./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/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_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/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_617f09d6-81ae-484c-b804-00c5d270b40f/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 efe93c285b9cfe4b236eb7cc9957c6e5b1b94bff3322775b8e8d61a9769c319e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 15:51:16,125 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 15:51:16,127 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 15:51:16,162 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 15:51:16,163 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 15:51:16,164 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 15:51:16,166 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 15:51:16,169 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 15:51:16,171 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 15:51:16,172 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 15:51:16,174 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 15:51:16,175 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 15:51:16,176 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 15:51:16,177 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 15:51:16,179 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 15:51:16,180 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 15:51:16,182 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 15:51:16,183 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 15:51:16,185 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 15:51:16,188 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 15:51:16,190 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 15:51:16,192 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 15:51:16,193 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 15:51:16,194 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 15:51:16,199 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 15:51:16,199 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 15:51:16,200 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 15:51:16,201 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 15:51:16,202 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 15:51:16,203 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 15:51:16,204 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 15:51:16,205 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 15:51:16,206 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 15:51:16,207 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 15:51:16,208 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 15:51:16,209 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 15:51:16,210 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 15:51:16,210 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 15:51:16,211 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 15:51:16,212 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 15:51:16,213 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 15:51:16,217 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-19 15:51:16,269 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 15:51:16,270 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 15:51:16,271 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 15:51:16,271 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 15:51:16,271 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 15:51:16,271 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 15:51:16,272 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 15:51:16,272 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 15:51:16,272 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 15:51:16,272 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 15:51:16,273 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 15:51:16,273 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 15:51:16,273 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 15:51:16,274 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 15:51:16,274 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 15:51:16,274 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 15:51:16,278 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 15:51:16,278 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 15:51:16,279 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 15:51:16,279 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 15:51:16,279 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 15:51:16,279 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 15:51:16,279 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 15:51:16,280 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 15:51:16,280 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 15:51:16,280 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 15:51:16,281 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 15:51:16,281 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 15:51:16,282 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 15:51:16,282 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 15:51:16,282 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 15:51:16,282 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 15:51:16,283 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 15:51:16,284 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 15:51:16,284 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 15:51:16,284 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 15:51:16,285 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 15:51:16,285 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_617f09d6-81ae-484c-b804-00c5d270b40f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> efe93c285b9cfe4b236eb7cc9957c6e5b1b94bff3322775b8e8d61a9769c319e [2021-11-19 15:51:16,580 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 15:51:16,608 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 15:51:16,612 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 15:51:16,613 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 15:51:16,614 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 15:51:16,615 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_harness.i [2021-11-19 15:51:16,701 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/data/93d766a03/ccd7753b8aef4ed7934d8fdbb704ec78/FLAGb9bec70d3 [2021-11-19 15:51:17,611 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 15:51:17,612 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_harness.i [2021-11-19 15:51:17,657 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/data/93d766a03/ccd7753b8aef4ed7934d8fdbb704ec78/FLAGb9bec70d3 [2021-11-19 15:51:18,122 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/data/93d766a03/ccd7753b8aef4ed7934d8fdbb704ec78 [2021-11-19 15:51:18,125 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 15:51:18,126 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 15:51:18,132 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 15:51:18,132 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 15:51:18,136 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 15:51:18,136 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:51:18" (1/1) ... [2021-11-19 15:51:18,137 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d27ab84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:51:18, skipping insertion in model container [2021-11-19 15:51:18,138 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:51:18" (1/1) ... [2021-11-19 15:51:18,149 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 15:51:18,276 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 15:51:18,564 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_617f09d6-81ae-484c-b804-00c5d270b40f/sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_harness.i[4489,4502] [2021-11-19 15:51:18,570 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_617f09d6-81ae-484c-b804-00c5d270b40f/sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_harness.i[4549,4562] [2021-11-19 15:51:18,593 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-19 15:51:18,598 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-19 15:51:19,497 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:51:19,507 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:51:19,508 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:51:19,509 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:51:19,511 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:51:19,539 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:51:19,543 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:51:19,545 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:51:19,547 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:51:20,013 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-19 15:51:20,015 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-19 15:51:20,016 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-19 15:51:20,018 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-19 15:51:20,020 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-19 15:51:20,022 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-19 15:51:20,023 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-19 15:51:20,024 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-19 15:51:20,025 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-19 15:51:20,028 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-19 15:51:20,206 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-19 15:51:20,322 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:51:20,323 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:51:20,379 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:51:20,429 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 15:51:20,430 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@39075070 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:51:20, skipping insertion in model container [2021-11-19 15:51:20,430 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 15:51:20,431 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 15:51:20,433 INFO L158 Benchmark]: Toolchain (without parser) took 2305.40ms. Allocated memory was 117.4MB in the beginning and 153.1MB in the end (delta: 35.7MB). Free memory was 77.5MB in the beginning and 73.3MB in the end (delta: 4.2MB). Peak memory consumption was 40.2MB. Max. memory is 16.1GB. [2021-11-19 15:51:20,433 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 117.4MB. Free memory is still 70.2MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 15:51:20,434 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2298.43ms. Allocated memory was 117.4MB in the beginning and 153.1MB in the end (delta: 35.7MB). Free memory was 77.5MB in the beginning and 73.3MB in the end (delta: 4.2MB). Peak memory consumption was 40.2MB. Max. memory is 16.1GB. [2021-11-19 15:51:20,436 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 117.4MB. Free memory is still 70.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2298.43ms. Allocated memory was 117.4MB in the beginning and 153.1MB in the end (delta: 35.7MB). Free memory was 77.5MB in the beginning and 73.3MB in the end (delta: 4.2MB). Peak memory consumption was 40.2MB. 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_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/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_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/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_617f09d6-81ae-484c-b804-00c5d270b40f/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 efe93c285b9cfe4b236eb7cc9957c6e5b1b94bff3322775b8e8d61a9769c319e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 15:51:22,617 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 15:51:22,619 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 15:51:22,648 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 15:51:22,649 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 15:51:22,650 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 15:51:22,652 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 15:51:22,655 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 15:51:22,657 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 15:51:22,658 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 15:51:22,659 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 15:51:22,661 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 15:51:22,661 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 15:51:22,663 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 15:51:22,664 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 15:51:22,666 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 15:51:22,667 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 15:51:22,668 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 15:51:22,670 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 15:51:22,673 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 15:51:22,675 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 15:51:22,680 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 15:51:22,682 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 15:51:22,683 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 15:51:22,687 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 15:51:22,688 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 15:51:22,688 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 15:51:22,690 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 15:51:22,690 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 15:51:22,692 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 15:51:22,692 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 15:51:22,694 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 15:51:22,703 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 15:51:22,706 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 15:51:22,712 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 15:51:22,712 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 15:51:22,713 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 15:51:22,713 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 15:51:22,714 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 15:51:22,716 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 15:51:22,717 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 15:51:22,723 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-19 15:51:22,770 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 15:51:22,771 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 15:51:22,772 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 15:51:22,772 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 15:51:22,773 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 15:51:22,773 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 15:51:22,773 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 15:51:22,773 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 15:51:22,774 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 15:51:22,774 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 15:51:22,776 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 15:51:22,777 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 15:51:22,777 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 15:51:22,777 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 15:51:22,777 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 15:51:22,777 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 15:51:22,778 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 15:51:22,778 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 15:51:22,778 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 15:51:22,778 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 15:51:22,779 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 15:51:22,779 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 15:51:22,779 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 15:51:22,779 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 15:51:22,780 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 15:51:22,780 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 15:51:22,780 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 15:51:22,780 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 15:51:22,781 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 15:51:22,781 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 15:51:22,781 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 15:51:22,781 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 15:51:22,782 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 15:51:22,782 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_617f09d6-81ae-484c-b804-00c5d270b40f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> efe93c285b9cfe4b236eb7cc9957c6e5b1b94bff3322775b8e8d61a9769c319e [2021-11-19 15:51:23,172 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 15:51:23,201 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 15:51:23,203 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 15:51:23,204 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 15:51:23,206 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 15:51:23,208 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_harness.i [2021-11-19 15:51:23,287 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/data/528bfd5e0/52ae4cf4933d4c50b7e0a8d637e9da69/FLAG69487f363 [2021-11-19 15:51:24,185 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 15:51:24,186 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_harness.i [2021-11-19 15:51:24,235 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/data/528bfd5e0/52ae4cf4933d4c50b7e0a8d637e9da69/FLAG69487f363 [2021-11-19 15:51:24,667 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/data/528bfd5e0/52ae4cf4933d4c50b7e0a8d637e9da69 [2021-11-19 15:51:24,670 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 15:51:24,671 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 15:51:24,673 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 15:51:24,673 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 15:51:24,676 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 15:51:24,677 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:51:24" (1/1) ... [2021-11-19 15:51:24,678 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4af096d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:51:24, skipping insertion in model container [2021-11-19 15:51:24,678 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:51:24" (1/1) ... [2021-11-19 15:51:24,687 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 15:51:24,803 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 15:51:25,092 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_617f09d6-81ae-484c-b804-00c5d270b40f/sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_harness.i[4489,4502] [2021-11-19 15:51:25,107 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_617f09d6-81ae-484c-b804-00c5d270b40f/sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_harness.i[4549,4562] [2021-11-19 15:51:25,131 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-19 15:51:25,142 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-19 15:51:26,570 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:51:26,571 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:51:26,574 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:51:26,575 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:51:26,577 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:51:26,605 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:51:26,607 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:51:26,619 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:51:26,620 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:51:27,169 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-19 15:51:27,170 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-19 15:51:27,172 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-19 15:51:27,173 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-19 15:51:27,175 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-19 15:51:27,176 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-19 15:51:27,177 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-19 15:51:27,178 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-19 15:51:27,178 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-19 15:51:27,179 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-19 15:51:27,459 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-19 15:51:27,621 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:51:27,639 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:51:27,710 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:51:27,776 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 15:51:27,879 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 15:51:27,884 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_617f09d6-81ae-484c-b804-00c5d270b40f/sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_harness.i[4489,4502] [2021-11-19 15:51:27,885 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_617f09d6-81ae-484c-b804-00c5d270b40f/sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_harness.i[4549,4562] [2021-11-19 15:51:27,887 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-19 15:51:27,890 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-19 15:51:27,930 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:51:27,931 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:51:27,931 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:51:27,932 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:51:27,932 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:51:27,939 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:51:27,940 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:51:27,941 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:51:27,941 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:51:27,992 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-19 15:51:27,993 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-19 15:51:27,995 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-19 15:51:27,996 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-19 15:51:27,997 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-19 15:51:27,997 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-19 15:51:28,001 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-19 15:51:28,002 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-19 15:51:28,002 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-19 15:51:28,005 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-19 15:51:28,053 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-19 15:51:28,107 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:51:28,107 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:51:28,133 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:51:28,162 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 15:51:28,198 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_617f09d6-81ae-484c-b804-00c5d270b40f/sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_harness.i[4489,4502] [2021-11-19 15:51:28,198 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_617f09d6-81ae-484c-b804-00c5d270b40f/sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_harness.i[4549,4562] [2021-11-19 15:51:28,200 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-19 15:51:28,200 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-19 15:51:28,227 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:51:28,227 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:51:28,228 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:51:28,228 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:51:28,229 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:51:28,234 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:51:28,235 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:51:28,235 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:51:28,236 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:51:28,264 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-19 15:51:28,265 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-19 15:51:28,266 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-19 15:51:28,266 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-19 15:51:28,267 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-19 15:51:28,267 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-19 15:51:28,268 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-19 15:51:28,268 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-19 15:51:28,269 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-19 15:51:28,269 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-19 15:51:28,288 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-19 15:51:28,474 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:51:28,474 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:51:28,525 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:51:28,859 INFO L208 MainTranslator]: Completed translation [2021-11-19 15:51:28,860 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:51:28 WrapperNode [2021-11-19 15:51:28,860 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 15:51:28,861 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 15:51:28,861 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 15:51:28,861 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 15:51:28,868 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:51:28" (1/1) ... [2021-11-19 15:51:29,010 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:51:28" (1/1) ... [2021-11-19 15:51:29,108 INFO L137 Inliner]: procedures = 713, calls = 2668, calls flagged for inlining = 60, calls inlined = 6, statements flattened = 884 [2021-11-19 15:51:29,109 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 15:51:29,110 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 15:51:29,111 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 15:51:29,111 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 15:51:29,120 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:51:28" (1/1) ... [2021-11-19 15:51:29,121 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:51:28" (1/1) ... [2021-11-19 15:51:29,138 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:51:28" (1/1) ... [2021-11-19 15:51:29,139 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:51:28" (1/1) ... [2021-11-19 15:51:29,187 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:51:28" (1/1) ... [2021-11-19 15:51:29,206 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:51:28" (1/1) ... [2021-11-19 15:51:29,217 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:51:28" (1/1) ... [2021-11-19 15:51:29,241 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 15:51:29,248 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 15:51:29,249 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 15:51:29,249 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 15:51:29,251 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:51:28" (1/1) ... [2021-11-19 15:51:29,258 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 15:51:29,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:51:29,282 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 15:51:29,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 15:51:29,331 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2021-11-19 15:51:29,331 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2021-11-19 15:51:29,331 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-19 15:51:29,332 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 15:51:29,332 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-11-19 15:51:29,332 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-11-19 15:51:29,332 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 15:51:29,333 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-19 15:51:29,334 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-19 15:51:29,334 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-19 15:51:29,334 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-19 15:51:29,334 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-19 15:51:29,334 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 15:51:29,335 INFO L130 BoogieDeclarations]: Found specification of procedure save_byte_from_array [2021-11-19 15:51:29,335 INFO L138 BoogieDeclarations]: Found implementation of procedure save_byte_from_array [2021-11-19 15:51:29,335 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-19 15:51:29,335 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_byte_buf_has_allocated_buffer_member [2021-11-19 15:51:29,335 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_byte_buf_has_allocated_buffer_member [2021-11-19 15:51:29,336 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 15:51:29,336 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 15:51:29,336 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-19 15:51:29,336 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-19 15:51:29,337 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-19 15:51:29,337 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2021-11-19 15:51:29,337 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2021-11-19 15:51:29,337 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-19 15:51:29,337 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-19 15:51:29,337 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-19 15:51:29,338 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 15:51:29,338 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-19 15:51:29,338 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_eq [2021-11-19 15:51:29,338 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_eq [2021-11-19 15:51:29,339 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-19 15:51:29,339 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-19 15:51:29,339 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-19 15:51:29,339 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-11-19 15:51:29,340 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-11-19 15:51:29,340 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-11-19 15:51:29,343 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-11-19 15:51:29,343 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_bounded [2021-11-19 15:51:29,343 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_bounded [2021-11-19 15:51:29,343 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_buf_equivalence [2021-11-19 15:51:29,343 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_buf_equivalence [2021-11-19 15:51:29,707 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 15:51:29,709 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 15:51:35,765 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 15:51:35,775 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 15:51:35,775 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-19 15:51:35,778 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 03:51:35 BoogieIcfgContainer [2021-11-19 15:51:35,778 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 15:51:35,780 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 15:51:35,780 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 15:51:35,783 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 15:51:35,784 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 03:51:24" (1/3) ... [2021-11-19 15:51:35,784 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e5039e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 03:51:35, skipping insertion in model container [2021-11-19 15:51:35,785 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:51:28" (2/3) ... [2021-11-19 15:51:35,785 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e5039e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 03:51:35, skipping insertion in model container [2021-11-19 15:51:35,785 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 03:51:35" (3/3) ... [2021-11-19 15:51:35,787 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_eq_harness.i [2021-11-19 15:51:35,793 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 15:51:35,793 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 15:51:35,851 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 15:51:35,857 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 15:51:35,858 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 15:51:35,878 INFO L276 IsEmpty]: Start isEmpty. Operand has 153 states, 92 states have (on average 1.2282608695652173) internal successors, (113), 93 states have internal predecessors, (113), 46 states have call successors, (46), 13 states have call predecessors, (46), 13 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2021-11-19 15:51:35,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-19 15:51:35,892 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:51:35,893 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:51:35,893 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:51:35,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:51:35,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1419889978, now seen corresponding path program 1 times [2021-11-19 15:51:35,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:51:35,915 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [776466358] [2021-11-19 15:51:35,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:51:35,916 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:51:35,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:51:35,920 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:51:35,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 15:51:36,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:51:37,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 1582 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-19 15:51:37,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:51:37,386 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-19 15:51:37,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:51:37,720 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 15:51:37,721 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:51:37,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [776466358] [2021-11-19 15:51:37,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [776466358] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:51:37,722 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:51:37,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2021-11-19 15:51:37,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538113632] [2021-11-19 15:51:37,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:51:37,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 15:51:37,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:51:37,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 15:51:37,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 15:51:37,765 INFO L87 Difference]: Start difference. First operand has 153 states, 92 states have (on average 1.2282608695652173) internal successors, (113), 93 states have internal predecessors, (113), 46 states have call successors, (46), 13 states have call predecessors, (46), 13 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) Second operand has 2 states, 2 states have (on average 23.5) internal successors, (47), 2 states have internal predecessors, (47), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-19 15:51:37,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:51:37,815 INFO L93 Difference]: Finished difference Result 302 states and 436 transitions. [2021-11-19 15:51:37,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 15:51:37,817 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 23.5) internal successors, (47), 2 states have internal predecessors, (47), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 113 [2021-11-19 15:51:37,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:51:37,829 INFO L225 Difference]: With dead ends: 302 [2021-11-19 15:51:37,829 INFO L226 Difference]: Without dead ends: 148 [2021-11-19 15:51:37,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 15:51:37,839 INFO L933 BasicCegarLoop]: 203 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, 203 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 15:51:37,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 15:51:37,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-11-19 15:51:37,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2021-11-19 15:51:37,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 88 states have (on average 1.2159090909090908) internal successors, (107), 89 states have internal predecessors, (107), 46 states have call successors, (46), 13 states have call predecessors, (46), 13 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2021-11-19 15:51:37,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 198 transitions. [2021-11-19 15:51:37,902 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 198 transitions. Word has length 113 [2021-11-19 15:51:37,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:51:37,904 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 198 transitions. [2021-11-19 15:51:37,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 23.5) internal successors, (47), 2 states have internal predecessors, (47), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-19 15:51:37,905 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 198 transitions. [2021-11-19 15:51:37,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-19 15:51:37,909 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:51:37,910 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:51:37,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 15:51:38,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:51:38,123 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:51:38,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:51:38,124 INFO L85 PathProgramCache]: Analyzing trace with hash -254215752, now seen corresponding path program 1 times [2021-11-19 15:51:38,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:51:38,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [890424007] [2021-11-19 15:51:38,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:51:38,130 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:51:38,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:51:38,131 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:51:38,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 15:51:39,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:51:39,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 1582 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 15:51:39,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:51:40,088 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-19 15:51:40,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:51:40,587 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 15:51:40,588 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:51:40,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [890424007] [2021-11-19 15:51:40,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [890424007] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:51:40,590 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:51:40,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 5 [2021-11-19 15:51:40,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158577114] [2021-11-19 15:51:40,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:51:40,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 15:51:40,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:51:40,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 15:51:40,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 15:51:40,596 INFO L87 Difference]: Start difference. First operand 148 states and 198 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 3 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-19 15:51:42,698 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:51:43,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:51:43,237 INFO L93 Difference]: Finished difference Result 333 states and 466 transitions. [2021-11-19 15:51:43,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 15:51:43,239 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 3 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 113 [2021-11-19 15:51:43,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:51:43,245 INFO L225 Difference]: With dead ends: 333 [2021-11-19 15:51:43,245 INFO L226 Difference]: Without dead ends: 192 [2021-11-19 15:51:43,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 15:51:43,249 INFO L933 BasicCegarLoop]: 243 mSDtfsCounter, 47 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 869 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-19 15:51:43,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 869 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 98 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2021-11-19 15:51:43,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-11-19 15:51:43,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 185. [2021-11-19 15:51:43,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 107 states have (on average 1.205607476635514) internal successors, (129), 110 states have internal predecessors, (129), 63 states have call successors, (63), 13 states have call predecessors, (63), 14 states have return successors, (73), 61 states have call predecessors, (73), 62 states have call successors, (73) [2021-11-19 15:51:43,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 265 transitions. [2021-11-19 15:51:43,292 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 265 transitions. Word has length 113 [2021-11-19 15:51:43,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:51:43,292 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 265 transitions. [2021-11-19 15:51:43,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 3 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-19 15:51:43,293 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 265 transitions. [2021-11-19 15:51:43,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-19 15:51:43,296 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:51:43,296 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:51:43,340 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 15:51:43,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:51:43,515 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:51:43,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:51:43,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1731779843, now seen corresponding path program 1 times [2021-11-19 15:51:43,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:51:43,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [209297990] [2021-11-19 15:51:43,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:51:43,522 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:51:43,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:51:43,529 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:51:43,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 15:51:44,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:51:44,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 1595 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 15:51:44,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:51:45,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-19 15:51:46,648 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-19 15:51:46,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:51:48,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 34 [2021-11-19 15:51:48,212 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 15:51:48,212 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:51:48,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [209297990] [2021-11-19 15:51:48,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [209297990] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:51:48,212 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:51:48,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [11] total 18 [2021-11-19 15:51:48,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499523721] [2021-11-19 15:51:48,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:51:48,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 15:51:48,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:51:48,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 15:51:48,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-11-19 15:51:48,215 INFO L87 Difference]: Start difference. First operand 185 states and 265 transitions. Second operand has 13 states, 12 states have (on average 4.5) internal successors, (54), 10 states have internal predecessors, (54), 5 states have call successors, (20), 3 states have call predecessors, (20), 5 states have return successors, (19), 6 states have call predecessors, (19), 5 states have call successors, (19) [2021-11-19 15:51:50,356 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:51:52,617 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:51:52,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:51:52,859 INFO L93 Difference]: Finished difference Result 383 states and 543 transitions. [2021-11-19 15:51:52,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 15:51:52,860 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.5) internal successors, (54), 10 states have internal predecessors, (54), 5 states have call successors, (20), 3 states have call predecessors, (20), 5 states have return successors, (19), 6 states have call predecessors, (19), 5 states have call successors, (19) Word has length 119 [2021-11-19 15:51:52,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:51:52,864 INFO L225 Difference]: With dead ends: 383 [2021-11-19 15:51:52,864 INFO L226 Difference]: Without dead ends: 198 [2021-11-19 15:51:52,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-11-19 15:51:52,867 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 18 mSDsluCounter, 1577 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 1769 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-11-19 15:51:52,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 1769 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 2 Unknown, 98 Unchecked, 4.5s Time] [2021-11-19 15:51:52,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-11-19 15:51:52,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2021-11-19 15:51:52,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 119 states have (on average 1.2100840336134453) internal successors, (144), 122 states have internal predecessors, (144), 63 states have call successors, (63), 14 states have call predecessors, (63), 15 states have return successors, (74), 61 states have call predecessors, (74), 62 states have call successors, (74) [2021-11-19 15:51:52,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 281 transitions. [2021-11-19 15:51:52,893 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 281 transitions. Word has length 119 [2021-11-19 15:51:52,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:51:52,894 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 281 transitions. [2021-11-19 15:51:52,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.5) internal successors, (54), 10 states have internal predecessors, (54), 5 states have call successors, (20), 3 states have call predecessors, (20), 5 states have return successors, (19), 6 states have call predecessors, (19), 5 states have call successors, (19) [2021-11-19 15:51:52,895 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 281 transitions. [2021-11-19 15:51:52,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-19 15:51:52,897 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:51:52,898 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:51:52,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 15:51:53,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:51:53,111 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:51:53,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:51:53,112 INFO L85 PathProgramCache]: Analyzing trace with hash 673941765, now seen corresponding path program 1 times [2021-11-19 15:51:53,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:51:53,114 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2057063148] [2021-11-19 15:51:53,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:51:53,115 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:51:53,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:51:53,115 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:51:53,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 15:51:54,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:51:54,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 1592 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 15:51:54,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:51:54,537 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-19 15:51:54,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:51:54,867 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-11-19 15:51:54,868 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:51:54,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2057063148] [2021-11-19 15:51:54,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2057063148] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:51:54,868 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:51:54,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2021-11-19 15:51:54,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068840664] [2021-11-19 15:51:54,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:51:54,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 15:51:54,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:51:54,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 15:51:54,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 15:51:54,870 INFO L87 Difference]: Start difference. First operand 198 states and 281 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-19 15:51:54,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:51:54,941 INFO L93 Difference]: Finished difference Result 386 states and 561 transitions. [2021-11-19 15:51:54,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 15:51:54,941 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 119 [2021-11-19 15:51:54,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:51:54,950 INFO L225 Difference]: With dead ends: 386 [2021-11-19 15:51:54,950 INFO L226 Difference]: Without dead ends: 204 [2021-11-19 15:51:54,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 15:51:54,954 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 20 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 15:51:54,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 586 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 15:51:54,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-11-19 15:51:54,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 192. [2021-11-19 15:51:54,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 114 states have (on average 1.2105263157894737) internal successors, (138), 116 states have internal predecessors, (138), 63 states have call successors, (63), 14 states have call predecessors, (63), 14 states have return successors, (73), 61 states have call predecessors, (73), 62 states have call successors, (73) [2021-11-19 15:51:54,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 274 transitions. [2021-11-19 15:51:54,995 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 274 transitions. Word has length 119 [2021-11-19 15:51:54,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:51:54,996 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 274 transitions. [2021-11-19 15:51:54,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-19 15:51:54,997 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 274 transitions. [2021-11-19 15:51:55,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-19 15:51:55,004 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:51:55,004 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:51:55,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 15:51:55,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:51:55,227 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:51:55,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:51:55,227 INFO L85 PathProgramCache]: Analyzing trace with hash -772634293, now seen corresponding path program 1 times [2021-11-19 15:51:55,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:51:55,230 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [83033670] [2021-11-19 15:51:55,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:51:55,230 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:51:55,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:51:55,231 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:51:55,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 15:51:56,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:51:56,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 1604 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 15:51:56,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:51:57,173 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-19 15:51:57,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:51:57,854 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-11-19 15:51:57,855 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:51:57,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [83033670] [2021-11-19 15:51:57,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [83033670] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:51:57,856 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:51:57,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2021-11-19 15:51:57,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371309253] [2021-11-19 15:51:57,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:51:57,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 15:51:57,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:51:57,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 15:51:57,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-19 15:51:57,864 INFO L87 Difference]: Start difference. First operand 192 states and 274 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-19 15:52:00,003 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:52:02,007 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:52:04,561 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:52:06,578 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:52:07,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:52:07,306 INFO L93 Difference]: Finished difference Result 392 states and 581 transitions. [2021-11-19 15:52:07,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 15:52:07,311 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 123 [2021-11-19 15:52:07,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:52:07,314 INFO L225 Difference]: With dead ends: 392 [2021-11-19 15:52:07,314 INFO L226 Difference]: Without dead ends: 212 [2021-11-19 15:52:07,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 238 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-19 15:52:07,317 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 42 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 0 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 715 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2021-11-19 15:52:07,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 715 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 82 Invalid, 4 Unknown, 40 Unchecked, 9.3s Time] [2021-11-19 15:52:07,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-11-19 15:52:07,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 201. [2021-11-19 15:52:07,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 123 states have (on average 1.2195121951219512) internal successors, (150), 125 states have internal predecessors, (150), 63 states have call successors, (63), 14 states have call predecessors, (63), 14 states have return successors, (73), 61 states have call predecessors, (73), 62 states have call successors, (73) [2021-11-19 15:52:07,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 286 transitions. [2021-11-19 15:52:07,338 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 286 transitions. Word has length 123 [2021-11-19 15:52:07,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:52:07,339 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 286 transitions. [2021-11-19 15:52:07,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-19 15:52:07,340 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 286 transitions. [2021-11-19 15:52:07,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-19 15:52:07,342 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:52:07,342 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:52:07,377 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 15:52:07,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:52:07,557 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:52:07,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:52:07,558 INFO L85 PathProgramCache]: Analyzing trace with hash 794123657, now seen corresponding path program 1 times [2021-11-19 15:52:07,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:52:07,560 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1055439435] [2021-11-19 15:52:07,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:52:07,560 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:52:07,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:52:07,561 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:52:07,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 15:52:08,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:52:08,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 1601 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-19 15:52:08,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:52:10,995 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-19 15:52:10,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:52:13,381 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-11-19 15:52:13,382 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:52:13,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1055439435] [2021-11-19 15:52:13,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1055439435] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:52:13,382 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:52:13,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [12] total 19 [2021-11-19 15:52:13,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175893133] [2021-11-19 15:52:13,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:52:13,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 15:52:13,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:52:13,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 15:52:13,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-11-19 15:52:13,384 INFO L87 Difference]: Start difference. First operand 201 states and 286 transitions. Second operand has 12 states, 11 states have (on average 5.545454545454546) internal successors, (61), 11 states have internal predecessors, (61), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-19 15:52:15,495 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:52:17,502 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:52:21,618 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:52:23,641 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:52:24,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:52:24,964 INFO L93 Difference]: Finished difference Result 400 states and 601 transitions. [2021-11-19 15:52:24,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 15:52:24,969 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 5.545454545454546) internal successors, (61), 11 states have internal predecessors, (61), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 123 [2021-11-19 15:52:24,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:52:24,974 INFO L225 Difference]: With dead ends: 400 [2021-11-19 15:52:24,974 INFO L226 Difference]: Without dead ends: 210 [2021-11-19 15:52:24,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 226 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-11-19 15:52:24,978 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 38 mSDsluCounter, 1659 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 2 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 1855 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 319 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2021-11-19 15:52:24,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 1855 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 243 Invalid, 3 Unknown, 319 Unchecked, 9.8s Time] [2021-11-19 15:52:24,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-11-19 15:52:25,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 206. [2021-11-19 15:52:25,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 127 states have (on average 1.1968503937007875) internal successors, (152), 130 states have internal predecessors, (152), 63 states have call successors, (63), 14 states have call predecessors, (63), 15 states have return successors, (85), 61 states have call predecessors, (85), 62 states have call successors, (85) [2021-11-19 15:52:25,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 300 transitions. [2021-11-19 15:52:25,020 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 300 transitions. Word has length 123 [2021-11-19 15:52:25,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:52:25,020 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 300 transitions. [2021-11-19 15:52:25,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 5.545454545454546) internal successors, (61), 11 states have internal predecessors, (61), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-19 15:52:25,021 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 300 transitions. [2021-11-19 15:52:25,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-19 15:52:25,026 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:52:25,026 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:52:25,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 15:52:25,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:52:25,239 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:52:25,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:52:25,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1358910515, now seen corresponding path program 1 times [2021-11-19 15:52:25,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:52:25,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1245134082] [2021-11-19 15:52:25,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:52:25,242 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:52:25,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:52:25,242 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:52:25,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 15:52:26,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:52:26,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 1602 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 15:52:26,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:52:26,641 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-19 15:52:26,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:52:27,016 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-11-19 15:52:27,017 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:52:27,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1245134082] [2021-11-19 15:52:27,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1245134082] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:52:27,017 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:52:27,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2021-11-19 15:52:27,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834392584] [2021-11-19 15:52:27,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:52:27,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 15:52:27,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:52:27,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 15:52:27,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 15:52:27,019 INFO L87 Difference]: Start difference. First operand 206 states and 300 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-19 15:52:27,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:52:27,109 INFO L93 Difference]: Finished difference Result 404 states and 599 transitions. [2021-11-19 15:52:27,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 15:52:27,110 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 123 [2021-11-19 15:52:27,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:52:27,117 INFO L225 Difference]: With dead ends: 404 [2021-11-19 15:52:27,118 INFO L226 Difference]: Without dead ends: 210 [2021-11-19 15:52:27,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 15:52:27,124 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 34 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:52:27,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 577 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:52:27,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-11-19 15:52:27,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 202. [2021-11-19 15:52:27,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 123 states have (on average 1.1788617886178863) internal successors, (145), 126 states have internal predecessors, (145), 63 states have call successors, (63), 14 states have call predecessors, (63), 15 states have return successors, (85), 61 states have call predecessors, (85), 62 states have call successors, (85) [2021-11-19 15:52:27,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 293 transitions. [2021-11-19 15:52:27,171 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 293 transitions. Word has length 123 [2021-11-19 15:52:27,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:52:27,171 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 293 transitions. [2021-11-19 15:52:27,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-19 15:52:27,172 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 293 transitions. [2021-11-19 15:52:27,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-19 15:52:27,175 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:52:27,175 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:52:27,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 15:52:27,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:52:27,399 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:52:27,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:52:27,400 INFO L85 PathProgramCache]: Analyzing trace with hash 517572303, now seen corresponding path program 1 times [2021-11-19 15:52:27,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:52:27,402 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1616094082] [2021-11-19 15:52:27,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:52:27,402 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:52:27,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:52:27,403 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:52:27,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 15:52:28,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:52:28,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 1599 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 15:52:28,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:52:28,720 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-19 15:52:28,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:52:29,161 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-11-19 15:52:29,161 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:52:29,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1616094082] [2021-11-19 15:52:29,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1616094082] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:52:29,162 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:52:29,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 10 [2021-11-19 15:52:29,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368551656] [2021-11-19 15:52:29,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:52:29,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 15:52:29,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:52:29,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 15:52:29,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-19 15:52:29,164 INFO L87 Difference]: Start difference. First operand 202 states and 293 transitions. Second operand has 9 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-19 15:52:29,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:52:29,551 INFO L93 Difference]: Finished difference Result 403 states and 604 transitions. [2021-11-19 15:52:29,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 15:52:29,552 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 123 [2021-11-19 15:52:29,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:52:29,554 INFO L225 Difference]: With dead ends: 403 [2021-11-19 15:52:29,554 INFO L226 Difference]: Without dead ends: 211 [2021-11-19 15:52:29,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-19 15:52:29,557 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 12 mSDsluCounter, 1236 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1419 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 15:52:29,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 1419 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 15:52:29,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-11-19 15:52:29,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 202. [2021-11-19 15:52:29,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 123 states have (on average 1.1788617886178863) internal successors, (145), 126 states have internal predecessors, (145), 63 states have call successors, (63), 14 states have call predecessors, (63), 15 states have return successors, (85), 61 states have call predecessors, (85), 62 states have call successors, (85) [2021-11-19 15:52:29,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 293 transitions. [2021-11-19 15:52:29,579 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 293 transitions. Word has length 123 [2021-11-19 15:52:29,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:52:29,579 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 293 transitions. [2021-11-19 15:52:29,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-19 15:52:29,580 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 293 transitions. [2021-11-19 15:52:29,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-19 15:52:29,582 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:52:29,582 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:52:29,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 15:52:29,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:52:29,795 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:52:29,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:52:29,795 INFO L85 PathProgramCache]: Analyzing trace with hash -257858412, now seen corresponding path program 1 times [2021-11-19 15:52:29,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:52:29,798 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [549524494] [2021-11-19 15:52:29,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:52:29,798 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:52:29,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:52:29,800 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:52:29,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 15:52:30,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:52:30,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 1603 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 15:52:30,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:52:31,305 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-19 15:52:31,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:52:31,766 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 15:52:31,767 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:52:31,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [549524494] [2021-11-19 15:52:31,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [549524494] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:52:31,767 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:52:31,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2021-11-19 15:52:31,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700352834] [2021-11-19 15:52:31,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:52:31,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 15:52:31,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:52:31,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 15:52:31,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-19 15:52:31,770 INFO L87 Difference]: Start difference. First operand 202 states and 293 transitions. Second operand has 6 states, 5 states have (on average 12.4) internal successors, (62), 6 states have internal predecessors, (62), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 4 states have call successors, (19) [2021-11-19 15:52:33,832 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:52:34,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:52:34,222 INFO L93 Difference]: Finished difference Result 340 states and 497 transitions. [2021-11-19 15:52:34,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:52:34,223 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 12.4) internal successors, (62), 6 states have internal predecessors, (62), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 4 states have call successors, (19) Word has length 125 [2021-11-19 15:52:34,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:52:34,226 INFO L225 Difference]: With dead ends: 340 [2021-11-19 15:52:34,227 INFO L226 Difference]: Without dead ends: 202 [2021-11-19 15:52:34,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-19 15:52:34,231 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 63 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 46 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 813 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-19 15:52:34,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 813 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 58 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-19 15:52:34,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-11-19 15:52:34,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 168. [2021-11-19 15:52:34,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 106 states have (on average 1.179245283018868) internal successors, (125), 108 states have internal predecessors, (125), 46 states have call successors, (46), 14 states have call predecessors, (46), 15 states have return successors, (56), 45 states have call predecessors, (56), 45 states have call successors, (56) [2021-11-19 15:52:34,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 227 transitions. [2021-11-19 15:52:34,250 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 227 transitions. Word has length 125 [2021-11-19 15:52:34,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:52:34,252 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 227 transitions. [2021-11-19 15:52:34,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 12.4) internal successors, (62), 6 states have internal predecessors, (62), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 4 states have call successors, (19) [2021-11-19 15:52:34,252 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 227 transitions. [2021-11-19 15:52:34,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-19 15:52:34,254 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:52:34,255 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:52:34,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 15:52:34,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:52:34,476 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:52:34,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:52:34,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1951625386, now seen corresponding path program 1 times [2021-11-19 15:52:34,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:52:34,478 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [562300190] [2021-11-19 15:52:34,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:52:34,478 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:52:34,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:52:34,479 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:52:34,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 15:52:35,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:52:35,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 1629 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 15:52:35,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:52:35,956 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-19 15:52:35,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:52:36,359 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-11-19 15:52:36,359 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:52:36,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [562300190] [2021-11-19 15:52:36,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [562300190] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:52:36,360 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:52:36,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2021-11-19 15:52:36,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719802136] [2021-11-19 15:52:36,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:52:36,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 15:52:36,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:52:36,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 15:52:36,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-19 15:52:36,361 INFO L87 Difference]: Start difference. First operand 168 states and 227 transitions. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2021-11-19 15:52:39,367 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:52:41,385 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:52:41,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:52:41,641 INFO L93 Difference]: Finished difference Result 293 states and 398 transitions. [2021-11-19 15:52:41,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:52:41,642 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) Word has length 137 [2021-11-19 15:52:41,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:52:41,643 INFO L225 Difference]: With dead ends: 293 [2021-11-19 15:52:41,643 INFO L226 Difference]: Without dead ends: 165 [2021-11-19 15:52:41,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-19 15:52:41,645 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 62 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 39 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 829 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2021-11-19 15:52:41,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 829 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 43 Invalid, 2 Unknown, 0 Unchecked, 5.2s Time] [2021-11-19 15:52:41,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-11-19 15:52:41,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2021-11-19 15:52:41,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 104 states have (on average 1.1730769230769231) internal successors, (122), 105 states have internal predecessors, (122), 46 states have call successors, (46), 14 states have call predecessors, (46), 14 states have return successors, (52), 45 states have call predecessors, (52), 45 states have call successors, (52) [2021-11-19 15:52:41,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 220 transitions. [2021-11-19 15:52:41,658 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 220 transitions. Word has length 137 [2021-11-19 15:52:41,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:52:41,658 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 220 transitions. [2021-11-19 15:52:41,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2021-11-19 15:52:41,659 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 220 transitions. [2021-11-19 15:52:41,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-19 15:52:41,661 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:52:41,661 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:52:41,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 15:52:41,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:52:41,887 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:52:41,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:52:41,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1702496139, now seen corresponding path program 1 times [2021-11-19 15:52:41,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:52:41,889 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1513825103] [2021-11-19 15:52:41,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:52:41,889 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:52:41,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:52:41,890 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:52:41,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 15:52:42,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:52:43,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 1642 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-19 15:52:43,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:52:47,554 INFO L354 Elim1Store]: treesize reduction 64, result has 1.5 percent of original size [2021-11-19 15:52:47,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 28 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 197 treesize of output 69 [2021-11-19 15:52:48,273 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 89 proven. 16 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-19 15:52:48,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:53:05,070 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 15:53:05,070 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:53:05,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1513825103] [2021-11-19 15:53:05,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1513825103] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:53:05,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [892332124] [2021-11-19 15:53:05,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:53:05,070 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:53:05,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:53:05,072 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:53:05,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-19 15:53:07,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:53:07,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 1642 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-19 15:53:07,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:53:08,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:08,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:08,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:08,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:08,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:08,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:08,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:08,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:08,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:08,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:08,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:08,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:08,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:08,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:08,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:08,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:08,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:08,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:08,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:08,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:08,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:08,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:08,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:08,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:08,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:08,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:08,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:08,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:08,088 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 15:53:08,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 563 treesize of output 179 [2021-11-19 15:53:08,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:08,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:08,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:08,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:08,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:08,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:08,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:08,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:08,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:08,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:08,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:08,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:08,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:08,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:08,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:08,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:08,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:08,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:08,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:08,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:08,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:08,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:08,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:08,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:08,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:08,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:08,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:08,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:08,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:08,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:08,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:08,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:08,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:08,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:08,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:08,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:08,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 36 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 179 treesize of output 193 [2021-11-19 15:53:10,319 INFO L354 Elim1Store]: treesize reduction 64, result has 1.5 percent of original size [2021-11-19 15:53:10,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 28 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 197 treesize of output 69 [2021-11-19 15:53:10,731 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 89 proven. 16 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-19 15:53:10,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:53:22,001 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 15:53:22,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [892332124] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:53:22,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756556942] [2021-11-19 15:53:22,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:53:22,002 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 15:53:22,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:53:22,003 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 15:53:22,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-19 15:53:23,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:53:23,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 1642 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-19 15:53:23,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:53:24,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-19 15:53:28,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:28,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:28,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:28,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:28,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:28,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:28,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:28,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:28,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:28,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:28,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:28,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:28,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:28,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:28,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:28,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:28,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:28,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:28,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:28,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:28,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:28,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:28,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:28,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:28,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:28,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:28,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:28,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:28,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:28,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:28,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:28,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:28,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:28,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:28,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:28,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:28,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 36 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 131 treesize of output 39 [2021-11-19 15:53:28,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:28,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 38 [2021-11-19 15:53:28,723 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 15:53:28,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2021-11-19 15:53:35,671 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-19 15:53:35,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:53:41,006 INFO L354 Elim1Store]: treesize reduction 1602, result has 1.0 percent of original size [2021-11-19 15:53:41,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 8 case distinctions, treesize of input 130 treesize of output 38 [2021-11-19 15:53:41,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2021-11-19 15:53:41,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2021-11-19 15:53:41,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 34 [2021-11-19 15:53:42,076 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-11-19 15:53:42,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756556942] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:53:42,077 INFO L186 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2021-11-19 15:53:42,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [19, 14, 19, 14, 14] total 52 [2021-11-19 15:53:42,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870321564] [2021-11-19 15:53:42,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:53:42,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-19 15:53:42,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:53:42,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-19 15:53:42,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=2461, Unknown=3, NotChecked=0, Total=2652 [2021-11-19 15:53:42,081 INFO L87 Difference]: Start difference. First operand 165 states and 220 transitions. Second operand has 17 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 8 states have call successors, (20), 4 states have call predecessors, (20), 7 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) [2021-11-19 15:53:44,214 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:53:46,221 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:53:49,606 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:53:51,219 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:53:53,235 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:53:55,248 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:53:57,259 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:54:01,462 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:54:03,480 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:54:05,410 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:54:06,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:54:06,438 INFO L93 Difference]: Finished difference Result 368 states and 504 transitions. [2021-11-19 15:54:06,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-19 15:54:06,439 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 8 states have call successors, (20), 4 states have call predecessors, (20), 7 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) Word has length 143 [2021-11-19 15:54:06,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:54:06,441 INFO L225 Difference]: With dead ends: 368 [2021-11-19 15:54:06,442 INFO L226 Difference]: Without dead ends: 264 [2021-11-19 15:54:06,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 866 GetRequests, 779 SyntacticMatches, 26 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1356 ImplicationChecksByTransitivity, 45.1s TimeCoverageRelationStatistics Valid=271, Invalid=3632, Unknown=3, NotChecked=0, Total=3906 [2021-11-19 15:54:06,445 INFO L933 BasicCegarLoop]: 235 mSDtfsCounter, 116 mSDsluCounter, 738 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 76 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 973 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 410 IncrementalHoareTripleChecker+Unchecked, 21.2s IncrementalHoareTripleChecker+Time [2021-11-19 15:54:06,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 973 Invalid, 1029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 537 Invalid, 6 Unknown, 410 Unchecked, 21.2s Time] [2021-11-19 15:54:06,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-11-19 15:54:06,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 222. [2021-11-19 15:54:06,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 148 states have (on average 1.1689189189189189) internal successors, (173), 152 states have internal predecessors, (173), 53 states have call successors, (53), 17 states have call predecessors, (53), 20 states have return successors, (69), 52 states have call predecessors, (69), 52 states have call successors, (69) [2021-11-19 15:54:06,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 295 transitions. [2021-11-19 15:54:06,462 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 295 transitions. Word has length 143 [2021-11-19 15:54:06,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:54:06,463 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 295 transitions. [2021-11-19 15:54:06,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 8 states have call successors, (20), 4 states have call predecessors, (20), 7 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) [2021-11-19 15:54:06,463 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 295 transitions. [2021-11-19 15:54:06,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-19 15:54:06,466 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:54:06,466 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:54:06,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-19 15:54:06,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 15:54:06,926 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-11-19 15:54:07,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 15:54:07,075 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:54:07,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:54:07,076 INFO L85 PathProgramCache]: Analyzing trace with hash -671455241, now seen corresponding path program 1 times [2021-11-19 15:54:07,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:54:07,078 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [893506507] [2021-11-19 15:54:07,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:54:07,079 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:54:07,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:54:07,082 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:54:07,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-19 15:54:08,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:54:08,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 1645 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-19 15:54:08,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:54:12,696 INFO L354 Elim1Store]: treesize reduction 64, result has 1.5 percent of original size [2021-11-19 15:54:12,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 28 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 197 treesize of output 69 [2021-11-19 15:54:13,471 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 89 proven. 16 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-19 15:54:13,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:54:32,108 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 15:54:32,108 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:54:32,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [893506507] [2021-11-19 15:54:32,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [893506507] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:54:32,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [162316285] [2021-11-19 15:54:32,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:54:32,110 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:54:32,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:54:32,111 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:54:32,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-19 15:54:34,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:54:34,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 1645 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-19 15:54:34,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:54:34,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:34,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:34,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:34,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:34,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:34,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:34,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:34,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:34,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:34,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:34,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:34,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:34,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:34,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:34,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:34,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:34,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:34,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:34,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:34,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:34,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:34,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:34,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:34,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:34,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:34,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:34,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:34,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:34,950 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 15:54:34,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 563 treesize of output 179 [2021-11-19 15:54:34,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:34,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:34,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:34,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:34,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:34,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:34,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:34,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:34,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:34,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:34,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:34,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:34,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:34,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:34,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:34,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:34,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:34,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:34,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:34,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:34,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:34,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:34,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:34,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:35,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:35,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:35,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:35,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:35,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:35,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:35,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:35,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:35,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:35,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:35,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:35,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:35,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 36 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 179 treesize of output 193 [2021-11-19 15:54:37,011 INFO L354 Elim1Store]: treesize reduction 64, result has 1.5 percent of original size [2021-11-19 15:54:37,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 28 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 197 treesize of output 69 [2021-11-19 15:54:37,329 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 89 proven. 16 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-19 15:54:37,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:54:47,605 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 15:54:47,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [162316285] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:54:47,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190909424] [2021-11-19 15:54:47,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:54:47,606 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 15:54:47,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:54:47,607 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 15:54:47,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-19 15:54:48,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:54:48,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 1645 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-19 15:54:48,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:54:49,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-19 15:54:53,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:53,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:53,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:53,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:53,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:53,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:53,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:53,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:53,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:53,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:53,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:53,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:53,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:53,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:53,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:53,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:53,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:53,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:53,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:53,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:53,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:53,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:53,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:53,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:53,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:53,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:53,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:53,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:53,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:53,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:53,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:53,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:53,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:53,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:53,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:53,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:53,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 36 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 131 treesize of output 39 [2021-11-19 15:54:53,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:53,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 38 [2021-11-19 15:54:53,339 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 15:54:53,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2021-11-19 15:54:59,352 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-19 15:54:59,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:55:03,873 INFO L354 Elim1Store]: treesize reduction 1602, result has 1.0 percent of original size [2021-11-19 15:55:03,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 8 case distinctions, treesize of input 130 treesize of output 38 [2021-11-19 15:55:03,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2021-11-19 15:55:03,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2021-11-19 15:55:04,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 34 [2021-11-19 15:55:04,668 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-11-19 15:55:04,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190909424] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:55:04,669 INFO L186 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2021-11-19 15:55:04,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [19, 14, 19, 14, 14] total 52 [2021-11-19 15:55:04,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541700497] [2021-11-19 15:55:04,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:55:04,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-19 15:55:04,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:55:04,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-19 15:55:04,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=2463, Unknown=1, NotChecked=0, Total=2652 [2021-11-19 15:55:04,671 INFO L87 Difference]: Start difference. First operand 222 states and 295 transitions. Second operand has 17 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 8 states have call successors, (20), 4 states have call predecessors, (20), 7 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) [2021-11-19 15:55:06,765 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:55:08,772 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:55:10,780 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:55:12,789 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:55:14,797 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:55:18,646 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:55:23,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:55:23,174 INFO L93 Difference]: Finished difference Result 420 states and 574 transitions. [2021-11-19 15:55:23,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-19 15:55:23,175 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 8 states have call successors, (20), 4 states have call predecessors, (20), 7 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) Word has length 143 [2021-11-19 15:55:23,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:55:23,179 INFO L225 Difference]: With dead ends: 420 [2021-11-19 15:55:23,179 INFO L226 Difference]: Without dead ends: 316 [2021-11-19 15:55:23,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 863 GetRequests, 778 SyntacticMatches, 26 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1317 ImplicationChecksByTransitivity, 43.2s TimeCoverageRelationStatistics Valid=248, Invalid=3411, Unknown=1, NotChecked=0, Total=3660 [2021-11-19 15:55:23,182 INFO L933 BasicCegarLoop]: 243 mSDtfsCounter, 111 mSDsluCounter, 1432 mSDsCounter, 0 mSdLazyCounter, 1146 mSolverCounterSat, 68 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 1675 SdHoareTripleChecker+Invalid, 1620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1146 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 400 IncrementalHoareTripleChecker+Unchecked, 16.2s IncrementalHoareTripleChecker+Time [2021-11-19 15:55:23,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 1675 Invalid, 1620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1146 Invalid, 6 Unknown, 400 Unchecked, 16.2s Time] [2021-11-19 15:55:23,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-11-19 15:55:23,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 211. [2021-11-19 15:55:23,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 141 states have (on average 1.1702127659574468) internal successors, (165), 144 states have internal predecessors, (165), 50 states have call successors, (50), 17 states have call predecessors, (50), 19 states have return successors, (55), 49 states have call predecessors, (55), 49 states have call successors, (55) [2021-11-19 15:55:23,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 270 transitions. [2021-11-19 15:55:23,202 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 270 transitions. Word has length 143 [2021-11-19 15:55:23,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:55:23,202 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 270 transitions. [2021-11-19 15:55:23,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 8 states have call successors, (20), 4 states have call predecessors, (20), 7 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) [2021-11-19 15:55:23,203 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 270 transitions. [2021-11-19 15:55:23,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-19 15:55:23,205 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:55:23,205 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:55:23,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-19 15:55:23,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-11-19 15:55:23,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-19 15:55:23,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:55:23,820 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:55:23,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:55:23,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1560381467, now seen corresponding path program 1 times [2021-11-19 15:55:23,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:55:23,823 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [456687861] [2021-11-19 15:55:23,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:55:23,823 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:55:23,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:55:23,824 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:55:23,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_617f09d6-81ae-484c-b804-00c5d270b40f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-19 15:55:24,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:55:24,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 1658 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-19 15:55:24,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:55:28,927 INFO L354 Elim1Store]: treesize reduction 64, result has 1.5 percent of original size [2021-11-19 15:55:28,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 28 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 197 treesize of output 69 [2021-11-19 15:55:29,530 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 97 proven. 16 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-19 15:55:29,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:55:36,620 INFO L354 Elim1Store]: treesize reduction 1572, result has 0.1 percent of original size [2021-11-19 15:55:36,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 252 treesize of output 1 [2021-11-19 15:56:12,271 WARN L227 SmtUtils]: Spent 26.79s on a formula simplification. DAG size of input: 1166 DAG size of output: 513 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-19 15:56:12,277 INFO L354 Elim1Store]: treesize reduction 2280, result has 39.2 percent of original size [2021-11-19 15:56:12,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 24 select indices, 24 select index equivalence classes, 0 disjoint index pairs (out of 276 index pairs), introduced 24 new quantified variables, introduced 276 case distinctions, treesize of input 252 treesize of output 1538