./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_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_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/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_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/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_2e3bb812-5ec0-43a3-9b42-10a077fa5178/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 efe93c285b9cfe4b236eb7cc9957c6e5b1b94bff3322775b8e8d61a9769c319e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:59:08,163 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:59:08,166 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:59:08,243 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:59:08,244 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:59:08,249 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:59:08,250 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:59:08,254 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:59:08,257 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:59:08,263 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:59:08,264 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:59:08,266 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:59:08,266 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:59:08,272 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:59:08,274 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:59:08,279 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:59:08,280 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:59:08,281 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:59:08,284 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:59:08,292 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:59:08,293 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:59:08,295 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:59:08,298 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:59:08,299 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:59:08,308 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:59:08,308 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:59:08,308 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:59:08,310 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:59:08,311 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:59:08,313 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:59:08,313 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:59:08,314 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:59:08,316 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:59:08,317 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:59:08,319 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:59:08,319 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:59:08,319 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:59:08,320 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:59:08,320 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:59:08,321 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:59:08,321 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:59:08,322 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-12 22:59:08,367 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:59:08,367 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:59:08,368 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:59:08,369 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:59:08,369 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:59:08,369 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:59:08,369 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:59:08,369 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 22:59:08,370 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:59:08,370 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:59:08,371 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 22:59:08,371 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 22:59:08,371 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:59:08,371 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 22:59:08,372 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 22:59:08,372 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 22:59:08,373 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:59:08,373 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 22:59:08,373 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:59:08,373 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:59:08,373 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:59:08,373 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:59:08,374 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:59:08,374 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:59:08,374 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:59:08,374 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:59:08,374 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:59:08,375 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:59:08,375 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:59:08,376 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:59:08,377 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:59:08,377 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:59:08,377 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 22:59:08,377 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 22:59:08,378 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:59:08,378 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:59:08,378 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:59:08,378 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_2e3bb812-5ec0-43a3-9b42-10a077fa5178/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> efe93c285b9cfe4b236eb7cc9957c6e5b1b94bff3322775b8e8d61a9769c319e [2021-11-12 22:59:08,678 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:59:08,706 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:59:08,709 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:59:08,710 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:59:08,711 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:59:08,713 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_harness.i [2021-11-12 22:59:08,775 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/data/9952ae9c4/3ec4c3b4a0b34164b5ea7d6dd5f8991e/FLAG204ea77a6 [2021-11-12 22:59:09,773 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:59:09,773 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_harness.i [2021-11-12 22:59:09,824 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/data/9952ae9c4/3ec4c3b4a0b34164b5ea7d6dd5f8991e/FLAG204ea77a6 [2021-11-12 22:59:10,181 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/data/9952ae9c4/3ec4c3b4a0b34164b5ea7d6dd5f8991e [2021-11-12 22:59:10,183 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:59:10,184 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:59:10,186 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:59:10,187 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:59:10,190 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:59:10,191 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:59:10" (1/1) ... [2021-11-12 22:59:10,192 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@217fb674 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:59:10, skipping insertion in model container [2021-11-12 22:59:10,192 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:59:10" (1/1) ... [2021-11-12 22:59:10,199 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:59:10,361 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:59:10,761 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_2e3bb812-5ec0-43a3-9b42-10a077fa5178/sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_harness.i[4489,4502] [2021-11-12 22:59:10,772 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_2e3bb812-5ec0-43a3-9b42-10a077fa5178/sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_harness.i[4549,4562] [2021-11-12 22:59:10,809 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-12 22:59:10,819 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-12 22:59:12,073 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:59:12,074 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:59:12,075 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:59:12,077 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:59:12,078 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:59:12,106 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:59:12,111 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:59:12,113 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:59:12,114 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:59:12,543 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-12 22:59:12,544 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-12 22:59:12,545 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-12 22:59:12,546 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-12 22:59:12,548 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-12 22:59:12,549 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-12 22:59:12,550 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-12 22:59:12,550 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-12 22:59:12,551 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-12 22:59:12,552 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-12 22:59:12,761 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-12 22:59:12,869 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:59:12,869 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:59:12,931 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:59:12,985 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-12 22:59:12,985 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7f318a52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:59:12, skipping insertion in model container [2021-11-12 22:59:12,985 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:59:12,986 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 22:59:12,988 INFO L158 Benchmark]: Toolchain (without parser) took 2802.48ms. Allocated memory was 109.1MB in the beginning and 132.1MB in the end (delta: 23.1MB). Free memory was 66.2MB in the beginning and 79.9MB in the end (delta: -13.7MB). Peak memory consumption was 23.9MB. Max. memory is 16.1GB. [2021-11-12 22:59:12,989 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 81.8MB. Free memory is still 38.3MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:59:12,990 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2799.54ms. Allocated memory was 109.1MB in the beginning and 132.1MB in the end (delta: 23.1MB). Free memory was 66.1MB in the beginning and 79.9MB in the end (delta: -13.8MB). Peak memory consumption was 23.9MB. Max. memory is 16.1GB. [2021-11-12 22:59:12,991 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 81.8MB. Free memory is still 38.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2799.54ms. Allocated memory was 109.1MB in the beginning and 132.1MB in the end (delta: 23.1MB). Free memory was 66.1MB in the beginning and 79.9MB in the end (delta: -13.8MB). Peak memory consumption was 23.9MB. 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_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/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_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/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_2e3bb812-5ec0-43a3-9b42-10a077fa5178/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 efe93c285b9cfe4b236eb7cc9957c6e5b1b94bff3322775b8e8d61a9769c319e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:59:15,582 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:59:15,587 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:59:15,656 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:59:15,656 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:59:15,663 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:59:15,666 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:59:15,672 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:59:15,676 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:59:15,685 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:59:15,687 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:59:15,690 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:59:15,691 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:59:15,694 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:59:15,697 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:59:15,702 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:59:15,704 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:59:15,705 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:59:15,715 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:59:15,723 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:59:15,727 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:59:15,728 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:59:15,732 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:59:15,734 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:59:15,742 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:59:15,743 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:59:15,743 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:59:15,745 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:59:15,746 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:59:15,748 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:59:15,748 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:59:15,750 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:59:15,752 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:59:15,753 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:59:15,755 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:59:15,756 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:59:15,757 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:59:15,757 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:59:15,758 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:59:15,760 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:59:15,761 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:59:15,762 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-12 22:59:15,810 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:59:15,810 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:59:15,812 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:59:15,812 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:59:15,812 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:59:15,813 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:59:15,813 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:59:15,813 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:59:15,813 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:59:15,814 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:59:15,816 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:59:15,816 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:59:15,817 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:59:15,817 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:59:15,817 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:59:15,817 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:59:15,818 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 22:59:15,818 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 22:59:15,818 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:59:15,818 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:59:15,819 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:59:15,819 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:59:15,819 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 22:59:15,820 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:59:15,820 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:59:15,820 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:59:15,820 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:59:15,821 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:59:15,821 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 22:59:15,821 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 22:59:15,821 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:59:15,822 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:59:15,822 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:59:15,822 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_2e3bb812-5ec0-43a3-9b42-10a077fa5178/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> efe93c285b9cfe4b236eb7cc9957c6e5b1b94bff3322775b8e8d61a9769c319e [2021-11-12 22:59:16,304 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:59:16,356 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:59:16,360 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:59:16,362 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:59:16,363 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:59:16,364 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_harness.i [2021-11-12 22:59:16,462 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/data/04a8c1def/e639e7714db14705af51f772fdd78ece/FLAG6de910de9 [2021-11-12 22:59:17,699 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:59:17,700 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_harness.i [2021-11-12 22:59:17,778 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/data/04a8c1def/e639e7714db14705af51f772fdd78ece/FLAG6de910de9 [2021-11-12 22:59:18,035 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/data/04a8c1def/e639e7714db14705af51f772fdd78ece [2021-11-12 22:59:18,039 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:59:18,044 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:59:18,046 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:59:18,047 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:59:18,051 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:59:18,052 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:59:18" (1/1) ... [2021-11-12 22:59:18,055 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c6f1b09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:59:18, skipping insertion in model container [2021-11-12 22:59:18,056 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:59:18" (1/1) ... [2021-11-12 22:59:18,066 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:59:18,271 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:59:18,574 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_2e3bb812-5ec0-43a3-9b42-10a077fa5178/sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_harness.i[4489,4502] [2021-11-12 22:59:18,598 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_2e3bb812-5ec0-43a3-9b42-10a077fa5178/sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_harness.i[4549,4562] [2021-11-12 22:59:18,638 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-12 22:59:18,656 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-12 22:59:20,008 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:59:20,010 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:59:20,012 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:59:20,014 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:59:20,016 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:59:20,046 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:59:20,047 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:59:20,051 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:59:20,052 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:59:20,706 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-12 22:59:20,708 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-12 22:59:20,710 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-12 22:59:20,712 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-12 22:59:20,720 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-12 22:59:20,721 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-12 22:59:20,724 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-12 22:59:20,726 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-12 22:59:20,730 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-12 22:59:20,731 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-12 22:59:20,966 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-12 22:59:21,129 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:59:21,154 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:59:21,260 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:59:21,334 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 22:59:21,429 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:59:21,435 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_2e3bb812-5ec0-43a3-9b42-10a077fa5178/sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_harness.i[4489,4502] [2021-11-12 22:59:21,435 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_2e3bb812-5ec0-43a3-9b42-10a077fa5178/sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_harness.i[4549,4562] [2021-11-12 22:59:21,437 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-12 22:59:21,438 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-12 22:59:21,507 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:59:21,507 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:59:21,508 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:59:21,509 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:59:21,510 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:59:21,540 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:59:21,545 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:59:21,547 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:59:21,547 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:59:21,622 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-12 22:59:21,623 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-12 22:59:21,625 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-12 22:59:21,627 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-12 22:59:21,628 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-12 22:59:21,629 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-12 22:59:21,631 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-12 22:59:21,632 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-12 22:59:21,633 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-12 22:59:21,633 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-12 22:59:21,671 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-12 22:59:21,811 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:59:21,811 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:59:21,857 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:59:21,916 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:59:21,949 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_2e3bb812-5ec0-43a3-9b42-10a077fa5178/sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_harness.i[4489,4502] [2021-11-12 22:59:21,949 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_2e3bb812-5ec0-43a3-9b42-10a077fa5178/sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_harness.i[4549,4562] [2021-11-12 22:59:21,951 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-12 22:59:21,953 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-12 22:59:22,053 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:59:22,055 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:59:22,056 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:59:22,057 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:59:22,057 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:59:22,064 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:59:22,068 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:59:22,069 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:59:22,070 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:59:22,111 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-12 22:59:22,112 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-12 22:59:22,113 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-12 22:59:22,114 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-12 22:59:22,115 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-12 22:59:22,115 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-12 22:59:22,116 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-12 22:59:22,117 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-12 22:59:22,117 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-12 22:59:22,118 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-12 22:59:22,154 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-12 22:59:22,267 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:59:22,268 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:59:22,308 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:59:22,771 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:59:22,771 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:59:22 WrapperNode [2021-11-12 22:59:22,772 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:59:22,773 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:59:22,773 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:59:22,774 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:59:22,783 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:59:22" (1/1) ... [2021-11-12 22:59:22,963 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:59:22" (1/1) ... [2021-11-12 22:59:23,132 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:59:23,133 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:59:23,133 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:59:23,133 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:59:23,146 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:59:22" (1/1) ... [2021-11-12 22:59:23,146 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:59:22" (1/1) ... [2021-11-12 22:59:23,175 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:59:22" (1/1) ... [2021-11-12 22:59:23,176 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:59:22" (1/1) ... [2021-11-12 22:59:23,263 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:59:22" (1/1) ... [2021-11-12 22:59:23,267 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:59:22" (1/1) ... [2021-11-12 22:59:23,288 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:59:22" (1/1) ... [2021-11-12 22:59:23,353 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:59:23,363 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:59:23,365 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:59:23,365 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:59:23,366 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:59:22" (1/1) ... [2021-11-12 22:59:23,376 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:59:23,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:59:23,404 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:59:23,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:59:23,460 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2021-11-12 22:59:23,461 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2021-11-12 22:59:23,461 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-12 22:59:23,461 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-12 22:59:23,461 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-11-12 22:59:23,462 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-11-12 22:59:23,462 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 22:59:23,462 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-12 22:59:23,464 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-12 22:59:23,464 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-12 22:59:23,464 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-12 22:59:23,465 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-12 22:59:23,465 INFO L130 BoogieDeclarations]: Found specification of procedure save_byte_from_array [2021-11-12 22:59:23,465 INFO L138 BoogieDeclarations]: Found implementation of procedure save_byte_from_array [2021-11-12 22:59:23,466 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-12 22:59:23,466 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_byte_buf_has_allocated_buffer_member [2021-11-12 22:59:23,466 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_byte_buf_has_allocated_buffer_member [2021-11-12 22:59:23,466 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:59:23,466 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:59:23,467 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-12 22:59:23,467 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-12 22:59:23,467 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-12 22:59:23,467 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2021-11-12 22:59:23,467 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2021-11-12 22:59:23,468 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-12 22:59:23,468 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-12 22:59:23,469 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-12 22:59:23,469 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:59:23,469 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-12 22:59:23,469 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_eq [2021-11-12 22:59:23,470 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_eq [2021-11-12 22:59:23,470 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-12 22:59:23,470 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-12 22:59:23,471 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-12 22:59:23,471 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-11-12 22:59:23,471 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-11-12 22:59:23,471 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-11-12 22:59:23,472 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-11-12 22:59:23,473 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_bounded [2021-11-12 22:59:23,477 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_bounded [2021-11-12 22:59:23,477 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_buf_equivalence [2021-11-12 22:59:23,478 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_buf_equivalence [2021-11-12 22:59:42,627 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:59:42,628 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-12 22:59:42,630 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:59:42 BoogieIcfgContainer [2021-11-12 22:59:42,631 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:59:42,636 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:59:42,636 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:59:42,649 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:59:42,649 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:59:18" (1/3) ... [2021-11-12 22:59:42,650 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c5d76d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:59:42, skipping insertion in model container [2021-11-12 22:59:42,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:59:22" (2/3) ... [2021-11-12 22:59:42,653 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c5d76d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:59:42, skipping insertion in model container [2021-11-12 22:59:42,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:59:42" (3/3) ... [2021-11-12 22:59:42,658 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_eq_harness.i [2021-11-12 22:59:42,669 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:59:42,669 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 22:59:42,759 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:59:42,767 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 22:59:42,768 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 22:59:42,799 INFO L276 IsEmpty]: Start isEmpty. Operand has 153 states, 92 states have (on average 1.2282608695652173) internal successors, (113), 93 states have internal predecessors, (113), 46 states have call successors, (46), 13 states have call predecessors, (46), 13 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2021-11-12 22:59:42,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-12 22:59:42,832 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:59:42,834 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:59:42,835 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:59:42,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:59:42,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1419889978, now seen corresponding path program 1 times [2021-11-12 22:59:42,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:59:42,880 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1227940335] [2021-11-12 22:59:42,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:59:42,881 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:59:42,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:59:42,885 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:59:42,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 22:59:48,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:59:48,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 1969 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-12 22:59:48,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:59:49,105 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-12 22:59:49,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:59:49,602 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-12 22:59:49,603 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:59:49,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1227940335] [2021-11-12 22:59:49,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1227940335] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:59:49,604 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:59:49,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2021-11-12 22:59:49,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419463314] [2021-11-12 22:59:49,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:59:49,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 22:59:49,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:59:49,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 22:59:49,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 22:59:49,652 INFO L87 Difference]: Start difference. First operand has 153 states, 92 states have (on average 1.2282608695652173) internal successors, (113), 93 states have internal predecessors, (113), 46 states have call successors, (46), 13 states have call predecessors, (46), 13 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) Second operand has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-12 22:59:49,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:59:49,710 INFO L93 Difference]: Finished difference Result 302 states and 436 transitions. [2021-11-12 22:59:49,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 22:59:49,713 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 113 [2021-11-12 22:59:49,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:59:49,731 INFO L225 Difference]: With dead ends: 302 [2021-11-12 22:59:49,731 INFO L226 Difference]: Without dead ends: 148 [2021-11-12 22:59:49,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 22:59:49,746 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.99ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-12 22:59:49,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 2.99ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-12 22:59:49,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-11-12 22:59:49,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2021-11-12 22:59:49,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 88 states have (on average 1.2159090909090908) internal successors, (107), 89 states have internal predecessors, (107), 46 states have call successors, (46), 13 states have call predecessors, (46), 13 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2021-11-12 22:59:49,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 198 transitions. [2021-11-12 22:59:49,873 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 198 transitions. Word has length 113 [2021-11-12 22:59:49,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:59:49,876 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 198 transitions. [2021-11-12 22:59:49,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-12 22:59:49,876 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 198 transitions. [2021-11-12 22:59:49,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-12 22:59:49,885 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:59:49,886 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:59:49,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 22:59:50,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:59:50,111 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:59:50,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:59:50,112 INFO L85 PathProgramCache]: Analyzing trace with hash -254215752, now seen corresponding path program 1 times [2021-11-12 22:59:50,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:59:50,128 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [973694942] [2021-11-12 22:59:50,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:59:50,129 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:59:50,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:59:50,130 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:59:50,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 22:59:55,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:59:55,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 1969 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 22:59:55,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:59:56,326 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-12 22:59:56,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:59:57,001 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-12 22:59:57,001 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:59:57,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [973694942] [2021-11-12 22:59:57,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [973694942] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:59:57,002 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:59:57,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 5 [2021-11-12 22:59:57,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862465115] [2021-11-12 22:59:57,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:59:57,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:59:57,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:59:57,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:59:57,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:59:57,005 INFO L87 Difference]: Start difference. First operand 148 states and 198 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 3 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-12 22:59:59,140 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:59:59,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:59:59,708 INFO L93 Difference]: Finished difference Result 333 states and 466 transitions. [2021-11-12 22:59:59,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:59:59,709 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 3 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 113 [2021-11-12 22:59:59,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:59:59,715 INFO L225 Difference]: With dead ends: 333 [2021-11-12 22:59:59,715 INFO L226 Difference]: Without dead ends: 192 [2021-11-12 22:59:59,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 221 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 22:59:59,719 INFO L933 BasicCegarLoop]: 243 mSDtfsCounter, 47 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2501.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 869 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.46ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2630.16ms IncrementalHoareTripleChecker+Time [2021-11-12 22:59:59,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 869 Invalid, 100 Unknown, 0 Unchecked, 13.46ms Time], IncrementalHoareTripleChecker [1 Valid, 98 Invalid, 1 Unknown, 0 Unchecked, 2630.16ms Time] [2021-11-12 22:59:59,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-11-12 22:59:59,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 185. [2021-11-12 22:59:59,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 107 states have (on average 1.205607476635514) internal successors, (129), 110 states have internal predecessors, (129), 63 states have call successors, (63), 13 states have call predecessors, (63), 14 states have return successors, (73), 61 states have call predecessors, (73), 62 states have call successors, (73) [2021-11-12 22:59:59,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 265 transitions. [2021-11-12 22:59:59,756 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 265 transitions. Word has length 113 [2021-11-12 22:59:59,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:59:59,757 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 265 transitions. [2021-11-12 22:59:59,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 3 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-12 22:59:59,758 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 265 transitions. [2021-11-12 22:59:59,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-12 22:59:59,762 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:59:59,763 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:59:59,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 22:59:59,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:59:59,983 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:59:59,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:59:59,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1731779843, now seen corresponding path program 1 times [2021-11-12 22:59:59,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:59:59,988 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1112667770] [2021-11-12 22:59:59,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:59:59,989 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:59:59,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:59:59,990 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:59:59,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 23:00:05,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:00:05,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 1982 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 23:00:05,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:00:05,915 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 18 treesize of output 14 [2021-11-12 23:00:07,579 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-12 23:00:07,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:00:09,412 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 40 treesize of output 34 [2021-11-12 23:00:09,668 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-12 23:00:09,668 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:00:09,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1112667770] [2021-11-12 23:00:09,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1112667770] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:00:09,669 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:00:09,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [11] total 18 [2021-11-12 23:00:09,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021236071] [2021-11-12 23:00:09,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:00:09,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:00:09,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:00:09,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:00:09,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-11-12 23:00:09,672 INFO L87 Difference]: Start difference. First operand 185 states and 265 transitions. Second operand has 13 states, 12 states have (on average 4.5) internal successors, (54), 10 states have internal predecessors, (54), 5 states have call successors, (20), 3 states have call predecessors, (20), 5 states have return successors, (19), 6 states have call predecessors, (19), 5 states have call successors, (19) [2021-11-12 23:00:11,936 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.26s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:00:14,293 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:00:14,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:00:14,632 INFO L93 Difference]: Finished difference Result 383 states and 543 transitions. [2021-11-12 23:00:14,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-12 23:00:14,634 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.5) internal successors, (54), 10 states have internal predecessors, (54), 5 states have call successors, (20), 3 states have call predecessors, (20), 5 states have return successors, (19), 6 states have call predecessors, (19), 5 states have call successors, (19) Word has length 119 [2021-11-12 23:00:14,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:00:14,638 INFO L225 Difference]: With dead ends: 383 [2021-11-12 23:00:14,638 INFO L226 Difference]: Without dead ends: 198 [2021-11-12 23:00:14,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-11-12 23:00:14,641 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 18 mSDsluCounter, 1577 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4669.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 1769 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.45ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 4811.56ms IncrementalHoareTripleChecker+Time [2021-11-12 23:00:14,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 1769 Invalid, 145 Unknown, 0 Unchecked, 13.45ms Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 2 Unknown, 98 Unchecked, 4811.56ms Time] [2021-11-12 23:00:14,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-11-12 23:00:14,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2021-11-12 23:00:14,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 119 states have (on average 1.2100840336134453) internal successors, (144), 122 states have internal predecessors, (144), 63 states have call successors, (63), 14 states have call predecessors, (63), 15 states have return successors, (74), 61 states have call predecessors, (74), 62 states have call successors, (74) [2021-11-12 23:00:14,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 281 transitions. [2021-11-12 23:00:14,675 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 281 transitions. Word has length 119 [2021-11-12 23:00:14,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:00:14,676 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 281 transitions. [2021-11-12 23:00:14,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.5) internal successors, (54), 10 states have internal predecessors, (54), 5 states have call successors, (20), 3 states have call predecessors, (20), 5 states have return successors, (19), 6 states have call predecessors, (19), 5 states have call successors, (19) [2021-11-12 23:00:14,676 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 281 transitions. [2021-11-12 23:00:14,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-12 23:00:14,680 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:00:14,680 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:00:14,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 23:00:14,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:00:14,907 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:00:14,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:00:14,908 INFO L85 PathProgramCache]: Analyzing trace with hash 673941765, now seen corresponding path program 1 times [2021-11-12 23:00:14,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:00:14,912 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [279519429] [2021-11-12 23:00:14,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:00:14,913 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:00:14,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:00:14,914 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:00:14,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 23:00:19,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:00:19,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 1979 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:00:19,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:00:19,682 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-12 23:00:19,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:00:20,058 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-11-12 23:00:20,058 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:00:20,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [279519429] [2021-11-12 23:00:20,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [279519429] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:00:20,059 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:00:20,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2021-11-12 23:00:20,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557378501] [2021-11-12 23:00:20,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:00:20,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:00:20,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:00:20,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:00:20,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:00:20,065 INFO L87 Difference]: Start difference. First operand 198 states and 281 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-12 23:00:20,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:00:20,181 INFO L93 Difference]: Finished difference Result 386 states and 561 transitions. [2021-11-12 23:00:20,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:00:20,182 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 119 [2021-11-12 23:00:20,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:00:20,194 INFO L225 Difference]: With dead ends: 386 [2021-11-12 23:00:20,194 INFO L226 Difference]: Without dead ends: 204 [2021-11-12 23:00:20,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:00:20,199 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 20 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 55.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.95ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 69.07ms IncrementalHoareTripleChecker+Time [2021-11-12 23:00:20,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 586 Invalid, 16 Unknown, 0 Unchecked, 2.95ms Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 69.07ms Time] [2021-11-12 23:00:20,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-11-12 23:00:20,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 192. [2021-11-12 23:00:20,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 114 states have (on average 1.2105263157894737) internal successors, (138), 116 states have internal predecessors, (138), 63 states have call successors, (63), 14 states have call predecessors, (63), 14 states have return successors, (73), 61 states have call predecessors, (73), 62 states have call successors, (73) [2021-11-12 23:00:20,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 274 transitions. [2021-11-12 23:00:20,246 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 274 transitions. Word has length 119 [2021-11-12 23:00:20,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:00:20,246 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 274 transitions. [2021-11-12 23:00:20,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-12 23:00:20,247 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 274 transitions. [2021-11-12 23:00:20,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-12 23:00:20,249 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:00:20,250 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:00:20,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 23:00:20,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:00:20,475 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:00:20,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:00:20,475 INFO L85 PathProgramCache]: Analyzing trace with hash -772634293, now seen corresponding path program 1 times [2021-11-12 23:00:20,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:00:20,480 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1267711572] [2021-11-12 23:00:20,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:00:20,481 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:00:20,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:00:20,482 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:00:20,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 23:00:24,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:00:25,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 1991 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:00:25,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:00:26,004 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-12 23:00:26,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:00:26,728 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-11-12 23:00:26,728 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:00:26,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1267711572] [2021-11-12 23:00:26,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1267711572] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:00:26,729 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:00:26,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2021-11-12 23:00:26,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701904561] [2021-11-12 23:00:26,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:00:26,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:00:26,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:00:26,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:00:26,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:00:26,731 INFO L87 Difference]: Start difference. First operand 192 states and 274 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-12 23:00:28,994 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.26s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:00:31,007 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:00:32,907 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:00:34,930 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 23:00:36,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:00:36,099 INFO L93 Difference]: Finished difference Result 392 states and 581 transitions. [2021-11-12 23:00:36,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:00:36,104 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 123 [2021-11-12 23:00:36,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:00:36,108 INFO L225 Difference]: With dead ends: 392 [2021-11-12 23:00:36,108 INFO L226 Difference]: Without dead ends: 212 [2021-11-12 23:00:36,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 238 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:00:36,111 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 42 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 0 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8834.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 715 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.60ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 9126.63ms IncrementalHoareTripleChecker+Time [2021-11-12 23:00:36,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 715 Invalid, 126 Unknown, 0 Unchecked, 7.60ms Time], IncrementalHoareTripleChecker [0 Valid, 83 Invalid, 3 Unknown, 40 Unchecked, 9126.63ms Time] [2021-11-12 23:00:36,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-11-12 23:00:36,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 201. [2021-11-12 23:00:36,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 123 states have (on average 1.2195121951219512) internal successors, (150), 125 states have internal predecessors, (150), 63 states have call successors, (63), 14 states have call predecessors, (63), 14 states have return successors, (73), 61 states have call predecessors, (73), 62 states have call successors, (73) [2021-11-12 23:00:36,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 286 transitions. [2021-11-12 23:00:36,140 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 286 transitions. Word has length 123 [2021-11-12 23:00:36,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:00:36,141 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 286 transitions. [2021-11-12 23:00:36,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-12 23:00:36,141 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 286 transitions. [2021-11-12 23:00:36,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-12 23:00:36,144 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:00:36,145 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:00:36,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 23:00:36,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:00:36,359 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:00:36,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:00:36,360 INFO L85 PathProgramCache]: Analyzing trace with hash 794123657, now seen corresponding path program 1 times [2021-11-12 23:00:36,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:00:36,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1671522291] [2021-11-12 23:00:36,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:00:36,365 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:00:36,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:00:36,366 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:00:36,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 23:00:41,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:00:41,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 1988 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-12 23:00:41,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:00:44,094 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-12 23:00:44,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:00:46,774 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-11-12 23:00:46,775 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:00:46,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1671522291] [2021-11-12 23:00:46,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1671522291] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:00:46,775 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:00:46,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [12] total 19 [2021-11-12 23:00:46,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199932526] [2021-11-12 23:00:46,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:00:46,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:00:46,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:00:46,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:00:46,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-11-12 23:00:46,777 INFO L87 Difference]: Start difference. First operand 201 states and 286 transitions. Second operand has 12 states, 11 states have (on average 5.545454545454546) internal successors, (61), 11 states have internal predecessors, (61), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-12 23:00:49,043 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.26s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:00:51,058 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:00:56,040 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:00:58,060 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 23:00:59,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:00:59,684 INFO L93 Difference]: Finished difference Result 400 states and 601 transitions. [2021-11-12 23:00:59,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-12 23:00:59,688 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 5.545454545454546) internal successors, (61), 11 states have internal predecessors, (61), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 123 [2021-11-12 23:00:59,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:00:59,691 INFO L225 Difference]: With dead ends: 400 [2021-11-12 23:00:59,691 INFO L226 Difference]: Without dead ends: 210 [2021-11-12 23:00:59,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 226 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-11-12 23:00:59,694 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 38 mSDsluCounter, 1659 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 2 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10442.87ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 1855 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.23ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 319 IncrementalHoareTripleChecker+Unchecked, 10839.88ms IncrementalHoareTripleChecker+Time [2021-11-12 23:00:59,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 1855 Invalid, 567 Unknown, 0 Unchecked, 10.23ms Time], IncrementalHoareTripleChecker [2 Valid, 242 Invalid, 4 Unknown, 319 Unchecked, 10839.88ms Time] [2021-11-12 23:00:59,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-11-12 23:00:59,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 206. [2021-11-12 23:00:59,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 127 states have (on average 1.1968503937007875) internal successors, (152), 130 states have internal predecessors, (152), 63 states have call successors, (63), 14 states have call predecessors, (63), 15 states have return successors, (85), 61 states have call predecessors, (85), 62 states have call successors, (85) [2021-11-12 23:00:59,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 300 transitions. [2021-11-12 23:00:59,722 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 300 transitions. Word has length 123 [2021-11-12 23:00:59,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:00:59,723 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 300 transitions. [2021-11-12 23:00:59,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 5.545454545454546) internal successors, (61), 11 states have internal predecessors, (61), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-12 23:00:59,723 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 300 transitions. [2021-11-12 23:00:59,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-12 23:00:59,726 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:00:59,727 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:00:59,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 23:00:59,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:00:59,940 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:00:59,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:00:59,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1358910515, now seen corresponding path program 1 times [2021-11-12 23:00:59,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:00:59,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [176351597] [2021-11-12 23:00:59,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:00:59,945 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:00:59,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:00:59,946 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:00:59,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 23:01:04,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:01:05,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 1989 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:01:05,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:01:05,517 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-12 23:01:05,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:01:05,923 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-11-12 23:01:05,923 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:01:05,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [176351597] [2021-11-12 23:01:05,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [176351597] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:01:05,923 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:01:05,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2021-11-12 23:01:05,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244796426] [2021-11-12 23:01:05,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:01:05,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:01:05,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:01:05,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:01:05,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:01:05,925 INFO L87 Difference]: Start difference. First operand 206 states and 300 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-12 23:01:06,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:01:06,013 INFO L93 Difference]: Finished difference Result 404 states and 599 transitions. [2021-11-12 23:01:06,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:01:06,014 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 123 [2021-11-12 23:01:06,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:01:06,018 INFO L225 Difference]: With dead ends: 404 [2021-11-12 23:01:06,018 INFO L226 Difference]: Without dead ends: 210 [2021-11-12 23:01:06,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:01:06,021 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 34 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 46.34ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.79ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 52.06ms IncrementalHoareTripleChecker+Time [2021-11-12 23:01:06,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 577 Invalid, 13 Unknown, 0 Unchecked, 1.79ms Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 52.06ms Time] [2021-11-12 23:01:06,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-11-12 23:01:06,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 202. [2021-11-12 23:01:06,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 123 states have (on average 1.1788617886178863) internal successors, (145), 126 states have internal predecessors, (145), 63 states have call successors, (63), 14 states have call predecessors, (63), 15 states have return successors, (85), 61 states have call predecessors, (85), 62 states have call successors, (85) [2021-11-12 23:01:06,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 293 transitions. [2021-11-12 23:01:06,045 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 293 transitions. Word has length 123 [2021-11-12 23:01:06,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:01:06,046 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 293 transitions. [2021-11-12 23:01:06,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-12 23:01:06,046 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 293 transitions. [2021-11-12 23:01:06,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-12 23:01:06,049 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:01:06,049 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:01:06,116 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-12 23:01:06,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:01:06,263 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:01:06,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:01:06,263 INFO L85 PathProgramCache]: Analyzing trace with hash 517572303, now seen corresponding path program 1 times [2021-11-12 23:01:06,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:01:06,268 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [115264541] [2021-11-12 23:01:06,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:01:06,268 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:01:06,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:01:06,269 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:01:06,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 23:01:11,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:01:11,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 1986 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:01:11,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:01:12,132 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-12 23:01:12,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:01:12,798 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-11-12 23:01:12,798 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:01:12,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [115264541] [2021-11-12 23:01:12,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [115264541] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:01:12,799 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:01:12,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 10 [2021-11-12 23:01:12,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659462511] [2021-11-12 23:01:12,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:01:12,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-12 23:01:12,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:01:12,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-12 23:01:12,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:01:12,801 INFO L87 Difference]: Start difference. First operand 202 states and 293 transitions. Second operand has 9 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-12 23:01:13,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:01:13,454 INFO L93 Difference]: Finished difference Result 403 states and 604 transitions. [2021-11-12 23:01:13,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 23:01:13,456 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 123 [2021-11-12 23:01:13,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:01:13,461 INFO L225 Difference]: With dead ends: 403 [2021-11-12 23:01:13,461 INFO L226 Difference]: Without dead ends: 211 [2021-11-12 23:01:13,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:01:13,465 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 12 mSDsluCounter, 1236 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 464.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1419 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.86ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 514.66ms IncrementalHoareTripleChecker+Time [2021-11-12 23:01:13,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 1419 Invalid, 152 Unknown, 0 Unchecked, 5.86ms Time], IncrementalHoareTripleChecker [3 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 514.66ms Time] [2021-11-12 23:01:13,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-11-12 23:01:13,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 202. [2021-11-12 23:01:13,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 123 states have (on average 1.1788617886178863) internal successors, (145), 126 states have internal predecessors, (145), 63 states have call successors, (63), 14 states have call predecessors, (63), 15 states have return successors, (85), 61 states have call predecessors, (85), 62 states have call successors, (85) [2021-11-12 23:01:13,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 293 transitions. [2021-11-12 23:01:13,502 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 293 transitions. Word has length 123 [2021-11-12 23:01:13,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:01:13,502 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 293 transitions. [2021-11-12 23:01:13,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-12 23:01:13,503 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 293 transitions. [2021-11-12 23:01:13,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-12 23:01:13,506 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:01:13,506 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:01:13,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 23:01:13,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:01:13,731 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:01:13,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:01:13,731 INFO L85 PathProgramCache]: Analyzing trace with hash -257858412, now seen corresponding path program 1 times [2021-11-12 23:01:13,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:01:13,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [631312672] [2021-11-12 23:01:13,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:01:13,737 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:01:13,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:01:13,740 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:01:13,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 23:01:18,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:01:19,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 1990 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:01:19,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:01:19,632 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-12 23:01:19,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:01:20,242 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-12 23:01:20,242 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:01:20,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [631312672] [2021-11-12 23:01:20,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [631312672] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:01:20,242 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:01:20,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2021-11-12 23:01:20,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531963739] [2021-11-12 23:01:20,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:01:20,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:01:20,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:01:20,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:01:20,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:01:20,245 INFO L87 Difference]: Start difference. First operand 202 states and 293 transitions. Second operand has 6 states, 5 states have (on average 12.4) internal successors, (62), 6 states have internal predecessors, (62), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 4 states have call successors, (19) [2021-11-12 23:01:22,192 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:01:24,214 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:01:26,231 WARN L515 Checker$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 23:01:26,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:01:26,644 INFO L93 Difference]: Finished difference Result 340 states and 497 transitions. [2021-11-12 23:01:26,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:01:26,645 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 12.4) internal successors, (62), 6 states have internal predecessors, (62), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 4 states have call successors, (19) Word has length 125 [2021-11-12 23:01:26,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:01:26,648 INFO L225 Difference]: With dead ends: 340 [2021-11-12 23:01:26,648 INFO L226 Difference]: Without dead ends: 202 [2021-11-12 23:01:26,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 244 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 23:01:26,651 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 63 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 46 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6246.10ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 813 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.34ms SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6348.89ms IncrementalHoareTripleChecker+Time [2021-11-12 23:01:26,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 813 Invalid, 107 Unknown, 0 Unchecked, 3.34ms Time], IncrementalHoareTripleChecker [46 Valid, 59 Invalid, 2 Unknown, 0 Unchecked, 6348.89ms Time] [2021-11-12 23:01:26,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-11-12 23:01:26,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 168. [2021-11-12 23:01:26,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 106 states have (on average 1.179245283018868) internal successors, (125), 108 states have internal predecessors, (125), 46 states have call successors, (46), 14 states have call predecessors, (46), 15 states have return successors, (56), 45 states have call predecessors, (56), 45 states have call successors, (56) [2021-11-12 23:01:26,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 227 transitions. [2021-11-12 23:01:26,667 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 227 transitions. Word has length 125 [2021-11-12 23:01:26,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:01:26,668 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 227 transitions. [2021-11-12 23:01:26,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 12.4) internal successors, (62), 6 states have internal predecessors, (62), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 4 states have call successors, (19) [2021-11-12 23:01:26,669 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 227 transitions. [2021-11-12 23:01:26,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-12 23:01:26,672 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:01:26,672 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:01:26,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 23:01:26,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:01:26,888 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:01:26,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:01:26,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1951625386, now seen corresponding path program 1 times [2021-11-12 23:01:26,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:01:26,893 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [577209277] [2021-11-12 23:01:26,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:01:26,893 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:01:26,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:01:26,894 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:01:26,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 23:01:32,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:01:32,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 2016 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:01:32,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:01:32,881 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-12 23:01:32,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:01:33,519 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-11-12 23:01:33,519 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:01:33,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [577209277] [2021-11-12 23:01:33,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [577209277] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:01:33,520 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:01:33,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2021-11-12 23:01:33,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142136074] [2021-11-12 23:01:33,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:01:33,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:01:33,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:01:33,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:01:33,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:01:33,522 INFO L87 Difference]: Start difference. First operand 168 states and 227 transitions. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2021-11-12 23:01:35,598 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:01:35,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:01:35,922 INFO L93 Difference]: Finished difference Result 293 states and 398 transitions. [2021-11-12 23:01:35,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:01:35,923 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) Word has length 137 [2021-11-12 23:01:35,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:01:35,925 INFO L225 Difference]: With dead ends: 293 [2021-11-12 23:01:35,926 INFO L226 Difference]: Without dead ends: 165 [2021-11-12 23:01:35,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 268 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 23:01:35,928 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 62 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 39 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2298.97ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 829 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.74ms SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2355.96ms IncrementalHoareTripleChecker+Time [2021-11-12 23:01:35,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 829 Invalid, 82 Unknown, 0 Unchecked, 2.74ms Time], IncrementalHoareTripleChecker [39 Valid, 42 Invalid, 1 Unknown, 0 Unchecked, 2355.96ms Time] [2021-11-12 23:01:35,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-11-12 23:01:35,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2021-11-12 23:01:35,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 104 states have (on average 1.1730769230769231) internal successors, (122), 105 states have internal predecessors, (122), 46 states have call successors, (46), 14 states have call predecessors, (46), 14 states have return successors, (52), 45 states have call predecessors, (52), 45 states have call successors, (52) [2021-11-12 23:01:35,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 220 transitions. [2021-11-12 23:01:35,943 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 220 transitions. Word has length 137 [2021-11-12 23:01:35,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:01:35,944 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 220 transitions. [2021-11-12 23:01:35,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2021-11-12 23:01:35,945 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 220 transitions. [2021-11-12 23:01:35,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-12 23:01:35,948 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:01:35,948 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:01:36,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 23:01:36,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:01:36,162 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:01:36,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:01:36,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1702496139, now seen corresponding path program 1 times [2021-11-12 23:01:36,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:01:36,167 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1099876748] [2021-11-12 23:01:36,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:01:36,167 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:01:36,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:01:36,168 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:01:36,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 23:01:41,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:01:41,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 2029 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-12 23:01:41,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:01:46,832 INFO L354 Elim1Store]: treesize reduction 64, result has 1.5 percent of original size [2021-11-12 23:01:46,832 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 23:01:47,748 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 89 proven. 16 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-12 23:01:47,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:02:07,201 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-12 23:02:07,202 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:02:07,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1099876748] [2021-11-12 23:02:07,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1099876748] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:02:07,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [810255131] [2021-11-12 23:02:07,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:02:07,203 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:02:07,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:02:07,210 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:02:07,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-12 23:02:12,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:02:12,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 2029 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-12 23:02:12,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:02:12,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:12,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:12,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:12,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:12,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:12,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:12,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:12,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:12,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:12,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:12,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:12,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:12,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:12,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:12,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:12,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:12,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:12,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:12,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:12,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:12,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:12,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:12,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:12,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:12,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:12,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:12,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:12,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:12,675 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:02:12,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 563 treesize of output 179 [2021-11-12 23:02:12,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:12,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:12,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:12,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:12,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:12,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:12,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:12,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:12,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:12,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:12,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:12,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:12,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:12,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:12,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:12,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:12,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:12,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:12,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:12,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:12,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:12,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:12,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:12,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:12,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:12,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:12,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:12,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:12,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:12,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:12,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:12,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:12,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:12,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:12,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:12,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:12,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 36 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 179 treesize of output 193 [2021-11-12 23:02:15,173 INFO L354 Elim1Store]: treesize reduction 64, result has 1.5 percent of original size [2021-11-12 23:02:15,174 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 23:02:15,697 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 89 proven. 16 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-12 23:02:15,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:02:27,175 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-12 23:02:27,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [810255131] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:02:27,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167786241] [2021-11-12 23:02:27,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:02:27,176 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:02:27,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:02:27,179 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:02:27,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-12 23:02:29,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:02:29,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 2029 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-12 23:02:29,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:02:30,749 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 18 treesize of output 14 [2021-11-12 23:02:35,316 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:02:35,318 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 481 [2021-11-12 23:02:35,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 481 treesize of output 464 [2021-11-12 23:02:35,353 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:02:35,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 464 treesize of output 424 [2021-11-12 23:02:35,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:35,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:35,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:35,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:35,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:35,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:35,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:35,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:35,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:35,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:35,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:35,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:35,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:35,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:35,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:35,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:35,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:35,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:35,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:35,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:35,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:35,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:35,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:35,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:35,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:35,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:35,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:35,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:35,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:35,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:35,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:35,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:35,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:35,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:35,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:35,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:35,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:35,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:35,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:35,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:35,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:35,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:35,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:35,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:35,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:35,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:35,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:35,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:35,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:35,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:35,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:35,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:35,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:35,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:35,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:35,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:35,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:35,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:35,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:35,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:35,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:35,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:35,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:35,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:35,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:35,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:35,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:35,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:35,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:35,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:35,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:35,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:35,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:35,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:35,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:35,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:35,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:35,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:35,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:35,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:35,657 INFO L244 Elim1Store]: Index analysis took 162 ms [2021-11-12 23:02:35,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 45 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 95 [2021-11-12 23:02:43,351 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-12 23:02:43,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:02:49,168 INFO L354 Elim1Store]: treesize reduction 1602, result has 1.0 percent of original size [2021-11-12 23:02:49,169 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 8 case distinctions, treesize of input 130 treesize of output 38 [2021-11-12 23:02:49,176 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 34 [2021-11-12 23:02:49,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2021-11-12 23:02:50,167 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 40 treesize of output 34 [2021-11-12 23:02:50,376 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-11-12 23:02:50,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167786241] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:02:50,377 INFO L186 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2021-11-12 23:02:50,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [19, 14, 19, 14, 14] total 52 [2021-11-12 23:02:50,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051152696] [2021-11-12 23:02:50,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:02:50,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-12 23:02:50,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:02:50,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-12 23:02:50,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=2461, Unknown=3, NotChecked=0, Total=2652 [2021-11-12 23:02:50,380 INFO L87 Difference]: Start difference. First operand 165 states and 220 transitions. Second operand has 17 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 8 states have call successors, (20), 4 states have call predecessors, (20), 7 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) [2021-11-12 23:02:52,837 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.45s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:02:54,847 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:02:59,387 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:03:03,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:03:03,899 INFO L93 Difference]: Finished difference Result 374 states and 516 transitions. [2021-11-12 23:03:03,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-12 23:03:03,900 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 8 states have call successors, (20), 4 states have call predecessors, (20), 7 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) Word has length 143 [2021-11-12 23:03:03,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:03:03,904 INFO L225 Difference]: With dead ends: 374 [2021-11-12 23:03:03,904 INFO L226 Difference]: Without dead ends: 270 [2021-11-12 23:03:03,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 863 GetRequests, 778 SyntacticMatches, 26 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1321 ImplicationChecksByTransitivity, 49.6s TimeCoverageRelationStatistics Valid=255, Invalid=3402, Unknown=3, NotChecked=0, Total=3660 [2021-11-12 23:03:03,908 INFO L933 BasicCegarLoop]: 265 mSDtfsCounter, 115 mSDsluCounter, 882 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 58 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9598.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 1147 SdHoareTripleChecker+Invalid, 1032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.82ms SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 413 IncrementalHoareTripleChecker+Unchecked, 10070.08ms IncrementalHoareTripleChecker+Time [2021-11-12 23:03:03,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 1147 Invalid, 1032 Unknown, 0 Unchecked, 15.82ms Time], IncrementalHoareTripleChecker [58 Valid, 558 Invalid, 3 Unknown, 413 Unchecked, 10070.08ms Time] [2021-11-12 23:03:03,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-11-12 23:03:03,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 222. [2021-11-12 23:03:03,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 148 states have (on average 1.1689189189189189) internal successors, (173), 152 states have internal predecessors, (173), 53 states have call successors, (53), 17 states have call predecessors, (53), 20 states have return successors, (69), 52 states have call predecessors, (69), 52 states have call successors, (69) [2021-11-12 23:03:03,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 295 transitions. [2021-11-12 23:03:03,931 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 295 transitions. Word has length 143 [2021-11-12 23:03:03,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:03:03,932 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 295 transitions. [2021-11-12 23:03:03,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 8 states have call successors, (20), 4 states have call predecessors, (20), 7 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) [2021-11-12 23:03:03,933 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 295 transitions. [2021-11-12 23:03:03,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-12 23:03:03,936 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:03:03,936 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:03:04,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-12 23:03:04,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 23:03:04,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-12 23:03:04,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:03:04,559 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:03:04,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:03:04,561 INFO L85 PathProgramCache]: Analyzing trace with hash -671455241, now seen corresponding path program 1 times [2021-11-12 23:03:04,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:03:04,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1678962203] [2021-11-12 23:03:04,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:03:04,565 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:03:04,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:03:04,569 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:03:04,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-12 23:03:09,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:03:09,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 2032 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-12 23:03:09,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:03:14,780 INFO L354 Elim1Store]: treesize reduction 64, result has 1.5 percent of original size [2021-11-12 23:03:14,780 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 23:03:15,773 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 89 proven. 16 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-12 23:03:15,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:03:33,143 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-12 23:03:33,143 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:03:33,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1678962203] [2021-11-12 23:03:33,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1678962203] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:03:33,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1306388212] [2021-11-12 23:03:33,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:03:33,144 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:03:33,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:03:33,145 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:03:33,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-12 23:03:38,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:03:38,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 2032 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-12 23:03:38,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:03:38,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:03:38,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:03:38,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:03:38,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:03:38,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:03:38,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:03:38,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:03:38,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:03:38,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:03:38,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:03:38,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:03:38,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:03:38,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:03:38,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:03:38,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:03:38,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:03:38,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:03:38,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:03:38,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:03:38,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:03:38,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:03:38,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:03:38,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:03:38,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:03:38,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:03:38,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:03:38,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:03:38,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:03:38,797 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:03:38,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 563 treesize of output 179 [2021-11-12 23:03:38,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:03:38,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:03:38,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:03:38,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:03:38,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:03:38,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:03:38,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:03:38,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:03:38,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:03:38,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:03:38,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:03:38,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:03:38,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:03:38,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:03:38,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:03:38,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:03:38,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:03:38,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:03:38,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:03:38,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:03:38,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:03:38,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:03:38,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:03:38,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:03:38,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:03:38,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:03:38,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:03:38,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:03:38,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:03:38,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:03:38,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:03:38,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:03:38,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:03:38,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:03:38,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:03:38,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:03:38,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 36 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 179 treesize of output 193 [2021-11-12 23:03:41,703 INFO L354 Elim1Store]: treesize reduction 64, result has 1.5 percent of original size [2021-11-12 23:03:41,703 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 23:03:42,150 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 89 proven. 16 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-12 23:03:42,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:03:53,943 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-12 23:03:53,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1306388212] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:03:53,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779319431] [2021-11-12 23:03:53,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:03:53,944 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:03:53,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:03:53,945 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:03:53,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-12 23:03:55,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:03:56,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 2032 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-12 23:03:56,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:03:57,641 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 18 treesize of output 14 [2021-11-12 23:04:02,500 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:02,502 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 481 [2021-11-12 23:04:02,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 481 treesize of output 464 [2021-11-12 23:04:02,529 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:02,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 464 treesize of output 424 [2021-11-12 23:04:02,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:02,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:02,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:02,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:02,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:02,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:02,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:02,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:02,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:02,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:02,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:02,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:02,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:02,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:02,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:02,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:02,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:02,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:02,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:02,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:02,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:02,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:02,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:02,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:02,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:02,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:02,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:02,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:02,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:02,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:02,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:02,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:02,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:02,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:02,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:02,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:02,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:02,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:02,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:02,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:02,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:02,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:02,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:02,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:02,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:02,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:02,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:02,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:02,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:02,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:02,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:02,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:02,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:02,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:02,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:02,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:02,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:02,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:02,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:02,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:02,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:02,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:02,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:02,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:02,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:02,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:02,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:02,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:02,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:02,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:02,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:02,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:02,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:02,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:02,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:02,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:02,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:02,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:02,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:02,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:02,841 INFO L244 Elim1Store]: Index analysis took 165 ms [2021-11-12 23:04:02,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 45 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 95 [2021-11-12 23:04:10,474 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-12 23:04:10,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:04:17,138 INFO L354 Elim1Store]: treesize reduction 1602, result has 1.0 percent of original size [2021-11-12 23:04:17,138 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 8 case distinctions, treesize of input 130 treesize of output 38 [2021-11-12 23:04:17,145 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 34 [2021-11-12 23:04:17,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2021-11-12 23:04:18,073 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 40 treesize of output 34 [2021-11-12 23:04:18,280 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-11-12 23:04:18,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779319431] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:04:18,281 INFO L186 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2021-11-12 23:04:18,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [19, 14, 19, 14, 14] total 52 [2021-11-12 23:04:18,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391477415] [2021-11-12 23:04:18,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:04:18,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-12 23:04:18,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:04:18,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-12 23:04:18,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=2461, Unknown=3, NotChecked=0, Total=2652 [2021-11-12 23:04:18,284 INFO L87 Difference]: Start difference. First operand 222 states and 295 transitions. Second operand has 17 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 8 states have call successors, (20), 4 states have call predecessors, (20), 7 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) [2021-11-12 23:04:20,530 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.24s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:04:22,542 WARN L515 Checker$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 23:04:24,551 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:04:26,568 WARN L515 Checker$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 23:04:31,246 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:04:36,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:04:36,808 INFO L93 Difference]: Finished difference Result 420 states and 574 transitions. [2021-11-12 23:04:36,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-12 23:04:36,809 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 8 states have call successors, (20), 4 states have call predecessors, (20), 7 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) Word has length 143 [2021-11-12 23:04:36,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:04:36,813 INFO L225 Difference]: With dead ends: 420 [2021-11-12 23:04:36,813 INFO L226 Difference]: Without dead ends: 316 [2021-11-12 23:04:36,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 863 GetRequests, 778 SyntacticMatches, 26 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1318 ImplicationChecksByTransitivity, 49.1s TimeCoverageRelationStatistics Valid=248, Invalid=3409, Unknown=3, NotChecked=0, Total=3660 [2021-11-12 23:04:36,817 INFO L933 BasicCegarLoop]: 244 mSDtfsCounter, 111 mSDsluCounter, 1298 mSDsCounter, 0 mSdLazyCounter, 886 mSolverCounterSat, 68 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14624.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 1542 SdHoareTripleChecker+Invalid, 1411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 18.56ms SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 886 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 452 IncrementalHoareTripleChecker+Unchecked, 15227.40ms IncrementalHoareTripleChecker+Time [2021-11-12 23:04:36,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 1542 Invalid, 1411 Unknown, 0 Unchecked, 18.56ms Time], IncrementalHoareTripleChecker [68 Valid, 886 Invalid, 5 Unknown, 452 Unchecked, 15227.40ms Time] [2021-11-12 23:04:36,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-11-12 23:04:36,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 211. [2021-11-12 23:04:36,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 141 states have (on average 1.1702127659574468) internal successors, (165), 144 states have internal predecessors, (165), 50 states have call successors, (50), 17 states have call predecessors, (50), 19 states have return successors, (55), 49 states have call predecessors, (55), 49 states have call successors, (55) [2021-11-12 23:04:36,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 270 transitions. [2021-11-12 23:04:36,840 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 270 transitions. Word has length 143 [2021-11-12 23:04:36,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:04:36,841 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 270 transitions. [2021-11-12 23:04:36,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 8 states have call successors, (20), 4 states have call predecessors, (20), 7 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) [2021-11-12 23:04:36,842 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 270 transitions. [2021-11-12 23:04:36,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-12 23:04:36,844 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:04:36,845 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:04:36,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-11-12 23:04:37,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-12 23:04:37,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-12 23:04:37,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:04:37,463 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:04:37,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:04:37,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1560381467, now seen corresponding path program 1 times [2021-11-12 23:04:37,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:04:37,468 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [501915921] [2021-11-12 23:04:37,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:04:37,468 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:04:37,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:04:37,469 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:04:37,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3bb812-5ec0-43a3-9b42-10a077fa5178/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-12 23:04:42,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:04:42,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 2045 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-12 23:04:42,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:04:48,138 INFO L354 Elim1Store]: treesize reduction 64, result has 1.5 percent of original size [2021-11-12 23:04:48,139 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 23:04:48,977 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 97 proven. 16 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-12 23:04:48,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:04:57,435 INFO L354 Elim1Store]: treesize reduction 1572, result has 0.1 percent of original size [2021-11-12 23:04:57,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 252 treesize of output 1 [2021-11-12 23:05:36,457 WARN L227 SmtUtils]: Spent 27.41s on a formula simplification. DAG size of input: 1166 DAG size of output: 513 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-12 23:05:36,464 INFO L354 Elim1Store]: treesize reduction 2280, result has 39.2 percent of original size [2021-11-12 23:05:36,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 24 select indices, 24 select index equivalence classes, 0 disjoint index pairs (out of 276 index pairs), introduced 24 new quantified variables, introduced 276 case distinctions, treesize of input 252 treesize of output 1538