./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash de3da06dbfc8734cb93dce42b312357899e8d9cc914b94ba94740650fa2d8258 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:28:57,442 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:28:57,446 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:28:57,503 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:28:57,503 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:28:57,508 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:28:57,510 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:28:57,512 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:28:57,514 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:28:57,516 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:28:57,517 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:28:57,519 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:28:57,519 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:28:57,521 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:28:57,522 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:28:57,524 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:28:57,525 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:28:57,527 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:28:57,529 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:28:57,535 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:28:57,540 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:28:57,541 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:28:57,543 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:28:57,545 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:28:57,553 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:28:57,556 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:28:57,557 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:28:57,559 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:28:57,561 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:28:57,562 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:28:57,563 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:28:57,564 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:28:57,566 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:28:57,568 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:28:57,570 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:28:57,570 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:28:57,571 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:28:57,571 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:28:57,572 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:28:57,573 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:28:57,574 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:28:57,575 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-12 22:28:57,629 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:28:57,629 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:28:57,631 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:28:57,631 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:28:57,632 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:28:57,632 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:28:57,632 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:28:57,633 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 22:28:57,639 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:28:57,640 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:28:57,641 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 22:28:57,641 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 22:28:57,642 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:28:57,642 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 22:28:57,642 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 22:28:57,642 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 22:28:57,644 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:28:57,644 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 22:28:57,644 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:28:57,645 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:28:57,645 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:28:57,645 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:28:57,645 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:28:57,646 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:28:57,646 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:28:57,646 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:28:57,646 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:28:57,647 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:28:57,647 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:28:57,649 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:28:57,649 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:28:57,649 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:28:57,650 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 22:28:57,650 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 22:28:57,650 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:28:57,651 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:28:57,651 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:28:57,651 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_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> de3da06dbfc8734cb93dce42b312357899e8d9cc914b94ba94740650fa2d8258 [2021-11-12 22:28:57,989 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:28:58,029 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:28:58,033 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:28:58,034 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:28:58,035 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:28:58,037 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_harness.i [2021-11-12 22:28:58,185 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF/data/eb07ac22a/1ca6d62ba45949f195a664049c94daec/FLAGaa284b8d3 [2021-11-12 22:28:59,071 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:28:59,072 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_harness.i [2021-11-12 22:28:59,123 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF/data/eb07ac22a/1ca6d62ba45949f195a664049c94daec/FLAGaa284b8d3 [2021-11-12 22:28:59,529 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF/data/eb07ac22a/1ca6d62ba45949f195a664049c94daec [2021-11-12 22:28:59,534 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:28:59,537 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:28:59,541 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:28:59,541 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:28:59,545 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:28:59,546 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:28:59" (1/1) ... [2021-11-12 22:28:59,548 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5114c360 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:28:59, skipping insertion in model container [2021-11-12 22:28:59,548 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:28:59" (1/1) ... [2021-11-12 22:28:59,556 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:28:59,698 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:29:00,053 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_harness.i[4494,4507] [2021-11-12 22:29:00,062 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_harness.i[4554,4567] [2021-11-12 22:29:00,092 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-12 22:29:00,100 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-12 22:29:01,213 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:29:01,215 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:29:01,218 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:29:01,220 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:29:01,221 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:29:01,241 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:29:01,242 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:29:01,244 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:29:01,245 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:29:01,766 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-12 22:29:01,767 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-12 22:29:01,769 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-12 22:29:01,770 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-12 22:29:01,774 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-12 22:29:01,775 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-12 22:29:01,776 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-12 22:29:01,777 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-12 22:29:01,778 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-12 22:29:01,779 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-12 22:29:02,014 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-12 22:29:02,045 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:29:02,045 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:29:02,181 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:29:02,182 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:29:02,245 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:29:02,300 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-12 22:29:02,301 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@d75f41e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:02, skipping insertion in model container [2021-11-12 22:29:02,301 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:29:02,302 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 22:29:02,306 INFO L158 Benchmark]: Toolchain (without parser) took 2765.66ms. Allocated memory was 92.3MB in the beginning and 117.4MB in the end (delta: 25.2MB). Free memory was 49.8MB in the beginning and 69.7MB in the end (delta: -19.8MB). Peak memory consumption was 26.6MB. Max. memory is 16.1GB. [2021-11-12 22:29:02,307 INFO L158 Benchmark]: CDTParser took 19.41ms. Allocated memory is still 92.3MB. Free memory was 46.6MB in the beginning and 65.8MB in the end (delta: -19.2MB). Peak memory consumption was 8.0MB. Max. memory is 16.1GB. [2021-11-12 22:29:02,309 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2760.96ms. Allocated memory was 92.3MB in the beginning and 117.4MB in the end (delta: 25.2MB). Free memory was 49.7MB in the beginning and 69.7MB in the end (delta: -20.0MB). Peak memory consumption was 26.6MB. Max. memory is 16.1GB. [2021-11-12 22:29:02,312 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 19.41ms. Allocated memory is still 92.3MB. Free memory was 46.6MB in the beginning and 65.8MB in the end (delta: -19.2MB). Peak memory consumption was 8.0MB. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2760.96ms. Allocated memory was 92.3MB in the beginning and 117.4MB in the end (delta: 25.2MB). Free memory was 49.7MB in the beginning and 69.7MB in the end (delta: -20.0MB). Peak memory consumption was 26.6MB. 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_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash de3da06dbfc8734cb93dce42b312357899e8d9cc914b94ba94740650fa2d8258 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:29:04,718 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:29:04,721 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:29:04,781 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:29:04,782 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:29:04,786 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:29:04,789 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:29:04,793 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:29:04,797 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:29:04,805 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:29:04,806 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:29:04,808 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:29:04,809 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:29:04,812 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:29:04,814 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:29:04,819 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:29:04,821 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:29:04,822 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:29:04,825 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:29:04,833 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:29:04,835 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:29:04,836 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:29:04,839 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:29:04,841 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:29:04,848 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:29:04,848 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:29:04,849 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:29:04,851 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:29:04,852 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:29:04,853 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:29:04,853 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:29:04,854 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:29:04,856 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:29:04,857 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:29:04,859 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:29:04,859 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:29:04,860 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:29:04,872 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:29:04,872 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:29:04,873 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:29:04,874 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:29:04,875 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-12 22:29:04,900 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:29:04,900 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:29:04,901 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:29:04,901 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:29:04,901 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:29:04,902 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:29:04,902 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:29:04,902 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:29:04,902 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:29:04,902 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:29:04,903 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:29:04,903 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:29:04,904 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:29:04,904 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:29:04,904 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:29:04,904 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:29:04,904 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 22:29:04,905 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 22:29:04,905 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:29:04,905 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:29:04,905 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:29:04,905 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:29:04,906 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 22:29:04,906 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:29:04,906 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:29:04,906 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:29:04,906 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:29:04,907 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:29:04,907 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 22:29:04,907 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 22:29:04,907 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:29:04,907 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:29:04,908 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:29:04,908 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_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> de3da06dbfc8734cb93dce42b312357899e8d9cc914b94ba94740650fa2d8258 [2021-11-12 22:29:05,364 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:29:05,398 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:29:05,401 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:29:05,402 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:29:05,403 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:29:05,405 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_harness.i [2021-11-12 22:29:05,503 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF/data/d91546859/949691af3e6e4737bda46a8ba620c7b6/FLAG102878afa [2021-11-12 22:29:06,464 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:29:06,468 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_harness.i [2021-11-12 22:29:06,521 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF/data/d91546859/949691af3e6e4737bda46a8ba620c7b6/FLAG102878afa [2021-11-12 22:29:06,916 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF/data/d91546859/949691af3e6e4737bda46a8ba620c7b6 [2021-11-12 22:29:06,918 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:29:06,919 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:29:06,920 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:29:06,921 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:29:06,925 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:29:06,927 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:29:06" (1/1) ... [2021-11-12 22:29:06,928 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ae148d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:06, skipping insertion in model container [2021-11-12 22:29:06,928 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:29:06" (1/1) ... [2021-11-12 22:29:06,936 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:29:07,057 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:29:07,387 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_harness.i[4494,4507] [2021-11-12 22:29:07,397 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_harness.i[4554,4567] [2021-11-12 22:29:07,419 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-12 22:29:07,424 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-12 22:29:08,469 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:29:08,471 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:29:08,471 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:29:08,473 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:29:08,474 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:29:08,499 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:29:08,500 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:29:08,502 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:29:08,503 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:29:08,984 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-12 22:29:08,986 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-12 22:29:08,987 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-12 22:29:08,989 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-12 22:29:08,991 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-12 22:29:08,992 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-12 22:29:08,993 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-12 22:29:08,994 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-12 22:29:08,995 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-12 22:29:08,996 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-12 22:29:09,270 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-12 22:29:09,334 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:29:09,336 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:29:09,489 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:29:09,489 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:29:09,561 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:29:09,641 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 22:29:09,742 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:29:09,748 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_harness.i[4494,4507] [2021-11-12 22:29:09,750 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_harness.i[4554,4567] [2021-11-12 22:29:09,752 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-12 22:29:09,752 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-12 22:29:09,822 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:29:09,822 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:29:09,823 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:29:09,824 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:29:09,825 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:29:09,841 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:29:09,842 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:29:09,843 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:29:09,844 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:29:09,922 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-12 22:29:09,923 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-12 22:29:09,924 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-12 22:29:09,929 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-12 22:29:09,930 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-12 22:29:09,931 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-12 22:29:09,932 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-12 22:29:09,941 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-12 22:29:09,942 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-12 22:29:09,944 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-12 22:29:09,983 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-12 22:29:10,031 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:29:10,032 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:29:10,105 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:29:10,106 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:29:10,147 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:29:10,203 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:29:10,231 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_harness.i[4494,4507] [2021-11-12 22:29:10,232 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_harness.i[4554,4567] [2021-11-12 22:29:10,233 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-12 22:29:10,234 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-12 22:29:10,266 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:29:10,266 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:29:10,267 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:29:10,267 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:29:10,268 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:29:10,274 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:29:10,274 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:29:10,275 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:29:10,276 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:29:10,352 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-12 22:29:10,353 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-12 22:29:10,354 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-12 22:29:10,354 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-12 22:29:10,355 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-12 22:29:10,356 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-12 22:29:10,356 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-12 22:29:10,357 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-12 22:29:10,357 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-12 22:29:10,358 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-12 22:29:10,377 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-12 22:29:10,390 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:29:10,390 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:29:10,435 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:29:10,435 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:29:10,461 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:29:10,955 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:29:10,956 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:10 WrapperNode [2021-11-12 22:29:10,957 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:29:10,959 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:29:10,959 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:29:10,959 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:29:10,968 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:10" (1/1) ... [2021-11-12 22:29:11,154 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:10" (1/1) ... [2021-11-12 22:29:11,276 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:29:11,278 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:29:11,278 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:29:11,278 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:29:11,288 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:10" (1/1) ... [2021-11-12 22:29:11,288 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:10" (1/1) ... [2021-11-12 22:29:11,307 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:10" (1/1) ... [2021-11-12 22:29:11,308 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:10" (1/1) ... [2021-11-12 22:29:11,395 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:10" (1/1) ... [2021-11-12 22:29:11,418 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:10" (1/1) ... [2021-11-12 22:29:11,446 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:10" (1/1) ... [2021-11-12 22:29:11,477 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:29:11,479 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:29:11,479 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:29:11,479 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:29:11,480 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:10" (1/1) ... [2021-11-12 22:29:11,489 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:29:11,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:29:11,519 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:29:11,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:29:11,581 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2021-11-12 22:29:11,582 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2021-11-12 22:29:11,582 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-12 22:29:11,583 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-11-12 22:29:11,583 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-11-12 22:29:11,583 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 22:29:11,583 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-12 22:29:11,584 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-12 22:29:11,584 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2021-11-12 22:29:11,584 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2021-11-12 22:29:11,584 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-12 22:29:11,584 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-12 22:29:11,585 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-12 22:29:11,585 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-12 22:29:11,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:29:11,585 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:29:11,585 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-12 22:29:11,586 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-12 22:29:11,586 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-12 22:29:11,586 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_realloc [2021-11-12 22:29:11,586 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_realloc [2021-11-12 22:29:11,586 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-12 22:29:11,587 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_reserve [2021-11-12 22:29:11,587 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_reserve [2021-11-12 22:29:11,587 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_release [2021-11-12 22:29:11,587 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_release [2021-11-12 22:29:11,588 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-12 22:29:11,588 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-12 22:29:11,588 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:29:11,588 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-12 22:29:11,589 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-12 22:29:11,589 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-12 22:29:11,590 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-11-12 22:29:11,595 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-11-12 22:29:11,596 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-11-12 22:29:11,597 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-11-12 22:29:26,377 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:29:26,378 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-12 22:29:26,380 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:29:26 BoogieIcfgContainer [2021-11-12 22:29:26,381 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:29:26,383 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:29:26,383 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:29:26,387 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:29:26,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:29:06" (1/3) ... [2021-11-12 22:29:26,388 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42197253 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:29:26, skipping insertion in model container [2021-11-12 22:29:26,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:10" (2/3) ... [2021-11-12 22:29:26,389 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42197253 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:29:26, skipping insertion in model container [2021-11-12 22:29:26,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:29:26" (3/3) ... [2021-11-12 22:29:26,391 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_reserve_harness.i [2021-11-12 22:29:26,397 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:29:26,398 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 22:29:26,462 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:29:26,470 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 22:29:26,470 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 22:29:26,494 INFO L276 IsEmpty]: Start isEmpty. Operand has 152 states, 103 states have (on average 1.2912621359223302) internal successors, (133), 103 states have internal predecessors, (133), 37 states have call successors, (37), 11 states have call predecessors, (37), 11 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2021-11-12 22:29:26,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-12 22:29:26,505 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:29:26,506 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:29:26,507 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:29:26,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:29:26,513 INFO L85 PathProgramCache]: Analyzing trace with hash 34757618, now seen corresponding path program 1 times [2021-11-12 22:29:26,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:29:26,538 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [486459358] [2021-11-12 22:29:26,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:29:26,540 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:29:26,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:29:26,546 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:29:26,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 22:29:30,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:29:30,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 1779 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-12 22:29:30,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:31,168 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 22:29:31,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:31,342 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 22:29:31,343 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:29:31,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [486459358] [2021-11-12 22:29:31,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [486459358] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:29:31,345 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:29:31,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-12 22:29:31,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211201065] [2021-11-12 22:29:31,348 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:29:31,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 22:29:31,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:29:31,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 22:29:31,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 22:29:31,387 INFO L87 Difference]: Start difference. First operand has 152 states, 103 states have (on average 1.2912621359223302) internal successors, (133), 103 states have internal predecessors, (133), 37 states have call successors, (37), 11 states have call predecessors, (37), 11 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) Second operand has 2 states, 2 states have (on average 16.5) internal successors, (33), 2 states have internal predecessors, (33), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-12 22:29:31,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:29:31,434 INFO L93 Difference]: Finished difference Result 294 states and 420 transitions. [2021-11-12 22:29:31,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 22:29:31,438 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 16.5) internal successors, (33), 2 states have internal predecessors, (33), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 48 [2021-11-12 22:29:31,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:29:31,449 INFO L225 Difference]: With dead ends: 294 [2021-11-12 22:29:31,449 INFO L226 Difference]: Without dead ends: 145 [2021-11-12 22:29:31,455 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 22:29:31,459 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.15ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-12 22:29:31,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 3.15ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-12 22:29:31,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-11-12 22:29:31,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-11-12 22:29:31,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 96 states have (on average 1.2395833333333333) internal successors, (119), 97 states have internal predecessors, (119), 37 states have call successors, (37), 11 states have call predecessors, (37), 11 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2021-11-12 22:29:31,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 192 transitions. [2021-11-12 22:29:31,519 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 192 transitions. Word has length 48 [2021-11-12 22:29:31,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:29:31,520 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 192 transitions. [2021-11-12 22:29:31,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 16.5) internal successors, (33), 2 states have internal predecessors, (33), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-12 22:29:31,521 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 192 transitions. [2021-11-12 22:29:31,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-12 22:29:31,524 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:29:31,524 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:29:31,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 22:29:31,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:29:31,743 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:29:31,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:29:31,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1801114826, now seen corresponding path program 1 times [2021-11-12 22:29:31,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:29:31,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1285175146] [2021-11-12 22:29:31,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:29:31,757 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:29:31,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:29:31,759 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:29:31,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 22:29:35,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:29:36,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 1783 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 22:29:36,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:36,430 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:29:36,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:36,817 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 22:29:36,817 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:29:36,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1285175146] [2021-11-12 22:29:36,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1285175146] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:29:36,817 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:29:36,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-12 22:29:36,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523635590] [2021-11-12 22:29:36,818 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:29:36,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:29:36,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:29:36,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:29:36,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:29:36,821 INFO L87 Difference]: Start difference. First operand 145 states and 192 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-12 22:29:37,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:29:37,078 INFO L93 Difference]: Finished difference Result 277 states and 371 transitions. [2021-11-12 22:29:37,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:29:37,082 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 49 [2021-11-12 22:29:37,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:29:37,089 INFO L225 Difference]: With dead ends: 277 [2021-11-12 22:29:37,089 INFO L226 Difference]: Without dead ends: 148 [2021-11-12 22:29:37,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:29:37,092 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 37 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 198.79ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.90ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 221.98ms IncrementalHoareTripleChecker+Time [2021-11-12 22:29:37,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 498 Invalid, 41 Unknown, 0 Unchecked, 5.90ms Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 221.98ms Time] [2021-11-12 22:29:37,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-11-12 22:29:37,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2021-11-12 22:29:37,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 98 states have (on average 1.2346938775510203) internal successors, (121), 100 states have internal predecessors, (121), 37 states have call successors, (37), 11 states have call predecessors, (37), 12 states have return successors, (40), 36 states have call predecessors, (40), 36 states have call successors, (40) [2021-11-12 22:29:37,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 198 transitions. [2021-11-12 22:29:37,114 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 198 transitions. Word has length 49 [2021-11-12 22:29:37,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:29:37,115 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 198 transitions. [2021-11-12 22:29:37,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-12 22:29:37,116 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 198 transitions. [2021-11-12 22:29:37,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-12 22:29:37,118 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:29:37,118 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:29:37,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 22:29:37,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:29:37,332 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:29:37,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:29:37,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1399790987, now seen corresponding path program 1 times [2021-11-12 22:29:37,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:29:37,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [886524550] [2021-11-12 22:29:37,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:29:37,337 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:29:37,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:29:37,338 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:29:37,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 22:29:41,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:29:41,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 1796 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 22:29:41,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:41,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-12 22:29:42,989 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:29:42,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:44,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 34 [2021-11-12 22:29:44,482 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 22:29:44,483 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:29:44,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [886524550] [2021-11-12 22:29:44,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [886524550] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:29:44,483 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:29:44,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11, 10] imperfect sequences [] total 18 [2021-11-12 22:29:44,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904313278] [2021-11-12 22:29:44,484 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:29:44,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-12 22:29:44,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:29:44,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-12 22:29:44,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-11-12 22:29:44,487 INFO L87 Difference]: Start difference. First operand 148 states and 198 transitions. Second operand has 18 states, 18 states have (on average 3.5) internal successors, (63), 15 states have internal predecessors, (63), 6 states have call successors, (14), 3 states have call predecessors, (14), 5 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2021-11-12 22:29:46,732 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.24s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:29:48,742 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:29:50,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:29:50,650 INFO L93 Difference]: Finished difference Result 301 states and 404 transitions. [2021-11-12 22:29:50,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-12 22:29:50,654 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 15 states have internal predecessors, (63), 6 states have call successors, (14), 3 states have call predecessors, (14), 5 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) Word has length 55 [2021-11-12 22:29:50,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:29:50,657 INFO L225 Difference]: With dead ends: 301 [2021-11-12 22:29:50,657 INFO L226 Difference]: Without dead ends: 162 [2021-11-12 22:29:50,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-11-12 22:29:50,660 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 72 mSDsluCounter, 1506 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 26 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5611.83ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 1681 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 19.06ms SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 147 IncrementalHoareTripleChecker+Unchecked, 5845.89ms IncrementalHoareTripleChecker+Time [2021-11-12 22:29:50,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 1681 Invalid, 432 Unknown, 0 Unchecked, 19.06ms Time], IncrementalHoareTripleChecker [26 Valid, 257 Invalid, 2 Unknown, 147 Unchecked, 5845.89ms Time] [2021-11-12 22:29:50,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-11-12 22:29:50,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 161. [2021-11-12 22:29:50,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 110 states have (on average 1.2363636363636363) internal successors, (136), 112 states have internal predecessors, (136), 37 states have call successors, (37), 12 states have call predecessors, (37), 13 states have return successors, (45), 36 states have call predecessors, (45), 36 states have call successors, (45) [2021-11-12 22:29:50,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 218 transitions. [2021-11-12 22:29:50,714 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 218 transitions. Word has length 55 [2021-11-12 22:29:50,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:29:50,715 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 218 transitions. [2021-11-12 22:29:50,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 15 states have internal predecessors, (63), 6 states have call successors, (14), 3 states have call predecessors, (14), 5 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2021-11-12 22:29:50,715 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 218 transitions. [2021-11-12 22:29:50,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-12 22:29:50,719 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:29:50,719 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:29:50,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 22:29:50,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:29:50,920 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:29:50,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:29:50,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1422423241, now seen corresponding path program 1 times [2021-11-12 22:29:50,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:29:50,925 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [540207464] [2021-11-12 22:29:50,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:29:50,925 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:29:50,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:29:50,926 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:29:50,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 22:29:55,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:29:55,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 1793 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:29:55,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:55,396 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:29:55,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:55,570 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 22:29:55,570 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:29:55,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [540207464] [2021-11-12 22:29:55,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [540207464] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:29:55,571 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:29:55,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-12 22:29:55,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136510922] [2021-11-12 22:29:55,571 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:29:55,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:29:55,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:29:55,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:29:55,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:29:55,573 INFO L87 Difference]: Start difference. First operand 161 states and 218 transitions. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 22:29:55,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:29:55,661 INFO L93 Difference]: Finished difference Result 307 states and 424 transitions. [2021-11-12 22:29:55,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:29:55,663 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 55 [2021-11-12 22:29:55,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:29:55,666 INFO L225 Difference]: With dead ends: 307 [2021-11-12 22:29:55,666 INFO L226 Difference]: Without dead ends: 171 [2021-11-12 22:29:55,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:29:55,669 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 20 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 49.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 568 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.49ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 54.92ms IncrementalHoareTripleChecker+Time [2021-11-12 22:29:55,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 568 Invalid, 16 Unknown, 0 Unchecked, 2.49ms Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 54.92ms Time] [2021-11-12 22:29:55,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-11-12 22:29:55,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 159. [2021-11-12 22:29:55,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 108 states have (on average 1.2314814814814814) internal successors, (133), 110 states have internal predecessors, (133), 37 states have call successors, (37), 12 states have call predecessors, (37), 13 states have return successors, (45), 36 states have call predecessors, (45), 36 states have call successors, (45) [2021-11-12 22:29:55,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 215 transitions. [2021-11-12 22:29:55,723 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 215 transitions. Word has length 55 [2021-11-12 22:29:55,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:29:55,723 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 215 transitions. [2021-11-12 22:29:55,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 22:29:55,724 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 215 transitions. [2021-11-12 22:29:55,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-12 22:29:55,726 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:29:55,727 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:29:55,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 22:29:55,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:29:55,943 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:29:55,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:29:55,944 INFO L85 PathProgramCache]: Analyzing trace with hash 216836291, now seen corresponding path program 1 times [2021-11-12 22:29:55,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:29:55,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1083999100] [2021-11-12 22:29:55,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:29:55,947 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:29:55,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:29:55,949 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:29:55,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 22:30:00,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:30:00,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 1805 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:30:00,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:30:01,062 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:30:01,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:30:01,646 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 22:30:01,646 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:30:01,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1083999100] [2021-11-12 22:30:01,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1083999100] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:30:01,647 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:30:01,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-11-12 22:30:01,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838534029] [2021-11-12 22:30:01,648 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:30:01,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:30:01,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:30:01,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:30:01,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:30:01,649 INFO L87 Difference]: Start difference. First operand 159 states and 215 transitions. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 22:30:03,932 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.28s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:30:05,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:30:05,373 INFO L93 Difference]: Finished difference Result 326 states and 455 transitions. [2021-11-12 22:30:05,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:30:05,376 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 59 [2021-11-12 22:30:05,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:30:05,378 INFO L225 Difference]: With dead ends: 326 [2021-11-12 22:30:05,378 INFO L226 Difference]: Without dead ends: 188 [2021-11-12 22:30:05,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:30:05,380 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 77 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3179.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 732 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.93ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 4 IncrementalHoareTripleChecker+Unchecked, 3362.33ms IncrementalHoareTripleChecker+Time [2021-11-12 22:30:05,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 732 Invalid, 102 Unknown, 0 Unchecked, 4.93ms Time], IncrementalHoareTripleChecker [3 Valid, 94 Invalid, 1 Unknown, 4 Unchecked, 3362.33ms Time] [2021-11-12 22:30:05,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-11-12 22:30:05,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 168. [2021-11-12 22:30:05,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 117 states have (on average 1.2393162393162394) internal successors, (145), 119 states have internal predecessors, (145), 37 states have call successors, (37), 12 states have call predecessors, (37), 13 states have return successors, (45), 36 states have call predecessors, (45), 36 states have call successors, (45) [2021-11-12 22:30:05,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 227 transitions. [2021-11-12 22:30:05,401 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 227 transitions. Word has length 59 [2021-11-12 22:30:05,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:30:05,401 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 227 transitions. [2021-11-12 22:30:05,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 22:30:05,402 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 227 transitions. [2021-11-12 22:30:05,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-12 22:30:05,404 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:30:05,404 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:30:05,448 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-12 22:30:05,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:30:05,619 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:30:05,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:30:05,620 INFO L85 PathProgramCache]: Analyzing trace with hash 918436165, now seen corresponding path program 1 times [2021-11-12 22:30:05,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:30:05,623 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1820125491] [2021-11-12 22:30:05,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:30:05,624 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:30:05,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:30:05,625 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:30:05,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 22:30:09,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:30:09,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 1802 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-12 22:30:09,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:30:12,095 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:30:12,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:30:14,391 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:30:14,391 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:30:14,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1820125491] [2021-11-12 22:30:14,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1820125491] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:30:14,391 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:30:14,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12, 12] imperfect sequences [] total 19 [2021-11-12 22:30:14,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146873433] [2021-11-12 22:30:14,392 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:30:14,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-12 22:30:14,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:30:14,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-12 22:30:14,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-11-12 22:30:14,393 INFO L87 Difference]: Start difference. First operand 168 states and 227 transitions. Second operand has 19 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 3 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-12 22:30:16,648 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.25s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:30:23,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:30:23,073 INFO L93 Difference]: Finished difference Result 335 states and 469 transitions. [2021-11-12 22:30:23,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-12 22:30:23,076 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 3 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 59 [2021-11-12 22:30:23,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:30:23,078 INFO L225 Difference]: With dead ends: 335 [2021-11-12 22:30:23,079 INFO L226 Difference]: Without dead ends: 187 [2021-11-12 22:30:23,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=151, Invalid=841, Unknown=0, NotChecked=0, Total=992 [2021-11-12 22:30:23,082 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 74 mSDsluCounter, 2367 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4248.34ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 2552 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.33ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 182 IncrementalHoareTripleChecker+Unchecked, 4531.76ms IncrementalHoareTripleChecker+Time [2021-11-12 22:30:23,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 2552 Invalid, 530 Unknown, 0 Unchecked, 12.33ms Time], IncrementalHoareTripleChecker [6 Valid, 341 Invalid, 1 Unknown, 182 Unchecked, 4531.76ms Time] [2021-11-12 22:30:23,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-11-12 22:30:23,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 169. [2021-11-12 22:30:23,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 118 states have (on average 1.2203389830508475) internal successors, (144), 120 states have internal predecessors, (144), 37 states have call successors, (37), 12 states have call predecessors, (37), 13 states have return successors, (45), 36 states have call predecessors, (45), 36 states have call successors, (45) [2021-11-12 22:30:23,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 226 transitions. [2021-11-12 22:30:23,103 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 226 transitions. Word has length 59 [2021-11-12 22:30:23,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:30:23,103 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 226 transitions. [2021-11-12 22:30:23,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 3 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-12 22:30:23,104 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 226 transitions. [2021-11-12 22:30:23,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-12 22:30:23,106 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:30:23,106 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:30:23,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 22:30:23,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:30:23,319 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:30:23,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:30:23,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1679909732, now seen corresponding path program 1 times [2021-11-12 22:30:23,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:30:23,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [141302225] [2021-11-12 22:30:23,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:30:23,325 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:30:23,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:30:23,326 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:30:23,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 22:30:27,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:30:27,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 1807 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:30:27,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:30:27,940 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:30:27,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:30:28,128 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 22:30:28,128 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:30:28,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [141302225] [2021-11-12 22:30:28,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [141302225] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:30:28,128 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:30:28,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-12 22:30:28,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116193205] [2021-11-12 22:30:28,129 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:30:28,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:30:28,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:30:28,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:30:28,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:30:28,131 INFO L87 Difference]: Start difference. First operand 169 states and 226 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 22:30:28,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:30:28,227 INFO L93 Difference]: Finished difference Result 326 states and 445 transitions. [2021-11-12 22:30:28,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:30:28,228 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 61 [2021-11-12 22:30:28,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:30:28,231 INFO L225 Difference]: With dead ends: 326 [2021-11-12 22:30:28,231 INFO L226 Difference]: Without dead ends: 178 [2021-11-12 22:30:28,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:30:28,234 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 34 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 59.44ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 559 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.06ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 65.25ms IncrementalHoareTripleChecker+Time [2021-11-12 22:30:28,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 559 Invalid, 13 Unknown, 0 Unchecked, 2.06ms Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 65.25ms Time] [2021-11-12 22:30:28,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-11-12 22:30:28,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 165. [2021-11-12 22:30:28,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 114 states have (on average 1.2017543859649122) internal successors, (137), 116 states have internal predecessors, (137), 37 states have call successors, (37), 12 states have call predecessors, (37), 13 states have return successors, (45), 36 states have call predecessors, (45), 36 states have call successors, (45) [2021-11-12 22:30:28,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 219 transitions. [2021-11-12 22:30:28,250 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 219 transitions. Word has length 61 [2021-11-12 22:30:28,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:30:28,251 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 219 transitions. [2021-11-12 22:30:28,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 22:30:28,252 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 219 transitions. [2021-11-12 22:30:28,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-12 22:30:28,253 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:30:28,254 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:30:28,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 22:30:28,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:30:28,479 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:30:28,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:30:28,480 INFO L85 PathProgramCache]: Analyzing trace with hash -2074276518, now seen corresponding path program 1 times [2021-11-12 22:30:28,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:30:28,487 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1589819655] [2021-11-12 22:30:28,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:30:28,487 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:30:28,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:30:28,489 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:30:28,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 22:30:32,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:30:33,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 1804 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 22:30:33,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:30:33,217 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 22:30:33,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:30:33,582 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 22:30:33,582 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:30:33,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1589819655] [2021-11-12 22:30:33,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1589819655] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:30:33,583 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:30:33,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-11-12 22:30:33,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121390550] [2021-11-12 22:30:33,583 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:30:33,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 22:30:33,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:30:33,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 22:30:33,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:30:33,584 INFO L87 Difference]: Start difference. First operand 165 states and 219 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 6 states have internal predecessors, (48), 2 states have call successors, (8), 2 states have call predecessors, (8), 5 states have return successors, (9), 5 states have call predecessors, (9), 1 states have call successors, (9) [2021-11-12 22:30:33,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:30:33,655 INFO L93 Difference]: Finished difference Result 240 states and 306 transitions. [2021-11-12 22:30:33,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:30:33,656 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 6 states have internal predecessors, (48), 2 states have call successors, (8), 2 states have call predecessors, (8), 5 states have return successors, (9), 5 states have call predecessors, (9), 1 states have call successors, (9) Word has length 61 [2021-11-12 22:30:33,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:30:33,658 INFO L225 Difference]: With dead ends: 240 [2021-11-12 22:30:33,659 INFO L226 Difference]: Without dead ends: 168 [2021-11-12 22:30:33,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:30:33,660 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 0 mSDsluCounter, 939 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 45.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1129 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.85ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 56.21ms IncrementalHoareTripleChecker+Time [2021-11-12 22:30:33,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1129 Invalid, 20 Unknown, 0 Unchecked, 2.85ms Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 56.21ms Time] [2021-11-12 22:30:33,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-11-12 22:30:33,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2021-11-12 22:30:33,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 116 states have (on average 1.1982758620689655) internal successors, (139), 118 states have internal predecessors, (139), 37 states have call successors, (37), 12 states have call predecessors, (37), 14 states have return successors, (46), 37 states have call predecessors, (46), 36 states have call successors, (46) [2021-11-12 22:30:33,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 222 transitions. [2021-11-12 22:30:33,675 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 222 transitions. Word has length 61 [2021-11-12 22:30:33,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:30:33,676 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 222 transitions. [2021-11-12 22:30:33,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 6 states have internal predecessors, (48), 2 states have call successors, (8), 2 states have call predecessors, (8), 5 states have return successors, (9), 5 states have call predecessors, (9), 1 states have call successors, (9) [2021-11-12 22:30:33,676 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 222 transitions. [2021-11-12 22:30:33,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-12 22:30:33,678 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:30:33,678 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:30:33,733 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-11-12 22:30:33,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:30:33,893 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:30:33,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:30:33,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1259864245, now seen corresponding path program 1 times [2021-11-12 22:30:33,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:30:33,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [923700684] [2021-11-12 22:30:33,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:30:33,897 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:30:33,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:30:33,898 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:30:33,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 22:30:38,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:30:38,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 1816 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:30:38,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:30:38,730 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 22:30:38,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:30:39,499 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 22:30:39,499 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:30:39,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [923700684] [2021-11-12 22:30:39,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [923700684] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:30:39,500 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:30:39,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-12 22:30:39,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254952546] [2021-11-12 22:30:39,500 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:30:39,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:30:39,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:30:39,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:30:39,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:30:39,502 INFO L87 Difference]: Start difference. First operand 168 states and 222 transitions. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 6 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2021-11-12 22:30:40,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:30:40,452 INFO L93 Difference]: Finished difference Result 309 states and 405 transitions. [2021-11-12 22:30:40,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:30:40,453 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 6 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) Word has length 69 [2021-11-12 22:30:40,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:30:40,456 INFO L225 Difference]: With dead ends: 309 [2021-11-12 22:30:40,456 INFO L226 Difference]: Without dead ends: 226 [2021-11-12 22:30:40,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:30:40,458 INFO L933 BasicCegarLoop]: 208 mSDtfsCounter, 131 mSDsluCounter, 1013 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 773.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 1221 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.69ms SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 885.88ms IncrementalHoareTripleChecker+Time [2021-11-12 22:30:40,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 1221 Invalid, 177 Unknown, 0 Unchecked, 5.69ms Time], IncrementalHoareTripleChecker [31 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 885.88ms Time] [2021-11-12 22:30:40,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-11-12 22:30:40,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 221. [2021-11-12 22:30:40,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 156 states have (on average 1.2243589743589745) internal successors, (191), 160 states have internal predecessors, (191), 49 states have call successors, (49), 13 states have call predecessors, (49), 15 states have return successors, (58), 47 states have call predecessors, (58), 45 states have call successors, (58) [2021-11-12 22:30:40,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 298 transitions. [2021-11-12 22:30:40,478 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 298 transitions. Word has length 69 [2021-11-12 22:30:40,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:30:40,479 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 298 transitions. [2021-11-12 22:30:40,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 6 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2021-11-12 22:30:40,480 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 298 transitions. [2021-11-12 22:30:40,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-12 22:30:40,481 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:30:40,481 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:30:40,543 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-11-12 22:30:40,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:30:40,707 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:30:40,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:30:40,708 INFO L85 PathProgramCache]: Analyzing trace with hash -696464625, now seen corresponding path program 1 times [2021-11-12 22:30:40,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:30:40,713 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1959966143] [2021-11-12 22:30:40,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:30:40,714 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:30:40,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:30:40,716 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:30:40,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 22:30:44,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:30:44,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 1815 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:30:44,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:30:45,322 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 22:30:45,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:30:45,702 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 22:30:45,702 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:30:45,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1959966143] [2021-11-12 22:30:45,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1959966143] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:30:45,703 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:30:45,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 7 [2021-11-12 22:30:45,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833221794] [2021-11-12 22:30:45,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:30:45,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:30:45,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:30:45,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:30:45,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:30:45,704 INFO L87 Difference]: Start difference. First operand 221 states and 298 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 states have internal predecessors, (50), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-12 22:30:46,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:30:46,343 INFO L93 Difference]: Finished difference Result 263 states and 343 transitions. [2021-11-12 22:30:46,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:30:46,343 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 states have internal predecessors, (50), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 69 [2021-11-12 22:30:46,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:30:46,346 INFO L225 Difference]: With dead ends: 263 [2021-11-12 22:30:46,346 INFO L226 Difference]: Without dead ends: 165 [2021-11-12 22:30:46,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:30:46,348 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 96 mSDsluCounter, 744 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 532.30ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 923 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.27ms SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 589.18ms IncrementalHoareTripleChecker+Time [2021-11-12 22:30:46,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 923 Invalid, 117 Unknown, 0 Unchecked, 3.27ms Time], IncrementalHoareTripleChecker [33 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 589.18ms Time] [2021-11-12 22:30:46,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-11-12 22:30:46,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2021-11-12 22:30:46,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 114 states have (on average 1.1929824561403508) internal successors, (136), 115 states have internal predecessors, (136), 37 states have call successors, (37), 12 states have call predecessors, (37), 13 states have return successors, (42), 37 states have call predecessors, (42), 36 states have call successors, (42) [2021-11-12 22:30:46,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 215 transitions. [2021-11-12 22:30:46,362 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 215 transitions. Word has length 69 [2021-11-12 22:30:46,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:30:46,363 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 215 transitions. [2021-11-12 22:30:46,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 states have internal predecessors, (50), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-12 22:30:46,363 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 215 transitions. [2021-11-12 22:30:46,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-12 22:30:46,364 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:30:46,365 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:30:46,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 22:30:46,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:30:46,587 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:30:46,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:30:46,587 INFO L85 PathProgramCache]: Analyzing trace with hash -759101960, now seen corresponding path program 1 times [2021-11-12 22:30:46,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:30:46,591 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [782953601] [2021-11-12 22:30:46,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:30:46,591 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:30:46,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:30:46,592 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:30:46,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 22:30:50,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:30:51,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 1827 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-12 22:30:51,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:30:53,884 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:30:53,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:31:10,166 WARN L227 SmtUtils]: Spent 12.51s on a formula simplification. DAG size of input: 526 DAG size of output: 272 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-12 22:31:10,169 INFO L354 Elim1Store]: treesize reduction 897, result has 45.1 percent of original size [2021-11-12 22:31:10,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 132 treesize of output 771 [2021-11-12 22:40:05,764 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 22:40:05,764 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:40:05,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [782953601] [2021-11-12 22:40:05,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [782953601] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:40:05,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [566331797] [2021-11-12 22:40:05,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:40:05,765 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:40:05,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:40:05,768 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:40:05,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-12 22:40:10,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:40:10,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 1827 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-12 22:40:10,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:40:10,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-12 22:40:14,617 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:40:14,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:40:17,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 34 [2021-11-12 22:40:18,050 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 22:40:18,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [566331797] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:40:18,050 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:40:18,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12, 11] imperfect sequences [12, 10] total 36 [2021-11-12 22:40:18,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864687738] [2021-11-12 22:40:18,051 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:40:18,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-12 22:40:18,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:40:18,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-12 22:40:18,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1139, Unknown=0, NotChecked=0, Total=1260 [2021-11-12 22:40:18,053 INFO L87 Difference]: Start difference. First operand 165 states and 215 transitions. Second operand has 20 states, 20 states have (on average 4.7) internal successors, (94), 18 states have internal predecessors, (94), 8 states have call successors, (16), 5 states have call predecessors, (16), 7 states have return successors, (15), 10 states have call predecessors, (15), 7 states have call successors, (15) [2021-11-12 22:40:20,318 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.26s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:40:22,326 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:40:24,341 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:40:26,354 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:40:28,367 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:40:30,380 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:40:39,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:40:39,184 INFO L93 Difference]: Finished difference Result 302 states and 394 transitions. [2021-11-12 22:40:39,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-12 22:40:39,186 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.7) internal successors, (94), 18 states have internal predecessors, (94), 8 states have call successors, (16), 5 states have call predecessors, (16), 7 states have return successors, (15), 10 states have call predecessors, (15), 7 states have call successors, (15) Word has length 73 [2021-11-12 22:40:39,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:40:39,188 INFO L225 Difference]: With dead ends: 302 [2021-11-12 22:40:39,189 INFO L226 Difference]: Without dead ends: 271 [2021-11-12 22:40:39,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 259 SyntacticMatches, 6 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=292, Invalid=2258, Unknown=0, NotChecked=0, Total=2550 [2021-11-12 22:40:39,191 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 193 mSDsluCounter, 1080 mSDsCounter, 0 mSdLazyCounter, 1167 mSolverCounterSat, 59 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17005.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 1266 SdHoareTripleChecker+Invalid, 1975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 20.17ms SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1167 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 743 IncrementalHoareTripleChecker+Unchecked, 17664.17ms IncrementalHoareTripleChecker+Time [2021-11-12 22:40:39,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 1266 Invalid, 1975 Unknown, 0 Unchecked, 20.17ms Time], IncrementalHoareTripleChecker [59 Valid, 1167 Invalid, 6 Unknown, 743 Unchecked, 17664.17ms Time] [2021-11-12 22:40:39,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-11-12 22:40:39,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 243. [2021-11-12 22:40:39,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 172 states have (on average 1.180232558139535) internal successors, (203), 175 states have internal predecessors, (203), 50 states have call successors, (50), 14 states have call predecessors, (50), 20 states have return successors, (65), 53 states have call predecessors, (65), 49 states have call successors, (65) [2021-11-12 22:40:39,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 318 transitions. [2021-11-12 22:40:39,216 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 318 transitions. Word has length 73 [2021-11-12 22:40:39,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:40:39,216 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 318 transitions. [2021-11-12 22:40:39,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.7) internal successors, (94), 18 states have internal predecessors, (94), 8 states have call successors, (16), 5 states have call predecessors, (16), 7 states have return successors, (15), 10 states have call predecessors, (15), 7 states have call successors, (15) [2021-11-12 22:40:39,217 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 318 transitions. [2021-11-12 22:40:39,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-12 22:40:39,219 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:40:39,219 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:40:39,247 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (13)] Ended with exit code 0 [2021-11-12 22:40:39,476 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 22:40:39,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:40:39,634 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:40:39,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:40:39,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1078494016, now seen corresponding path program 1 times [2021-11-12 22:40:39,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:40:39,638 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [520460437] [2021-11-12 22:40:39,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:40:39,638 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:40:39,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:40:39,639 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:40:39,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99666791-a717-40b9-94ab-462621106118/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 22:40:43,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:40:43,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 1829 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-12 22:40:43,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:40:46,155 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:40:46,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:41:00,729 WARN L227 SmtUtils]: Spent 9.94s on a formula simplification. DAG size of input: 526 DAG size of output: 272 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-12 22:41:00,731 INFO L354 Elim1Store]: treesize reduction 897, result has 45.1 percent of original size [2021-11-12 22:41:00,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 132 treesize of output 771