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:31:04,627 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:31:04,628 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:31:04,630 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness-1.i [2021-11-12 22:31:04,714 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/data/58f410824/ffd5a899e21b4d0e8ce2999281a8f5b8/FLAGcc9126052 [2021-11-12 22:31:05,596 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:31:05,597 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness-1.i [2021-11-12 22:31:05,650 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/data/58f410824/ffd5a899e21b4d0e8ce2999281a8f5b8/FLAGcc9126052 [2021-11-12 22:31:06,146 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/data/58f410824/ffd5a899e21b4d0e8ce2999281a8f5b8 [2021-11-12 22:31:06,148 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:31:06,150 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:31:06,151 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:31:06,151 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:31:06,154 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:31:06,155 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:31:06" (1/1) ... [2021-11-12 22:31:06,159 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24ed85d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:31:06, skipping insertion in model container [2021-11-12 22:31:06,159 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:31:06" (1/1) ... [2021-11-12 22:31:06,166 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:31:06,275 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:31:06,591 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness-1.i[4500,4513] [2021-11-12 22:31:06,597 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness-1.i[4560,4573] [2021-11-12 22:31:06,620 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-12 22:31:06,625 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-12 22:31:07,522 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:31:07,524 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:31:07,524 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:31:07,525 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:31:07,526 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:31:07,551 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:31:07,552 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:31:07,553 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:31:07,554 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:31:07,556 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:31:07,557 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:31:07,557 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:31:07,558 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:31:07,917 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-12 22:31:07,919 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-12 22:31:07,920 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-12 22:31:07,922 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-12 22:31:07,923 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-12 22:31:07,924 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-12 22:31:07,924 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-12 22:31:07,925 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-12 22:31:07,925 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-12 22:31:07,926 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-12 22:31:08,064 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-12 22:31:08,090 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:31:08,126 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 22:31:08,167 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:31:08,172 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness-1.i[4500,4513] [2021-11-12 22:31:08,172 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness-1.i[4560,4573] [2021-11-12 22:31:08,174 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-12 22:31:08,174 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-12 22:31:08,212 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:31:08,217 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:31:08,217 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:31:08,218 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:31:08,219 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:31:08,243 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:31:08,244 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:31:08,246 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:31:08,259 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:31:08,260 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:31:08,261 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:31:08,267 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:31:08,267 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:31:08,363 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-12 22:31:08,369 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-12 22:31:08,370 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-12 22:31:08,371 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-12 22:31:08,372 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-12 22:31:08,380 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-12 22:31:08,380 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-12 22:31:08,381 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-12 22:31:08,382 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-12 22:31:08,382 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-12 22:31:08,426 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-12 22:31:08,450 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:31:08,465 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:31:08,488 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness-1.i[4500,4513] [2021-11-12 22:31:08,494 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness-1.i[4560,4573] [2021-11-12 22:31:08,496 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-12 22:31:08,504 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-12 22:31:08,571 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:31:08,571 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:31:08,572 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:31:08,572 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:31:08,573 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:31:08,579 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:31:08,580 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:31:08,580 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:31:08,581 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:31:08,582 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:31:08,582 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:31:08,583 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:31:08,583 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:31:08,613 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-12 22:31:08,614 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-12 22:31:08,614 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-12 22:31:08,615 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-12 22:31:08,616 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-12 22:31:08,616 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-12 22:31:08,616 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-12 22:31:08,617 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-12 22:31:08,617 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-12 22:31:08,618 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-12 22:31:08,636 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-12 22:31:08,649 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:31:09,062 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:31:09,062 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:31:09 WrapperNode [2021-11-12 22:31:09,063 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:31:09,064 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:31:09,064 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:31:09,064 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:31:09,071 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:31:09" (1/1) ... [2021-11-12 22:31:09,171 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:31:09" (1/1) ... [2021-11-12 22:31:09,203 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:31:09,204 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:31:09,204 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:31:09,204 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:31:09,212 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:31:09" (1/1) ... [2021-11-12 22:31:09,212 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:31:09" (1/1) ... [2021-11-12 22:31:09,218 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:31:09" (1/1) ... [2021-11-12 22:31:09,219 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:31:09" (1/1) ... [2021-11-12 22:31:09,233 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:31:09" (1/1) ... [2021-11-12 22:31:09,243 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:31:09" (1/1) ... [2021-11-12 22:31:09,248 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:31:09" (1/1) ... [2021-11-12 22:31:09,256 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:31:09,269 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:31:09,269 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:31:09,269 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:31:09,270 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:31:09" (1/1) ... [2021-11-12 22:31:09,277 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:31:09,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:31:09,300 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:31:09,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:31:09,350 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_reset [2021-11-12 22:31:09,350 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_reset [2021-11-12 22:31:09,350 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2021-11-12 22:31:09,350 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2021-11-12 22:31:09,350 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-12 22:31:09,350 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 22:31:09,350 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-12 22:31:09,354 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-12 22:31:09,354 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:31:09,355 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:31:09,355 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-12 22:31:09,355 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-12 22:31:09,355 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-12 22:31:09,355 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-12 22:31:09,355 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-12 22:31:09,356 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:31:09,356 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-12 22:31:09,888 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:31:09,888 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-12 22:31:09,889 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:31:09 BoogieIcfgContainer [2021-11-12 22:31:09,890 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:31:09,897 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:31:09,897 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:31:09,900 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:31:09,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:31:06" (1/3) ... [2021-11-12 22:31:09,901 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27743841 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:31:09, skipping insertion in model container [2021-11-12 22:31:09,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:31:09" (2/3) ... [2021-11-12 22:31:09,902 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27743841 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:31:09, skipping insertion in model container [2021-11-12 22:31:09,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:31:09" (3/3) ... [2021-11-12 22:31:09,905 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_node_reset_harness-1.i [2021-11-12 22:31:09,910 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:31:09,911 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 22:31:09,980 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:31:09,991 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 [2021-11-12 22:31:09,995 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 22:31:10,011 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 29 states have internal predecessors, (36), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-12 22:31:10,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-12 22:31:10,017 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:31:10,018 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:31:10,018 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:31:10,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:31:10,024 INFO L85 PathProgramCache]: Analyzing trace with hash -527313499, now seen corresponding path program 1 times [2021-11-12 22:31:10,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:31:10,045 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1476426030] [2021-11-12 22:31:10,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:31:10,047 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:31:10,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:31:10,053 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:31:10,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 22:31:10,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:31:10,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-12 22:31:10,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:31:10,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:31:10,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:31:10,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:31:10,459 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:31:10,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1476426030] [2021-11-12 22:31:10,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1476426030] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:31:10,461 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:31:10,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-12 22:31:10,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039316546] [2021-11-12 22:31:10,465 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:31:10,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 22:31:10,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:31:10,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 22:31:10,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 22:31:10,517 INFO L87 Difference]: Start difference. First operand has 41 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 29 states have internal predecessors, (36), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 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) [2021-11-12 22:31:10,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:31:10,539 INFO L93 Difference]: Finished difference Result 75 states and 96 transitions. [2021-11-12 22:31:10,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 22:31:10,541 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 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 20 [2021-11-12 22:31:10,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:31:10,549 INFO L225 Difference]: With dead ends: 75 [2021-11-12 22:31:10,550 INFO L226 Difference]: Without dead ends: 36 [2021-11-12 22:31:10,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 22:31:10,556 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.98ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-12 22:31:10,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.98ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-12 22:31:10,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-12 22:31:10,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-11-12 22:31:10,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-12 22:31:10,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2021-11-12 22:31:10,594 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 20 [2021-11-12 22:31:10,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:31:10,594 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2021-11-12 22:31:10,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 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) [2021-11-12 22:31:10,595 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2021-11-12 22:31:10,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-12 22:31:10,597 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:31:10,597 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] [2021-11-12 22:31:10,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 22:31:10,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:31:10,814 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:31:10,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:31:10,815 INFO L85 PathProgramCache]: Analyzing trace with hash 74286250, now seen corresponding path program 1 times [2021-11-12 22:31:10,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:31:10,816 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1440735564] [2021-11-12 22:31:10,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:31:10,816 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:31:10,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:31:10,817 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:31:10,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 22:31:10,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:31:10,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:31:10,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:31:11,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:31:11,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:31:11,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:31:11,208 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:31:11,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1440735564] [2021-11-12 22:31:11,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1440735564] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:31:11,209 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:31:11,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 22:31:11,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721249903] [2021-11-12 22:31:11,209 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:31:11,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:31:11,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:31:11,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:31:11,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:31:11,214 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-12 22:31:11,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:31:11,283 INFO L93 Difference]: Finished difference Result 64 states and 73 transitions. [2021-11-12 22:31:11,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:31:11,284 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 26 [2021-11-12 22:31:11,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:31:11,288 INFO L225 Difference]: With dead ends: 64 [2021-11-12 22:31:11,288 INFO L226 Difference]: Without dead ends: 38 [2021-11-12 22:31:11,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:31:11,291 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 4 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.95ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.64ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 39.99ms IncrementalHoareTripleChecker+Time [2021-11-12 22:31:11,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 185 Invalid, 14 Unknown, 0 Unchecked, 5.64ms Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 39.99ms Time] [2021-11-12 22:31:11,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-12 22:31:11,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-11-12 22:31:11,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.16) internal successors, (29), 26 states have internal predecessors, (29), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-12 22:31:11,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2021-11-12 22:31:11,308 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 26 [2021-11-12 22:31:11,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:31:11,308 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2021-11-12 22:31:11,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-12 22:31:11,309 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2021-11-12 22:31:11,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-12 22:31:11,310 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:31:11,311 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] [2021-11-12 22:31:11,325 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-12 22:31:11,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:31:11,519 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:31:11,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:31:11,519 INFO L85 PathProgramCache]: Analyzing trace with hash 891828778, now seen corresponding path program 1 times [2021-11-12 22:31:11,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:31:11,520 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [165245224] [2021-11-12 22:31:11,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:31:11,520 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:31:11,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:31:11,525 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:31:11,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 22:31:11,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:31:11,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 22:31:11,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:31:11,839 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:31:11,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:31:12,099 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:31:12,099 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:31:12,099 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [165245224] [2021-11-12 22:31:12,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [165245224] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:31:12,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1110776793] [2021-11-12 22:31:12,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:31:12,100 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:31:12,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:31:12,104 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:31:12,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-12 22:31:12,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:31:12,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 22:31:12,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:31:12,440 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:31:12,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:31:12,570 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:31:12,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1110776793] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:31:12,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508263368] [2021-11-12 22:31:12,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:31:12,571 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:31:12,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:31:12,583 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:31:12,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-12 22:31:12,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:31:12,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:31:12,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:31:12,873 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:31:12,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:31:13,167 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:31:13,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508263368] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:31:13,167 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:31:13,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 14 [2021-11-12 22:31:13,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092319933] [2021-11-12 22:31:13,168 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:31:13,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-12 22:31:13,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:31:13,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-12 22:31:13,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-11-12 22:31:13,170 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 2 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-12 22:31:13,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:31:13,621 INFO L93 Difference]: Finished difference Result 68 states and 79 transitions. [2021-11-12 22:31:13,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-12 22:31:13,624 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 2 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 28 [2021-11-12 22:31:13,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:31:13,625 INFO L225 Difference]: With dead ends: 68 [2021-11-12 22:31:13,625 INFO L226 Difference]: Without dead ends: 42 [2021-11-12 22:31:13,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=122, Invalid=184, Unknown=0, NotChecked=0, Total=306 [2021-11-12 22:31:13,627 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 16 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 125.31ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.00ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 148.93ms IncrementalHoareTripleChecker+Time [2021-11-12 22:31:13,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 287 Invalid, 57 Unknown, 0 Unchecked, 6.00ms Time], IncrementalHoareTripleChecker [12 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 148.93ms Time] [2021-11-12 22:31:13,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-12 22:31:13,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-11-12 22:31:13,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-12 22:31:13,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2021-11-12 22:31:13,635 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 28 [2021-11-12 22:31:13,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:31:13,636 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2021-11-12 22:31:13,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 2 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-12 22:31:13,636 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2021-11-12 22:31:13,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-12 22:31:13,637 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:31:13,637 INFO L514 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:31:13,644 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-11-12 22:31:13,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-12 22:31:14,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 22:31:14,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:31:14,240 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:31:14,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:31:14,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1668252970, now seen corresponding path program 2 times [2021-11-12 22:31:14,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:31:14,242 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [923794063] [2021-11-12 22:31:14,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:31:14,242 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:31:14,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:31:14,243 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:31:14,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 22:31:14,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:31:14,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:31:14,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 22:31:14,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:31:14,676 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:31:14,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:31:15,535 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:31:15,535 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:31:15,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [923794063] [2021-11-12 22:31:15,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [923794063] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:31:15,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2134188816] [2021-11-12 22:31:15,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:31:15,536 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:31:15,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:31:15,537 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:31:15,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-12 22:31:15,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:31:15,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:31:16,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 22:31:16,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:31:16,114 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:31:16,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:31:16,456 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:31:16,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2134188816] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:31:16,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895164745] [2021-11-12 22:31:16,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:31:16,456 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:31:16,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:31:16,457 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:31:16,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-12 22:31:16,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:31:16,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:31:16,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 22:31:16,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:31:16,724 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:31:16,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:31:17,057 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:31:17,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895164745] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:31:17,058 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:31:17,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10, 10] total 18 [2021-11-12 22:31:17,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788934175] [2021-11-12 22:31:17,058 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:31:17,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-12 22:31:17,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:31:17,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-12 22:31:17,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2021-11-12 22:31:17,060 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-12 22:31:18,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:31:18,959 INFO L93 Difference]: Finished difference Result 76 states and 91 transitions. [2021-11-12 22:31:18,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-12 22:31:18,966 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2021-11-12 22:31:18,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:31:18,967 INFO L225 Difference]: With dead ends: 76 [2021-11-12 22:31:18,967 INFO L226 Difference]: Without dead ends: 50 [2021-11-12 22:31:18,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 168 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=242, Invalid=408, Unknown=0, NotChecked=0, Total=650 [2021-11-12 22:31:18,969 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 47 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 315.86ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.38ms SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 375.32ms IncrementalHoareTripleChecker+Time [2021-11-12 22:31:18,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 321 Invalid, 143 Unknown, 0 Unchecked, 3.38ms Time], IncrementalHoareTripleChecker [40 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 375.32ms Time] [2021-11-12 22:31:18,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-12 22:31:18,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-11-12 22:31:18,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 38 states have internal predecessors, (41), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-12 22:31:18,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2021-11-12 22:31:18,978 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 32 [2021-11-12 22:31:18,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:31:18,978 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2021-11-12 22:31:18,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-12 22:31:18,979 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2021-11-12 22:31:18,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-12 22:31:18,980 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:31:18,980 INFO L514 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:31:18,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-11-12 22:31:19,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-12 22:31:19,393 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 22:31:19,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:31:19,587 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:31:19,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:31:19,587 INFO L85 PathProgramCache]: Analyzing trace with hash 988125994, now seen corresponding path program 3 times [2021-11-12 22:31:19,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:31:19,588 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2655846] [2021-11-12 22:31:19,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 22:31:19,588 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:31:19,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:31:19,589 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:31:19,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 22:31:19,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-12 22:31:19,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:31:19,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-12 22:31:19,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:31:20,381 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:31:20,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:31:22,905 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:31:22,905 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:31:22,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2655846] [2021-11-12 22:31:22,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2655846] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:31:22,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [508912411] [2021-11-12 22:31:22,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 22:31:22,906 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:31:22,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:31:22,909 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:31:22,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-12 22:31:23,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-12 22:31:23,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:31:23,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-12 22:31:23,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:31:24,133 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:31:24,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:31:24,769 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:31:24,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [508912411] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:31:24,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054392365] [2021-11-12 22:31:24,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 22:31:24,770 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:31:24,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:31:24,771 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:31:24,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-12 22:32:19,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-12 22:32:19,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:32:19,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-12 22:32:19,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:32:19,856 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:32:19,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:32:20,639 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:32:20,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054392365] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:32:20,639 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:32:20,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18, 18, 18, 18] total 39 [2021-11-12 22:32:20,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506124879] [2021-11-12 22:32:20,640 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:32:20,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-12 22:32:20,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:32:20,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-12 22:32:20,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=392, Invalid=1090, Unknown=0, NotChecked=0, Total=1482 [2021-11-12 22:32:20,643 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 39 states, 39 states have (on average 1.5128205128205128) internal successors, (59), 39 states have internal predecessors, (59), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-12 22:32:28,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:32:28,418 INFO L93 Difference]: Finished difference Result 92 states and 115 transitions. [2021-11-12 22:32:28,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-12 22:32:28,419 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.5128205128205128) internal successors, (59), 39 states have internal predecessors, (59), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 40 [2021-11-12 22:32:28,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:32:28,420 INFO L225 Difference]: With dead ends: 92 [2021-11-12 22:32:28,420 INFO L226 Difference]: Without dead ends: 66 [2021-11-12 22:32:28,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=798, Invalid=2064, Unknown=0, NotChecked=0, Total=2862 [2021-11-12 22:32:28,423 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 149 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 780.66ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.86ms SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 894.53ms IncrementalHoareTripleChecker+Time [2021-11-12 22:32:28,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 569 Invalid, 420 Unknown, 0 Unchecked, 5.86ms Time], IncrementalHoareTripleChecker [148 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 894.53ms Time] [2021-11-12 22:32:28,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-11-12 22:32:28,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-11-12 22:32:28,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 53 states have (on average 1.0943396226415094) internal successors, (58), 54 states have internal predecessors, (58), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-12 22:32:28,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2021-11-12 22:32:28,434 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 40 [2021-11-12 22:32:28,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:32:28,435 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2021-11-12 22:32:28,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.5128205128205128) internal successors, (59), 39 states have internal predecessors, (59), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-12 22:32:28,435 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2021-11-12 22:32:28,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-12 22:32:28,437 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:32:28,437 INFO L514 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:32:28,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 22:32:28,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-12 22:32:28,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-12 22:32:29,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:32:29,051 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:32:29,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:32:29,051 INFO L85 PathProgramCache]: Analyzing trace with hash 511579094, now seen corresponding path program 4 times [2021-11-12 22:32:29,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:32:29,052 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [244966992] [2021-11-12 22:32:29,052 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 22:32:29,052 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:32:29,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:32:29,053 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:32:29,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 22:32:29,274 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 22:32:29,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:32:29,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-12 22:32:29,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:32:29,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-12 22:32:29,404 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-11-12 22:32:29,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 22:32:29,513 INFO L354 Elim1Store]: treesize reduction 58, result has 22.7 percent of original size [2021-11-12 22:32:29,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2021-11-12 22:32:29,674 INFO L354 Elim1Store]: treesize reduction 113, result has 18.7 percent of original size [2021-11-12 22:32:29,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 49 [2021-11-12 22:32:29,948 INFO L354 Elim1Store]: treesize reduction 168, result has 17.2 percent of original size [2021-11-12 22:32:29,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 53 treesize of output 61 [2021-11-12 22:32:30,293 INFO L354 Elim1Store]: treesize reduction 251, result has 14.9 percent of original size [2021-11-12 22:32:30,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 64 treesize of output 75 [2021-11-12 22:32:30,698 INFO L354 Elim1Store]: treesize reduction 346, result has 13.5 percent of original size [2021-11-12 22:32:30,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 75 treesize of output 89 [2021-11-12 22:32:31,335 INFO L354 Elim1Store]: treesize reduction 423, result has 12.8 percent of original size [2021-11-12 22:32:31,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 83 treesize of output 100 [2021-11-12 22:32:32,028 INFO L354 Elim1Store]: treesize reduction 548, result has 11.5 percent of original size [2021-11-12 22:32:32,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 94 treesize of output 114 [2021-11-12 22:32:32,865 INFO L354 Elim1Store]: treesize reduction 653, result has 10.9 percent of original size [2021-11-12 22:32:32,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 45 case distinctions, treesize of input 103 treesize of output 126 [2021-11-12 22:32:33,843 INFO L354 Elim1Store]: treesize reduction 786, result has 10.2 percent of original size [2021-11-12 22:32:33,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 55 case distinctions, treesize of input 113 treesize of output 139 [2021-11-12 22:32:35,006 INFO L354 Elim1Store]: treesize reduction 953, result has 9.3 percent of original size [2021-11-12 22:32:35,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 66 case distinctions, treesize of input 124 treesize of output 153 [2021-11-12 22:32:36,488 INFO L354 Elim1Store]: treesize reduction 1088, result has 9.0 percent of original size [2021-11-12 22:32:36,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 78 case distinctions, treesize of input 133 treesize of output 165 [2021-11-12 22:32:38,252 INFO L354 Elim1Store]: treesize reduction 1283, result has 8.3 percent of original size [2021-11-12 22:32:38,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 91 case distinctions, treesize of input 144 treesize of output 179 [2021-11-12 22:32:40,089 INFO L354 Elim1Store]: treesize reduction 1438, result has 8.0 percent of original size [2021-11-12 22:32:40,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 105 case distinctions, treesize of input 153 treesize of output 191 [2021-11-12 22:32:46,544 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:32:46,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:34:42,870 WARN L227 SmtUtils]: Spent 1.92m on a formula simplification that was a NOOP. DAG size: 142 (called from [L 231] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2021-11-12 22:35:24,325 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 111 treesize of output 109 [2021-11-12 22:35:24,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 655341 treesize of output 655339 [2021-11-12 22:35:36,373 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 105 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:35:36,373 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:35:36,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [244966992] [2021-11-12 22:35:36,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [244966992] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:35:36,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1547425150] [2021-11-12 22:35:36,373 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 22:35:36,373 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:35:36,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:35:36,375 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:35:36,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-12 22:35:36,867 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 22:35:36,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:35:36,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-12 22:35:36,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:35:38,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-12 22:35:38,360 INFO L354 Elim1Store]: treesize reduction 33, result has 23.3 percent of original size [2021-11-12 22:35:38,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-11-12 22:35:38,444 INFO L354 Elim1Store]: treesize reduction 58, result has 22.7 percent of original size [2021-11-12 22:35:38,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2021-11-12 22:35:38,567 INFO L354 Elim1Store]: treesize reduction 113, result has 18.7 percent of original size [2021-11-12 22:35:38,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 49 [2021-11-12 22:35:38,745 INFO L354 Elim1Store]: treesize reduction 168, result has 17.2 percent of original size [2021-11-12 22:35:38,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 53 treesize of output 61 [2021-11-12 22:35:39,008 INFO L354 Elim1Store]: treesize reduction 251, result has 14.9 percent of original size [2021-11-12 22:35:39,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 64 treesize of output 75 [2021-11-12 22:35:39,312 INFO L354 Elim1Store]: treesize reduction 326, result has 14.0 percent of original size [2021-11-12 22:35:39,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 73 treesize of output 87 [2021-11-12 22:35:39,780 INFO L354 Elim1Store]: treesize reduction 455, result has 12.3 percent of original size [2021-11-12 22:35:39,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 86 treesize of output 103 [2021-11-12 22:35:40,423 INFO L354 Elim1Store]: treesize reduction 532, result has 11.8 percent of original size [2021-11-12 22:35:40,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 93 treesize of output 113 [2021-11-12 22:35:41,270 INFO L354 Elim1Store]: treesize reduction 682, result has 10.6 percent of original size [2021-11-12 22:35:41,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 45 case distinctions, treesize of input 105 treesize of output 128 [2021-11-12 22:35:42,207 INFO L354 Elim1Store]: treesize reduction 786, result has 10.2 percent of original size [2021-11-12 22:35:42,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 55 case distinctions, treesize of input 113 treesize of output 139 [2021-11-12 22:35:43,179 INFO L354 Elim1Store]: treesize reduction 931, result has 9.5 percent of original size [2021-11-12 22:35:43,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 66 case distinctions, treesize of input 123 treesize of output 152 [2021-11-12 22:35:44,677 INFO L354 Elim1Store]: treesize reduction 1126, result has 8.8 percent of original size [2021-11-12 22:35:44,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 78 case distinctions, treesize of input 135 treesize of output 167 [2021-11-12 22:35:46,578 INFO L354 Elim1Store]: treesize reduction 1283, result has 8.3 percent of original size [2021-11-12 22:35:46,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 91 case distinctions, treesize of input 144 treesize of output 179 [2021-11-12 22:35:48,349 INFO L354 Elim1Store]: treesize reduction 1438, result has 8.0 percent of original size [2021-11-12 22:35:48,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 105 case distinctions, treesize of input 153 treesize of output 191 [2021-11-12 22:35:55,147 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:35:55,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:37:53,443 WARN L227 SmtUtils]: Spent 1.97m on a formula simplification that was a NOOP. DAG size: 142 (called from [L 231] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2021-11-12 22:37:53,702 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 80 treesize of output 78 [2021-11-12 22:37:54,014 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 111 treesize of output 109 [2021-11-12 22:37:54,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 651249 treesize of output 651247 [2021-11-12 22:38:03,730 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 105 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:38:03,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1547425150] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:38:03,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090097957] [2021-11-12 22:38:03,731 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 22:38:03,731 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:38:03,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:38:03,732 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:38:03,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-12 22:38:03,878 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 22:38:03,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:38:03,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-12 22:38:03,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:38:03,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-12 22:38:03,961 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-11-12 22:38:03,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 22:38:04,371 INFO L354 Elim1Store]: treesize reduction 58, result has 22.7 percent of original size [2021-11-12 22:38:04,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2021-11-12 22:38:04,857 INFO L354 Elim1Store]: treesize reduction 113, result has 18.7 percent of original size [2021-11-12 22:38:04,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 49 [2021-11-12 22:38:05,503 INFO L354 Elim1Store]: treesize reduction 168, result has 17.2 percent of original size [2021-11-12 22:38:05,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 53 treesize of output 61 [2021-11-12 22:38:06,232 INFO L354 Elim1Store]: treesize reduction 241, result has 15.4 percent of original size [2021-11-12 22:38:06,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 63 treesize of output 74 [2021-11-12 22:38:07,100 INFO L354 Elim1Store]: treesize reduction 326, result has 14.0 percent of original size [2021-11-12 22:38:07,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 73 treesize of output 87 [2021-11-12 22:38:08,133 INFO L354 Elim1Store]: treesize reduction 437, result has 12.4 percent of original size [2021-11-12 22:38:08,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 84 treesize of output 101 [2021-11-12 22:38:09,294 INFO L354 Elim1Store]: treesize reduction 558, result has 11.4 percent of original size [2021-11-12 22:38:09,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 115 [2021-11-12 22:38:10,757 INFO L354 Elim1Store]: treesize reduction 693, result has 10.6 percent of original size [2021-11-12 22:38:10,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 45 case distinctions, treesize of input 106 treesize of output 129 [2021-11-12 22:38:12,417 INFO L354 Elim1Store]: treesize reduction 786, result has 10.2 percent of original size [2021-11-12 22:38:12,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 55 case distinctions, treesize of input 113 treesize of output 139 [2021-11-12 22:38:14,224 INFO L354 Elim1Store]: treesize reduction 953, result has 9.3 percent of original size [2021-11-12 22:38:14,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 66 case distinctions, treesize of input 124 treesize of output 153 [2021-11-12 22:38:16,424 INFO L354 Elim1Store]: treesize reduction 1088, result has 9.0 percent of original size [2021-11-12 22:38:16,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 78 case distinctions, treesize of input 133 treesize of output 165 [2021-11-12 22:38:19,150 INFO L354 Elim1Store]: treesize reduction 1283, result has 8.3 percent of original size [2021-11-12 22:38:19,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 91 case distinctions, treesize of input 144 treesize of output 179 [2021-11-12 22:38:21,904 INFO L354 Elim1Store]: treesize reduction 1482, result has 7.8 percent of original size [2021-11-12 22:38:21,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 105 case distinctions, treesize of input 155 treesize of output 193 [2021-11-12 22:38:26,813 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:38:26,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:42:50,400 WARN L227 SmtUtils]: Spent 4.39m on a formula simplification. DAG size of input: 156 DAG size of output: 149 (called from [L 231] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2021-11-12 22:42:59,785 WARN L227 SmtUtils]: Spent 8.06s on a formula simplification. DAG size of input: 68 DAG size of output: 67 (called from [L 231] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2021-11-12 22:43:05,021 WARN L227 SmtUtils]: Spent 5.24s on a formula simplification that was a NOOP. DAG size: 67 (called from [L 268] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2021-11-12 22:43:05,032 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 101 treesize of output 99 [2021-11-12 22:44:50,624 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 111 treesize of output 109 [2021-11-12 22:44:50,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 655337 treesize of output 655335 [2021-11-12 22:44:58,270 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 15 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:44:58,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090097957] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:44:58,271 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:44:58,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 26, 22, 27, 22] total 82 [2021-11-12 22:44:58,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678111023] [2021-11-12 22:44:58,271 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:44:58,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2021-11-12 22:44:58,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:44:58,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-11-12 22:44:58,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1514, Invalid=5085, Unknown=43, NotChecked=0, Total=6642 [2021-11-12 22:44:58,276 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand has 82 states, 80 states have (on average 1.2375) internal successors, (99), 79 states have internal predecessors, (99), 7 states have call successors, (10), 5 states have call predecessors, (10), 8 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-12 22:45:12,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:45:12,550 INFO L93 Difference]: Finished difference Result 96 states and 107 transitions. [2021-11-12 22:45:12,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-12 22:45:12,553 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 80 states have (on average 1.2375) internal successors, (99), 79 states have internal predecessors, (99), 7 states have call successors, (10), 5 states have call predecessors, (10), 8 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) Word has length 41 [2021-11-12 22:45:12,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:45:12,556 INFO L225 Difference]: With dead ends: 96 [2021-11-12 22:45:12,556 INFO L226 Difference]: Without dead ends: 75 [2021-11-12 22:45:12,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 153 SyntacticMatches, 8 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2117 ImplicationChecksByTransitivity, 174.4s TimeCoverageRelationStatistics Valid=1564, Invalid=5533, Unknown=43, NotChecked=0, Total=7140 [2021-11-12 22:45:12,560 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 37 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 704 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11123.08ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 624 SdHoareTripleChecker+Invalid, 821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.97ms SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 11893.90ms IncrementalHoareTripleChecker+Time [2021-11-12 22:45:12,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 624 Invalid, 821 Unknown, 0 Unchecked, 9.97ms Time], IncrementalHoareTripleChecker [49 Valid, 704 Invalid, 0 Unknown, 68 Unchecked, 11893.90ms Time] [2021-11-12 22:45:12,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-11-12 22:45:12,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2021-11-12 22:45:12,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 59 states have (on average 1.1355932203389831) internal successors, (67), 60 states have internal predecessors, (67), 7 states have call successors, (7), 6 states have call predecessors, (7), 6 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2021-11-12 22:45:12,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 81 transitions. [2021-11-12 22:45:12,577 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 81 transitions. Word has length 41 [2021-11-12 22:45:12,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:45:12,578 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 81 transitions. [2021-11-12 22:45:12,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 80 states have (on average 1.2375) internal successors, (99), 79 states have internal predecessors, (99), 7 states have call successors, (10), 5 states have call predecessors, (10), 8 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-12 22:45:12,579 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 81 transitions. [2021-11-12 22:45:12,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-12 22:45:12,580 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:45:12,580 INFO L514 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:45:12,601 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-11-12 22:45:12,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-12 22:45:13,000 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (14)] Ended with exit code 0 [2021-11-12 22:45:13,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:45:13,200 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:45:13,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:45:13,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1056483105, now seen corresponding path program 1 times [2021-11-12 22:45:13,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:45:13,202 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [274814233] [2021-11-12 22:45:13,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:45:13,202 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:45:13,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:45:13,204 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:45:13,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de10551-6736-4030-99cc-ee2910fa856e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 22:45:13,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:45:13,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:45:13,375 INFO L286 TraceCheckSpWp]: Computing forward predicates...