./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_ring_buffer_init_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_ring_buffer_init_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8 --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 ccc87605c4556c18c172bc882c4bc58637928d3f75ad69e0a339ead8d6093a78 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:00:21,033 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:00:21,036 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:00:21,075 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:00:21,076 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:00:21,078 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:00:21,081 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:00:21,084 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:00:21,087 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:00:21,089 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:00:21,091 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:00:21,093 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:00:21,094 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:00:21,096 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:00:21,098 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:00:21,101 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:00:21,102 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:00:21,104 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:00:21,107 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:00:21,111 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:00:21,113 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:00:21,116 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:00:21,118 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:00:21,119 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:00:21,124 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:00:21,125 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:00:21,126 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:00:21,127 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:00:21,128 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:00:21,130 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:00:21,131 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:00:21,132 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:00:21,133 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:00:21,135 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:00:21,137 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:00:21,138 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:00:21,139 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:00:21,140 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:00:21,140 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:00:21,141 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:00:21,142 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:00:21,143 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-07 02:00:21,176 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:00:21,177 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:00:21,178 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:00:21,178 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:00:21,179 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:00:21,179 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:00:21,179 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:00:21,179 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:00:21,180 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:00:21,180 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:00:21,180 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:00:21,180 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:00:21,181 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:00:21,181 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:00:21,181 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:00:21,182 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:00:21,182 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:00:21,183 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:00:21,183 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:00:21,183 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:00:21,183 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:00:21,184 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:00:21,184 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:00:21,184 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:00:21,185 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:00:21,185 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:00:21,185 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:00:21,185 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:00:21,186 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:00:21,186 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:00:21,186 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:00:21,186 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:00:21,187 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:00:21,187 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:00:21,187 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:00:21,187 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:00:21,188 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_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ccc87605c4556c18c172bc882c4bc58637928d3f75ad69e0a339ead8d6093a78 [2021-11-07 02:00:21,495 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:00:21,543 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:00:21,547 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:00:21,549 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:00:21,550 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:00:21,551 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/aws-c-common/aws_ring_buffer_init_harness.i [2021-11-07 02:00:21,642 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/data/fc4aea83c/0b9041b0a65e47e3b5ffd0957da9fce3/FLAGa4878f517 [2021-11-07 02:00:22,678 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:00:22,681 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/sv-benchmarks/c/aws-c-common/aws_ring_buffer_init_harness.i [2021-11-07 02:00:22,744 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/data/fc4aea83c/0b9041b0a65e47e3b5ffd0957da9fce3/FLAGa4878f517 [2021-11-07 02:00:23,090 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/data/fc4aea83c/0b9041b0a65e47e3b5ffd0957da9fce3 [2021-11-07 02:00:23,093 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:00:23,094 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:00:23,095 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:00:23,095 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:00:23,099 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:00:23,100 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:00:23" (1/1) ... [2021-11-07 02:00:23,101 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@123d7311 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:00:23, skipping insertion in model container [2021-11-07 02:00:23,102 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:00:23" (1/1) ... [2021-11-07 02:00:23,110 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:00:23,239 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:00:23,599 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/sv-benchmarks/c/aws-c-common/aws_ring_buffer_init_harness.i[4494,4507] [2021-11-07 02:00:23,605 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_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/sv-benchmarks/c/aws-c-common/aws_ring_buffer_init_harness.i[4554,4567] [2021-11-07 02:00:23,627 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-07 02:00:23,632 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-07 02:00:24,452 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:00:24,453 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:00:24,454 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:00:24,454 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:00:24,456 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:00:24,471 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:00:24,472 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:00:24,474 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:00:24,474 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:00:24,476 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:00:24,477 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:00:24,478 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:00:24,478 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:00:24,864 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-07 02:00:24,865 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-07 02:00:24,867 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-07 02:00:24,868 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-07 02:00:24,869 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-07 02:00:24,870 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-07 02:00:24,870 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-07 02:00:24,871 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-07 02:00:24,872 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-07 02:00:24,872 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-07 02:00:25,035 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-07 02:00:25,139 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:00:25,211 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) [2021-11-07 02:00:25,212 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@654b5d35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:00:25, skipping insertion in model container [2021-11-07 02:00:25,212 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:00:25,212 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 02:00:25,215 INFO L168 Benchmark]: Toolchain (without parser) took 2119.46 ms. Allocated memory was 90.2 MB in the beginning and 115.3 MB in the end (delta: 25.2 MB). Free memory was 64.7 MB in the beginning and 81.1 MB in the end (delta: -16.3 MB). Peak memory consumption was 39.9 MB. Max. memory is 16.1 GB. [2021-11-07 02:00:25,215 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 90.2 MB. Free memory was 69.4 MB in the beginning and 69.3 MB in the end (delta: 42.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 02:00:25,217 INFO L168 Benchmark]: CACSL2BoogieTranslator took 2117.47 ms. Allocated memory was 90.2 MB in the beginning and 115.3 MB in the end (delta: 25.2 MB). Free memory was 64.5 MB in the beginning and 81.1 MB in the end (delta: -16.5 MB). Peak memory consumption was 39.9 MB. Max. memory is 16.1 GB. [2021-11-07 02:00:25,219 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 90.2 MB. Free memory was 69.4 MB in the beginning and 69.3 MB in the end (delta: 42.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 2117.47 ms. Allocated memory was 90.2 MB in the beginning and 115.3 MB in the end (delta: 25.2 MB). Free memory was 64.5 MB in the beginning and 81.1 MB in the end (delta: -16.5 MB). Peak memory consumption was 39.9 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 7039]: 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_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_ring_buffer_init_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8 --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 ccc87605c4556c18c172bc882c4bc58637928d3f75ad69e0a339ead8d6093a78 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:00:27,402 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:00:27,406 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:00:27,463 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:00:27,463 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:00:27,469 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:00:27,470 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:00:27,475 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:00:27,479 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:00:27,489 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:00:27,491 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:00:27,492 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:00:27,493 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:00:27,496 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:00:27,498 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:00:27,503 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:00:27,505 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:00:27,506 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:00:27,515 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:00:27,517 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:00:27,519 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:00:27,520 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:00:27,521 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:00:27,522 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:00:27,526 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:00:27,526 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:00:27,526 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:00:27,527 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:00:27,528 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:00:27,529 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:00:27,529 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:00:27,530 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:00:27,531 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:00:27,532 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:00:27,533 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:00:27,533 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:00:27,534 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:00:27,534 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:00:27,534 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:00:27,535 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:00:27,536 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:00:27,539 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-07 02:00:27,584 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:00:27,584 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:00:27,585 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:00:27,586 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:00:27,586 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:00:27,586 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:00:27,586 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:00:27,586 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:00:27,587 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:00:27,589 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:00:27,590 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:00:27,590 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:00:27,590 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:00:27,590 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:00:27,590 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:00:27,591 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 02:00:27,591 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 02:00:27,591 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:00:27,591 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:00:27,591 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:00:27,592 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:00:27,592 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 02:00:27,592 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:00:27,592 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:00:27,592 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:00:27,593 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:00:27,593 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:00:27,593 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 02:00:27,593 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 02:00:27,593 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:00:27,594 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:00:27,594 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:00:27,594 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_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ccc87605c4556c18c172bc882c4bc58637928d3f75ad69e0a339ead8d6093a78 [2021-11-07 02:00:27,946 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:00:27,970 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:00:27,973 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:00:27,974 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:00:27,975 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:00:27,976 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/aws-c-common/aws_ring_buffer_init_harness.i [2021-11-07 02:00:28,066 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/data/37b252719/9f5867d82764455fa9e2c1928590f761/FLAGb4c9d67ea [2021-11-07 02:00:29,028 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:00:29,028 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/sv-benchmarks/c/aws-c-common/aws_ring_buffer_init_harness.i [2021-11-07 02:00:29,081 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/data/37b252719/9f5867d82764455fa9e2c1928590f761/FLAGb4c9d67ea [2021-11-07 02:00:29,540 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/data/37b252719/9f5867d82764455fa9e2c1928590f761 [2021-11-07 02:00:29,543 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:00:29,544 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:00:29,556 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:00:29,556 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:00:29,560 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:00:29,560 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:00:29" (1/1) ... [2021-11-07 02:00:29,562 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10f5baaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:00:29, skipping insertion in model container [2021-11-07 02:00:29,562 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:00:29" (1/1) ... [2021-11-07 02:00:29,569 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:00:29,730 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:00:30,047 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_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/sv-benchmarks/c/aws-c-common/aws_ring_buffer_init_harness.i[4494,4507] [2021-11-07 02:00:30,054 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_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/sv-benchmarks/c/aws-c-common/aws_ring_buffer_init_harness.i[4554,4567] [2021-11-07 02:00:30,078 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-07 02:00:30,085 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-07 02:00:31,020 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:00:31,021 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:00:31,022 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:00:31,022 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:00:31,024 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:00:31,040 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:00:31,041 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:00:31,043 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:00:31,044 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:00:31,046 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:00:31,047 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:00:31,048 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:00:31,049 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:00:31,419 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-07 02:00:31,420 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-07 02:00:31,421 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-07 02:00:31,423 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-07 02:00:31,424 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-07 02:00:31,425 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-07 02:00:31,426 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-07 02:00:31,427 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-07 02:00:31,427 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-07 02:00:31,428 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-07 02:00:31,572 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-07 02:00:31,688 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:00:31,742 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 02:00:31,797 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:00:31,803 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_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/sv-benchmarks/c/aws-c-common/aws_ring_buffer_init_harness.i[4494,4507] [2021-11-07 02:00:31,804 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_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/sv-benchmarks/c/aws-c-common/aws_ring_buffer_init_harness.i[4554,4567] [2021-11-07 02:00:31,807 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-07 02:00:31,808 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-07 02:00:31,885 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:00:31,898 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:00:31,899 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:00:31,899 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:00:31,900 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:00:31,907 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:00:31,916 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:00:31,917 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:00:31,917 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:00:31,918 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:00:31,924 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:00:31,924 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:00:31,924 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:00:31,994 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-07 02:00:31,995 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-07 02:00:31,995 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-07 02:00:31,996 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-07 02:00:31,997 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-07 02:00:31,998 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-07 02:00:31,998 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-07 02:00:31,999 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-07 02:00:31,999 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-07 02:00:32,000 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-07 02:00:32,021 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-07 02:00:32,065 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:00:32,104 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:00:32,142 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_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/sv-benchmarks/c/aws-c-common/aws_ring_buffer_init_harness.i[4494,4507] [2021-11-07 02:00:32,142 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_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/sv-benchmarks/c/aws-c-common/aws_ring_buffer_init_harness.i[4554,4567] [2021-11-07 02:00:32,144 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-07 02:00:32,146 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-07 02:00:32,202 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:00:32,203 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:00:32,203 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:00:32,204 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:00:32,204 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:00:32,216 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:00:32,217 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:00:32,218 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:00:32,218 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:00:32,219 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:00:32,221 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:00:32,221 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:00:32,222 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:00:32,258 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-07 02:00:32,258 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-07 02:00:32,260 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-07 02:00:32,260 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-07 02:00:32,261 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-07 02:00:32,262 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-07 02:00:32,262 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-07 02:00:32,263 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-07 02:00:32,263 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-07 02:00:32,264 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-07 02:00:32,286 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-07 02:00:32,349 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:00:32,675 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:00:32,676 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:00:32 WrapperNode [2021-11-07 02:00:32,676 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:00:32,677 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:00:32,678 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:00:32,678 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:00:32,685 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:00:32" (1/1) ... [2021-11-07 02:00:32,784 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:00:32" (1/1) ... [2021-11-07 02:00:32,915 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:00:32,916 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:00:32,916 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:00:32,916 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:00:32,945 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:00:32" (1/1) ... [2021-11-07 02:00:32,946 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:00:32" (1/1) ... [2021-11-07 02:00:32,955 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:00:32" (1/1) ... [2021-11-07 02:00:32,956 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:00:32" (1/1) ... [2021-11-07 02:00:33,000 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:00:32" (1/1) ... [2021-11-07 02:00:33,006 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:00:32" (1/1) ... [2021-11-07 02:00:33,018 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:00:32" (1/1) ... [2021-11-07 02:00:33,032 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:00:33,033 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:00:33,033 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:00:33,033 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:00:33,034 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:00:32" (1/1) ... [2021-11-07 02:00:33,040 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:00:33,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:00:33,063 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:00:33,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:00:33,141 INFO L130 BoogieDeclarations]: Found specification of procedure __atomic_load_n [2021-11-07 02:00:33,142 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 02:00:33,142 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 02:00:33,142 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-07 02:00:33,143 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 02:00:33,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 02:00:33,143 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:00:33,143 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:00:33,143 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:00:33,144 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 02:00:33,144 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-07 02:00:46,414 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:00:46,414 INFO L299 CfgBuilder]: Removed 100 assume(true) statements. [2021-11-07 02:00:46,416 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:00:46 BoogieIcfgContainer [2021-11-07 02:00:46,416 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:00:46,419 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:00:46,419 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:00:46,422 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:00:46,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:00:29" (1/3) ... [2021-11-07 02:00:46,423 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77ec9d9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:00:46, skipping insertion in model container [2021-11-07 02:00:46,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:00:32" (2/3) ... [2021-11-07 02:00:46,423 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77ec9d9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:00:46, skipping insertion in model container [2021-11-07 02:00:46,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:00:46" (3/3) ... [2021-11-07 02:00:46,425 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_ring_buffer_init_harness.i [2021-11-07 02:00:46,430 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:00:46,430 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2021-11-07 02:00:46,479 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:00:46,485 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 [2021-11-07 02:00:46,485 INFO L340 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2021-11-07 02:00:46,502 INFO L276 IsEmpty]: Start isEmpty. Operand has 137 states, 128 states have (on average 1.484375) internal successors, (190), 136 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:46,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-07 02:00:46,508 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:00:46,509 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:00:46,510 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2021-11-07 02:00:46,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:00:46,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1522518118, now seen corresponding path program 1 times [2021-11-07 02:00:46,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:00:46,534 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [167070549] [2021-11-07 02:00:46,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:00:46,536 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:00:46,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:00:46,539 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:00:46,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 02:00:50,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:00:50,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 1492 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 02:00:50,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:00:50,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:00:50,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:00:50,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:00:50,612 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:00:50,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [167070549] [2021-11-07 02:00:50,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [167070549] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:00:50,613 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:00:50,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:00:50,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989795532] [2021-11-07 02:00:50,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 02:00:50,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:00:50,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 02:00:50,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:00:50,634 INFO L87 Difference]: Start difference. First operand has 137 states, 128 states have (on average 1.484375) internal successors, (190), 136 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 17.5) internal successors, (35), 2 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:50,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:00:50,662 INFO L93 Difference]: Finished difference Result 270 states and 375 transitions. [2021-11-07 02:00:50,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 02:00:50,663 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 17.5) internal successors, (35), 2 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-07 02:00:50,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:00:50,673 INFO L225 Difference]: With dead ends: 270 [2021-11-07 02:00:50,674 INFO L226 Difference]: Without dead ends: 131 [2021-11-07 02:00:50,677 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:00:50,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-11-07 02:00:50,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2021-11-07 02:00:50,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 123 states have (on average 1.3495934959349594) internal successors, (166), 130 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:50,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 166 transitions. [2021-11-07 02:00:50,718 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 166 transitions. Word has length 35 [2021-11-07 02:00:50,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:00:50,718 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 166 transitions. [2021-11-07 02:00:50,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 17.5) internal successors, (35), 2 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:50,719 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 166 transitions. [2021-11-07 02:00:50,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-07 02:00:50,721 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:00:50,721 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:00:50,761 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-07 02:00:50,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:00:50,934 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2021-11-07 02:00:50,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:00:50,935 INFO L85 PathProgramCache]: Analyzing trace with hash 547716234, now seen corresponding path program 1 times [2021-11-07 02:00:50,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:00:50,941 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1136801145] [2021-11-07 02:00:50,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:00:50,941 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:00:50,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:00:50,943 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:00:50,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 02:00:54,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:00:54,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 1500 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:00:54,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:00:54,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:00:54,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:00:54,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:00:54,922 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:00:54,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1136801145] [2021-11-07 02:00:54,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1136801145] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:00:54,922 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:00:54,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:00:54,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412635059] [2021-11-07 02:00:54,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:00:54,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:00:54,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:00:54,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:00:54,924 INFO L87 Difference]: Start difference. First operand 131 states and 166 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:54,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:00:54,970 INFO L93 Difference]: Finished difference Result 252 states and 323 transitions. [2021-11-07 02:00:54,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:00:54,971 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-07 02:00:54,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:00:54,973 INFO L225 Difference]: With dead ends: 252 [2021-11-07 02:00:54,973 INFO L226 Difference]: Without dead ends: 133 [2021-11-07 02:00:54,974 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:00:54,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-11-07 02:00:54,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2021-11-07 02:00:54,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 125 states have (on average 1.344) internal successors, (168), 132 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:54,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 168 transitions. [2021-11-07 02:00:54,989 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 168 transitions. Word has length 38 [2021-11-07 02:00:54,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:00:54,989 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 168 transitions. [2021-11-07 02:00:54,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:54,990 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 168 transitions. [2021-11-07 02:00:54,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-07 02:00:54,991 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:00:54,992 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 02:00:55,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 02:00:55,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:00:55,197 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2021-11-07 02:00:55,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:00:55,198 INFO L85 PathProgramCache]: Analyzing trace with hash 689256106, now seen corresponding path program 1 times [2021-11-07 02:00:55,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:00:55,205 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1801152865] [2021-11-07 02:00:55,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:00:55,206 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:00:55,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:00:55,207 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:00:55,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 02:00:58,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:00:58,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 1510 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:00:58,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:00:59,269 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:00:59,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:00:59,699 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:00:59,699 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:00:59,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1801152865] [2021-11-07 02:00:59,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1801152865] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:00:59,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1856724618] [2021-11-07 02:00:59,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:00:59,700 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:00:59,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:00:59,703 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:00:59,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-07 02:01:01,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:01,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 1510 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:01:01,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:01:01,566 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:01:01,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:01:01,749 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:01:01,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1856724618] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:01:01,749 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:01:01,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 12 [2021-11-07 02:01:01,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012925583] [2021-11-07 02:01:01,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:01:01,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:01:01,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:01:01,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-07 02:01:01,752 INFO L87 Difference]: Start difference. First operand 133 states and 168 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:01,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:01:01,822 INFO L93 Difference]: Finished difference Result 185 states and 235 transitions. [2021-11-07 02:01:01,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:01:01,824 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-07 02:01:01,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:01:01,826 INFO L225 Difference]: With dead ends: 185 [2021-11-07 02:01:01,826 INFO L226 Difference]: Without dead ends: 133 [2021-11-07 02:01:01,826 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-11-07 02:01:01,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-11-07 02:01:01,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2021-11-07 02:01:01,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 125 states have (on average 1.336) internal successors, (167), 132 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:01,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 167 transitions. [2021-11-07 02:01:01,837 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 167 transitions. Word has length 40 [2021-11-07 02:01:01,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:01:01,837 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 167 transitions. [2021-11-07 02:01:01,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:01,838 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 167 transitions. [2021-11-07 02:01:01,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-07 02:01:01,839 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:01:01,839 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 02:01:01,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 02:01:02,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-11-07 02:01:02,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:01:02,249 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2021-11-07 02:01:02,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:01:02,251 INFO L85 PathProgramCache]: Analyzing trace with hash 291032921, now seen corresponding path program 1 times [2021-11-07 02:01:02,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:01:02,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1341902525] [2021-11-07 02:01:02,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:02,253 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:01:02,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:01:02,254 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:01:02,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 02:01:05,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:05,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 1536 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:01:05,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:01:06,158 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:01:06,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:01:06,465 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:01:06,466 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:01:06,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1341902525] [2021-11-07 02:01:06,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1341902525] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:01:06,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [810459722] [2021-11-07 02:01:06,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:06,466 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:01:06,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:01:06,467 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:01:06,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-07 02:01:07,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:07,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 1536 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:01:07,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:01:08,198 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:01:08,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:01:08,293 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:01:08,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [810459722] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:01:08,294 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:01:08,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 10 [2021-11-07 02:01:08,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307021310] [2021-11-07 02:01:08,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:01:08,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:01:08,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:01:08,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:01:08,296 INFO L87 Difference]: Start difference. First operand 133 states and 167 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:08,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:01:08,486 INFO L93 Difference]: Finished difference Result 207 states and 267 transitions. [2021-11-07 02:01:08,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:01:08,487 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-07 02:01:08,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:01:08,488 INFO L225 Difference]: With dead ends: 207 [2021-11-07 02:01:08,488 INFO L226 Difference]: Without dead ends: 117 [2021-11-07 02:01:08,489 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-07 02:01:08,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-11-07 02:01:08,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2021-11-07 02:01:08,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 113 states have (on average 1.3008849557522124) internal successors, (147), 116 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:08,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 147 transitions. [2021-11-07 02:01:08,512 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 147 transitions. Word has length 40 [2021-11-07 02:01:08,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:01:08,513 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 147 transitions. [2021-11-07 02:01:08,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:08,513 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 147 transitions. [2021-11-07 02:01:08,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-07 02:01:08,518 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:01:08,518 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:01:08,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-11-07 02:01:08,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 02:01:08,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:01:08,933 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2021-11-07 02:01:08,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:01:08,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1162440559, now seen corresponding path program 1 times [2021-11-07 02:01:08,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:01:08,936 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1524571413] [2021-11-07 02:01:08,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:08,936 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:01:08,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:01:08,937 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:01:08,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 02:01:12,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:12,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 1602 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:01:12,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:01:13,096 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:01:13,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:01:13,592 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:01:13,592 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:01:13,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1524571413] [2021-11-07 02:01:13,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1524571413] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:01:13,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [394430299] [2021-11-07 02:01:13,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:13,593 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:01:13,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:01:13,598 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:01:13,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-07 02:01:15,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:15,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 1602 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:01:15,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:01:15,444 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:01:15,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:01:15,552 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:01:15,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [394430299] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:01:15,552 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:01:15,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 10 [2021-11-07 02:01:15,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239799700] [2021-11-07 02:01:15,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:01:15,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:01:15,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:01:15,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:01:15,554 INFO L87 Difference]: Start difference. First operand 117 states and 147 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:15,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:01:15,670 INFO L93 Difference]: Finished difference Result 175 states and 220 transitions. [2021-11-07 02:01:15,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:01:15,675 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-07 02:01:15,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:01:15,676 INFO L225 Difference]: With dead ends: 175 [2021-11-07 02:01:15,677 INFO L226 Difference]: Without dead ends: 125 [2021-11-07 02:01:15,677 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-07 02:01:15,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-11-07 02:01:15,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 121. [2021-11-07 02:01:15,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 117 states have (on average 1.2905982905982907) internal successors, (151), 120 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:15,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 151 transitions. [2021-11-07 02:01:15,686 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 151 transitions. Word has length 56 [2021-11-07 02:01:15,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:01:15,687 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 151 transitions. [2021-11-07 02:01:15,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:15,687 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 151 transitions. [2021-11-07 02:01:15,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-07 02:01:15,688 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:01:15,688 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:01:15,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 02:01:15,915 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (9)] Ended with exit code 0 [2021-11-07 02:01:16,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:01:16,111 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2021-11-07 02:01:16,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:01:16,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1164287601, now seen corresponding path program 1 times [2021-11-07 02:01:16,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:01:16,114 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [519437733] [2021-11-07 02:01:16,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:16,114 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:01:16,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:01:16,115 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:01:16,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 02:01:19,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:19,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 1599 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:01:19,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:01:20,090 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:01:20,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:01:20,467 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:01:20,467 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:01:20,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [519437733] [2021-11-07 02:01:20,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [519437733] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:01:20,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1624557901] [2021-11-07 02:01:20,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:20,468 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:01:20,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:01:20,469 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:01:20,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-07 02:01:21,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:21,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 1599 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:01:21,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:01:22,170 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:01:22,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:01:22,321 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:01:22,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1624557901] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:01:22,322 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:01:22,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 02:01:22,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082399786] [2021-11-07 02:01:22,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:01:22,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:01:22,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:01:22,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:01:22,324 INFO L87 Difference]: Start difference. First operand 121 states and 151 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:22,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:01:22,421 INFO L93 Difference]: Finished difference Result 199 states and 252 transitions. [2021-11-07 02:01:22,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:01:22,422 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-07 02:01:22,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:01:22,422 INFO L225 Difference]: With dead ends: 199 [2021-11-07 02:01:22,422 INFO L226 Difference]: Without dead ends: 121 [2021-11-07 02:01:22,423 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:01:22,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-11-07 02:01:22,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2021-11-07 02:01:22,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 117 states have (on average 1.2564102564102564) internal successors, (147), 120 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:22,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 147 transitions. [2021-11-07 02:01:22,432 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 147 transitions. Word has length 56 [2021-11-07 02:01:22,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:01:22,432 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 147 transitions. [2021-11-07 02:01:22,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:22,433 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 147 transitions. [2021-11-07 02:01:22,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 02:01:22,434 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:01:22,434 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 02:01:22,480 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-11-07 02:01:22,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-07 02:01:22,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:01:22,847 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2021-11-07 02:01:22,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:01:22,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1763362384, now seen corresponding path program 1 times [2021-11-07 02:01:22,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:01:22,850 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1337352339] [2021-11-07 02:01:22,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:22,850 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:01:22,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:01:22,851 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:01:22,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 02:01:26,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:26,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 1603 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:01:26,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:01:26,841 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:01:26,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:01:27,223 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:01:27,223 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:01:27,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1337352339] [2021-11-07 02:01:27,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1337352339] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:01:27,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [397348276] [2021-11-07 02:01:27,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:27,223 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:01:27,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:01:27,225 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:01:27,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-07 02:01:28,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:28,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 1603 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:01:28,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:01:29,040 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:01:29,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:01:29,226 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:01:29,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [397348276] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:01:29,226 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:01:29,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 11 [2021-11-07 02:01:29,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44031334] [2021-11-07 02:01:29,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:01:29,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:01:29,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:01:29,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-07 02:01:29,228 INFO L87 Difference]: Start difference. First operand 121 states and 147 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:29,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:01:29,376 INFO L93 Difference]: Finished difference Result 199 states and 245 transitions. [2021-11-07 02:01:29,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:01:29,377 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-07 02:01:29,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:01:29,378 INFO L225 Difference]: With dead ends: 199 [2021-11-07 02:01:29,378 INFO L226 Difference]: Without dead ends: 121 [2021-11-07 02:01:29,379 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-07 02:01:29,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-11-07 02:01:29,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2021-11-07 02:01:29,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 117 states have (on average 1.1538461538461537) internal successors, (135), 120 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:29,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 135 transitions. [2021-11-07 02:01:29,385 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 135 transitions. Word has length 58 [2021-11-07 02:01:29,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:01:29,397 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 135 transitions. [2021-11-07 02:01:29,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:29,397 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 135 transitions. [2021-11-07 02:01:29,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 02:01:29,403 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:01:29,403 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:01:29,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 02:01:29,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-07 02:01:29,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:01:29,818 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2021-11-07 02:01:29,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:01:29,819 INFO L85 PathProgramCache]: Analyzing trace with hash -222849467, now seen corresponding path program 1 times [2021-11-07 02:01:29,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:01:29,821 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [149703566] [2021-11-07 02:01:29,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:29,821 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:01:29,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:01:29,822 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:01:29,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 02:01:33,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:33,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 1615 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:01:33,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:01:33,928 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:01:33,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:01:34,337 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:01:34,337 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:01:34,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [149703566] [2021-11-07 02:01:34,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [149703566] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:01:34,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1390160978] [2021-11-07 02:01:34,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:34,338 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:01:34,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:01:34,339 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:01:34,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-07 02:01:35,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:35,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 1615 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:01:35,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:01:36,513 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:01:36,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:01:36,836 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:01:36,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1390160978] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:01:36,837 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:01:36,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [5, 5] total 12 [2021-11-07 02:01:36,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665869893] [2021-11-07 02:01:36,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:01:36,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:01:36,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:01:36,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-07 02:01:36,838 INFO L87 Difference]: Start difference. First operand 121 states and 135 transitions. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:37,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:01:37,241 INFO L93 Difference]: Finished difference Result 171 states and 190 transitions. [2021-11-07 02:01:37,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 02:01:37,242 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-07 02:01:37,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:01:37,243 INFO L225 Difference]: With dead ends: 171 [2021-11-07 02:01:37,243 INFO L226 Difference]: Without dead ends: 117 [2021-11-07 02:01:37,244 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-11-07 02:01:37,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-11-07 02:01:37,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2021-11-07 02:01:37,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 113 states have (on average 1.1415929203539823) internal successors, (129), 116 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:37,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 129 transitions. [2021-11-07 02:01:37,250 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 129 transitions. Word has length 64 [2021-11-07 02:01:37,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:01:37,250 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 129 transitions. [2021-11-07 02:01:37,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:37,250 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 129 transitions. [2021-11-07 02:01:37,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 02:01:37,251 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:01:37,251 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:01:37,288 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-07 02:01:37,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-07 02:01:37,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:01:37,659 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2021-11-07 02:01:37,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:01:37,659 INFO L85 PathProgramCache]: Analyzing trace with hash -984021474, now seen corresponding path program 1 times [2021-11-07 02:01:37,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:01:37,661 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1716501076] [2021-11-07 02:01:37,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:37,662 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:01:37,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:01:37,662 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:01:37,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 02:01:41,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:41,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 1625 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:01:41,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:01:41,837 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:01:41,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:01:42,279 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:01:42,279 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:01:42,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1716501076] [2021-11-07 02:01:42,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1716501076] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:01:42,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1744725979] [2021-11-07 02:01:42,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:42,280 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:01:42,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:01:42,294 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:01:42,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-07 02:01:44,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:44,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 1625 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:01:44,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:01:44,428 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:01:44,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:01:44,650 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:01:44,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1744725979] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:01:44,651 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:01:44,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [5, 5] total 12 [2021-11-07 02:01:44,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371851058] [2021-11-07 02:01:44,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:01:44,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:01:44,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:01:44,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-07 02:01:44,653 INFO L87 Difference]: Start difference. First operand 117 states and 129 transitions. Second operand has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:45,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:01:45,009 INFO L93 Difference]: Finished difference Result 228 states and 249 transitions. [2021-11-07 02:01:45,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:01:45,010 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-07 02:01:45,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:01:45,011 INFO L225 Difference]: With dead ends: 228 [2021-11-07 02:01:45,011 INFO L226 Difference]: Without dead ends: 178 [2021-11-07 02:01:45,011 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-11-07 02:01:45,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-11-07 02:01:45,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 135. [2021-11-07 02:01:45,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 131 states have (on average 1.1526717557251909) internal successors, (151), 134 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:45,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 151 transitions. [2021-11-07 02:01:45,019 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 151 transitions. Word has length 66 [2021-11-07 02:01:45,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:01:45,019 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 151 transitions. [2021-11-07 02:01:45,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:45,020 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 151 transitions. [2021-11-07 02:01:45,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 02:01:45,021 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:01:45,021 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:01:45,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-07 02:01:45,264 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-07 02:01:45,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:01:45,429 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2021-11-07 02:01:45,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:01:45,430 INFO L85 PathProgramCache]: Analyzing trace with hash -982174432, now seen corresponding path program 1 times [2021-11-07 02:01:45,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:01:45,432 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [582243532] [2021-11-07 02:01:45,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:45,432 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:01:45,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:01:45,433 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:01:45,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 02:01:49,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:49,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 1622 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:01:49,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:01:49,667 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:01:49,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:01:50,084 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:01:50,085 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:01:50,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [582243532] [2021-11-07 02:01:50,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [582243532] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:01:50,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1231428384] [2021-11-07 02:01:50,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:50,085 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:01:50,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:01:50,086 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:01:50,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-07 02:01:54,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:54,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 1622 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:01:54,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:01:54,316 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:01:54,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:01:54,542 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:01:54,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1231428384] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:01:54,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883319021] [2021-11-07 02:01:54,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:54,543 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:01:54,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:01:54,544 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:01:54,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-07 02:01:56,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:56,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 1622 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:01:56,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:01:56,481 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:01:56,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:01:56,664 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:01:56,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883319021] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:01:56,665 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-11-07 02:01:56,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5, 5, 5] total 11 [2021-11-07 02:01:56,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458136073] [2021-11-07 02:01:56,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:01:56,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:01:56,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:01:56,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-07 02:01:56,667 INFO L87 Difference]: Start difference. First operand 135 states and 151 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:56,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:01:56,771 INFO L93 Difference]: Finished difference Result 446 states and 502 transitions. [2021-11-07 02:01:56,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 02:01:56,772 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-07 02:01:56,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:01:56,774 INFO L225 Difference]: With dead ends: 446 [2021-11-07 02:01:56,774 INFO L226 Difference]: Without dead ends: 344 [2021-11-07 02:01:56,775 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 381 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-07 02:01:56,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-11-07 02:01:56,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 138. [2021-11-07 02:01:56,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 134 states have (on average 1.1492537313432836) internal successors, (154), 137 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:56,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 154 transitions. [2021-11-07 02:01:56,784 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 154 transitions. Word has length 66 [2021-11-07 02:01:56,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:01:56,784 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 154 transitions. [2021-11-07 02:01:56,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:56,785 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 154 transitions. [2021-11-07 02:01:56,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 02:01:56,785 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:01:56,786 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:01:56,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-07 02:01:57,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-07 02:01:57,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 02:01:57,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:01:57,402 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2021-11-07 02:01:57,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:01:57,403 INFO L85 PathProgramCache]: Analyzing trace with hash 347303996, now seen corresponding path program 1 times [2021-11-07 02:01:57,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:01:57,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1688993112] [2021-11-07 02:01:57,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:57,405 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:01:57,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:01:57,406 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:01:57,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-07 02:02:01,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:02:01,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 1630 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:02:01,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:02:01,689 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:02:01,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:02:02,150 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:02:02,150 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:02:02,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1688993112] [2021-11-07 02:02:02,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1688993112] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:02:02,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2142352110] [2021-11-07 02:02:02,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:02:02,151 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:02:02,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:02:02,152 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:02:02,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-07 02:02:06,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:02:06,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 1630 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:02:06,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:02:06,587 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:02:06,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:02:06,826 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:02:06,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2142352110] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:02:06,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752320700] [2021-11-07 02:02:06,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:02:06,827 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:02:06,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:02:06,828 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:02:06,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-07 02:02:08,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:02:08,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 1630 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-07 02:02:08,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:02:09,055 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:02:09,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:02:09,289 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:02:09,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752320700] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:02:09,289 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-11-07 02:02:09,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [5, 5, 5, 5] total 13 [2021-11-07 02:02:09,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669786235] [2021-11-07 02:02:09,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 02:02:09,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:02:09,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 02:02:09,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-11-07 02:02:09,291 INFO L87 Difference]: Start difference. First operand 138 states and 154 transitions. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:09,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:02:09,664 INFO L93 Difference]: Finished difference Result 245 states and 274 transitions. [2021-11-07 02:02:09,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 02:02:09,664 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-07 02:02:09,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:02:09,665 INFO L225 Difference]: With dead ends: 245 [2021-11-07 02:02:09,665 INFO L226 Difference]: Without dead ends: 133 [2021-11-07 02:02:09,666 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 391 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-11-07 02:02:09,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-11-07 02:02:09,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2021-11-07 02:02:09,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 129 states have (on average 1.1395348837209303) internal successors, (147), 132 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:09,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 147 transitions. [2021-11-07 02:02:09,674 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 147 transitions. Word has length 68 [2021-11-07 02:02:09,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:02:09,674 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 147 transitions. [2021-11-07 02:02:09,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:09,675 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 147 transitions. [2021-11-07 02:02:09,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 02:02:09,675 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:02:09,676 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:02:09,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-11-07 02:02:09,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-07 02:02:10,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-07 02:02:10,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:02:10,291 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2021-11-07 02:02:10,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:02:10,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1199480250, now seen corresponding path program 1 times [2021-11-07 02:02:10,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:02:10,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [258893372] [2021-11-07 02:02:10,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:02:10,294 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:02:10,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:02:10,294 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:02:10,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-07 02:02:14,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:02:14,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 1635 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:02:14,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:02:14,711 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:02:14,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:02:15,116 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:02:15,116 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:02:15,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [258893372] [2021-11-07 02:02:15,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [258893372] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:02:15,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1799364773] [2021-11-07 02:02:15,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:02:15,117 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:02:15,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:02:15,119 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:02:15,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-11-07 02:02:19,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:02:19,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 1635 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:02:19,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:02:19,703 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:02:19,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:02:19,963 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:02:19,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1799364773] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:02:19,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702124710] [2021-11-07 02:02:19,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:02:19,963 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:02:19,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:02:19,964 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:02:19,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-07 02:02:21,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:02:21,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 1635 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:02:21,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:02:22,129 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:02:22,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:02:22,637 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:02:22,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702124710] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:02:22,637 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 02:02:22,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 10 [2021-11-07 02:02:22,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004865369] [2021-11-07 02:02:22,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 02:02:22,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:02:22,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 02:02:22,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:02:22,639 INFO L87 Difference]: Start difference. First operand 133 states and 147 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:23,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:02:23,143 INFO L93 Difference]: Finished difference Result 256 states and 287 transitions. [2021-11-07 02:02:23,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 02:02:23,144 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-07 02:02:23,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:02:23,145 INFO L225 Difference]: With dead ends: 256 [2021-11-07 02:02:23,145 INFO L226 Difference]: Without dead ends: 137 [2021-11-07 02:02:23,145 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 400 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-11-07 02:02:23,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-11-07 02:02:23,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2021-11-07 02:02:23,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 133 states have (on average 1.1353383458646618) internal successors, (151), 136 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:23,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 151 transitions. [2021-11-07 02:02:23,153 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 151 transitions. Word has length 69 [2021-11-07 02:02:23,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:02:23,154 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 151 transitions. [2021-11-07 02:02:23,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:23,154 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 151 transitions. [2021-11-07 02:02:23,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 02:02:23,155 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:02:23,155 INFO L513 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:02:23,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-07 02:02:23,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2021-11-07 02:02:23,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-07 02:02:23,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:02:23,768 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2021-11-07 02:02:23,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:02:23,769 INFO L85 PathProgramCache]: Analyzing trace with hash 814378502, now seen corresponding path program 2 times [2021-11-07 02:02:23,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:02:23,771 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1194860281] [2021-11-07 02:02:23,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:02:23,771 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:02:23,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:02:23,772 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:02:23,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-07 02:05:06,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-07 02:05:06,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:05:06,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 1625 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-07 02:05:06,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:07,715 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 11 treesize of output 7 [2021-11-07 02:05:07,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-11-07 02:05:08,671 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:05:08,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 34 [2021-11-07 02:05:08,809 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 02:05:08,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:09,295 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 42 treesize of output 36 [2021-11-07 02:05:09,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 430 treesize of output 366 [2021-11-07 02:05:09,445 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 33 treesize of output 27 [2021-11-07 02:05:09,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 36 [2021-11-07 02:05:09,515 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 33 treesize of output 27 [2021-11-07 02:05:09,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 36 [2021-11-07 02:05:09,587 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 33 treesize of output 27 [2021-11-07 02:05:09,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 36 [2021-11-07 02:05:09,658 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 33 treesize of output 27 [2021-11-07 02:05:09,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 36 [2021-11-07 02:05:09,729 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 33 treesize of output 27 [2021-11-07 02:05:09,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 36 [2021-11-07 02:05:09,796 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 33 treesize of output 27 [2021-11-07 02:05:09,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 36 [2021-11-07 02:05:09,855 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 33 treesize of output 27 [2021-11-07 02:05:09,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 36 [2021-11-07 02:05:09,922 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 33 treesize of output 27 [2021-11-07 02:05:09,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 36 [2021-11-07 02:05:09,996 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 33 treesize of output 27 [2021-11-07 02:05:10,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 36 [2021-11-07 02:05:10,396 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 33 treesize of output 27 [2021-11-07 02:05:10,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 36 [2021-11-07 02:05:10,465 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 33 treesize of output 27 [2021-11-07 02:05:10,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 36 [2021-11-07 02:05:10,547 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 33 treesize of output 27 [2021-11-07 02:05:10,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 36 [2021-11-07 02:05:10,629 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 33 treesize of output 27 [2021-11-07 02:05:10,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 36 [2021-11-07 02:05:10,703 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 33 treesize of output 27 [2021-11-07 02:05:10,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 36 [2021-11-07 02:05:10,777 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 33 treesize of output 27 [2021-11-07 02:05:10,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 36 [2021-11-07 02:05:10,850 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 33 treesize of output 27 [2021-11-07 02:05:10,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 36 [2021-11-07 02:05:10,922 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 33 treesize of output 27 [2021-11-07 02:05:10,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 36 [2021-11-07 02:05:10,978 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 33 treesize of output 27 [2021-11-07 02:05:10,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 36 [2021-11-07 02:05:11,041 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 33 treesize of output 27 [2021-11-07 02:05:11,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 36 [2021-11-07 02:05:11,099 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 33 treesize of output 27 [2021-11-07 02:05:11,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 36 [2021-11-07 02:05:11,161 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 33 treesize of output 27 [2021-11-07 02:05:11,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 36 [2021-11-07 02:05:11,235 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 33 treesize of output 27 [2021-11-07 02:05:11,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 36 [2021-11-07 02:05:11,308 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 33 treesize of output 27 [2021-11-07 02:05:11,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 36 [2021-11-07 02:05:11,375 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 33 treesize of output 27 [2021-11-07 02:05:11,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 36 [2021-11-07 02:05:11,443 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 33 treesize of output 27 [2021-11-07 02:05:11,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 36 [2021-11-07 02:05:11,616 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 02:05:11,616 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:05:11,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1194860281] [2021-11-07 02:05:11,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1194860281] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:05:11,617 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:05:11,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12, 10] imperfect sequences [] total 19 [2021-11-07 02:05:11,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031490028] [2021-11-07 02:05:11,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-07 02:05:11,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:05:11,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-07 02:05:11,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-11-07 02:05:11,619 INFO L87 Difference]: Start difference. First operand 137 states and 151 transitions. Second operand has 19 states, 19 states have (on average 6.684210526315789) internal successors, (127), 19 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:16,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:05:16,011 INFO L93 Difference]: Finished difference Result 202 states and 223 transitions. [2021-11-07 02:05:16,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 02:05:16,013 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 6.684210526315789) internal successors, (127), 19 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-07 02:05:16,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:05:16,014 INFO L225 Difference]: With dead ends: 202 [2021-11-07 02:05:16,014 INFO L226 Difference]: Without dead ends: 137 [2021-11-07 02:05:16,015 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 102 SyntacticMatches, 25 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=243, Invalid=569, Unknown=0, NotChecked=0, Total=812 [2021-11-07 02:05:16,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-11-07 02:05:16,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2021-11-07 02:05:16,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 133 states have (on average 1.1203007518796992) internal successors, (149), 136 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:16,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 149 transitions. [2021-11-07 02:05:16,027 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 149 transitions. Word has length 73 [2021-11-07 02:05:16,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:05:16,027 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 149 transitions. [2021-11-07 02:05:16,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.684210526315789) internal successors, (127), 19 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:16,028 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 149 transitions. [2021-11-07 02:05:16,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 02:05:16,028 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:05:16,028 INFO L513 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:05:16,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-07 02:05:16,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:05:16,242 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2021-11-07 02:05:16,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:05:16,242 INFO L85 PathProgramCache]: Analyzing trace with hash 5031876, now seen corresponding path program 1 times [2021-11-07 02:05:16,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:05:16,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [510681110] [2021-11-07 02:05:16,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:05:16,245 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:05:16,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:05:16,246 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:05:16,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-07 02:05:20,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:05:20,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 1658 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 02:05:20,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:21,057 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:05:21,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:22,230 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:05:22,230 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:05:22,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [510681110] [2021-11-07 02:05:22,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [510681110] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:05:22,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [242118373] [2021-11-07 02:05:22,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:05:22,230 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:05:22,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:05:22,233 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:05:22,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-07 02:05:26,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:05:26,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 1658 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 02:05:26,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:27,032 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:05:27,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:27,294 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:05:27,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [242118373] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:05:27,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811955233] [2021-11-07 02:05:27,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:05:27,294 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:05:27,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:05:27,295 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:05:27,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-07 02:05:29,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:05:29,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 1658 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-07 02:05:29,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:30,445 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 [2021-11-07 02:05:30,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:05:30,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:05:30,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:05:30,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2021-11-07 02:05:30,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:05:30,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-11-07 02:05:30,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 19 [2021-11-07 02:05:31,722 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 02:05:31,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:32,996 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 20 treesize of output 18 [2021-11-07 02:05:33,643 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 02:05:33,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811955233] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:05:33,643 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-11-07 02:05:33,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15, 13] imperfect sequences [9, 9, 9, 9] total 39 [2021-11-07 02:05:33,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792236583] [2021-11-07 02:05:33,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-07 02:05:33,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:05:33,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-07 02:05:33,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1336, Unknown=0, NotChecked=0, Total=1482 [2021-11-07 02:05:33,646 INFO L87 Difference]: Start difference. First operand 137 states and 149 transitions. Second operand has 25 states, 25 states have (on average 4.72) internal successors, (118), 25 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:49,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:05:49,682 INFO L93 Difference]: Finished difference Result 218 states and 240 transitions. [2021-11-07 02:05:49,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-07 02:05:49,684 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.72) internal successors, (118), 25 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-07 02:05:49,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:05:49,685 INFO L225 Difference]: With dead ends: 218 [2021-11-07 02:05:49,685 INFO L226 Difference]: Without dead ends: 138 [2021-11-07 02:05:49,687 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 393 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=444, Invalid=2418, Unknown=0, NotChecked=0, Total=2862 [2021-11-07 02:05:49,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-11-07 02:05:49,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2021-11-07 02:05:49,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 133 states have (on average 1.112781954887218) internal successors, (148), 136 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:49,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 148 transitions. [2021-11-07 02:05:49,702 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 148 transitions. Word has length 73 [2021-11-07 02:05:49,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:05:49,702 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 148 transitions. [2021-11-07 02:05:49,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.72) internal successors, (118), 25 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:49,703 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 148 transitions. [2021-11-07 02:05:49,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 02:05:49,704 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:05:49,704 INFO L513 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:05:49,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2021-11-07 02:05:49,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-07 02:05:50,169 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-11-07 02:05:50,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:05:50,321 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2021-11-07 02:05:50,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:05:50,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1583316026, now seen corresponding path program 1 times [2021-11-07 02:05:50,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:05:50,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1372672392] [2021-11-07 02:05:50,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:05:50,325 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:05:50,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:05:50,330 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:05:50,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-07 02:05:54,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:05:54,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 1655 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 02:05:54,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:55,256 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:05:55,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:56,478 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:05:56,478 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:05:56,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1372672392] [2021-11-07 02:05:56,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1372672392] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:05:56,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1350750884] [2021-11-07 02:05:56,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:05:56,479 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:05:56,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:05:56,480 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:05:56,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-11-07 02:06:01,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:01,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 1655 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 02:06:01,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:06:01,660 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:06:01,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:06:01,922 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:06:01,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1350750884] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:06:01,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114560740] [2021-11-07 02:06:01,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:01,923 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:06:01,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:06:01,924 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:06:01,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-07 02:06:04,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:04,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 1655 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 02:06:04,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:06:04,545 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:06:04,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:06:06,934 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:06:06,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114560740] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:06:06,935 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 02:06:06,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 22 [2021-11-07 02:06:06,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917542335] [2021-11-07 02:06:06,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-07 02:06:06,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:06:06,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-07 02:06:06,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2021-11-07 02:06:06,937 INFO L87 Difference]: Start difference. First operand 137 states and 148 transitions. Second operand has 22 states, 22 states have (on average 4.0) internal successors, (88), 22 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:09,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:06:09,457 INFO L93 Difference]: Finished difference Result 264 states and 293 transitions. [2021-11-07 02:06:09,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-07 02:06:09,459 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.0) internal successors, (88), 22 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-07 02:06:09,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:06:09,460 INFO L225 Difference]: With dead ends: 264 [2021-11-07 02:06:09,460 INFO L226 Difference]: Without dead ends: 145 [2021-11-07 02:06:09,461 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 412 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=255, Invalid=501, Unknown=0, NotChecked=0, Total=756 [2021-11-07 02:06:09,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-11-07 02:06:09,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-11-07 02:06:09,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 141 states have (on average 1.1063829787234043) internal successors, (156), 144 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:09,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 156 transitions. [2021-11-07 02:06:09,474 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 156 transitions. Word has length 73 [2021-11-07 02:06:09,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:06:09,475 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 156 transitions. [2021-11-07 02:06:09,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.0) internal successors, (88), 22 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:09,475 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 156 transitions. [2021-11-07 02:06:09,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-07 02:06:09,476 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:06:09,476 INFO L513 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:06:09,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-07 02:06:09,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2021-11-07 02:06:09,941 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-07 02:06:10,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:06:10,091 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2021-11-07 02:06:10,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:06:10,091 INFO L85 PathProgramCache]: Analyzing trace with hash 366934854, now seen corresponding path program 2 times [2021-11-07 02:06:10,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:06:10,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2043067632] [2021-11-07 02:06:10,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:06:10,094 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:06:10,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:06:10,094 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:06:10,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9f6dc2a-22e6-46a6-aaaa-f9d8513a8084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process