./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_eq_harness.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_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/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_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_eq_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/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_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/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 376fa3967c5a16dbeae94f1517cf176a2f53d2660c6b5c3d2eeb4fd9f827337c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:41:06,991 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:41:06,994 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:41:07,048 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:41:07,049 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:41:07,053 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:41:07,055 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:41:07,059 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:41:07,061 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:41:07,067 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:41:07,068 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:41:07,070 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:41:07,070 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:41:07,073 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:41:07,075 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:41:07,080 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:41:07,081 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:41:07,083 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:41:07,089 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:41:07,096 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:41:07,098 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:41:07,099 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:41:07,103 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:41:07,104 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:41:07,113 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:41:07,113 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:41:07,114 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:41:07,116 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:41:07,117 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:41:07,118 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:41:07,119 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:41:07,120 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:41:07,122 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:41:07,123 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:41:07,125 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:41:07,125 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:41:07,126 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:41:07,126 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:41:07,126 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:41:07,127 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:41:07,128 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:41:07,129 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-12 23:41:07,172 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:41:07,172 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:41:07,174 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:41:07,174 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:41:07,174 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:41:07,175 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:41:07,175 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:41:07,175 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:41:07,175 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:41:07,176 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:41:07,177 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:41:07,177 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:41:07,177 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:41:07,178 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:41:07,178 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:41:07,178 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:41:07,179 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:41:07,179 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:41:07,179 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:41:07,180 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:41:07,180 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:41:07,180 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:41:07,180 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:41:07,180 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:41:07,181 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:41:07,181 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:41:07,181 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:41:07,181 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:41:07,182 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:41:07,183 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:41:07,184 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:41:07,184 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:41:07,184 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:41:07,184 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:41:07,185 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:41:07,185 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:41:07,185 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:41:07,185 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_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 376fa3967c5a16dbeae94f1517cf176a2f53d2660c6b5c3d2eeb4fd9f827337c [2021-11-12 23:41:07,499 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:41:07,528 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:41:07,531 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:41:07,532 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:41:07,533 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:41:07,535 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_eq_harness.i [2021-11-12 23:41:07,612 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/data/9994dc696/4d3aa2f8fba54fccaa6c7fa8ed1d9ddf/FLAG260f2baeb [2021-11-12 23:41:08,465 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:41:08,466 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/sv-benchmarks/c/aws-c-common/aws_byte_cursor_eq_harness.i [2021-11-12 23:41:08,518 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/data/9994dc696/4d3aa2f8fba54fccaa6c7fa8ed1d9ddf/FLAG260f2baeb [2021-11-12 23:41:08,943 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/data/9994dc696/4d3aa2f8fba54fccaa6c7fa8ed1d9ddf [2021-11-12 23:41:08,946 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:41:08,947 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:41:08,949 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:41:08,950 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:41:08,953 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:41:08,954 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:41:08" (1/1) ... [2021-11-12 23:41:08,955 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a8c9599 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:41:08, skipping insertion in model container [2021-11-12 23:41:08,955 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:41:08" (1/1) ... [2021-11-12 23:41:08,962 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:41:09,102 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:41:09,392 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_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/sv-benchmarks/c/aws-c-common/aws_byte_cursor_eq_harness.i[4492,4505] [2021-11-12 23:41:09,399 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_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/sv-benchmarks/c/aws-c-common/aws_byte_cursor_eq_harness.i[4552,4565] [2021-11-12 23:41:09,422 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-12 23:41:09,428 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-12 23:41:10,618 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:41:10,619 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:41:10,619 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:41:10,620 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:41:10,621 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:41:10,635 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:41:10,635 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:41:10,637 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:41:10,638 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:41:11,094 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-12 23:41:11,096 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-12 23:41:11,097 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-12 23:41:11,098 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-12 23:41:11,099 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-12 23:41:11,101 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-12 23:41:11,102 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-12 23:41:11,103 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-12 23:41:11,103 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-12 23:41:11,104 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-12 23:41:11,276 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-12 23:41:11,366 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:41:11,367 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:41:11,451 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:41:11,512 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 23:41:11,512 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6ea4882 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:41:11, skipping insertion in model container [2021-11-12 23:41:11,513 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:41:11,513 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 23:41:11,515 INFO L158 Benchmark]: Toolchain (without parser) took 2566.41ms. Allocated memory is still 140.5MB. Free memory was 96.4MB in the beginning and 63.8MB in the end (delta: 32.6MB). Peak memory consumption was 31.5MB. Max. memory is 16.1GB. [2021-11-12 23:41:11,515 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 83.9MB. Free memory was 55.0MB in the beginning and 54.9MB in the end (delta: 29.2kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:41:11,516 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2563.65ms. Allocated memory is still 140.5MB. Free memory was 96.0MB in the beginning and 63.8MB in the end (delta: 32.2MB). Peak memory consumption was 31.5MB. Max. memory is 16.1GB. [2021-11-12 23:41:11,518 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 83.9MB. Free memory was 55.0MB in the beginning and 54.9MB in the end (delta: 29.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2563.65ms. Allocated memory is still 140.5MB. Free memory was 96.0MB in the beginning and 63.8MB in the end (delta: 32.2MB). Peak memory consumption was 31.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 6990]: 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_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/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_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_eq_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/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_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/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 376fa3967c5a16dbeae94f1517cf176a2f53d2660c6b5c3d2eeb4fd9f827337c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:41:13,690 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:41:13,692 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:41:13,725 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:41:13,725 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:41:13,727 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:41:13,728 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:41:13,731 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:41:13,733 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:41:13,734 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:41:13,736 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:41:13,737 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:41:13,738 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:41:13,739 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:41:13,740 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:41:13,742 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:41:13,743 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:41:13,744 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:41:13,746 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:41:13,748 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:41:13,750 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:41:13,752 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:41:13,753 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:41:13,754 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:41:13,758 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:41:13,758 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:41:13,759 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:41:13,760 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:41:13,761 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:41:13,762 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:41:13,762 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:41:13,763 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:41:13,764 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:41:13,765 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:41:13,766 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:41:13,767 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:41:13,768 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:41:13,768 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:41:13,768 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:41:13,770 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:41:13,770 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:41:13,771 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-12 23:41:13,800 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:41:13,804 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:41:13,806 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:41:13,807 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:41:13,808 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:41:13,808 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:41:13,808 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:41:13,808 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:41:13,809 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:41:13,809 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:41:13,811 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:41:13,811 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:41:13,811 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:41:13,811 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:41:13,812 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:41:13,812 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:41:13,812 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 23:41:13,812 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 23:41:13,812 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:41:13,813 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:41:13,813 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:41:13,813 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:41:13,813 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 23:41:13,814 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:41:13,814 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:41:13,814 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:41:13,814 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:41:13,814 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:41:13,815 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 23:41:13,815 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 23:41:13,815 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:41:13,815 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:41:13,816 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:41:13,816 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_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 376fa3967c5a16dbeae94f1517cf176a2f53d2660c6b5c3d2eeb4fd9f827337c [2021-11-12 23:41:14,141 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:41:14,161 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:41:14,164 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:41:14,165 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:41:14,166 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:41:14,167 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_eq_harness.i [2021-11-12 23:41:14,239 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/data/3ef51d966/1596d8ca49cf496f9b8eec69d4e920a1/FLAG65e7feee0 [2021-11-12 23:41:15,187 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:41:15,188 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/sv-benchmarks/c/aws-c-common/aws_byte_cursor_eq_harness.i [2021-11-12 23:41:15,247 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/data/3ef51d966/1596d8ca49cf496f9b8eec69d4e920a1/FLAG65e7feee0 [2021-11-12 23:41:15,610 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/data/3ef51d966/1596d8ca49cf496f9b8eec69d4e920a1 [2021-11-12 23:41:15,612 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:41:15,613 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:41:15,615 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:41:15,615 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:41:15,624 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:41:15,625 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:41:15" (1/1) ... [2021-11-12 23:41:15,626 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63a65c5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:41:15, skipping insertion in model container [2021-11-12 23:41:15,626 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:41:15" (1/1) ... [2021-11-12 23:41:15,633 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:41:15,760 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:41:16,116 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_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/sv-benchmarks/c/aws-c-common/aws_byte_cursor_eq_harness.i[4492,4505] [2021-11-12 23:41:16,123 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_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/sv-benchmarks/c/aws-c-common/aws_byte_cursor_eq_harness.i[4552,4565] [2021-11-12 23:41:16,148 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-12 23:41:16,154 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-12 23:41:17,062 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:41:17,063 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:41:17,064 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:41:17,064 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:41:17,065 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:41:17,082 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:41:17,083 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:41:17,085 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:41:17,086 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:41:17,640 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-12 23:41:17,641 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-12 23:41:17,642 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-12 23:41:17,643 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-12 23:41:17,645 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-12 23:41:17,645 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-12 23:41:17,646 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-12 23:41:17,647 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-12 23:41:17,647 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-12 23:41:17,648 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-12 23:41:17,851 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-12 23:41:17,995 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:41:17,996 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:41:18,103 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:41:18,177 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 23:41:18,289 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:41:18,294 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_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/sv-benchmarks/c/aws-c-common/aws_byte_cursor_eq_harness.i[4492,4505] [2021-11-12 23:41:18,295 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_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/sv-benchmarks/c/aws-c-common/aws_byte_cursor_eq_harness.i[4552,4565] [2021-11-12 23:41:18,301 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-12 23:41:18,303 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-12 23:41:18,355 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:41:18,355 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:41:18,356 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:41:18,356 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:41:18,357 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:41:18,370 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:41:18,370 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:41:18,372 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:41:18,372 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:41:18,427 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-12 23:41:18,428 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-12 23:41:18,429 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-12 23:41:18,429 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-12 23:41:18,430 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-12 23:41:18,435 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-12 23:41:18,435 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-12 23:41:18,436 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-12 23:41:18,436 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-12 23:41:18,439 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-12 23:41:18,471 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-12 23:41:18,558 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:41:18,559 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:41:18,588 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:41:18,635 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:41:18,660 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_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/sv-benchmarks/c/aws-c-common/aws_byte_cursor_eq_harness.i[4492,4505] [2021-11-12 23:41:18,661 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_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/sv-benchmarks/c/aws-c-common/aws_byte_cursor_eq_harness.i[4552,4565] [2021-11-12 23:41:18,662 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-12 23:41:18,663 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-12 23:41:18,722 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:41:18,723 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:41:18,723 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:41:18,723 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:41:18,724 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:41:18,729 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:41:18,730 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:41:18,731 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:41:18,732 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:41:18,767 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-12 23:41:18,768 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-12 23:41:18,769 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-12 23:41:18,769 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-12 23:41:18,770 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-12 23:41:18,771 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-12 23:41:18,771 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-12 23:41:18,772 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-12 23:41:18,773 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-12 23:41:18,773 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-12 23:41:18,798 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-12 23:41:18,945 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:41:18,946 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:41:18,975 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:41:19,289 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:41:19,289 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:41:19 WrapperNode [2021-11-12 23:41:19,290 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:41:19,291 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:41:19,291 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:41:19,291 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:41:19,298 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:41:19" (1/1) ... [2021-11-12 23:41:19,428 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:41:19" (1/1) ... [2021-11-12 23:41:19,519 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:41:19,520 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:41:19,520 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:41:19,520 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:41:19,529 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:41:19" (1/1) ... [2021-11-12 23:41:19,529 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:41:19" (1/1) ... [2021-11-12 23:41:19,546 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:41:19" (1/1) ... [2021-11-12 23:41:19,546 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:41:19" (1/1) ... [2021-11-12 23:41:19,620 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:41:19" (1/1) ... [2021-11-12 23:41:19,636 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:41:19" (1/1) ... [2021-11-12 23:41:19,658 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:41:19" (1/1) ... [2021-11-12 23:41:19,678 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:41:19,691 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:41:19,692 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:41:19,692 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:41:19,693 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:41:19" (1/1) ... [2021-11-12 23:41:19,701 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:41:19,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:41:19,728 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:41:19,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:41:19,779 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_is_valid [2021-11-12 23:41:19,780 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_is_valid [2021-11-12 23:41:19,780 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-12 23:41:19,780 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-12 23:41:19,780 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-11-12 23:41:19,780 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-11-12 23:41:19,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 23:41:19,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-12 23:41:19,781 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_is_bounded [2021-11-12 23:41:19,782 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_is_bounded [2021-11-12 23:41:19,783 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-12 23:41:19,783 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-12 23:41:19,783 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-12 23:41:19,783 INFO L130 BoogieDeclarations]: Found specification of procedure save_byte_from_array [2021-11-12 23:41:19,783 INFO L138 BoogieDeclarations]: Found implementation of procedure save_byte_from_array [2021-11-12 23:41:19,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-12 23:41:19,784 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:41:19,784 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:41:19,784 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-12 23:41:19,784 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-12 23:41:19,784 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-12 23:41:19,785 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2021-11-12 23:41:19,785 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2021-11-12 23:41:19,785 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-12 23:41:19,785 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-12 23:41:19,785 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-12 23:41:19,785 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:41:19,786 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-12 23:41:19,786 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_eq [2021-11-12 23:41:19,786 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_eq [2021-11-12 23:41:19,786 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-12 23:41:19,786 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-12 23:41:19,787 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-12 23:41:19,787 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-11-12 23:41:19,787 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-11-12 23:41:19,787 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_byte_cursor_has_allocated_buffer_member [2021-11-12 23:41:19,788 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_byte_cursor_has_allocated_buffer_member [2021-11-12 23:41:33,537 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:41:33,538 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-12 23:41:33,540 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:41:33 BoogieIcfgContainer [2021-11-12 23:41:33,540 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:41:33,542 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:41:33,542 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:41:33,545 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:41:33,545 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:41:15" (1/3) ... [2021-11-12 23:41:33,546 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52f13494 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:41:33, skipping insertion in model container [2021-11-12 23:41:33,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:41:19" (2/3) ... [2021-11-12 23:41:33,546 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52f13494 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:41:33, skipping insertion in model container [2021-11-12 23:41:33,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:41:33" (3/3) ... [2021-11-12 23:41:33,548 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_cursor_eq_harness.i [2021-11-12 23:41:33,553 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:41:33,553 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:41:33,602 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:41:33,608 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 23:41:33,608 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 23:41:33,628 INFO L276 IsEmpty]: Start isEmpty. Operand has 134 states, 81 states have (on average 1.2345679012345678) internal successors, (100), 82 states have internal predecessors, (100), 40 states have call successors, (40), 11 states have call predecessors, (40), 11 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2021-11-12 23:41:33,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-12 23:41:33,640 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:41:33,641 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:41:33,642 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:41:33,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:41:33,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1889081573, now seen corresponding path program 1 times [2021-11-12 23:41:33,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:41:33,668 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [636525997] [2021-11-12 23:41:33,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:41:33,669 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:41:33,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:41:33,673 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:41:33,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 23:41:37,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:41:38,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 1898 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:41:38,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:41:38,804 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-12 23:41:38,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:41:39,349 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-12 23:41:39,349 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:41:39,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [636525997] [2021-11-12 23:41:39,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [636525997] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:41:39,350 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:41:39,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 5 [2021-11-12 23:41:39,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032424088] [2021-11-12 23:41:39,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:41:39,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:41:39,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:41:39,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:41:39,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:41:39,386 INFO L87 Difference]: Start difference. First operand has 134 states, 81 states have (on average 1.2345679012345678) internal successors, (100), 82 states have internal predecessors, (100), 40 states have call successors, (40), 11 states have call predecessors, (40), 11 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-11-12 23:41:40,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:41:40,105 INFO L93 Difference]: Finished difference Result 267 states and 391 transitions. [2021-11-12 23:41:40,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:41:40,108 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 102 [2021-11-12 23:41:40,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:41:40,120 INFO L225 Difference]: With dead ends: 267 [2021-11-12 23:41:40,120 INFO L226 Difference]: Without dead ends: 131 [2021-11-12 23:41:40,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:41:40,129 INFO L933 BasicCegarLoop]: 161 mSDtfsCounter, 49 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 556.20ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.49ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 645.30ms IncrementalHoareTripleChecker+Time [2021-11-12 23:41:40,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 558 Invalid, 71 Unknown, 0 Unchecked, 9.49ms Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 645.30ms Time] [2021-11-12 23:41:40,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-11-12 23:41:40,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2021-11-12 23:41:40,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 78 states have (on average 1.205128205128205) internal successors, (94), 80 states have internal predecessors, (94), 40 states have call successors, (40), 11 states have call predecessors, (40), 12 states have return successors, (45), 39 states have call predecessors, (45), 39 states have call successors, (45) [2021-11-12 23:41:40,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 179 transitions. [2021-11-12 23:41:40,186 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 179 transitions. Word has length 102 [2021-11-12 23:41:40,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:41:40,187 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 179 transitions. [2021-11-12 23:41:40,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-11-12 23:41:40,187 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 179 transitions. [2021-11-12 23:41:40,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-12 23:41:40,191 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:41:40,192 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:41:40,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 23:41:40,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:41:40,415 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:41:40,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:41:40,416 INFO L85 PathProgramCache]: Analyzing trace with hash 892843210, now seen corresponding path program 1 times [2021-11-12 23:41:40,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:41:40,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [792249116] [2021-11-12 23:41:40,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:41:40,426 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:41:40,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:41:40,427 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:41:40,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 23:41:44,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:41:45,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 1902 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:41:45,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:41:45,657 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-12 23:41:45,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:41:46,236 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-12 23:41:46,236 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:41:46,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [792249116] [2021-11-12 23:41:46,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [792249116] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:41:46,237 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:41:46,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2021-11-12 23:41:46,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337999448] [2021-11-12 23:41:46,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:41:46,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:41:46,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:41:46,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:41:46,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:41:46,240 INFO L87 Difference]: Start difference. First operand 131 states and 179 transitions. Second operand has 6 states, 5 states have (on average 9.6) internal successors, (48), 6 states have internal predecessors, (48), 4 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-12 23:41:46,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:41:46,994 INFO L93 Difference]: Finished difference Result 212 states and 290 transitions. [2021-11-12 23:41:46,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:41:46,995 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.6) internal successors, (48), 6 states have internal predecessors, (48), 4 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 4 states have call successors, (17) Word has length 104 [2021-11-12 23:41:46,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:41:46,999 INFO L225 Difference]: With dead ends: 212 [2021-11-12 23:41:46,999 INFO L226 Difference]: Without dead ends: 131 [2021-11-12 23:41:47,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:41:47,001 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 67 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 607.10ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 662 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.17ms SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 700.97ms IncrementalHoareTripleChecker+Time [2021-11-12 23:41:47,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 662 Invalid, 113 Unknown, 0 Unchecked, 7.17ms Time], IncrementalHoareTripleChecker [45 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 700.97ms Time] [2021-11-12 23:41:47,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-11-12 23:41:47,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2021-11-12 23:41:47,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 78 states have (on average 1.205128205128205) internal successors, (94), 80 states have internal predecessors, (94), 40 states have call successors, (40), 11 states have call predecessors, (40), 12 states have return successors, (43), 39 states have call predecessors, (43), 39 states have call successors, (43) [2021-11-12 23:41:47,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 177 transitions. [2021-11-12 23:41:47,023 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 177 transitions. Word has length 104 [2021-11-12 23:41:47,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:41:47,024 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 177 transitions. [2021-11-12 23:41:47,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.6) internal successors, (48), 6 states have internal predecessors, (48), 4 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-12 23:41:47,024 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 177 transitions. [2021-11-12 23:41:47,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-12 23:41:47,027 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:41:47,027 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:41:47,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 23:41:47,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:41:47,251 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:41:47,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:41:47,252 INFO L85 PathProgramCache]: Analyzing trace with hash 571694548, now seen corresponding path program 2 times [2021-11-12 23:41:47,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:41:47,260 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2143888608] [2021-11-12 23:41:47,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:41:47,260 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:41:47,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:41:47,261 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:41:47,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 23:41:50,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-12 23:41:50,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:41:51,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 1701 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:41:51,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:41:51,439 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-12 23:41:51,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:41:51,977 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-12 23:41:51,978 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:41:51,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2143888608] [2021-11-12 23:41:51,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2143888608] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:41:51,978 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:41:51,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 12 [2021-11-12 23:41:51,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461373721] [2021-11-12 23:41:51,979 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:41:51,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:41:51,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:41:51,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:41:51,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:41:51,985 INFO L87 Difference]: Start difference. First operand 131 states and 177 transitions. Second operand has 12 states, 10 states have (on average 4.6) internal successors, (46), 8 states have internal predecessors, (46), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 1 states have call successors, (18) [2021-11-12 23:41:52,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:41:52,302 INFO L93 Difference]: Finished difference Result 143 states and 196 transitions. [2021-11-12 23:41:52,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:41:52,303 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 4.6) internal successors, (46), 8 states have internal predecessors, (46), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 1 states have call successors, (18) Word has length 108 [2021-11-12 23:41:52,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:41:52,306 INFO L225 Difference]: With dead ends: 143 [2021-11-12 23:41:52,307 INFO L226 Difference]: Without dead ends: 141 [2021-11-12 23:41:52,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:41:52,309 INFO L933 BasicCegarLoop]: 173 mSDtfsCounter, 19 mSDsluCounter, 1343 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 180.21ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 1516 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.32ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 218.61ms IncrementalHoareTripleChecker+Time [2021-11-12 23:41:52,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 1516 Invalid, 72 Unknown, 0 Unchecked, 9.32ms Time], IncrementalHoareTripleChecker [4 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 218.61ms Time] [2021-11-12 23:41:52,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-11-12 23:41:52,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2021-11-12 23:41:52,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 84 states have (on average 1.1904761904761905) internal successors, (100), 87 states have internal predecessors, (100), 41 states have call successors, (41), 12 states have call predecessors, (41), 14 states have return successors, (52), 40 states have call predecessors, (52), 40 states have call successors, (52) [2021-11-12 23:41:52,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 193 transitions. [2021-11-12 23:41:52,337 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 193 transitions. Word has length 108 [2021-11-12 23:41:52,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:41:52,338 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 193 transitions. [2021-11-12 23:41:52,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 4.6) internal successors, (46), 8 states have internal predecessors, (46), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 1 states have call successors, (18) [2021-11-12 23:41:52,339 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 193 transitions. [2021-11-12 23:41:52,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-12 23:41:52,342 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:41:52,342 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:41:52,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 23:41:52,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:41:52,567 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:41:52,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:41:52,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1101472484, now seen corresponding path program 1 times [2021-11-12 23:41:52,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:41:52,572 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [442835095] [2021-11-12 23:41:52,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:41:52,573 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:41:52,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:41:52,573 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:41:52,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 23:41:56,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:41:57,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 1919 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:41:57,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:41:57,625 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-12 23:41:57,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:41:58,197 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-12 23:41:58,198 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:41:58,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [442835095] [2021-11-12 23:41:58,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [442835095] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:41:58,198 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:41:58,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2021-11-12 23:41:58,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710872834] [2021-11-12 23:41:58,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:41:58,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:41:58,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:41:58,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:41:58,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:41:58,201 INFO L87 Difference]: Start difference. First operand 140 states and 193 transitions. Second operand has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 4 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-12 23:41:58,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:41:58,927 INFO L93 Difference]: Finished difference Result 245 states and 337 transitions. [2021-11-12 23:41:58,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:41:58,928 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 4 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 112 [2021-11-12 23:41:58,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:41:58,932 INFO L225 Difference]: With dead ends: 245 [2021-11-12 23:41:58,932 INFO L226 Difference]: Without dead ends: 137 [2021-11-12 23:41:58,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:41:58,934 INFO L933 BasicCegarLoop]: 161 mSDtfsCounter, 66 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 605.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 678 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.33ms SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 680.84ms IncrementalHoareTripleChecker+Time [2021-11-12 23:41:58,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 678 Invalid, 91 Unknown, 0 Unchecked, 4.33ms Time], IncrementalHoareTripleChecker [39 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 680.84ms Time] [2021-11-12 23:41:58,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-11-12 23:41:58,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2021-11-12 23:41:58,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 82 states have (on average 1.1829268292682926) internal successors, (97), 84 states have internal predecessors, (97), 41 states have call successors, (41), 12 states have call predecessors, (41), 13 states have return successors, (48), 40 states have call predecessors, (48), 40 states have call successors, (48) [2021-11-12 23:41:58,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 186 transitions. [2021-11-12 23:41:58,958 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 186 transitions. Word has length 112 [2021-11-12 23:41:58,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:41:58,959 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 186 transitions. [2021-11-12 23:41:58,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 4 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-12 23:41:58,960 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 186 transitions. [2021-11-12 23:41:58,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-12 23:41:58,962 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:41:58,962 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:41:59,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 23:41:59,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:41:59,176 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:41:59,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:41:59,176 INFO L85 PathProgramCache]: Analyzing trace with hash 952153793, now seen corresponding path program 1 times [2021-11-12 23:41:59,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:41:59,180 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1334272610] [2021-11-12 23:41:59,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:41:59,180 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:41:59,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:41:59,181 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:41:59,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 23:42:03,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:42:03,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 1923 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-12 23:42:03,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:42:07,427 INFO L354 Elim1Store]: treesize reduction 64, result has 1.5 percent of original size [2021-11-12 23:42:07,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 28 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 197 treesize of output 69 [2021-11-12 23:42:08,165 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 57 proven. 16 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-12 23:42:08,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:42:18,465 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 17 proven. 12 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-11-12 23:42:18,465 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:42:18,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1334272610] [2021-11-12 23:42:18,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1334272610] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:42:18,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1600329816] [2021-11-12 23:42:18,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:42:18,466 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:42:18,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:42:18,479 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:42:18,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-12 23:42:23,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:42:23,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 1923 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-12 23:42:23,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:42:23,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:23,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:23,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:23,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:23,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:23,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:23,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:23,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:23,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:23,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:23,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:23,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:23,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:23,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:42:23,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:23,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:23,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:23,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:23,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:23,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:23,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:23,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:42:23,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:23,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:23,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:23,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:23,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:42:23,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:23,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:23,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:23,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:23,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:23,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:23,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:23,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:23,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:23,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:23,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:23,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:42:23,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:23,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:23,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:23,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:23,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:42:23,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:23,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:23,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:23,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:23,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:23,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:23,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:23,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:23,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:23,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:23,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:42:23,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:23,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:23,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:23,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:23,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:42:23,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:24,024 INFO L354 Elim1Store]: treesize reduction 262, result has 21.3 percent of original size [2021-11-12 23:42:24,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 54 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 545 treesize of output 261 [2021-11-12 23:42:27,426 INFO L354 Elim1Store]: treesize reduction 64, result has 1.5 percent of original size [2021-11-12 23:42:27,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 28 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 197 treesize of output 69 [2021-11-12 23:42:27,845 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 57 proven. 16 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-12 23:42:27,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:42:38,168 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 17 proven. 12 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-11-12 23:42:38,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1600329816] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:42:38,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474931905] [2021-11-12 23:42:38,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:42:38,169 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:42:38,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:42:38,176 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:42:38,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-12 23:42:40,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:42:40,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 1923 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-12 23:42:40,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:42:46,954 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 62 proven. 10 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-12 23:42:46,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:42:52,398 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-12 23:42:52,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474931905] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:42:52,398 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:42:52,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 17, 12, 13, 9] total 37 [2021-11-12 23:42:52,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711589089] [2021-11-12 23:42:52,399 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:42:52,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-12 23:42:52,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:42:52,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-12 23:42:52,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1183, Unknown=1, NotChecked=0, Total=1332 [2021-11-12 23:42:52,404 INFO L87 Difference]: Start difference. First operand 137 states and 186 transitions. Second operand has 37 states, 32 states have (on average 4.4375) internal successors, (142), 36 states have internal predecessors, (142), 19 states have call successors, (62), 4 states have call predecessors, (62), 11 states have return successors, (62), 14 states have call predecessors, (62), 19 states have call successors, (62) [2021-11-12 23:42:54,741 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.33s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:42:56,756 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:42:58,773 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:43:00,793 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:43:02,812 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:43:04,827 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:44:00,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:44:00,030 INFO L93 Difference]: Finished difference Result 535 states and 803 transitions. [2021-11-12 23:44:00,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-12 23:44:00,031 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 32 states have (on average 4.4375) internal successors, (142), 36 states have internal predecessors, (142), 19 states have call successors, (62), 4 states have call predecessors, (62), 11 states have return successors, (62), 14 states have call predecessors, (62), 19 states have call successors, (62) Word has length 114 [2021-11-12 23:44:00,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:44:00,038 INFO L225 Difference]: With dead ends: 535 [2021-11-12 23:44:00,038 INFO L226 Difference]: Without dead ends: 461 [2021-11-12 23:44:00,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 717 GetRequests, 632 SyntacticMatches, 23 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1318 ImplicationChecksByTransitivity, 41.2s TimeCoverageRelationStatistics Valid=440, Invalid=3591, Unknown=1, NotChecked=0, Total=4032 [2021-11-12 23:44:00,042 INFO L933 BasicCegarLoop]: 257 mSDtfsCounter, 491 mSDsluCounter, 2460 mSDsCounter, 0 mSdLazyCounter, 3887 mSolverCounterSat, 513 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 49067.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 2717 SdHoareTripleChecker+Invalid, 5733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 59.45ms SdHoareTripleChecker+Time, 513 IncrementalHoareTripleChecker+Valid, 3887 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 1327 IncrementalHoareTripleChecker+Unchecked, 54188.41ms IncrementalHoareTripleChecker+Time [2021-11-12 23:44:00,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [533 Valid, 2717 Invalid, 5733 Unknown, 0 Unchecked, 59.45ms Time], IncrementalHoareTripleChecker [513 Valid, 3887 Invalid, 6 Unknown, 1327 Unchecked, 54188.41ms Time] [2021-11-12 23:44:00,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-11-12 23:44:00,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 205. [2021-11-12 23:44:00,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 122 states have (on average 1.1639344262295082) internal successors, (142), 129 states have internal predecessors, (142), 60 states have call successors, (60), 17 states have call predecessors, (60), 22 states have return successors, (78), 58 states have call predecessors, (78), 59 states have call successors, (78) [2021-11-12 23:44:00,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 280 transitions. [2021-11-12 23:44:00,115 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 280 transitions. Word has length 114 [2021-11-12 23:44:00,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:44:00,115 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 280 transitions. [2021-11-12 23:44:00,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 32 states have (on average 4.4375) internal successors, (142), 36 states have internal predecessors, (142), 19 states have call successors, (62), 4 states have call predecessors, (62), 11 states have return successors, (62), 14 states have call predecessors, (62), 19 states have call successors, (62) [2021-11-12 23:44:00,116 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 280 transitions. [2021-11-12 23:44:00,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-12 23:44:00,119 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:44:00,119 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:44:00,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 23:44:00,361 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-11-12 23:44:00,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-12 23:44:00,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:44:00,743 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:44:00,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:44:00,744 INFO L85 PathProgramCache]: Analyzing trace with hash 553275721, now seen corresponding path program 1 times [2021-11-12 23:44:00,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:44:00,749 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1557701873] [2021-11-12 23:44:00,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:44:00,749 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:44:00,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:44:00,751 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:44:00,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 23:44:04,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:44:04,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-12 23:44:04,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:44:05,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-12 23:44:05,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-12 23:44:06,054 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 49 treesize of output 45 [2021-11-12 23:44:06,059 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 45 treesize of output 41 [2021-11-12 23:44:06,064 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 41 treesize of output 33 [2021-11-12 23:44:06,070 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 30 treesize of output 22 [2021-11-12 23:44:06,325 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 37 treesize of output 25 [2021-11-12 23:44:06,330 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 22 treesize of output 10 [2021-11-12 23:44:06,850 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 76 proven. 8 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-12 23:44:06,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:44:08,614 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 38 treesize of output 32 [2021-11-12 23:44:08,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:44:08,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:44:08,755 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-11-12 23:44:08,755 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:44:08,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1557701873] [2021-11-12 23:44:08,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1557701873] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:44:08,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [218676956] [2021-11-12 23:44:08,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:44:08,756 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:44:08,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:44:08,758 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:44:08,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-12 23:44:10,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:44:10,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:44:10,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:44:11,369 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-12 23:44:11,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:44:12,042 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 13 proven. 18 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-11-12 23:44:12,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [218676956] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:44:12,043 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:44:12,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13, 11, 9] total 24 [2021-11-12 23:44:12,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036248458] [2021-11-12 23:44:12,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:44:12,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-12 23:44:12,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:44:12,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-12 23:44:12,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=498, Unknown=0, NotChecked=0, Total=552 [2021-11-12 23:44:12,046 INFO L87 Difference]: Start difference. First operand 205 states and 280 transitions. Second operand has 9 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 3 states have call successors, (19), 2 states have call predecessors, (19), 4 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-12 23:44:12,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:44:12,799 INFO L93 Difference]: Finished difference Result 331 states and 452 transitions. [2021-11-12 23:44:12,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:44:12,800 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 3 states have call successors, (19), 2 states have call predecessors, (19), 4 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 125 [2021-11-12 23:44:12,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:44:12,804 INFO L225 Difference]: With dead ends: 331 [2021-11-12 23:44:12,804 INFO L226 Difference]: Without dead ends: 210 [2021-11-12 23:44:12,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 469 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=69, Invalid=633, Unknown=0, NotChecked=0, Total=702 [2021-11-12 23:44:12,807 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 12 mSDsluCounter, 1114 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 423.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1281 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.93ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 458.62ms IncrementalHoareTripleChecker+Time [2021-11-12 23:44:12,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 1281 Invalid, 156 Unknown, 0 Unchecked, 4.93ms Time], IncrementalHoareTripleChecker [2 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 458.62ms Time] [2021-11-12 23:44:12,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-11-12 23:44:12,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 210. [2021-11-12 23:44:12,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 126 states have (on average 1.1587301587301588) internal successors, (146), 134 states have internal predecessors, (146), 60 states have call successors, (60), 17 states have call predecessors, (60), 23 states have return successors, (86), 58 states have call predecessors, (86), 59 states have call successors, (86) [2021-11-12 23:44:12,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 292 transitions. [2021-11-12 23:44:12,849 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 292 transitions. Word has length 125 [2021-11-12 23:44:12,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:44:12,849 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 292 transitions. [2021-11-12 23:44:12,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 3 states have call successors, (19), 2 states have call predecessors, (19), 4 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-12 23:44:12,850 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 292 transitions. [2021-11-12 23:44:12,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-12 23:44:12,853 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:44:12,854 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:44:12,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 23:44:13,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-12 23:44:13,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:44:13,279 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:44:13,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:44:13,280 INFO L85 PathProgramCache]: Analyzing trace with hash -339815154, now seen corresponding path program 1 times [2021-11-12 23:44:13,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:44:13,287 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1592922271] [2021-11-12 23:44:13,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:44:13,287 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:44:13,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:44:13,289 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:44:13,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 23:44:17,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:44:17,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 1952 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-12 23:44:17,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:44:18,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-12 23:44:18,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-12 23:44:19,411 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 49 treesize of output 45 [2021-11-12 23:44:19,418 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 45 treesize of output 41 [2021-11-12 23:44:19,426 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 41 treesize of output 33 [2021-11-12 23:44:19,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-11-12 23:44:19,729 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 37 treesize of output 25 [2021-11-12 23:44:19,734 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 22 treesize of output 10 [2021-11-12 23:44:20,278 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 76 proven. 8 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-12 23:44:20,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:44:22,089 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 38 treesize of output 32 [2021-11-12 23:44:22,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:44:22,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:44:22,194 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-11-12 23:44:22,194 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:44:22,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1592922271] [2021-11-12 23:44:22,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1592922271] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:44:22,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [370067461] [2021-11-12 23:44:22,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:44:22,194 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:44:22,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:44:22,195 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:44:22,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-12 23:44:23,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:44:23,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 1952 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:44:23,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:44:25,430 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-11-12 23:44:25,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:44:26,360 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-12 23:44:26,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [370067461] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:44:26,360 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:44:26,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [13, 11, 5] total 21 [2021-11-12 23:44:26,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835481551] [2021-11-12 23:44:26,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:44:26,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:44:26,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:44:26,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:44:26,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-11-12 23:44:26,363 INFO L87 Difference]: Start difference. First operand 210 states and 292 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-12 23:44:28,748 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.38s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:44:30,768 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:44:33,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:44:33,413 INFO L93 Difference]: Finished difference Result 413 states and 582 transitions. [2021-11-12 23:44:33,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:44:33,417 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 127 [2021-11-12 23:44:33,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:44:33,421 INFO L225 Difference]: With dead ends: 413 [2021-11-12 23:44:33,421 INFO L226 Difference]: Without dead ends: 210 [2021-11-12 23:44:33,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 480 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-11-12 23:44:33,425 INFO L933 BasicCegarLoop]: 174 mSDtfsCounter, 17 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5790.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.61ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 6048.33ms IncrementalHoareTripleChecker+Time [2021-11-12 23:44:33,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 597 Invalid, 101 Unknown, 0 Unchecked, 2.61ms Time], IncrementalHoareTripleChecker [2 Valid, 63 Invalid, 2 Unknown, 34 Unchecked, 6048.33ms Time] [2021-11-12 23:44:33,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-11-12 23:44:33,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 210. [2021-11-12 23:44:33,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 126 states have (on average 1.1507936507936507) internal successors, (145), 134 states have internal predecessors, (145), 60 states have call successors, (60), 17 states have call predecessors, (60), 23 states have return successors, (86), 58 states have call predecessors, (86), 59 states have call successors, (86) [2021-11-12 23:44:33,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 291 transitions. [2021-11-12 23:44:33,466 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 291 transitions. Word has length 127 [2021-11-12 23:44:33,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:44:33,467 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 291 transitions. [2021-11-12 23:44:33,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-12 23:44:33,468 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 291 transitions. [2021-11-12 23:44:33,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-12 23:44:33,471 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:44:33,471 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:44:33,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 23:44:33,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-11-12 23:44:33,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:44:33,888 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:44:33,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:44:33,888 INFO L85 PathProgramCache]: Analyzing trace with hash 220884624, now seen corresponding path program 1 times [2021-11-12 23:44:33,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:44:33,894 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1053845357] [2021-11-12 23:44:33,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:44:33,894 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:44:33,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:44:33,895 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:44:33,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 23:44:38,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:44:38,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 1955 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-12 23:44:38,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:44:38,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-12 23:44:38,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-12 23:44:39,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 45 [2021-11-12 23:44:39,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 41 [2021-11-12 23:44:39,439 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 41 treesize of output 33 [2021-11-12 23:44:39,445 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 30 treesize of output 22 [2021-11-12 23:44:39,712 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 37 treesize of output 25 [2021-11-12 23:44:39,717 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 22 treesize of output 10 [2021-11-12 23:44:40,265 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 76 proven. 8 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-12 23:44:40,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:44:42,063 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 38 treesize of output 32 [2021-11-12 23:44:42,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:44:42,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:44:42,163 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-11-12 23:44:42,163 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:44:42,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1053845357] [2021-11-12 23:44:42,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1053845357] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:44:42,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1768489516] [2021-11-12 23:44:42,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:44:42,164 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:44:42,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:44:42,165 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:44:42,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-12 23:44:51,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:44:51,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 1955 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-12 23:44:51,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:44:51,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-12 23:44:51,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-12 23:44:52,158 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 49 treesize of output 45 [2021-11-12 23:44:52,164 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 45 treesize of output 41 [2021-11-12 23:44:52,169 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 41 treesize of output 33 [2021-11-12 23:44:52,179 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 30 treesize of output 22 [2021-11-12 23:44:52,303 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 37 treesize of output 25 [2021-11-12 23:44:52,308 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 22 treesize of output 10 [2021-11-12 23:44:52,632 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 76 proven. 8 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-12 23:44:52,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:44:54,305 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 38 treesize of output 32 [2021-11-12 23:44:54,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:44:54,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:44:54,437 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-11-12 23:44:54,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1768489516] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:44:54,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690062238] [2021-11-12 23:44:54,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:44:54,437 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:44:54,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:44:54,443 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:44:54,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-12 23:44:56,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:44:56,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 1955 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-12 23:44:56,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:44:56,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-12 23:44:56,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-12 23:44:57,292 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 49 treesize of output 45 [2021-11-12 23:44:57,299 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 45 treesize of output 41 [2021-11-12 23:44:57,306 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 41 treesize of output 33 [2021-11-12 23:44:57,314 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 30 treesize of output 22 [2021-11-12 23:44:57,483 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 37 treesize of output 25 [2021-11-12 23:44:57,491 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 22 treesize of output 10 [2021-11-12 23:44:57,836 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 76 proven. 8 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-12 23:44:57,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:45:01,452 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 38 treesize of output 32 [2021-11-12 23:45:01,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:45:01,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:45:01,552 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-11-12 23:45:01,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690062238] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:45:01,552 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:45:01,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13, 11, 13, 11] total 16 [2021-11-12 23:45:01,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980412010] [2021-11-12 23:45:01,553 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:45:01,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-12 23:45:01,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:45:01,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-12 23:45:01,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:45:01,555 INFO L87 Difference]: Start difference. First operand 210 states and 291 transitions. Second operand has 16 states, 15 states have (on average 6.0) internal successors, (90), 16 states have internal predecessors, (90), 9 states have call successors, (34), 5 states have call predecessors, (34), 7 states have return successors, (33), 8 states have call predecessors, (33), 9 states have call successors, (33) [2021-11-12 23:45:03,798 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.24s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:45:05,817 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:45:07,830 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:45:09,840 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:45:15,999 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:45:21,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:45:21,667 INFO L93 Difference]: Finished difference Result 628 states and 974 transitions. [2021-11-12 23:45:21,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-12 23:45:21,668 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 6.0) internal successors, (90), 16 states have internal predecessors, (90), 9 states have call successors, (34), 5 states have call predecessors, (34), 7 states have return successors, (33), 8 states have call predecessors, (33), 9 states have call successors, (33) Word has length 127 [2021-11-12 23:45:21,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:45:21,675 INFO L225 Difference]: With dead ends: 628 [2021-11-12 23:45:21,675 INFO L226 Difference]: Without dead ends: 480 [2021-11-12 23:45:21,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 767 GetRequests, 724 SyntacticMatches, 19 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-11-12 23:45:21,678 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 192 mSDsluCounter, 897 mSDsCounter, 0 mSdLazyCounter, 1585 mSolverCounterSat, 189 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18164.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 1069 SdHoareTripleChecker+Invalid, 2323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 23.81ms SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 1585 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 544 IncrementalHoareTripleChecker+Unchecked, 19063.44ms IncrementalHoareTripleChecker+Time [2021-11-12 23:45:21,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 1069 Invalid, 2323 Unknown, 0 Unchecked, 23.81ms Time], IncrementalHoareTripleChecker [189 Valid, 1585 Invalid, 5 Unknown, 544 Unchecked, 19063.44ms Time] [2021-11-12 23:45:21,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2021-11-12 23:45:21,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 252. [2021-11-12 23:45:21,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 153 states have (on average 1.1503267973856208) internal successors, (176), 162 states have internal predecessors, (176), 71 states have call successors, (71), 20 states have call predecessors, (71), 27 states have return successors, (105), 69 states have call predecessors, (105), 70 states have call successors, (105) [2021-11-12 23:45:21,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 352 transitions. [2021-11-12 23:45:21,736 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 352 transitions. Word has length 127 [2021-11-12 23:45:21,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:45:21,736 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 352 transitions. [2021-11-12 23:45:21,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 6.0) internal successors, (90), 16 states have internal predecessors, (90), 9 states have call successors, (34), 5 states have call predecessors, (34), 7 states have return successors, (33), 8 states have call predecessors, (33), 9 states have call successors, (33) [2021-11-12 23:45:21,737 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 352 transitions. [2021-11-12 23:45:21,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-12 23:45:21,740 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:45:21,740 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:45:21,814 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-12 23:45:21,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-12 23:45:22,204 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-11-12 23:45:22,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:45:22,356 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:45:22,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:45:22,356 INFO L85 PathProgramCache]: Analyzing trace with hash 2106135600, now seen corresponding path program 2 times [2021-11-12 23:45:22,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:45:22,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [333907927] [2021-11-12 23:45:22,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:45:22,361 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:45:22,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:45:22,363 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:45:22,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce9748df-fa7f-43da-a0f8-9a8df41a3f74/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process