./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_c_str_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_34e3465c-9083-4f30-9566-1a4997fe7b6e/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34e3465c-9083-4f30-9566-1a4997fe7b6e/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_34e3465c-9083-4f30-9566-1a4997fe7b6e/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34e3465c-9083-4f30-9566-1a4997fe7b6e/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_c_str_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34e3465c-9083-4f30-9566-1a4997fe7b6e/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_34e3465c-9083-4f30-9566-1a4997fe7b6e/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 9e4ccc391c063e90fb229c8b3638d2f1089d6ba2ff288522cf06bf650b1be9e5 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:40:50,196 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:40:50,198 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:40:50,269 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:40:50,270 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:40:50,275 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:40:50,277 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:40:50,281 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:40:50,284 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:40:50,290 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:40:50,291 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:40:50,293 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:40:50,294 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:40:50,296 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:40:50,299 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:40:50,307 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:40:50,310 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:40:50,311 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:40:50,313 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:40:50,323 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:40:50,325 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:40:50,326 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:40:50,330 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:40:50,332 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:40:50,343 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:40:50,343 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:40:50,344 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:40:50,346 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:40:50,347 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:40:50,349 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:40:50,349 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:40:50,351 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:40:50,353 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:40:50,355 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:40:50,356 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:40:50,357 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:40:50,358 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:40:50,358 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:40:50,358 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:40:50,359 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:40:50,360 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:40:50,361 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34e3465c-9083-4f30-9566-1a4997fe7b6e/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-12 23:40:50,418 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:40:50,419 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:40:50,420 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:40:50,420 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:40:50,421 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:40:50,421 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:40:50,421 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:40:50,421 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:40:50,422 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:40:50,422 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:40:50,423 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:40:50,423 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:40:50,424 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:40:50,424 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:40:50,424 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:40:50,424 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:40:50,425 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:40:50,425 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:40:50,426 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:40:50,426 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:40:50,426 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:40:50,426 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:40:50,426 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:40:50,427 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:40:50,427 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:40:50,427 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:40:50,427 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:40:50,428 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:40:50,428 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:40:50,430 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:40:50,430 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:40:50,430 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:40:50,431 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:40:50,431 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:40:50,431 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:40:50,431 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:40:50,432 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:40:50,432 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_34e3465c-9083-4f30-9566-1a4997fe7b6e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34e3465c-9083-4f30-9566-1a4997fe7b6e/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9e4ccc391c063e90fb229c8b3638d2f1089d6ba2ff288522cf06bf650b1be9e5 [2021-11-12 23:40:50,821 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:40:50,861 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:40:50,864 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:40:50,865 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:40:50,867 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:40:50,868 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34e3465c-9083-4f30-9566-1a4997fe7b6e/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_c_str_harness.i [2021-11-12 23:40:50,947 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34e3465c-9083-4f30-9566-1a4997fe7b6e/bin/utaipan-vmNK8stdcF/data/d470c33b7/939812bfc4d043b8bdc896490acd9e02/FLAG04e520a14 [2021-11-12 23:40:52,017 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:40:52,018 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34e3465c-9083-4f30-9566-1a4997fe7b6e/sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_c_str_harness.i [2021-11-12 23:40:52,066 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34e3465c-9083-4f30-9566-1a4997fe7b6e/bin/utaipan-vmNK8stdcF/data/d470c33b7/939812bfc4d043b8bdc896490acd9e02/FLAG04e520a14 [2021-11-12 23:40:52,411 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34e3465c-9083-4f30-9566-1a4997fe7b6e/bin/utaipan-vmNK8stdcF/data/d470c33b7/939812bfc4d043b8bdc896490acd9e02 [2021-11-12 23:40:52,414 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:40:52,416 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:40:52,417 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:40:52,418 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:40:52,421 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:40:52,422 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:40:52" (1/1) ... [2021-11-12 23:40:52,424 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55f529ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:40:52, skipping insertion in model container [2021-11-12 23:40:52,424 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:40:52" (1/1) ... [2021-11-12 23:40:52,432 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:40:52,548 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:40:52,861 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_34e3465c-9083-4f30-9566-1a4997fe7b6e/sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_c_str_harness.i[4495,4508] [2021-11-12 23:40:52,868 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_34e3465c-9083-4f30-9566-1a4997fe7b6e/sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_c_str_harness.i[4555,4568] [2021-11-12 23:40:52,888 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-12 23:40:52,894 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-12 23:40:53,848 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:40:53,849 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:40:53,850 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:40:53,851 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:40:53,855 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:40:53,876 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:40:53,881 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:40:53,886 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:40:53,886 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:40:54,344 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-12 23:40:54,345 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-12 23:40:54,347 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-12 23:40:54,348 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-12 23:40:54,350 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-12 23:40:54,351 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-12 23:40:54,351 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-12 23:40:54,352 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-12 23:40:54,353 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-12 23:40:54,354 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-12 23:40:54,571 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-12 23:40:54,717 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:40:54,717 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:40:54,842 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:40:54,897 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-12 23:40:54,898 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2cb68fab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:40:54, skipping insertion in model container [2021-11-12 23:40:54,898 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:40:54,898 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 23:40:54,901 INFO L158 Benchmark]: Toolchain (without parser) took 2483.48ms. Allocated memory was 113.2MB in the beginning and 153.1MB in the end (delta: 39.8MB). Free memory was 88.3MB in the beginning and 111.9MB in the end (delta: -23.6MB). Peak memory consumption was 62.2MB. Max. memory is 16.1GB. [2021-11-12 23:40:54,901 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 113.2MB. Free memory is still 89.6MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:40:54,902 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2480.93ms. Allocated memory was 113.2MB in the beginning and 153.1MB in the end (delta: 39.8MB). Free memory was 87.9MB in the beginning and 111.9MB in the end (delta: -24.0MB). Peak memory consumption was 62.2MB. Max. memory is 16.1GB. [2021-11-12 23:40:54,904 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 113.2MB. Free memory is still 89.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2480.93ms. Allocated memory was 113.2MB in the beginning and 153.1MB in the end (delta: 39.8MB). Free memory was 87.9MB in the beginning and 111.9MB in the end (delta: -24.0MB). Peak memory consumption was 62.2MB. 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_34e3465c-9083-4f30-9566-1a4997fe7b6e/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34e3465c-9083-4f30-9566-1a4997fe7b6e/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_34e3465c-9083-4f30-9566-1a4997fe7b6e/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34e3465c-9083-4f30-9566-1a4997fe7b6e/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_c_str_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34e3465c-9083-4f30-9566-1a4997fe7b6e/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_34e3465c-9083-4f30-9566-1a4997fe7b6e/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 9e4ccc391c063e90fb229c8b3638d2f1089d6ba2ff288522cf06bf650b1be9e5 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:40:57,155 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:40:57,157 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:40:57,192 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:40:57,193 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:40:57,194 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:40:57,196 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:40:57,198 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:40:57,201 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:40:57,202 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:40:57,203 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:40:57,205 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:40:57,205 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:40:57,206 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:40:57,208 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:40:57,210 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:40:57,211 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:40:57,212 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:40:57,214 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:40:57,217 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:40:57,218 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:40:57,220 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:40:57,221 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:40:57,223 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:40:57,226 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:40:57,227 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:40:57,227 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:40:57,228 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:40:57,229 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:40:57,230 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:40:57,231 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:40:57,232 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:40:57,233 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:40:57,234 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:40:57,235 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:40:57,235 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:40:57,236 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:40:57,237 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:40:57,237 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:40:57,238 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:40:57,239 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:40:57,246 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34e3465c-9083-4f30-9566-1a4997fe7b6e/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-12 23:40:57,293 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:40:57,294 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:40:57,295 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:40:57,295 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:40:57,295 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:40:57,296 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:40:57,296 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:40:57,296 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:40:57,296 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:40:57,296 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:40:57,299 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:40:57,299 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:40:57,299 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:40:57,299 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:40:57,299 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:40:57,300 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:40:57,300 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 23:40:57,300 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 23:40:57,300 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:40:57,300 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:40:57,301 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:40:57,301 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:40:57,301 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 23:40:57,301 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:40:57,301 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:40:57,302 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:40:57,302 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:40:57,302 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:40:57,302 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 23:40:57,303 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 23:40:57,303 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:40:57,303 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:40:57,304 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:40:57,304 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_34e3465c-9083-4f30-9566-1a4997fe7b6e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34e3465c-9083-4f30-9566-1a4997fe7b6e/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9e4ccc391c063e90fb229c8b3638d2f1089d6ba2ff288522cf06bf650b1be9e5 [2021-11-12 23:40:57,711 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:40:57,739 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:40:57,742 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:40:57,743 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:40:57,746 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:40:57,747 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34e3465c-9083-4f30-9566-1a4997fe7b6e/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_c_str_harness.i [2021-11-12 23:40:57,846 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34e3465c-9083-4f30-9566-1a4997fe7b6e/bin/utaipan-vmNK8stdcF/data/2c9f3e0e1/98109740ca6749db9922aecb85011561/FLAG740aea705 [2021-11-12 23:40:58,790 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:40:58,791 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34e3465c-9083-4f30-9566-1a4997fe7b6e/sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_c_str_harness.i [2021-11-12 23:40:58,845 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34e3465c-9083-4f30-9566-1a4997fe7b6e/bin/utaipan-vmNK8stdcF/data/2c9f3e0e1/98109740ca6749db9922aecb85011561/FLAG740aea705 [2021-11-12 23:40:59,202 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34e3465c-9083-4f30-9566-1a4997fe7b6e/bin/utaipan-vmNK8stdcF/data/2c9f3e0e1/98109740ca6749db9922aecb85011561 [2021-11-12 23:40:59,207 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:40:59,209 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:40:59,211 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:40:59,212 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:40:59,216 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:40:59,217 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:40:59" (1/1) ... [2021-11-12 23:40:59,218 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e23c38c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:40:59, skipping insertion in model container [2021-11-12 23:40:59,218 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:40:59" (1/1) ... [2021-11-12 23:40:59,227 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:40:59,425 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:40:59,761 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_34e3465c-9083-4f30-9566-1a4997fe7b6e/sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_c_str_harness.i[4495,4508] [2021-11-12 23:40:59,771 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_34e3465c-9083-4f30-9566-1a4997fe7b6e/sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_c_str_harness.i[4555,4568] [2021-11-12 23:40:59,802 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-12 23:40:59,814 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-12 23:41:00,788 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:41:00,789 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:41:00,790 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:41:00,791 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:41:00,792 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:41:00,812 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:41:00,813 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:41:00,816 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:41:00,817 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:41:01,360 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-12 23:41:01,362 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-12 23:41:01,365 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-12 23:41:01,366 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-12 23:41:01,374 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-12 23:41:01,375 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-12 23:41:01,376 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-12 23:41:01,377 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-12 23:41:01,378 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-12 23:41:01,378 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-12 23:41:01,658 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-12 23:41:01,815 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:41:01,816 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:41:01,924 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:41:02,003 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 23:41:02,076 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:41:02,089 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_34e3465c-9083-4f30-9566-1a4997fe7b6e/sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_c_str_harness.i[4495,4508] [2021-11-12 23:41:02,090 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_34e3465c-9083-4f30-9566-1a4997fe7b6e/sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_c_str_harness.i[4555,4568] [2021-11-12 23:41:02,092 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-12 23:41:02,095 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-12 23:41:02,155 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:41:02,156 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:41:02,156 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:41:02,164 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:41:02,166 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:41:02,186 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:41:02,186 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:41:02,188 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:41:02,188 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:41:02,265 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-12 23:41:02,266 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-12 23:41:02,267 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-12 23:41:02,268 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-12 23:41:02,272 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-12 23:41:02,277 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-12 23:41:02,277 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-12 23:41:02,278 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-12 23:41:02,278 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-12 23:41:02,279 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-12 23:41:02,332 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-12 23:41:02,444 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:41:02,444 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:41:02,498 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:41:02,567 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:41:02,598 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_34e3465c-9083-4f30-9566-1a4997fe7b6e/sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_c_str_harness.i[4495,4508] [2021-11-12 23:41:02,599 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_34e3465c-9083-4f30-9566-1a4997fe7b6e/sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_c_str_harness.i[4555,4568] [2021-11-12 23:41:02,601 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-12 23:41:02,602 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-12 23:41:02,680 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:41:02,680 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:41:02,681 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:41:02,681 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:41:02,682 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:41:02,689 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:41:02,689 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:41:02,690 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:41:02,691 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:41:02,731 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-12 23:41:02,732 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-12 23:41:02,732 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-12 23:41:02,733 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-12 23:41:02,734 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-12 23:41:02,734 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-12 23:41:02,735 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-12 23:41:02,735 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-12 23:41:02,735 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-12 23:41:02,736 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-12 23:41:02,765 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-12 23:41:02,877 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:41:02,877 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:41:02,911 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:41:03,298 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:41:03,298 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:41:03 WrapperNode [2021-11-12 23:41:03,299 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:41:03,300 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:41:03,300 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:41:03,301 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:41:03,308 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:41:03" (1/1) ... [2021-11-12 23:41:03,482 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:41:03" (1/1) ... [2021-11-12 23:41:03,612 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:41:03,613 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:41:03,614 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:41:03,614 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:41:03,625 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:41:03" (1/1) ... [2021-11-12 23:41:03,625 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:41:03" (1/1) ... [2021-11-12 23:41:03,657 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:41:03" (1/1) ... [2021-11-12 23:41:03,658 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:41:03" (1/1) ... [2021-11-12 23:41:03,743 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:41:03" (1/1) ... [2021-11-12 23:41:03,763 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:41:03" (1/1) ... [2021-11-12 23:41:03,797 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:41:03" (1/1) ... [2021-11-12 23:41:03,831 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:41:03,833 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:41:03,834 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:41:03,834 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:41:03,835 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:41:03" (1/1) ... [2021-11-12 23:41:03,844 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:41:03,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34e3465c-9083-4f30-9566-1a4997fe7b6e/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:41:03,871 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34e3465c-9083-4f30-9566-1a4997fe7b6e/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:41:03,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34e3465c-9083-4f30-9566-1a4997fe7b6e/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:41:03,932 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_eq_c_str [2021-11-12 23:41:03,933 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_eq_c_str [2021-11-12 23:41:03,933 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2021-11-12 23:41:03,933 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2021-11-12 23:41:03,933 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-12 23:41:03,934 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-11-12 23:41:03,934 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-11-12 23:41:03,934 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 23:41:03,934 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-12 23:41:03,934 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-12 23:41:03,935 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-12 23:41:03,935 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-12 23:41:03,935 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-12 23:41:03,936 INFO L130 BoogieDeclarations]: Found specification of procedure save_byte_from_array [2021-11-12 23:41:03,936 INFO L138 BoogieDeclarations]: Found implementation of procedure save_byte_from_array [2021-11-12 23:41:03,936 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-12 23:41:03,936 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:41:03,936 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:41:03,937 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-12 23:41:03,937 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-12 23:41:03,937 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-12 23:41:03,937 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2021-11-12 23:41:03,937 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2021-11-12 23:41:03,938 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-12 23:41:03,938 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-12 23:41:03,938 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-12 23:41:03,939 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:41:03,939 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-12 23:41:03,939 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-12 23:41:03,939 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-12 23:41:03,939 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-12 23:41:03,940 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-11-12 23:41:03,940 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-11-12 23:41:03,940 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-11-12 23:41:03,941 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-11-12 23:41:19,259 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:41:19,259 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 23:41:19,261 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:41:19 BoogieIcfgContainer [2021-11-12 23:41:19,262 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:41:19,264 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:41:19,264 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:41:19,267 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:41:19,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:40:59" (1/3) ... [2021-11-12 23:41:19,268 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@358af44c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:41:19, skipping insertion in model container [2021-11-12 23:41:19,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:41:03" (2/3) ... [2021-11-12 23:41:19,268 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@358af44c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:41:19, skipping insertion in model container [2021-11-12 23:41:19,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:41:19" (3/3) ... [2021-11-12 23:41:19,270 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_eq_c_str_harness.i [2021-11-12 23:41:19,275 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:41:19,276 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:41:19,324 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:41:19,330 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 23:41:19,330 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 23:41:19,350 INFO L276 IsEmpty]: Start isEmpty. Operand has 142 states, 94 states have (on average 1.2553191489361701) internal successors, (118), 96 states have internal predecessors, (118), 36 states have call successors, (36), 10 states have call predecessors, (36), 10 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2021-11-12 23:41:19,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-12 23:41:19,362 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:41:19,363 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 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] [2021-11-12 23:41:19,364 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:41:19,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:41:19,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1244186500, now seen corresponding path program 1 times [2021-11-12 23:41:19,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:41:19,392 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1763206966] [2021-11-12 23:41:19,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:41:19,393 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:41:19,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34e3465c-9083-4f30-9566-1a4997fe7b6e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:41:19,398 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34e3465c-9083-4f30-9566-1a4997fe7b6e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:41:19,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34e3465c-9083-4f30-9566-1a4997fe7b6e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 23:41:24,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:41:24,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 1972 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-12 23:41:24,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:41:25,077 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-11-12 23:41:25,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:41:25,575 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2021-11-12 23:41:25,590 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:41:25,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1763206966] [2021-11-12 23:41:25,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1763206966] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:41:25,591 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:41:25,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2021-11-12 23:41:25,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323601094] [2021-11-12 23:41:25,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:41:25,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 23:41:25,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:41:25,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 23:41:25,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 23:41:25,632 INFO L87 Difference]: Start difference. First operand has 142 states, 94 states have (on average 1.2553191489361701) internal successors, (118), 96 states have internal predecessors, (118), 36 states have call successors, (36), 10 states have call predecessors, (36), 10 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) Second operand has 2 states, 2 states have (on average 26.5) internal successors, (53), 2 states have internal predecessors, (53), 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 23:41:25,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:41:25,698 INFO L93 Difference]: Finished difference Result 279 states and 401 transitions. [2021-11-12 23:41:25,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 23:41:25,701 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 26.5) internal successors, (53), 2 states have internal predecessors, (53), 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 127 [2021-11-12 23:41:25,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:41:25,712 INFO L225 Difference]: With dead ends: 279 [2021-11-12 23:41:25,716 INFO L226 Difference]: Without dead ends: 137 [2021-11-12 23:41:25,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 252 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 23:41:25,740 INFO L933 BasicCegarLoop]: 187 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, 187 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.90ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-12 23:41:25,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 2.90ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-12 23:41:25,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-11-12 23:41:25,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2021-11-12 23:41:25,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 90 states have (on average 1.2222222222222223) internal successors, (110), 91 states have internal predecessors, (110), 36 states have call successors, (36), 10 states have call predecessors, (36), 10 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2021-11-12 23:41:25,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 181 transitions. [2021-11-12 23:41:25,822 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 181 transitions. Word has length 127 [2021-11-12 23:41:25,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:41:25,824 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 181 transitions. [2021-11-12 23:41:25,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 26.5) internal successors, (53), 2 states have internal predecessors, (53), 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 23:41:25,824 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 181 transitions. [2021-11-12 23:41:25,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-12 23:41:25,829 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:41:25,829 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 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] [2021-11-12 23:41:25,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34e3465c-9083-4f30-9566-1a4997fe7b6e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 23:41:26,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34e3465c-9083-4f30-9566-1a4997fe7b6e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:41:26,046 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:41:26,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:41:26,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1259852002, now seen corresponding path program 1 times [2021-11-12 23:41:26,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:41:26,052 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1644782443] [2021-11-12 23:41:26,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:41:26,053 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:41:26,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34e3465c-9083-4f30-9566-1a4997fe7b6e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:41:26,055 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34e3465c-9083-4f30-9566-1a4997fe7b6e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:41:26,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34e3465c-9083-4f30-9566-1a4997fe7b6e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 23:41:30,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:41:31,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 1972 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:41:31,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:41:31,761 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 110 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-11-12 23:41:31,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:41:32,480 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-11-12 23:41:32,480 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:41:32,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1644782443] [2021-11-12 23:41:32,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1644782443] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:41:32,481 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:41:32,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 5 [2021-11-12 23:41:32,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734721253] [2021-11-12 23:41:32,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:41:32,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:41:32,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:41:32,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:41:32,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:41:32,485 INFO L87 Difference]: Start difference. First operand 137 states and 181 transitions. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 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 23:41:32,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:41:32,788 INFO L93 Difference]: Finished difference Result 244 states and 327 transitions. [2021-11-12 23:41:32,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:41:32,795 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 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 127 [2021-11-12 23:41:32,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:41:32,800 INFO L225 Difference]: With dead ends: 244 [2021-11-12 23:41:32,802 INFO L226 Difference]: Without dead ends: 140 [2021-11-12 23:41:32,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:41:32,807 INFO L933 BasicCegarLoop]: 169 mSDtfsCounter, 57 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 201.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.36ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 253.85ms IncrementalHoareTripleChecker+Time [2021-11-12 23:41:32,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 433 Invalid, 33 Unknown, 0 Unchecked, 8.36ms Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 253.85ms Time] [2021-11-12 23:41:32,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-11-12 23:41:32,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2021-11-12 23:41:32,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 92 states have (on average 1.2173913043478262) internal successors, (112), 94 states have internal predecessors, (112), 36 states have call successors, (36), 10 states have call predecessors, (36), 11 states have return successors, (37), 35 states have call predecessors, (37), 35 states have call successors, (37) [2021-11-12 23:41:32,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 185 transitions. [2021-11-12 23:41:32,860 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 185 transitions. Word has length 127 [2021-11-12 23:41:32,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:41:32,863 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 185 transitions. [2021-11-12 23:41:32,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 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 23:41:32,863 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 185 transitions. [2021-11-12 23:41:32,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-12 23:41:32,874 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:41:32,875 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:41:32,928 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34e3465c-9083-4f30-9566-1a4997fe7b6e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-12 23:41:33,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34e3465c-9083-4f30-9566-1a4997fe7b6e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:41:33,090 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:41:33,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:41:33,091 INFO L85 PathProgramCache]: Analyzing trace with hash -2087307667, now seen corresponding path program 1 times [2021-11-12 23:41:33,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:41:33,098 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [110087533] [2021-11-12 23:41:33,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:41:33,099 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:41:33,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34e3465c-9083-4f30-9566-1a4997fe7b6e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:41:33,100 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34e3465c-9083-4f30-9566-1a4997fe7b6e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:41:33,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34e3465c-9083-4f30-9566-1a4997fe7b6e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 23:41:37,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:41:38,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 1985 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 23:41:38,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:41:38,558 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 23:41:39,953 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-12 23:41:39,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:41:41,287 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 23:41:41,763 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2021-11-12 23:41:41,764 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:41:41,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [110087533] [2021-11-12 23:41:41,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [110087533] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:41:41,764 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:41:41,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [10] total 19 [2021-11-12 23:41:41,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174985586] [2021-11-12 23:41:41,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:41:41,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:41:41,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:41:41,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:41:41,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-12 23:41:41,768 INFO L87 Difference]: Start difference. First operand 140 states and 185 transitions. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 10 states have internal predecessors, (60), 5 states have call successors, (20), 3 states have call predecessors, (20), 4 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2021-11-12 23:41:42,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:41:42,137 INFO L93 Difference]: Finished difference Result 267 states and 353 transitions. [2021-11-12 23:41:42,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-12 23:41:42,139 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 10 states have internal predecessors, (60), 5 states have call successors, (20), 3 states have call predecessors, (20), 4 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 133 [2021-11-12 23:41:42,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:41:42,143 INFO L225 Difference]: With dead ends: 267 [2021-11-12 23:41:42,143 INFO L226 Difference]: Without dead ends: 153 [2021-11-12 23:41:42,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-11-12 23:41:42,145 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 23 mSDsluCounter, 1115 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 199.15ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 1290 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.53ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 237.06ms IncrementalHoareTripleChecker+Time [2021-11-12 23:41:42,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 1290 Invalid, 132 Unknown, 0 Unchecked, 10.53ms Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 98 Unchecked, 237.06ms Time] [2021-11-12 23:41:42,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-11-12 23:41:42,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2021-11-12 23:41:42,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 104 states have (on average 1.2211538461538463) internal successors, (127), 106 states have internal predecessors, (127), 36 states have call successors, (36), 11 states have call predecessors, (36), 12 states have return successors, (38), 35 states have call predecessors, (38), 35 states have call successors, (38) [2021-11-12 23:41:42,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 201 transitions. [2021-11-12 23:41:42,168 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 201 transitions. Word has length 133 [2021-11-12 23:41:42,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:41:42,169 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 201 transitions. [2021-11-12 23:41:42,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 10 states have internal predecessors, (60), 5 states have call successors, (20), 3 states have call predecessors, (20), 4 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2021-11-12 23:41:42,170 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 201 transitions. [2021-11-12 23:41:42,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-12 23:41:42,173 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:41:42,174 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:41:42,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34e3465c-9083-4f30-9566-1a4997fe7b6e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 23:41:42,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34e3465c-9083-4f30-9566-1a4997fe7b6e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:41:42,389 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:41:42,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:41:42,390 INFO L85 PathProgramCache]: Analyzing trace with hash 296617071, now seen corresponding path program 1 times [2021-11-12 23:41:42,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:41:42,394 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [221100213] [2021-11-12 23:41:42,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:41:42,395 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:41:42,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34e3465c-9083-4f30-9566-1a4997fe7b6e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:41:42,396 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34e3465c-9083-4f30-9566-1a4997fe7b6e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:41:42,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34e3465c-9083-4f30-9566-1a4997fe7b6e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 23:41:47,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:41:47,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 1982 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:41:47,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:41:47,616 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 104 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-12 23:41:47,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:41:48,000 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2021-11-12 23:41:48,000 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:41:48,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [221100213] [2021-11-12 23:41:48,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [221100213] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:41:48,001 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:41:48,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2021-11-12 23:41:48,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408161751] [2021-11-12 23:41:48,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:41:48,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:41:48,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:41:48,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:41:48,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:41:48,004 INFO L87 Difference]: Start difference. First operand 153 states and 201 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 23:41:48,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:41:48,085 INFO L93 Difference]: Finished difference Result 270 states and 362 transitions. [2021-11-12 23:41:48,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:41:48,086 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 133 [2021-11-12 23:41:48,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:41:48,089 INFO L225 Difference]: With dead ends: 270 [2021-11-12 23:41:48,090 INFO L226 Difference]: Without dead ends: 159 [2021-11-12 23:41:48,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 262 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 23:41:48,092 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 20 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 46.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.88ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 51.64ms IncrementalHoareTripleChecker+Time [2021-11-12 23:41:48,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 535 Invalid, 16 Unknown, 0 Unchecked, 2.88ms Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 51.64ms Time] [2021-11-12 23:41:48,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-11-12 23:41:48,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 147. [2021-11-12 23:41:48,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 99 states have (on average 1.2222222222222223) internal successors, (121), 100 states have internal predecessors, (121), 36 states have call successors, (36), 11 states have call predecessors, (36), 11 states have return successors, (37), 35 states have call predecessors, (37), 35 states have call successors, (37) [2021-11-12 23:41:48,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 194 transitions. [2021-11-12 23:41:48,112 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 194 transitions. Word has length 133 [2021-11-12 23:41:48,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:41:48,113 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 194 transitions. [2021-11-12 23:41:48,113 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 23:41:48,114 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 194 transitions. [2021-11-12 23:41:48,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-12 23:41:48,116 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:41:48,117 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:41:48,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34e3465c-9083-4f30-9566-1a4997fe7b6e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 23:41:48,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34e3465c-9083-4f30-9566-1a4997fe7b6e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:41:48,330 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:41:48,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:41:48,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1120053813, now seen corresponding path program 1 times [2021-11-12 23:41:48,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:41:48,335 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1161978022] [2021-11-12 23:41:48,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:41:48,336 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:41:48,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34e3465c-9083-4f30-9566-1a4997fe7b6e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:41:48,337 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34e3465c-9083-4f30-9566-1a4997fe7b6e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:41:48,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34e3465c-9083-4f30-9566-1a4997fe7b6e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 23:41:53,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:41:53,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 1994 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:41:53,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:41:54,328 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 104 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-12 23:41:54,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:41:55,059 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2021-11-12 23:41:55,060 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:41:55,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1161978022] [2021-11-12 23:41:55,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1161978022] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:41:55,061 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:41:55,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2021-11-12 23:41:55,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993493426] [2021-11-12 23:41:55,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:41:55,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:41:55,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:41:55,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:41:55,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:41:55,063 INFO L87 Difference]: Start difference. First operand 147 states and 194 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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 23:41:57,285 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.22s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:41:59,299 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:42:00,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:42:00,518 INFO L93 Difference]: Finished difference Result 276 states and 373 transitions. [2021-11-12 23:42:00,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:42:00,521 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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 137 [2021-11-12 23:42:00,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:42:00,524 INFO L225 Difference]: With dead ends: 276 [2021-11-12 23:42:00,524 INFO L226 Difference]: Without dead ends: 167 [2021-11-12 23:42:00,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 266 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 23:42:00,527 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 42 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5079.66ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 631 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.76ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 5279.49ms IncrementalHoareTripleChecker+Time [2021-11-12 23:42:00,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 631 Invalid, 124 Unknown, 0 Unchecked, 4.76ms Time], IncrementalHoareTripleChecker [0 Valid, 82 Invalid, 2 Unknown, 40 Unchecked, 5279.49ms Time] [2021-11-12 23:42:00,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-11-12 23:42:00,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 156. [2021-11-12 23:42:00,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 108 states have (on average 1.2314814814814814) internal successors, (133), 109 states have internal predecessors, (133), 36 states have call successors, (36), 11 states have call predecessors, (36), 11 states have return successors, (37), 35 states have call predecessors, (37), 35 states have call successors, (37) [2021-11-12 23:42:00,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 206 transitions. [2021-11-12 23:42:00,547 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 206 transitions. Word has length 137 [2021-11-12 23:42:00,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:42:00,548 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 206 transitions. [2021-11-12 23:42:00,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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 23:42:00,549 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 206 transitions. [2021-11-12 23:42:00,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-12 23:42:00,551 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:42:00,551 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:42:00,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34e3465c-9083-4f30-9566-1a4997fe7b6e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 23:42:00,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34e3465c-9083-4f30-9566-1a4997fe7b6e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:42:00,765 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:42:00,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:42:00,766 INFO L85 PathProgramCache]: Analyzing trace with hash 2007276659, now seen corresponding path program 1 times [2021-11-12 23:42:00,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:42:00,769 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [878839472] [2021-11-12 23:42:00,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:42:00,770 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:42:00,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34e3465c-9083-4f30-9566-1a4997fe7b6e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:42:00,770 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34e3465c-9083-4f30-9566-1a4997fe7b6e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:42:00,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34e3465c-9083-4f30-9566-1a4997fe7b6e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 23:42:04,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:42:05,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 1991 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-12 23:42:05,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:42:07,240 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 121 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-12 23:42:07,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:42:09,747 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2021-11-12 23:42:09,748 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:42:09,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [878839472] [2021-11-12 23:42:09,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [878839472] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:42:09,748 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:42:09,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [12] total 19 [2021-11-12 23:42:09,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558193620] [2021-11-12 23:42:09,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:42:09,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:42:09,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:42:09,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:42:09,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-11-12 23:42:09,751 INFO L87 Difference]: Start difference. First operand 156 states and 206 transitions. Second operand has 12 states, 11 states have (on average 5.909090909090909) internal successors, (65), 11 states have internal predecessors, (65), 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 23:42:12,128 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.37s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:42:14,142 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:42:18,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:42:18,021 INFO L93 Difference]: Finished difference Result 284 states and 384 transitions. [2021-11-12 23:42:18,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-12 23:42:18,024 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 5.909090909090909) internal successors, (65), 11 states have internal predecessors, (65), 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 137 [2021-11-12 23:42:18,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:42:18,027 INFO L225 Difference]: With dead ends: 284 [2021-11-12 23:42:18,027 INFO L226 Difference]: Without dead ends: 165 [2021-11-12 23:42:18,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 254 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-11-12 23:42:18,029 INFO L933 BasicCegarLoop]: 170 mSDtfsCounter, 38 mSDsluCounter, 1434 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6050.28ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 1604 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.49ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 288 IncrementalHoareTripleChecker+Unchecked, 6348.31ms IncrementalHoareTripleChecker+Time [2021-11-12 23:42:18,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 1604 Invalid, 526 Unknown, 0 Unchecked, 10.49ms Time], IncrementalHoareTripleChecker [2 Valid, 234 Invalid, 2 Unknown, 288 Unchecked, 6348.31ms Time] [2021-11-12 23:42:18,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-11-12 23:42:18,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 161. [2021-11-12 23:42:18,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 112 states have (on average 1.2053571428571428) internal successors, (135), 114 states have internal predecessors, (135), 36 states have call successors, (36), 11 states have call predecessors, (36), 12 states have return successors, (40), 35 states have call predecessors, (40), 35 states have call successors, (40) [2021-11-12 23:42:18,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 211 transitions. [2021-11-12 23:42:18,049 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 211 transitions. Word has length 137 [2021-11-12 23:42:18,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:42:18,050 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 211 transitions. [2021-11-12 23:42:18,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 5.909090909090909) internal successors, (65), 11 states have internal predecessors, (65), 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 23:42:18,051 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 211 transitions. [2021-11-12 23:42:18,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-12 23:42:18,053 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:42:18,054 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:42:18,114 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34e3465c-9083-4f30-9566-1a4997fe7b6e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-11-12 23:42:18,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34e3465c-9083-4f30-9566-1a4997fe7b6e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:42:18,270 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:42:18,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:42:18,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1360293559, now seen corresponding path program 1 times [2021-11-12 23:42:18,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:42:18,274 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1089083020] [2021-11-12 23:42:18,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:42:18,275 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:42:18,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34e3465c-9083-4f30-9566-1a4997fe7b6e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:42:18,276 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34e3465c-9083-4f30-9566-1a4997fe7b6e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:42:18,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34e3465c-9083-4f30-9566-1a4997fe7b6e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 23:42:22,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:42:23,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 1992 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:42:23,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:42:23,565 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 104 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-12 23:42:23,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:42:23,918 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2021-11-12 23:42:23,918 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:42:23,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1089083020] [2021-11-12 23:42:23,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1089083020] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:42:23,919 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:42:23,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2021-11-12 23:42:23,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69360770] [2021-11-12 23:42:23,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:42:23,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:42:23,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:42:23,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:42:23,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:42:23,921 INFO L87 Difference]: Start difference. First operand 161 states and 211 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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 23:42:24,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:42:24,010 INFO L93 Difference]: Finished difference Result 288 states and 382 transitions. [2021-11-12 23:42:24,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:42:24,010 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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 137 [2021-11-12 23:42:24,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:42:24,013 INFO L225 Difference]: With dead ends: 288 [2021-11-12 23:42:24,013 INFO L226 Difference]: Without dead ends: 165 [2021-11-12 23:42:24,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 270 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 23:42:24,015 INFO L933 BasicCegarLoop]: 178 mSDtfsCounter, 34 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 44.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.95ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 61.34ms IncrementalHoareTripleChecker+Time [2021-11-12 23:42:24,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 526 Invalid, 13 Unknown, 0 Unchecked, 1.95ms Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 61.34ms Time] [2021-11-12 23:42:24,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-11-12 23:42:24,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 157. [2021-11-12 23:42:24,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 108 states have (on average 1.1851851851851851) internal successors, (128), 110 states have internal predecessors, (128), 36 states have call successors, (36), 11 states have call predecessors, (36), 12 states have return successors, (40), 35 states have call predecessors, (40), 35 states have call successors, (40) [2021-11-12 23:42:24,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 204 transitions. [2021-11-12 23:42:24,032 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 204 transitions. Word has length 137 [2021-11-12 23:42:24,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:42:24,032 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 204 transitions. [2021-11-12 23:42:24,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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 23:42:24,033 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 204 transitions. [2021-11-12 23:42:24,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-12 23:42:24,035 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:42:24,035 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:42:24,094 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34e3465c-9083-4f30-9566-1a4997fe7b6e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 23:42:24,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34e3465c-9083-4f30-9566-1a4997fe7b6e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:42:24,256 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:42:24,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:42:24,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1387359161, now seen corresponding path program 1 times [2021-11-12 23:42:24,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:42:24,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1814416065] [2021-11-12 23:42:24,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:42:24,262 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:42:24,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34e3465c-9083-4f30-9566-1a4997fe7b6e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:42:24,264 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34e3465c-9083-4f30-9566-1a4997fe7b6e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:42:24,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34e3465c-9083-4f30-9566-1a4997fe7b6e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 23:42:28,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:42:28,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 1989 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:42:28,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:42:29,431 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 121 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-12 23:42:29,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:42:30,174 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2021-11-12 23:42:30,174 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:42:30,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1814416065] [2021-11-12 23:42:30,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1814416065] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:42:30,175 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:42:30,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 10 [2021-11-12 23:42:30,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880375739] [2021-11-12 23:42:30,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:42:30,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-12 23:42:30,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:42:30,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-12 23:42:30,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:42:30,177 INFO L87 Difference]: Start difference. First operand 157 states and 204 transitions. Second operand has 9 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 3 states have call successors, (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 23:42:30,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:42:30,812 INFO L93 Difference]: Finished difference Result 287 states and 378 transitions. [2021-11-12 23:42:30,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 23:42:30,813 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 3 states have call successors, (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 137 [2021-11-12 23:42:30,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:42:30,816 INFO L225 Difference]: With dead ends: 287 [2021-11-12 23:42:30,817 INFO L226 Difference]: Without dead ends: 166 [2021-11-12 23:42:30,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:42:30,820 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 12 mSDsluCounter, 1124 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 448.80ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1291 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.85ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 507.54ms IncrementalHoareTripleChecker+Time [2021-11-12 23:42:30,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 1291 Invalid, 152 Unknown, 0 Unchecked, 5.85ms Time], IncrementalHoareTripleChecker [3 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 507.54ms Time] [2021-11-12 23:42:30,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-11-12 23:42:30,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 157. [2021-11-12 23:42:30,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 108 states have (on average 1.1851851851851851) internal successors, (128), 110 states have internal predecessors, (128), 36 states have call successors, (36), 11 states have call predecessors, (36), 12 states have return successors, (40), 35 states have call predecessors, (40), 35 states have call successors, (40) [2021-11-12 23:42:30,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 204 transitions. [2021-11-12 23:42:30,849 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 204 transitions. Word has length 137 [2021-11-12 23:42:30,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:42:30,850 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 204 transitions. [2021-11-12 23:42:30,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 3 states have call successors, (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 23:42:30,851 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 204 transitions. [2021-11-12 23:42:30,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-12 23:42:30,854 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:42:30,854 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:42:30,922 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34e3465c-9083-4f30-9566-1a4997fe7b6e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 23:42:31,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34e3465c-9083-4f30-9566-1a4997fe7b6e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:42:31,082 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:42:31,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:42:31,082 INFO L85 PathProgramCache]: Analyzing trace with hash 398358078, now seen corresponding path program 1 times [2021-11-12 23:42:31,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:42:31,088 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1069700243] [2021-11-12 23:42:31,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:42:31,088 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:42:31,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34e3465c-9083-4f30-9566-1a4997fe7b6e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:42:31,090 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34e3465c-9083-4f30-9566-1a4997fe7b6e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:42:31,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34e3465c-9083-4f30-9566-1a4997fe7b6e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 23:42:35,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:42:36,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 1993 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:42:36,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:42:36,604 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 110 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-11-12 23:42:36,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:42:37,269 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-11-12 23:42:37,269 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:42:37,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1069700243] [2021-11-12 23:42:37,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1069700243] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:42:37,270 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:42:37,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2021-11-12 23:42:37,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671880547] [2021-11-12 23:42:37,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:42:37,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:42:37,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:42:37,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:42:37,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:42:37,272 INFO L87 Difference]: Start difference. First operand 157 states and 204 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 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 23:42:37,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:42:37,673 INFO L93 Difference]: Finished difference Result 262 states and 340 transitions. [2021-11-12 23:42:37,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:42:37,674 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 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 139 [2021-11-12 23:42:37,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:42:37,676 INFO L225 Difference]: With dead ends: 262 [2021-11-12 23:42:37,677 INFO L226 Difference]: Without dead ends: 154 [2021-11-12 23:42:37,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 272 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 23:42:37,678 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 81 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 311.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 570 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.23ms SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 353.43ms IncrementalHoareTripleChecker+Time [2021-11-12 23:42:37,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 570 Invalid, 72 Unknown, 0 Unchecked, 3.23ms Time], IncrementalHoareTripleChecker [37 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 353.43ms Time] [2021-11-12 23:42:37,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-11-12 23:42:37,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2021-11-12 23:42:37,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 106 states have (on average 1.179245283018868) internal successors, (125), 107 states have internal predecessors, (125), 36 states have call successors, (36), 11 states have call predecessors, (36), 11 states have return successors, (38), 35 states have call predecessors, (38), 35 states have call successors, (38) [2021-11-12 23:42:37,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 199 transitions. [2021-11-12 23:42:37,692 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 199 transitions. Word has length 139 [2021-11-12 23:42:37,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:42:37,692 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 199 transitions. [2021-11-12 23:42:37,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 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 23:42:37,693 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 199 transitions. [2021-11-12 23:42:37,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-12 23:42:37,700 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:42:37,701 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:42:37,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34e3465c-9083-4f30-9566-1a4997fe7b6e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 23:42:37,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34e3465c-9083-4f30-9566-1a4997fe7b6e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:42:37,926 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:42:37,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:42:37,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1494805612, now seen corresponding path program 1 times [2021-11-12 23:42:37,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:42:37,931 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1381970863] [2021-11-12 23:42:37,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:42:37,931 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:42:37,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34e3465c-9083-4f30-9566-1a4997fe7b6e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:42:37,932 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34e3465c-9083-4f30-9566-1a4997fe7b6e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:42:37,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34e3465c-9083-4f30-9566-1a4997fe7b6e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 23:42:42,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:42:42,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 2019 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-12 23:42:42,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:42:46,048 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 141 proven. 8 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-12 23:42:46,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:43:01,894 WARN L227 SmtUtils]: Spent 11.25s on a formula simplification. DAG size of input: 526 DAG size of output: 272 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-12 23:43:01,900 INFO L354 Elim1Store]: treesize reduction 897, result has 45.1 percent of original size [2021-11-12 23:43:01,901 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 132 treesize of output 771 [2021-11-12 23:52:56,099 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2021-11-12 23:52:56,099 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:52:56,099 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1381970863] [2021-11-12 23:52:56,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1381970863] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:52:56,099 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [112676195] [2021-11-12 23:52:56,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:52:56,100 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:52:56,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34e3465c-9083-4f30-9566-1a4997fe7b6e/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:52:56,102 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34e3465c-9083-4f30-9566-1a4997fe7b6e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:52:56,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34e3465c-9083-4f30-9566-1a4997fe7b6e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-12 23:53:00,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:53:01,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 2019 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-12 23:53:01,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:53:01,985 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 23:53:06,990 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 150 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-12 23:53:06,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:53:10,934 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 23:53:11,768 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2021-11-12 23:53:11,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [112676195] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:53:11,768 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:53:11,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [13, 11, 12] total 41 [2021-11-12 23:53:11,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409279763] [2021-11-12 23:53:11,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:53:11,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-12 23:53:11,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:53:11,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-12 23:53:11,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1501, Unknown=0, NotChecked=0, Total=1640 [2021-11-12 23:53:11,772 INFO L87 Difference]: Start difference. First operand 154 states and 199 transitions. Second operand has 15 states, 13 states have (on average 6.538461538461538) internal successors, (85), 14 states have internal predecessors, (85), 7 states have call successors, (20), 4 states have call predecessors, (20), 6 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) [2021-11-12 23:53:14,073 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.30s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:53:17,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:53:17,898 INFO L93 Difference]: Finished difference Result 360 states and 478 transitions. [2021-11-12 23:53:17,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-12 23:53:17,899 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 6.538461538461538) internal successors, (85), 14 states have internal predecessors, (85), 7 states have call successors, (20), 4 states have call predecessors, (20), 6 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) Word has length 151 [2021-11-12 23:53:17,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:53:17,902 INFO L225 Difference]: With dead ends: 360 [2021-11-12 23:53:17,903 INFO L226 Difference]: Without dead ends: 254 [2021-11-12 23:53:17,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 611 GetRequests, 556 SyntacticMatches, 8 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 723 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=206, Invalid=2146, Unknown=0, NotChecked=0, Total=2352 [2021-11-12 23:53:17,906 INFO L933 BasicCegarLoop]: 263 mSDtfsCounter, 120 mSDsluCounter, 896 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 44 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3989.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 1159 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.61ms SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 277 IncrementalHoareTripleChecker+Unchecked, 4277.62ms IncrementalHoareTripleChecker+Time [2021-11-12 23:53:17,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 1159 Invalid, 688 Unknown, 0 Unchecked, 12.61ms Time], IncrementalHoareTripleChecker [44 Valid, 366 Invalid, 1 Unknown, 277 Unchecked, 4277.62ms Time] [2021-11-12 23:53:17,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-11-12 23:53:17,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 198. [2021-11-12 23:53:17,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 142 states have (on average 1.176056338028169) internal successors, (167), 145 states have internal predecessors, (167), 40 states have call successors, (40), 13 states have call predecessors, (40), 15 states have return successors, (49), 39 states have call predecessors, (49), 39 states have call successors, (49) [2021-11-12 23:53:17,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 256 transitions. [2021-11-12 23:53:17,925 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 256 transitions. Word has length 151 [2021-11-12 23:53:17,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:53:17,926 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 256 transitions. [2021-11-12 23:53:17,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 6.538461538461538) internal successors, (85), 14 states have internal predecessors, (85), 7 states have call successors, (20), 4 states have call predecessors, (20), 6 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) [2021-11-12 23:53:17,927 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 256 transitions. [2021-11-12 23:53:17,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-12 23:53:17,930 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:53:17,930 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:53:17,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34e3465c-9083-4f30-9566-1a4997fe7b6e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 23:53:18,166 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34e3465c-9083-4f30-9566-1a4997fe7b6e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (12)] Ended with exit code 0 [2021-11-12 23:53:18,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34e3465c-9083-4f30-9566-1a4997fe7b6e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34e3465c-9083-4f30-9566-1a4997fe7b6e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:53:18,354 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:53:18,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:53:18,355 INFO L85 PathProgramCache]: Analyzing trace with hash 381677206, now seen corresponding path program 1 times [2021-11-12 23:53:18,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:53:18,358 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1110251542] [2021-11-12 23:53:18,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:53:18,358 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:53:18,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34e3465c-9083-4f30-9566-1a4997fe7b6e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:53:18,360 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34e3465c-9083-4f30-9566-1a4997fe7b6e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:53:18,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34e3465c-9083-4f30-9566-1a4997fe7b6e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 23:53:22,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:53:23,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 2022 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-12 23:53:23,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:53:23,437 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 23:53:25,632 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 115 treesize of output 107 [2021-11-12 23:53:25,643 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:53:25,643 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 104 treesize of output 40 [2021-11-12 23:53:26,407 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-11-12 23:53:26,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:53:30,393 INFO L354 Elim1Store]: treesize reduction 322, result has 0.3 percent of original size [2021-11-12 23:53:30,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 138 treesize of output 46 [2021-11-12 23:53:31,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:53:31,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:53:31,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:53:31,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:53:31,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:53:31,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:53:31,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:53:31,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:53:31,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:53:31,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:53:31,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:53:31,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:53:31,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:53:31,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:53:31,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:53:31,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:53:31,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:53:31,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:53:31,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:53:31,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:53:31,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:53:31,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:53:31,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:53:31,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:53:31,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:53:31,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:53:31,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:53:31,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:53:43,821 WARN L227 SmtUtils]: Spent 12.20s on a formula simplification. DAG size of input: 411 DAG size of output: 269 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-12 23:53:43,824 INFO L354 Elim1Store]: treesize reduction 515, result has 58.8 percent of original size [2021-11-12 23:53:43,825 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 92 case distinctions, treesize of input 127 treesize of output 770