./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_array_eq_ignore_case_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_array_eq_ignore_case_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 8de283a79f01a407383b7daa040c59e7c5c73f52f0f9c705f7021a208716cd24 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 15:01:15,099 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 15:01:15,101 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 15:01:15,131 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 15:01:15,132 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 15:01:15,133 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 15:01:15,135 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 15:01:15,137 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 15:01:15,139 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 15:01:15,141 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 15:01:15,142 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 15:01:15,143 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 15:01:15,144 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 15:01:15,145 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 15:01:15,147 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 15:01:15,149 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 15:01:15,150 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 15:01:15,151 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 15:01:15,154 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 15:01:15,156 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 15:01:15,158 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 15:01:15,160 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 15:01:15,162 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 15:01:15,163 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 15:01:15,167 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 15:01:15,167 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 15:01:15,168 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 15:01:15,169 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 15:01:15,169 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 15:01:15,171 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 15:01:15,171 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 15:01:15,172 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 15:01:15,173 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 15:01:15,174 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 15:01:15,175 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 15:01:15,176 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 15:01:15,177 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 15:01:15,177 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 15:01:15,178 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 15:01:15,179 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 15:01:15,180 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 15:01:15,181 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-19 15:01:15,206 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 15:01:15,206 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 15:01:15,207 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 15:01:15,208 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 15:01:15,208 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 15:01:15,208 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 15:01:15,209 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 15:01:15,209 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 15:01:15,209 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 15:01:15,210 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 15:01:15,210 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 15:01:15,211 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 15:01:15,211 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 15:01:15,211 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 15:01:15,212 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 15:01:15,212 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 15:01:15,213 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 15:01:15,213 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 15:01:15,214 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 15:01:15,214 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 15:01:15,215 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 15:01:15,215 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 15:01:15,215 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 15:01:15,216 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 15:01:15,216 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 15:01:15,216 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 15:01:15,217 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 15:01:15,217 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 15:01:15,217 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 15:01:15,218 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 15:01:15,218 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 15:01:15,218 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 15:01:15,218 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 15:01:15,218 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 15:01:15,219 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 15:01:15,219 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 15:01:15,219 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 15:01:15,219 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_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8de283a79f01a407383b7daa040c59e7c5c73f52f0f9c705f7021a208716cd24 [2021-11-19 15:01:15,445 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 15:01:15,469 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 15:01:15,472 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 15:01:15,473 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 15:01:15,474 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 15:01:15,476 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/aws-c-common/aws_array_eq_ignore_case_harness.i [2021-11-19 15:01:15,567 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/data/64b3927af/74b7d4bd197f45a09df747bd2e191887/FLAG594901acb [2021-11-19 15:01:16,590 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 15:01:16,591 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/sv-benchmarks/c/aws-c-common/aws_array_eq_ignore_case_harness.i [2021-11-19 15:01:16,625 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/data/64b3927af/74b7d4bd197f45a09df747bd2e191887/FLAG594901acb [2021-11-19 15:01:16,997 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/data/64b3927af/74b7d4bd197f45a09df747bd2e191887 [2021-11-19 15:01:16,999 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 15:01:17,001 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 15:01:17,003 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 15:01:17,003 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 15:01:17,006 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 15:01:17,007 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:01:16" (1/1) ... [2021-11-19 15:01:17,008 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bc80c62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:01:17, skipping insertion in model container [2021-11-19 15:01:17,009 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:01:16" (1/1) ... [2021-11-19 15:01:17,016 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 15:01:17,146 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 15:01:17,463 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/sv-benchmarks/c/aws-c-common/aws_array_eq_ignore_case_harness.i[4498,4511] [2021-11-19 15:01:17,470 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/sv-benchmarks/c/aws-c-common/aws_array_eq_ignore_case_harness.i[4558,4571] [2021-11-19 15:01:17,496 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-19 15:01:17,502 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-19 15:01:18,438 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:01:18,438 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:01:18,439 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:01:18,440 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:01:18,441 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:01:18,456 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:01:18,457 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:01:18,459 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:01:18,460 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:01:18,909 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-19 15:01:18,911 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-19 15:01:18,912 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-19 15:01:18,913 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-19 15:01:18,915 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-19 15:01:18,916 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-19 15:01:18,917 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-19 15:01:18,918 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-19 15:01:18,918 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-19 15:01:18,919 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-19 15:01:19,116 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-19 15:01:19,216 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:01:19,217 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:01:19,292 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:01:19,349 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-19 15:01:19,349 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@ac90298 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:01:19, skipping insertion in model container [2021-11-19 15:01:19,350 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 15:01:19,350 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 15:01:19,352 INFO L158 Benchmark]: Toolchain (without parser) took 2349.95ms. Allocated memory is still 125.8MB. Free memory was 83.0MB in the beginning and 46.5MB in the end (delta: 36.5MB). Peak memory consumption was 38.2MB. Max. memory is 16.1GB. [2021-11-19 15:01:19,353 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 81.8MB. Free memory was 38.5MB in the beginning and 38.5MB in the end (delta: 41.1kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 15:01:19,354 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2347.14ms. Allocated memory is still 125.8MB. Free memory was 82.8MB in the beginning and 46.5MB in the end (delta: 36.3MB). Peak memory consumption was 38.2MB. Max. memory is 16.1GB. [2021-11-19 15:01:19,368 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 81.8MB. Free memory was 38.5MB in the beginning and 38.5MB in the end (delta: 41.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2347.14ms. Allocated memory is still 125.8MB. Free memory was 82.8MB in the beginning and 46.5MB in the end (delta: 36.3MB). Peak memory consumption was 38.2MB. 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_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_array_eq_ignore_case_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 8de283a79f01a407383b7daa040c59e7c5c73f52f0f9c705f7021a208716cd24 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 15:01:21,624 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 15:01:21,626 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 15:01:21,682 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 15:01:21,683 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 15:01:21,687 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 15:01:21,689 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 15:01:21,694 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 15:01:21,697 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 15:01:21,705 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 15:01:21,706 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 15:01:21,708 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 15:01:21,709 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 15:01:21,712 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 15:01:21,714 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 15:01:21,718 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 15:01:21,720 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 15:01:21,721 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 15:01:21,723 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 15:01:21,730 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 15:01:21,733 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 15:01:21,734 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 15:01:21,737 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 15:01:21,739 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 15:01:21,747 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 15:01:21,748 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 15:01:21,748 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 15:01:21,750 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 15:01:21,751 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 15:01:21,752 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 15:01:21,752 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 15:01:21,753 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 15:01:21,755 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 15:01:21,756 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 15:01:21,757 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 15:01:21,758 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 15:01:21,759 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 15:01:21,759 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 15:01:21,759 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 15:01:21,761 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 15:01:21,762 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 15:01:21,767 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-19 15:01:21,811 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 15:01:21,811 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 15:01:21,813 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 15:01:21,813 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 15:01:21,813 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 15:01:21,814 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 15:01:21,814 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 15:01:21,814 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 15:01:21,814 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 15:01:21,814 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 15:01:21,817 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 15:01:21,817 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 15:01:21,817 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 15:01:21,818 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 15:01:21,818 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 15:01:21,818 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 15:01:21,818 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 15:01:21,818 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 15:01:21,819 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 15:01:21,819 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 15:01:21,819 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 15:01:21,819 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 15:01:21,820 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 15:01:21,820 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 15:01:21,820 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 15:01:21,820 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 15:01:21,821 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 15:01:21,821 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 15:01:21,821 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 15:01:21,821 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 15:01:21,821 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 15:01:21,822 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 15:01:21,822 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 15:01:21,822 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8de283a79f01a407383b7daa040c59e7c5c73f52f0f9c705f7021a208716cd24 [2021-11-19 15:01:22,235 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 15:01:22,255 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 15:01:22,257 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 15:01:22,259 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 15:01:22,259 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 15:01:22,261 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/aws-c-common/aws_array_eq_ignore_case_harness.i [2021-11-19 15:01:22,328 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/data/6341ea09d/8693fd40270c4853812ceac984d2564d/FLAG92ace3a0c [2021-11-19 15:01:23,205 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 15:01:23,206 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/sv-benchmarks/c/aws-c-common/aws_array_eq_ignore_case_harness.i [2021-11-19 15:01:23,270 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/data/6341ea09d/8693fd40270c4853812ceac984d2564d/FLAG92ace3a0c [2021-11-19 15:01:23,711 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/data/6341ea09d/8693fd40270c4853812ceac984d2564d [2021-11-19 15:01:23,713 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 15:01:23,715 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 15:01:23,718 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 15:01:23,718 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 15:01:23,721 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 15:01:23,722 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:01:23" (1/1) ... [2021-11-19 15:01:23,722 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72c2c58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:01:23, skipping insertion in model container [2021-11-19 15:01:23,723 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:01:23" (1/1) ... [2021-11-19 15:01:23,729 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 15:01:23,887 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 15:01:24,252 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/sv-benchmarks/c/aws-c-common/aws_array_eq_ignore_case_harness.i[4498,4511] [2021-11-19 15:01:24,264 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/sv-benchmarks/c/aws-c-common/aws_array_eq_ignore_case_harness.i[4558,4571] [2021-11-19 15:01:24,289 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-19 15:01:24,296 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-19 15:01:25,199 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:01:25,200 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:01:25,201 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:01:25,202 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:01:25,203 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:01:25,220 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:01:25,221 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:01:25,223 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:01:25,224 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:01:25,729 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-19 15:01:25,730 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-19 15:01:25,731 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-19 15:01:25,733 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-19 15:01:25,734 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-19 15:01:25,735 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-19 15:01:25,736 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-19 15:01:25,737 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-19 15:01:25,737 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-19 15:01:25,738 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-19 15:01:25,991 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-19 15:01:26,147 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:01:26,148 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:01:26,225 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:01:26,302 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 15:01:26,367 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 15:01:26,371 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/sv-benchmarks/c/aws-c-common/aws_array_eq_ignore_case_harness.i[4498,4511] [2021-11-19 15:01:26,372 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/sv-benchmarks/c/aws-c-common/aws_array_eq_ignore_case_harness.i[4558,4571] [2021-11-19 15:01:26,373 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-19 15:01:26,374 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-19 15:01:26,404 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:01:26,404 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:01:26,404 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:01:26,405 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:01:26,406 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:01:26,411 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:01:26,412 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:01:26,413 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:01:26,413 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:01:26,444 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-19 15:01:26,445 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-19 15:01:26,446 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-19 15:01:26,446 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-19 15:01:26,447 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-19 15:01:26,448 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-19 15:01:26,448 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-19 15:01:26,449 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-19 15:01:26,449 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-19 15:01:26,449 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-19 15:01:26,468 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-19 15:01:26,545 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:01:26,546 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:01:26,572 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:01:26,600 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 15:01:26,627 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/sv-benchmarks/c/aws-c-common/aws_array_eq_ignore_case_harness.i[4498,4511] [2021-11-19 15:01:26,633 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/sv-benchmarks/c/aws-c-common/aws_array_eq_ignore_case_harness.i[4558,4571] [2021-11-19 15:01:26,634 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-19 15:01:26,635 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-19 15:01:26,681 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:01:26,681 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:01:26,682 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:01:26,682 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:01:26,683 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:01:26,689 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:01:26,689 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:01:26,690 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:01:26,690 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:01:26,747 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-19 15:01:26,748 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-19 15:01:26,748 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-19 15:01:26,750 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-19 15:01:26,750 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-19 15:01:26,751 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-19 15:01:26,751 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-19 15:01:26,752 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-19 15:01:26,752 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-19 15:01:26,753 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-19 15:01:26,777 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-19 15:01:26,849 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:01:26,850 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:01:26,885 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:01:27,295 INFO L208 MainTranslator]: Completed translation [2021-11-19 15:01:27,295 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:01:27 WrapperNode [2021-11-19 15:01:27,296 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 15:01:27,297 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 15:01:27,297 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 15:01:27,298 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 15:01:27,308 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:01:27" (1/1) ... [2021-11-19 15:01:27,455 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:01:27" (1/1) ... [2021-11-19 15:01:27,552 INFO L137 Inliner]: procedures = 713, calls = 2617, calls flagged for inlining = 58, calls inlined = 4, statements flattened = 771 [2021-11-19 15:01:27,552 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 15:01:27,553 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 15:01:27,553 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 15:01:27,553 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 15:01:27,562 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:01:27" (1/1) ... [2021-11-19 15:01:27,562 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:01:27" (1/1) ... [2021-11-19 15:01:27,572 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:01:27" (1/1) ... [2021-11-19 15:01:27,573 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:01:27" (1/1) ... [2021-11-19 15:01:27,612 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:01:27" (1/1) ... [2021-11-19 15:01:27,616 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:01:27" (1/1) ... [2021-11-19 15:01:27,629 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:01:27" (1/1) ... [2021-11-19 15:01:27,657 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 15:01:27,659 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 15:01:27,660 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 15:01:27,660 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 15:01:27,661 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:01:27" (1/1) ... [2021-11-19 15:01:27,668 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 15:01:27,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:01:27,692 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 15:01:27,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 15:01:27,743 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_eq_ignore_case [2021-11-19 15:01:27,744 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_eq_ignore_case [2021-11-19 15:01:27,744 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 15:01:27,744 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-11-19 15:01:27,744 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-11-19 15:01:27,744 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 15:01:27,744 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-19 15:01:27,746 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-19 15:01:27,746 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-19 15:01:27,746 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-19 15:01:27,746 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 15:01:27,747 INFO L130 BoogieDeclarations]: Found specification of procedure save_byte_from_array [2021-11-19 15:01:27,747 INFO L138 BoogieDeclarations]: Found implementation of procedure save_byte_from_array [2021-11-19 15:01:27,747 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 15:01:27,747 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 15:01:27,747 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-19 15:01:27,748 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-19 15:01:27,748 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-19 15:01:27,748 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2021-11-19 15:01:27,748 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2021-11-19 15:01:27,748 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-19 15:01:27,748 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_malloc [2021-11-19 15:01:27,748 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_malloc [2021-11-19 15:01:27,749 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-19 15:01:27,749 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-19 15:01:27,749 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 15:01:27,749 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-19 15:01:27,749 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-19 15:01:27,749 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-19 15:01:28,040 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 15:01:28,057 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 15:01:31,660 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 15:01:31,671 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 15:01:31,671 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 15:01:31,673 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 03:01:31 BoogieIcfgContainer [2021-11-19 15:01:31,674 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 15:01:31,676 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 15:01:31,677 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 15:01:31,682 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 15:01:31,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 03:01:23" (1/3) ... [2021-11-19 15:01:31,683 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23fa4224 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 03:01:31, skipping insertion in model container [2021-11-19 15:01:31,683 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:01:27" (2/3) ... [2021-11-19 15:01:31,685 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23fa4224 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 03:01:31, skipping insertion in model container [2021-11-19 15:01:31,686 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 03:01:31" (3/3) ... [2021-11-19 15:01:31,687 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_array_eq_ignore_case_harness.i [2021-11-19 15:01:31,693 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 15:01:31,693 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 15:01:31,751 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 15:01:31,758 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 15:01:31,758 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 15:01:31,774 INFO L276 IsEmpty]: Start isEmpty. Operand has 77 states, 47 states have (on average 1.297872340425532) internal successors, (61), 51 states have internal predecessors, (61), 20 states have call successors, (20), 8 states have call predecessors, (20), 8 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-11-19 15:01:31,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-19 15:01:31,783 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:01:31,784 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-11-19 15:01:31,784 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:01:31,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:01:31,789 INFO L85 PathProgramCache]: Analyzing trace with hash 106347311, now seen corresponding path program 1 times [2021-11-19 15:01:31,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:01:31,806 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1068819461] [2021-11-19 15:01:31,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:01:31,807 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:01:31,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:01:31,810 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:01:31,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 15:01:32,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:01:32,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 1404 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-19 15:01:32,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:01:32,878 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-19 15:01:32,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:01:33,058 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-19 15:01:33,059 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:01:33,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1068819461] [2021-11-19 15:01:33,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1068819461] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:01:33,060 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:01:33,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-19 15:01:33,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048478719] [2021-11-19 15:01:33,062 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:01:33,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 15:01:33,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:01:33,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 15:01:33,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 15:01:33,094 INFO L87 Difference]: Start difference. First operand has 77 states, 47 states have (on average 1.297872340425532) internal successors, (61), 51 states have internal predecessors, (61), 20 states have call successors, (20), 8 states have call predecessors, (20), 8 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Second operand has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2021-11-19 15:01:33,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:01:33,123 INFO L93 Difference]: Finished difference Result 151 states and 216 transitions. [2021-11-19 15:01:33,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 15:01:33,125 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) Word has length 65 [2021-11-19 15:01:33,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:01:33,134 INFO L225 Difference]: With dead ends: 151 [2021-11-19 15:01:33,134 INFO L226 Difference]: Without dead ends: 72 [2021-11-19 15:01:33,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 15:01:33,141 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 15:01:33,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 15:01:33,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-19 15:01:33,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-11-19 15:01:33,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 43 states have (on average 1.2325581395348837) internal successors, (53), 46 states have internal predecessors, (53), 20 states have call successors, (20), 8 states have call predecessors, (20), 8 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-11-19 15:01:33,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 92 transitions. [2021-11-19 15:01:33,190 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 92 transitions. Word has length 65 [2021-11-19 15:01:33,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:01:33,190 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 92 transitions. [2021-11-19 15:01:33,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2021-11-19 15:01:33,191 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 92 transitions. [2021-11-19 15:01:33,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-19 15:01:33,196 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:01:33,197 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-11-19 15:01:33,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 15:01:33,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:01:33,424 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:01:33,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:01:33,425 INFO L85 PathProgramCache]: Analyzing trace with hash -566993231, now seen corresponding path program 1 times [2021-11-19 15:01:33,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:01:33,428 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1243973794] [2021-11-19 15:01:33,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:01:33,429 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:01:33,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:01:33,430 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:01:33,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 15:01:34,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:01:34,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 1404 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-19 15:01:34,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:01:34,812 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-19 15:01:34,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:01:35,467 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-19 15:01:35,467 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:01:35,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1243973794] [2021-11-19 15:01:35,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1243973794] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:01:35,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [537345743] [2021-11-19 15:01:35,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:01:35,468 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:01:35,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:01:35,474 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:01:35,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2021-11-19 15:01:36,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:01:36,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 1404 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 15:01:36,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:01:36,289 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-19 15:01:36,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:01:36,549 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-19 15:01:36,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [537345743] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:01:36,550 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 15:01:36,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [13, 8] total 17 [2021-11-19 15:01:36,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622924878] [2021-11-19 15:01:36,551 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:01:36,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 15:01:36,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:01:36,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 15:01:36,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-11-19 15:01:36,553 INFO L87 Difference]: Start difference. First operand 72 states and 92 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-19 15:01:36,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:01:36,686 INFO L93 Difference]: Finished difference Result 105 states and 139 transitions. [2021-11-19 15:01:36,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 15:01:36,687 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 65 [2021-11-19 15:01:36,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:01:36,691 INFO L225 Difference]: With dead ends: 105 [2021-11-19 15:01:36,691 INFO L226 Difference]: Without dead ends: 87 [2021-11-19 15:01:36,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-11-19 15:01:36,693 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 15 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:01:36,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 338 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:01:36,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-11-19 15:01:36,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 81. [2021-11-19 15:01:36,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 46 states have (on average 1.2173913043478262) internal successors, (56), 51 states have internal predecessors, (56), 25 states have call successors, (25), 8 states have call predecessors, (25), 9 states have return successors, (25), 23 states have call predecessors, (25), 24 states have call successors, (25) [2021-11-19 15:01:36,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 106 transitions. [2021-11-19 15:01:36,711 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 106 transitions. Word has length 65 [2021-11-19 15:01:36,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:01:36,712 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 106 transitions. [2021-11-19 15:01:36,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-19 15:01:36,712 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 106 transitions. [2021-11-19 15:01:36,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-19 15:01:36,715 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:01:36,716 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-11-19 15:01:36,731 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (4)] Ended with exit code 0 [2021-11-19 15:01:36,939 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-19 15:01:37,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:01:37,120 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:01:37,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:01:37,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1579169156, now seen corresponding path program 1 times [2021-11-19 15:01:37,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:01:37,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2114716384] [2021-11-19 15:01:37,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:01:37,137 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:01:37,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:01:37,138 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:01:37,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 15:01:37,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:01:37,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 1410 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 15:01:37,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:01:37,944 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-19 15:01:37,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:01:38,140 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-19 15:01:38,141 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:01:38,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2114716384] [2021-11-19 15:01:38,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2114716384] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:01:38,141 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:01:38,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-11-19 15:01:38,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970846103] [2021-11-19 15:01:38,141 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:01:38,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 15:01:38,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:01:38,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 15:01:38,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 15:01:38,142 INFO L87 Difference]: Start difference. First operand 81 states and 106 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 15:01:38,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:01:38,217 INFO L93 Difference]: Finished difference Result 93 states and 121 transitions. [2021-11-19 15:01:38,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:01:38,218 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 67 [2021-11-19 15:01:38,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:01:38,227 INFO L225 Difference]: With dead ends: 93 [2021-11-19 15:01:38,227 INFO L226 Difference]: Without dead ends: 91 [2021-11-19 15:01:38,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-19 15:01:38,231 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 12 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 15:01:38,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 453 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 15:01:38,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-11-19 15:01:38,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 87. [2021-11-19 15:01:38,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 50 states have (on average 1.22) internal successors, (61), 55 states have internal predecessors, (61), 26 states have call successors, (26), 9 states have call predecessors, (26), 10 states have return successors, (26), 24 states have call predecessors, (26), 25 states have call successors, (26) [2021-11-19 15:01:38,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 113 transitions. [2021-11-19 15:01:38,251 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 113 transitions. Word has length 67 [2021-11-19 15:01:38,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:01:38,251 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 113 transitions. [2021-11-19 15:01:38,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 15:01:38,251 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 113 transitions. [2021-11-19 15:01:38,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-19 15:01:38,255 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:01:38,255 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-11-19 15:01:38,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 15:01:38,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:01:38,460 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:01:38,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:01:38,460 INFO L85 PathProgramCache]: Analyzing trace with hash -2051455754, now seen corresponding path program 1 times [2021-11-19 15:01:38,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:01:38,463 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [420195681] [2021-11-19 15:01:38,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:01:38,463 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:01:38,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:01:38,464 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:01:38,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 15:01:39,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:01:39,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 1426 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 15:01:39,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:01:39,225 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-19 15:01:39,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:01:39,406 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-19 15:01:39,407 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:01:39,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [420195681] [2021-11-19 15:01:39,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [420195681] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:01:39,407 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:01:39,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 15:01:39,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383973136] [2021-11-19 15:01:39,408 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:01:39,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 15:01:39,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:01:39,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 15:01:39,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 15:01:39,410 INFO L87 Difference]: Start difference. First operand 87 states and 113 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 1 states have call successors, (12) [2021-11-19 15:01:39,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:01:39,433 INFO L93 Difference]: Finished difference Result 107 states and 138 transitions. [2021-11-19 15:01:39,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 15:01:39,433 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 1 states have call successors, (12) Word has length 71 [2021-11-19 15:01:39,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:01:39,436 INFO L225 Difference]: With dead ends: 107 [2021-11-19 15:01:39,436 INFO L226 Difference]: Without dead ends: 91 [2021-11-19 15:01:39,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 15:01:39,438 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 0 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 15:01:39,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 448 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 15:01:39,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-11-19 15:01:39,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2021-11-19 15:01:39,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 57 states have internal predecessors, (64), 26 states have call successors, (26), 9 states have call predecessors, (26), 11 states have return successors, (28), 26 states have call predecessors, (28), 25 states have call successors, (28) [2021-11-19 15:01:39,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 118 transitions. [2021-11-19 15:01:39,451 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 118 transitions. Word has length 71 [2021-11-19 15:01:39,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:01:39,452 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 118 transitions. [2021-11-19 15:01:39,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 1 states have call successors, (12) [2021-11-19 15:01:39,452 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 118 transitions. [2021-11-19 15:01:39,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-19 15:01:39,456 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:01:39,456 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-11-19 15:01:39,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 15:01:39,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:01:39,680 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:01:39,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:01:39,680 INFO L85 PathProgramCache]: Analyzing trace with hash 753126495, now seen corresponding path program 1 times [2021-11-19 15:01:39,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:01:39,682 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1942391150] [2021-11-19 15:01:39,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:01:39,682 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:01:39,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:01:39,683 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:01:39,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 15:01:40,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:01:40,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 1431 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 15:01:40,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:01:40,733 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-19 15:01:40,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:01:41,351 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-19 15:01:41,352 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:01:41,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1942391150] [2021-11-19 15:01:41,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1942391150] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:01:41,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [714407760] [2021-11-19 15:01:41,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:01:41,353 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:01:41,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:01:41,356 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:01:41,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-19 15:01:45,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:01:45,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 1431 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-19 15:01:45,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:01:45,756 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-19 15:01:45,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:01:46,060 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-19 15:01:46,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [714407760] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:01:46,060 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 15:01:46,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [12, 11] total 20 [2021-11-19 15:01:46,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603867530] [2021-11-19 15:01:46,061 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:01:46,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 15:01:46,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:01:46,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 15:01:46,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-11-19 15:01:46,063 INFO L87 Difference]: Start difference. First operand 91 states and 118 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 6 states have internal predecessors, (30), 3 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 15:01:46,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:01:46,203 INFO L93 Difference]: Finished difference Result 142 states and 195 transitions. [2021-11-19 15:01:46,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 15:01:46,204 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 6 states have internal predecessors, (30), 3 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) Word has length 71 [2021-11-19 15:01:46,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:01:46,206 INFO L225 Difference]: With dead ends: 142 [2021-11-19 15:01:46,207 INFO L226 Difference]: Without dead ends: 128 [2021-11-19 15:01:46,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-11-19 15:01:46,208 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 10 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:01:46,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 657 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:01:46,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-11-19 15:01:46,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 126. [2021-11-19 15:01:46,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 70 states have (on average 1.2142857142857142) internal successors, (85), 75 states have internal predecessors, (85), 42 states have call successors, (42), 10 states have call predecessors, (42), 13 states have return successors, (50), 43 states have call predecessors, (50), 41 states have call successors, (50) [2021-11-19 15:01:46,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 177 transitions. [2021-11-19 15:01:46,228 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 177 transitions. Word has length 71 [2021-11-19 15:01:46,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:01:46,229 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 177 transitions. [2021-11-19 15:01:46,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 6 states have internal predecessors, (30), 3 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 15:01:46,230 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 177 transitions. [2021-11-19 15:01:46,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-19 15:01:46,234 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:01:46,235 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2021-11-19 15:01:46,247 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-11-19 15:01:46,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 15:01:46,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:01:46,647 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:01:46,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:01:46,648 INFO L85 PathProgramCache]: Analyzing trace with hash -259725272, now seen corresponding path program 1 times [2021-11-19 15:01:46,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:01:46,650 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1591930927] [2021-11-19 15:01:46,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:01:46,650 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:01:46,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:01:46,652 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:01:46,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 15:01:47,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:01:47,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 1430 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-19 15:01:47,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:01:48,140 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-19 15:01:48,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:01:49,465 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-19 15:01:49,466 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:01:49,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1591930927] [2021-11-19 15:01:49,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1591930927] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:01:49,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1010236063] [2021-11-19 15:01:49,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:01:49,466 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:01:49,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:01:49,476 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:01:49,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-19 15:01:50,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:01:50,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 1430 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 15:01:50,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:01:50,297 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-19 15:01:50,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:01:50,471 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-19 15:01:50,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1010236063] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:01:50,471 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 15:01:50,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [16, 15] total 27 [2021-11-19 15:01:50,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007788512] [2021-11-19 15:01:50,472 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:01:50,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 15:01:50,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:01:50,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 15:01:50,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-11-19 15:01:50,474 INFO L87 Difference]: Start difference. First operand 126 states and 177 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-19 15:01:50,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:01:50,498 INFO L93 Difference]: Finished difference Result 156 states and 213 transitions. [2021-11-19 15:01:50,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 15:01:50,499 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 81 [2021-11-19 15:01:50,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:01:50,508 INFO L225 Difference]: With dead ends: 156 [2021-11-19 15:01:50,508 INFO L226 Difference]: Without dead ends: 126 [2021-11-19 15:01:50,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 295 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-11-19 15:01:50,511 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 0 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 15:01:50,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 270 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 15:01:50,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-11-19 15:01:50,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 124. [2021-11-19 15:01:50,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 68 states have (on average 1.161764705882353) internal successors, (79), 75 states have internal predecessors, (79), 42 states have call successors, (42), 10 states have call predecessors, (42), 13 states have return successors, (50), 41 states have call predecessors, (50), 41 states have call successors, (50) [2021-11-19 15:01:50,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 171 transitions. [2021-11-19 15:01:50,547 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 171 transitions. Word has length 81 [2021-11-19 15:01:50,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:01:50,547 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 171 transitions. [2021-11-19 15:01:50,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-19 15:01:50,548 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 171 transitions. [2021-11-19 15:01:50,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-19 15:01:50,550 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:01:50,551 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-11-19 15:01:50,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 15:01:50,769 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (10)] Ended with exit code 0 [2021-11-19 15:01:50,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 15:01:50,964 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:01:50,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:01:50,964 INFO L85 PathProgramCache]: Analyzing trace with hash -264867765, now seen corresponding path program 1 times [2021-11-19 15:01:50,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:01:50,966 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2086657500] [2021-11-19 15:01:50,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:01:50,966 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:01:50,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:01:50,966 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:01:50,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 15:01:51,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:01:51,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 1432 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 15:01:51,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:01:51,875 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-19 15:01:51,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:01:52,379 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-19 15:01:52,379 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:01:52,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2086657500] [2021-11-19 15:01:52,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2086657500] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:01:52,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1089013882] [2021-11-19 15:01:52,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:01:52,379 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:01:52,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:01:52,380 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:01:52,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-19 15:01:52,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:01:52,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 1432 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 15:01:52,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:01:53,053 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-19 15:01:53,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:01:53,245 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-19 15:01:53,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1089013882] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:01:53,245 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 15:01:53,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [12, 11] total 17 [2021-11-19 15:01:53,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111529836] [2021-11-19 15:01:53,245 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:01:53,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 15:01:53,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:01:53,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 15:01:53,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-11-19 15:01:53,247 INFO L87 Difference]: Start difference. First operand 124 states and 171 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-19 15:01:53,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:01:53,401 INFO L93 Difference]: Finished difference Result 156 states and 213 transitions. [2021-11-19 15:01:53,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 15:01:53,404 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) Word has length 72 [2021-11-19 15:01:53,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:01:53,406 INFO L225 Difference]: With dead ends: 156 [2021-11-19 15:01:53,406 INFO L226 Difference]: Without dead ends: 142 [2021-11-19 15:01:53,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 268 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-11-19 15:01:53,407 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 15 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:01:53,410 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 427 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:01:53,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-11-19 15:01:53,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 140. [2021-11-19 15:01:53,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 79 states have (on average 1.1518987341772151) internal successors, (91), 85 states have internal predecessors, (91), 46 states have call successors, (46), 10 states have call predecessors, (46), 14 states have return successors, (58), 49 states have call predecessors, (58), 45 states have call successors, (58) [2021-11-19 15:01:53,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 195 transitions. [2021-11-19 15:01:53,427 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 195 transitions. Word has length 72 [2021-11-19 15:01:53,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:01:53,427 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 195 transitions. [2021-11-19 15:01:53,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-19 15:01:53,428 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 195 transitions. [2021-11-19 15:01:53,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-19 15:01:53,430 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:01:53,430 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2021-11-19 15:01:53,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 15:01:53,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-11-19 15:01:53,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 15:01:53,840 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:01:53,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:01:53,840 INFO L85 PathProgramCache]: Analyzing trace with hash 510934331, now seen corresponding path program 1 times [2021-11-19 15:01:53,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:01:53,842 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1311103935] [2021-11-19 15:01:53,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:01:53,842 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:01:53,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:01:53,843 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:01:53,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 15:01:54,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:01:54,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 1436 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-19 15:01:54,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:01:55,042 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-19 15:01:55,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:01:56,201 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-19 15:01:56,201 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:01:56,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1311103935] [2021-11-19 15:01:56,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1311103935] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:01:56,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1345024522] [2021-11-19 15:01:56,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:01:56,201 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:01:56,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:01:56,202 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:01:56,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-19 15:02:00,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:02:00,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 1436 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 15:02:00,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:02:00,430 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-19 15:02:00,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:02:00,668 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-19 15:02:00,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1345024522] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:02:00,669 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 15:02:00,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [16, 15] total 29 [2021-11-19 15:02:00,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653709490] [2021-11-19 15:02:00,669 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:02:00,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 15:02:00,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:02:00,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 15:02:00,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-11-19 15:02:00,671 INFO L87 Difference]: Start difference. First operand 140 states and 195 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 8 states have internal predecessors, (32), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-19 15:02:00,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:02:00,930 INFO L93 Difference]: Finished difference Result 158 states and 218 transitions. [2021-11-19 15:02:00,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 15:02:00,931 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 8 states have internal predecessors, (32), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 83 [2021-11-19 15:02:00,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:02:00,933 INFO L225 Difference]: With dead ends: 158 [2021-11-19 15:02:00,933 INFO L226 Difference]: Without dead ends: 154 [2021-11-19 15:02:00,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 301 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2021-11-19 15:02:00,935 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 41 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 15:02:00,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 501 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 15:02:00,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-11-19 15:02:00,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 136. [2021-11-19 15:02:00,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 77 states have (on average 1.155844155844156) internal successors, (89), 82 states have internal predecessors, (89), 44 states have call successors, (44), 11 states have call predecessors, (44), 14 states have return successors, (56), 47 states have call predecessors, (56), 43 states have call successors, (56) [2021-11-19 15:02:00,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 189 transitions. [2021-11-19 15:02:00,949 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 189 transitions. Word has length 83 [2021-11-19 15:02:00,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:02:00,950 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 189 transitions. [2021-11-19 15:02:00,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 8 states have internal predecessors, (32), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-19 15:02:00,950 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 189 transitions. [2021-11-19 15:02:00,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-19 15:02:00,952 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:02:00,953 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2021-11-19 15:02:00,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-19 15:02:01,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-19 15:02:01,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 15:02:01,376 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:02:01,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:02:01,376 INFO L85 PathProgramCache]: Analyzing trace with hash -2026638528, now seen corresponding path program 1 times [2021-11-19 15:02:01,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:02:01,377 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1388179433] [2021-11-19 15:02:01,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:02:01,378 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:02:01,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:02:01,379 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:02:01,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-19 15:02:01,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:02:01,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 1453 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-19 15:02:01,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:02:02,453 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-19 15:02:02,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:02:03,301 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-19 15:02:03,301 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:02:03,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1388179433] [2021-11-19 15:02:03,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1388179433] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:02:03,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1320122529] [2021-11-19 15:02:03,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:02:03,302 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:02:03,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:02:03,320 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:02:03,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-19 15:02:07,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:02:07,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 1453 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 15:02:07,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:02:07,610 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-19 15:02:07,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:02:08,190 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-19 15:02:08,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1320122529] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:02:08,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776964536] [2021-11-19 15:02:08,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:02:08,191 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 15:02:08,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:02:08,192 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 15:02:08,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-19 15:02:08,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:02:09,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 1453 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-19 15:02:09,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:02:09,170 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-19 15:02:09,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:02:09,682 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-19 15:02:09,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776964536] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:02:09,683 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 15:02:09,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 14, 14, 12, 12] total 25 [2021-11-19 15:02:09,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773399913] [2021-11-19 15:02:09,683 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 15:02:09,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-19 15:02:09,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:02:09,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-19 15:02:09,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-11-19 15:02:09,685 INFO L87 Difference]: Start difference. First operand 136 states and 189 transitions. Second operand has 25 states, 21 states have (on average 2.761904761904762) internal successors, (58), 20 states have internal predecessors, (58), 12 states have call successors, (24), 2 states have call predecessors, (24), 6 states have return successors, (25), 13 states have call predecessors, (25), 11 states have call successors, (25) [2021-11-19 15:02:11,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:02:11,191 INFO L93 Difference]: Finished difference Result 183 states and 261 transitions. [2021-11-19 15:02:11,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-19 15:02:11,193 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 21 states have (on average 2.761904761904762) internal successors, (58), 20 states have internal predecessors, (58), 12 states have call successors, (24), 2 states have call predecessors, (24), 6 states have return successors, (25), 13 states have call predecessors, (25), 11 states have call successors, (25) Word has length 82 [2021-11-19 15:02:11,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:02:11,195 INFO L225 Difference]: With dead ends: 183 [2021-11-19 15:02:11,195 INFO L226 Difference]: Without dead ends: 160 [2021-11-19 15:02:11,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 460 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2021-11-19 15:02:11,196 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 70 mSDsluCounter, 1337 mSDsCounter, 0 mSdLazyCounter, 746 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 1435 SdHoareTripleChecker+Invalid, 796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-19 15:02:11,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 1435 Invalid, 796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 746 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-19 15:02:11,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-11-19 15:02:11,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 152. [2021-11-19 15:02:11,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 83 states have (on average 1.144578313253012) internal successors, (95), 88 states have internal predecessors, (95), 53 states have call successors, (53), 11 states have call predecessors, (53), 15 states have return successors, (76), 58 states have call predecessors, (76), 52 states have call successors, (76) [2021-11-19 15:02:11,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 224 transitions. [2021-11-19 15:02:11,231 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 224 transitions. Word has length 82 [2021-11-19 15:02:11,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:02:11,231 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 224 transitions. [2021-11-19 15:02:11,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 21 states have (on average 2.761904761904762) internal successors, (58), 20 states have internal predecessors, (58), 12 states have call successors, (24), 2 states have call predecessors, (24), 6 states have return successors, (25), 13 states have call predecessors, (25), 11 states have call successors, (25) [2021-11-19 15:02:11,232 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 224 transitions. [2021-11-19 15:02:11,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-19 15:02:11,235 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:02:11,235 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-11-19 15:02:11,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-19 15:02:11,502 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-11-19 15:02:11,667 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (16)] Ended with exit code 0 [2021-11-19 15:02:11,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 15:02:11,861 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:02:11,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:02:11,862 INFO L85 PathProgramCache]: Analyzing trace with hash 701182204, now seen corresponding path program 1 times [2021-11-19 15:02:11,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:02:11,863 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [771241888] [2021-11-19 15:02:11,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:02:11,863 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:02:11,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:02:11,864 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:02:11,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-19 15:02:12,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:02:12,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 1434 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-19 15:02:12,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:02:12,724 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-19 15:02:12,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:02:13,164 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-19 15:02:13,165 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:02:13,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [771241888] [2021-11-19 15:02:13,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [771241888] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:02:13,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [37183277] [2021-11-19 15:02:13,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:02:13,165 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:02:13,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:02:13,176 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:02:13,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-19 15:02:13,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:02:13,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 1434 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 15:02:13,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:02:13,794 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-19 15:02:13,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:02:13,996 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-19 15:02:13,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [37183277] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:02:13,996 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 15:02:13,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [11, 10] total 17 [2021-11-19 15:02:13,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976327285] [2021-11-19 15:02:13,996 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:02:13,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 15:02:13,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:02:13,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 15:02:13,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-11-19 15:02:13,998 INFO L87 Difference]: Start difference. First operand 152 states and 224 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 4 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-19 15:02:14,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:02:14,090 INFO L93 Difference]: Finished difference Result 189 states and 270 transitions. [2021-11-19 15:02:14,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 15:02:14,091 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 4 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 77 [2021-11-19 15:02:14,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:02:14,093 INFO L225 Difference]: With dead ends: 189 [2021-11-19 15:02:14,093 INFO L226 Difference]: Without dead ends: 167 [2021-11-19 15:02:14,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 286 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-11-19 15:02:14,094 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 5 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:02:14,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 352 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:02:14,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-11-19 15:02:14,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 147. [2021-11-19 15:02:14,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 82 states have (on average 1.146341463414634) internal successors, (94), 87 states have internal predecessors, (94), 49 states have call successors, (49), 11 states have call predecessors, (49), 15 states have return successors, (70), 54 states have call predecessors, (70), 48 states have call successors, (70) [2021-11-19 15:02:14,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 213 transitions. [2021-11-19 15:02:14,111 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 213 transitions. Word has length 77 [2021-11-19 15:02:14,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:02:14,111 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 213 transitions. [2021-11-19 15:02:14,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 4 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-19 15:02:14,112 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 213 transitions. [2021-11-19 15:02:14,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-19 15:02:14,114 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:02:14,114 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-11-19 15:02:14,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-19 15:02:14,328 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2021-11-19 15:02:14,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 15:02:14,524 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:02:14,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:02:14,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1435153425, now seen corresponding path program 1 times [2021-11-19 15:02:14,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:02:14,525 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1576100062] [2021-11-19 15:02:14,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:02:14,526 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:02:14,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:02:14,526 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:02:14,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-19 15:02:15,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:02:15,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 1445 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 15:02:15,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:02:15,447 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-19 15:02:15,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:02:15,875 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-19 15:02:15,876 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:02:15,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1576100062] [2021-11-19 15:02:15,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1576100062] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:02:15,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [795175829] [2021-11-19 15:02:15,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:02:15,877 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:02:15,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:02:15,878 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:02:15,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-19 15:02:19,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:02:19,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 1445 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-19 15:02:19,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:02:20,196 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-19 15:02:20,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:02:20,492 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-19 15:02:20,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [795175829] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:02:20,492 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 15:02:20,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [12, 11] total 21 [2021-11-19 15:02:20,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270798292] [2021-11-19 15:02:20,493 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:02:20,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 15:02:20,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:02:20,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 15:02:20,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-11-19 15:02:20,494 INFO L87 Difference]: Start difference. First operand 147 states and 213 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 7 states have internal predecessors, (34), 4 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-19 15:02:20,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:02:20,669 INFO L93 Difference]: Finished difference Result 170 states and 237 transitions. [2021-11-19 15:02:20,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 15:02:20,670 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 7 states have internal predecessors, (34), 4 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) Word has length 77 [2021-11-19 15:02:20,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:02:20,672 INFO L225 Difference]: With dead ends: 170 [2021-11-19 15:02:20,672 INFO L226 Difference]: Without dead ends: 142 [2021-11-19 15:02:20,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 285 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-11-19 15:02:20,673 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 22 mSDsluCounter, 691 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 793 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:02:20,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 793 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:02:20,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-11-19 15:02:20,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 140. [2021-11-19 15:02:20,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 80 states have (on average 1.1375) internal successors, (91), 84 states have internal predecessors, (91), 44 states have call successors, (44), 11 states have call predecessors, (44), 15 states have return successors, (61), 50 states have call predecessors, (61), 43 states have call successors, (61) [2021-11-19 15:02:20,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 196 transitions. [2021-11-19 15:02:20,686 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 196 transitions. Word has length 77 [2021-11-19 15:02:20,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:02:20,687 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 196 transitions. [2021-11-19 15:02:20,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 7 states have internal predecessors, (34), 4 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-19 15:02:20,687 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 196 transitions. [2021-11-19 15:02:20,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-19 15:02:20,689 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:02:20,689 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2021-11-19 15:02:20,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-19 15:02:20,917 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-11-19 15:02:21,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:02:21,098 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:02:21,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:02:21,098 INFO L85 PathProgramCache]: Analyzing trace with hash -727359888, now seen corresponding path program 1 times [2021-11-19 15:02:21,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:02:21,100 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [804219098] [2021-11-19 15:02:21,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:02:21,100 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:02:21,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:02:21,101 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:02:21,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-19 15:02:21,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:02:21,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 1447 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-19 15:02:21,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:02:22,282 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-19 15:02:22,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:02:23,530 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-19 15:02:23,530 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:02:23,530 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [804219098] [2021-11-19 15:02:23,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [804219098] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:02:23,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1641400599] [2021-11-19 15:02:23,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:02:23,531 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:02:23,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:02:23,536 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:02:23,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-19 15:02:27,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:02:27,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 1447 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-19 15:02:27,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:02:27,863 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-19 15:02:27,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:02:28,086 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-19 15:02:28,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1641400599] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:02:28,087 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 15:02:28,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [16, 15] total 29 [2021-11-19 15:02:28,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911600119] [2021-11-19 15:02:28,087 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:02:28,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 15:02:28,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:02:28,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 15:02:28,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2021-11-19 15:02:28,088 INFO L87 Difference]: Start difference. First operand 140 states and 196 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 6 states have internal predecessors, (33), 3 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 15:02:28,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:02:28,188 INFO L93 Difference]: Finished difference Result 199 states and 289 transitions. [2021-11-19 15:02:28,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 15:02:28,196 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 6 states have internal predecessors, (33), 3 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) Word has length 86 [2021-11-19 15:02:28,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:02:28,198 INFO L225 Difference]: With dead ends: 199 [2021-11-19 15:02:28,199 INFO L226 Difference]: Without dead ends: 157 [2021-11-19 15:02:28,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 313 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2021-11-19 15:02:28,200 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 7 mSDsluCounter, 643 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 755 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:02:28,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 755 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:02:28,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-11-19 15:02:28,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 153. [2021-11-19 15:02:28,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 86 states have (on average 1.127906976744186) internal successors, (97), 90 states have internal predecessors, (97), 51 states have call successors, (51), 11 states have call predecessors, (51), 15 states have return successors, (70), 58 states have call predecessors, (70), 49 states have call successors, (70) [2021-11-19 15:02:28,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 218 transitions. [2021-11-19 15:02:28,215 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 218 transitions. Word has length 86 [2021-11-19 15:02:28,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:02:28,216 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 218 transitions. [2021-11-19 15:02:28,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 6 states have internal predecessors, (33), 3 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 15:02:28,216 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 218 transitions. [2021-11-19 15:02:28,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-19 15:02:28,218 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:02:28,219 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 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] [2021-11-19 15:02:28,247 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-19 15:02:28,441 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-19 15:02:28,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 15:02:28,632 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:02:28,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:02:28,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1085947873, now seen corresponding path program 1 times [2021-11-19 15:02:28,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:02:28,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [446344635] [2021-11-19 15:02:28,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:02:28,634 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:02:28,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:02:28,634 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:02:28,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-19 15:02:29,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:02:29,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 1469 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-19 15:02:29,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:02:30,105 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-11-19 15:02:30,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:02:31,715 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-19 15:02:31,716 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:02:31,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [446344635] [2021-11-19 15:02:31,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [446344635] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:02:31,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1046247129] [2021-11-19 15:02:31,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:02:31,717 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:02:31,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:02:31,717 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:02:31,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-11-19 15:02:35,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:02:35,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 1469 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-19 15:02:35,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:02:36,356 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-11-19 15:02:36,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:02:36,856 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-11-19 15:02:36,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1046247129] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:02:36,857 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 15:02:36,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12, 12] imperfect sequences [23, 22] total 38 [2021-11-19 15:02:36,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850239064] [2021-11-19 15:02:36,857 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:02:36,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 15:02:36,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:02:36,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 15:02:36,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1259, Unknown=0, NotChecked=0, Total=1406 [2021-11-19 15:02:36,859 INFO L87 Difference]: Start difference. First operand 153 states and 218 transitions. Second operand has 13 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 5 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-19 15:02:37,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:02:37,372 INFO L93 Difference]: Finished difference Result 205 states and 297 transitions. [2021-11-19 15:02:37,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 15:02:37,373 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 5 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) Word has length 97 [2021-11-19 15:02:37,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:02:37,375 INFO L225 Difference]: With dead ends: 205 [2021-11-19 15:02:37,375 INFO L226 Difference]: Without dead ends: 172 [2021-11-19 15:02:37,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 348 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=161, Invalid=1479, Unknown=0, NotChecked=0, Total=1640 [2021-11-19 15:02:37,377 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 34 mSDsluCounter, 836 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 946 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 15:02:37,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 946 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 15:02:37,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-11-19 15:02:37,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 153. [2021-11-19 15:02:37,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 86 states have (on average 1.127906976744186) internal successors, (97), 90 states have internal predecessors, (97), 51 states have call successors, (51), 11 states have call predecessors, (51), 15 states have return successors, (68), 58 states have call predecessors, (68), 49 states have call successors, (68) [2021-11-19 15:02:37,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 216 transitions. [2021-11-19 15:02:37,392 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 216 transitions. Word has length 97 [2021-11-19 15:02:37,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:02:37,393 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 216 transitions. [2021-11-19 15:02:37,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 5 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-19 15:02:37,394 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 216 transitions. [2021-11-19 15:02:37,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-19 15:02:37,396 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:02:37,396 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 3, 3, 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] [2021-11-19 15:02:37,429 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-19 15:02:37,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2021-11-19 15:02:37,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 15:02:37,820 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:02:37,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:02:37,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1647697566, now seen corresponding path program 1 times [2021-11-19 15:02:37,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:02:37,822 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1490460452] [2021-11-19 15:02:37,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:02:37,822 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:02:37,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:02:37,823 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:02:37,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-19 15:02:51,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:02:52,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 1485 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-19 15:02:52,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:02:53,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:53,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:53,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:53,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:53,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:53,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:53,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:53,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:53,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:53,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:53,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:53,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:53,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:53,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:53,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:53,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:53,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:53,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:53,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:53,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:53,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:53,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:53,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:53,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:53,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:53,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:53,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:53,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:53,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 28 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 79 [2021-11-19 15:02:59,577 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_save_byte_from_array_#in~storage#1.offset_BEFORE_CALL_1| (_ BitVec 64)) (|v_save_byte_from_array_#in~storage#1.base_BEFORE_CALL_1| (_ BitVec 64)) (|save_byte_from_array_nondet_size_t_#res#1| (_ BitVec 64))) (let ((.cse0 (select |c_#memory_int| |v_save_byte_from_array_#in~storage#1.base_BEFORE_CALL_1|))) (and (= ((_ extract 39 32) |save_byte_from_array_nondet_size_t_#res#1|) (select .cse0 (bvadd (_ bv4 64) |v_save_byte_from_array_#in~storage#1.offset_BEFORE_CALL_1|))) (= (select .cse0 (bvadd (_ bv1 64) |v_save_byte_from_array_#in~storage#1.offset_BEFORE_CALL_1|)) ((_ extract 15 8) |save_byte_from_array_nondet_size_t_#res#1|)) (= ((_ extract 31 24) |save_byte_from_array_nondet_size_t_#res#1|) (select .cse0 (bvadd (_ bv3 64) |v_save_byte_from_array_#in~storage#1.offset_BEFORE_CALL_1|))) (= ((_ extract 7 0) |save_byte_from_array_nondet_size_t_#res#1|) (select .cse0 |v_save_byte_from_array_#in~storage#1.offset_BEFORE_CALL_1|)) (= ((_ extract 55 48) |save_byte_from_array_nondet_size_t_#res#1|) (select .cse0 (bvadd |v_save_byte_from_array_#in~storage#1.offset_BEFORE_CALL_1| (_ bv6 64)))) (= (select .cse0 (bvadd (_ bv2 64) |v_save_byte_from_array_#in~storage#1.offset_BEFORE_CALL_1|)) ((_ extract 23 16) |save_byte_from_array_nondet_size_t_#res#1|)) (= (select .cse0 (bvadd |v_save_byte_from_array_#in~storage#1.offset_BEFORE_CALL_1| (_ bv5 64))) ((_ extract 47 40) |save_byte_from_array_nondet_size_t_#res#1|)) (= (select .cse0 (bvadd |v_save_byte_from_array_#in~storage#1.offset_BEFORE_CALL_1| (_ bv7 64))) ((_ extract 63 56) |save_byte_from_array_nondet_size_t_#res#1|))))) is different from true [2021-11-19 15:12:59,093 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2021-11-19 15:12:59,093 WARN L228 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-11-19 15:12:59,095 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:12:59,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1490460452] [2021-11-19 15:12:59,095 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") [2021-11-19 15:12:59,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [956306780] [2021-11-19 15:12:59,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:12:59,096 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:12:59,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:12:59,096 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:12:59,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d990552c-55ce-4d6a-a657-caa5a520b499/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process