./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_front_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_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/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_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/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_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/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 61592663790a1842b8bd7e9befeca1c276604b90aee8701db027349608c78395 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:07:58,075 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:07:58,077 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:07:58,138 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:07:58,139 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:07:58,143 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:07:58,145 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:07:58,150 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:07:58,153 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:07:58,159 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:07:58,160 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:07:58,162 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:07:58,163 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:07:58,166 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:07:58,168 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:07:58,176 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:07:58,179 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:07:58,180 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:07:58,183 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:07:58,194 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:07:58,196 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:07:58,198 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:07:58,202 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:07:58,203 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:07:58,213 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:07:58,213 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:07:58,214 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:07:58,216 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:07:58,217 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:07:58,219 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:07:58,220 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:07:58,221 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:07:58,223 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:07:58,224 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:07:58,226 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:07:58,226 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:07:58,227 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:07:58,227 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:07:58,228 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:07:58,229 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:07:58,230 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:07:58,231 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-07 02:07:58,279 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:07:58,280 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:07:58,281 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:07:58,281 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:07:58,281 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:07:58,281 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:07:58,281 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:07:58,282 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:07:58,282 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:07:58,282 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:07:58,282 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:07:58,283 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:07:58,283 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:07:58,283 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:07:58,287 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:07:58,288 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:07:58,288 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:07:58,288 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:07:58,289 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:07:58,289 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:07:58,289 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:07:58,289 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:07:58,290 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:07:58,290 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:07:58,290 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:07:58,290 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:07:58,290 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:07:58,291 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:07:58,291 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:07:58,291 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:07:58,291 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:07:58,292 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:07:58,292 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:07:58,292 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:07:58,292 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:07:58,293 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:07:58,293 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_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 61592663790a1842b8bd7e9befeca1c276604b90aee8701db027349608c78395 [2021-11-07 02:07:58,640 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:07:58,681 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:07:58,685 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:07:58,687 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:07:58,688 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:07:58,689 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i [2021-11-07 02:07:58,776 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/data/74e7eca5e/3ab4f351254c4764a58366769ccf3841/FLAG80d84c9ac [2021-11-07 02:07:59,746 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:07:59,747 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i [2021-11-07 02:07:59,806 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/data/74e7eca5e/3ab4f351254c4764a58366769ccf3841/FLAG80d84c9ac [2021-11-07 02:08:00,302 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/data/74e7eca5e/3ab4f351254c4764a58366769ccf3841 [2021-11-07 02:08:00,305 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:08:00,306 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:08:00,311 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:08:00,311 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:08:00,315 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:08:00,317 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:08:00" (1/1) ... [2021-11-07 02:08:00,319 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fb49d01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:00, skipping insertion in model container [2021-11-07 02:08:00,320 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:08:00" (1/1) ... [2021-11-07 02:08:00,327 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:08:00,446 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:08:00,768 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_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i[4495,4508] [2021-11-07 02:08:00,779 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_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i[4555,4568] [2021-11-07 02:08:00,803 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-07 02:08:00,818 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-07 02:08:01,704 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:08:01,705 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:08:01,706 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:08:01,707 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:08:01,709 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:08:01,727 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:08:01,728 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:08:01,730 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:08:01,731 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:08:01,734 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:08:01,735 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:08:01,736 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:08:01,737 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:08:02,168 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-07 02:08:02,170 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-07 02:08:02,171 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-07 02:08:02,173 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-07 02:08:02,179 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-07 02:08:02,180 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-07 02:08:02,181 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-07 02:08:02,197 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-07 02:08:02,198 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-07 02:08:02,198 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-07 02:08:02,405 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-07 02:08:02,437 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:08:02,459 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 02:08:02,460 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@19a15b1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:02, skipping insertion in model container [2021-11-07 02:08:02,460 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:08:02,461 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 02:08:02,466 INFO L168 Benchmark]: Toolchain (without parser) took 2155.87 ms. Allocated memory was 111.1 MB in the beginning and 148.9 MB in the end (delta: 37.7 MB). Free memory was 73.9 MB in the beginning and 89.6 MB in the end (delta: -15.7 MB). Peak memory consumption was 22.7 MB. Max. memory is 16.1 GB. [2021-11-07 02:08:02,467 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 111.1 MB. Free memory was 65.7 MB in the beginning and 65.6 MB in the end (delta: 62.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 02:08:02,469 INFO L168 Benchmark]: CACSL2BoogieTranslator took 2149.84 ms. Allocated memory was 111.1 MB in the beginning and 148.9 MB in the end (delta: 37.7 MB). Free memory was 73.6 MB in the beginning and 89.6 MB in the end (delta: -15.9 MB). Peak memory consumption was 22.7 MB. Max. memory is 16.1 GB. [2021-11-07 02:08:02,471 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 111.1 MB. Free memory was 65.7 MB in the beginning and 65.6 MB in the end (delta: 62.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 2149.84 ms. Allocated memory was 111.1 MB in the beginning and 148.9 MB in the end (delta: 37.7 MB). Free memory was 73.6 MB in the beginning and 89.6 MB in the end (delta: -15.9 MB). Peak memory consumption was 22.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 7037]: 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_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/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_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/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_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/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 61592663790a1842b8bd7e9befeca1c276604b90aee8701db027349608c78395 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:08:05,022 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:08:05,026 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:08:05,067 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:08:05,068 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:08:05,069 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:08:05,072 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:08:05,075 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:08:05,077 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:08:05,079 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:08:05,080 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:08:05,082 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:08:05,083 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:08:05,084 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:08:05,086 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:08:05,088 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:08:05,089 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:08:05,090 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:08:05,093 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:08:05,096 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:08:05,099 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:08:05,100 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:08:05,102 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:08:05,103 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:08:05,108 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:08:05,108 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:08:05,109 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:08:05,110 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:08:05,111 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:08:05,112 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:08:05,113 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:08:05,114 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:08:05,115 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:08:05,116 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:08:05,117 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:08:05,118 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:08:05,119 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:08:05,119 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:08:05,120 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:08:05,121 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:08:05,122 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:08:05,123 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-07 02:08:05,168 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:08:05,169 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:08:05,170 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:08:05,170 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:08:05,170 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:08:05,171 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:08:05,171 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:08:05,171 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:08:05,171 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:08:05,173 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:08:05,174 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:08:05,174 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:08:05,174 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:08:05,174 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:08:05,175 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:08:05,175 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 02:08:05,175 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 02:08:05,175 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:08:05,176 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:08:05,176 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:08:05,176 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:08:05,176 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 02:08:05,176 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:08:05,177 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:08:05,177 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:08:05,177 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:08:05,177 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:08:05,178 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 02:08:05,178 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 02:08:05,178 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:08:05,178 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:08:05,178 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:08:05,179 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_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 61592663790a1842b8bd7e9befeca1c276604b90aee8701db027349608c78395 [2021-11-07 02:08:05,613 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:08:05,635 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:08:05,638 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:08:05,639 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:08:05,643 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:08:05,644 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i [2021-11-07 02:08:05,710 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/data/5b234c225/2faf3c00f2e948a78a39ecd18f49099c/FLAG5f870fb67 [2021-11-07 02:08:06,567 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:08:06,568 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i [2021-11-07 02:08:06,613 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/data/5b234c225/2faf3c00f2e948a78a39ecd18f49099c/FLAG5f870fb67 [2021-11-07 02:08:07,076 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/data/5b234c225/2faf3c00f2e948a78a39ecd18f49099c [2021-11-07 02:08:07,085 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:08:07,086 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:08:07,087 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:08:07,088 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:08:07,092 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:08:07,093 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:08:07" (1/1) ... [2021-11-07 02:08:07,097 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ba5ed73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:07, skipping insertion in model container [2021-11-07 02:08:07,097 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:08:07" (1/1) ... [2021-11-07 02:08:07,105 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:08:07,214 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:08:07,607 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_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i[4495,4508] [2021-11-07 02:08:07,614 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_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i[4555,4568] [2021-11-07 02:08:07,632 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-07 02:08:07,636 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-07 02:08:08,572 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:08:08,573 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:08:08,574 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:08:08,575 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:08:08,576 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:08:08,593 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:08:08,594 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:08:08,596 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:08:08,597 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:08:08,600 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:08:08,601 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:08:08,602 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:08:08,603 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:08:09,042 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-07 02:08:09,043 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-07 02:08:09,052 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-07 02:08:09,054 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-07 02:08:09,056 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-07 02:08:09,057 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-07 02:08:09,057 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-07 02:08:09,058 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-07 02:08:09,059 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-07 02:08:09,060 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-07 02:08:09,316 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-07 02:08:09,371 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:08:09,424 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 02:08:09,504 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:08:09,511 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_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i[4495,4508] [2021-11-07 02:08:09,512 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_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i[4555,4568] [2021-11-07 02:08:09,516 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-07 02:08:09,517 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-07 02:08:09,610 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:08:09,610 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:08:09,611 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:08:09,611 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:08:09,612 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:08:09,620 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:08:09,621 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:08:09,622 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:08:09,623 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:08:09,634 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:08:09,635 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:08:09,636 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:08:09,636 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:08:09,721 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-07 02:08:09,722 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-07 02:08:09,726 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-07 02:08:09,728 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-07 02:08:09,735 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-07 02:08:09,736 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-07 02:08:09,736 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-07 02:08:09,737 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-07 02:08:09,737 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-07 02:08:09,738 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-07 02:08:09,778 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-07 02:08:09,824 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:08:09,844 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:08:09,867 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_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i[4495,4508] [2021-11-07 02:08:09,867 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_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i[4555,4568] [2021-11-07 02:08:09,869 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-07 02:08:09,869 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-07 02:08:09,927 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:08:09,927 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:08:09,928 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:08:09,928 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:08:09,929 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:08:09,939 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:08:09,940 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:08:09,941 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:08:09,941 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:08:09,942 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:08:09,943 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:08:09,943 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:08:09,944 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:08:09,982 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-07 02:08:09,982 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-07 02:08:09,983 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-07 02:08:09,984 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-07 02:08:09,984 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-07 02:08:09,985 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-07 02:08:09,986 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-07 02:08:09,987 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-07 02:08:09,987 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-07 02:08:09,988 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-07 02:08:10,025 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-07 02:08:10,044 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:08:10,334 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:08:10,335 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:10 WrapperNode [2021-11-07 02:08:10,335 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:08:10,336 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:08:10,336 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:08:10,336 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:08:10,344 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:10" (1/1) ... [2021-11-07 02:08:10,471 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:10" (1/1) ... [2021-11-07 02:08:10,540 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:08:10,541 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:08:10,541 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:08:10,541 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:08:10,550 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:10" (1/1) ... [2021-11-07 02:08:10,551 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:10" (1/1) ... [2021-11-07 02:08:10,569 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:10" (1/1) ... [2021-11-07 02:08:10,569 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:10" (1/1) ... [2021-11-07 02:08:10,632 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:10" (1/1) ... [2021-11-07 02:08:10,647 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:10" (1/1) ... [2021-11-07 02:08:10,654 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:10" (1/1) ... [2021-11-07 02:08:10,691 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:08:10,692 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:08:10,692 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:08:10,692 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:08:10,693 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:10" (1/1) ... [2021-11-07 02:08:10,701 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:08:10,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:08:10,728 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:08:10,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:08:10,787 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 02:08:10,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 02:08:10,788 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 02:08:10,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 02:08:10,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:08:10,789 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:08:10,789 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:08:10,789 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 02:08:10,789 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-07 02:08:11,832 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:08:11,833 INFO L299 CfgBuilder]: Removed 72 assume(true) statements. [2021-11-07 02:08:11,835 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:08:11 BoogieIcfgContainer [2021-11-07 02:08:11,835 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:08:11,837 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:08:11,837 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:08:11,841 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:08:11,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:08:07" (1/3) ... [2021-11-07 02:08:11,842 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3add04a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:08:11, skipping insertion in model container [2021-11-07 02:08:11,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:10" (2/3) ... [2021-11-07 02:08:11,842 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3add04a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:08:11, skipping insertion in model container [2021-11-07 02:08:11,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:08:11" (3/3) ... [2021-11-07 02:08:11,844 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_front_harness.i [2021-11-07 02:08:11,851 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:08:11,851 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2021-11-07 02:08:11,906 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:08:11,913 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 02:08:11,914 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-11-07 02:08:11,935 INFO L276 IsEmpty]: Start isEmpty. Operand has 134 states, 126 states have (on average 1.5238095238095237) internal successors, (192), 133 states have internal predecessors, (192), 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 02:08:11,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-07 02:08:11,943 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:08:11,944 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, 1, 1] [2021-11-07 02:08:11,945 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 02:08:11,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:08:11,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1861478915, now seen corresponding path program 1 times [2021-11-07 02:08:11,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:08:11,968 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1324013126] [2021-11-07 02:08:11,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:11,969 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:08:11,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:08:11,973 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:08:12,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 02:08:12,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:12,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 02:08:12,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:12,347 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 02:08:12,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:12,459 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 02:08:12,460 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:08:12,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1324013126] [2021-11-07 02:08:12,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1324013126] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:08:12,461 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:08:12,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:08:12,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653591499] [2021-11-07 02:08:12,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 02:08:12,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:08:12,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 02:08:12,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:08:12,486 INFO L87 Difference]: Start difference. First operand has 134 states, 126 states have (on average 1.5238095238095237) internal successors, (192), 133 states have internal predecessors, (192), 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 20.0) internal successors, (40), 2 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 02:08:12,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:08:12,518 INFO L93 Difference]: Finished difference Result 264 states and 379 transitions. [2021-11-07 02:08:12,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 02:08:12,519 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 20.0) internal successors, (40), 2 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 40 [2021-11-07 02:08:12,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:08:12,530 INFO L225 Difference]: With dead ends: 264 [2021-11-07 02:08:12,556 INFO L226 Difference]: Without dead ends: 129 [2021-11-07 02:08:12,559 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 78 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 02:08:12,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-11-07 02:08:12,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2021-11-07 02:08:12,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 122 states have (on average 1.3934426229508197) internal successors, (170), 128 states have internal predecessors, (170), 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 02:08:12,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 170 transitions. [2021-11-07 02:08:12,607 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 170 transitions. Word has length 40 [2021-11-07 02:08:12,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:08:12,608 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 170 transitions. [2021-11-07 02:08:12,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 20.0) internal successors, (40), 2 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 02:08:12,608 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 170 transitions. [2021-11-07 02:08:12,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-07 02:08:12,610 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:08:12,610 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, 1, 1] [2021-11-07 02:08:12,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 02:08:12,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:08:12,824 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 02:08:12,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:08:12,825 INFO L85 PathProgramCache]: Analyzing trace with hash -836812353, now seen corresponding path program 1 times [2021-11-07 02:08:12,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:08:12,826 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [461740843] [2021-11-07 02:08:12,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:12,826 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:08:12,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:08:12,828 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:08:12,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 02:08:13,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:13,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:08:13,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:13,325 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 02:08:13,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:13,490 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 02:08:13,491 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:08:13,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [461740843] [2021-11-07 02:08:13,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [461740843] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:08:13,491 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:08:13,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 02:08:13,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847399517] [2021-11-07 02:08:13,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:08:13,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:08:13,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:08:13,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:08:13,495 INFO L87 Difference]: Start difference. First operand 129 states and 170 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 02:08:13,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:08:13,583 INFO L93 Difference]: Finished difference Result 243 states and 323 transitions. [2021-11-07 02:08:13,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:08:13,584 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 40 [2021-11-07 02:08:13,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:08:13,586 INFO L225 Difference]: With dead ends: 243 [2021-11-07 02:08:13,586 INFO L226 Difference]: Without dead ends: 129 [2021-11-07 02:08:13,588 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:08:13,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-11-07 02:08:13,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2021-11-07 02:08:13,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 122 states have (on average 1.3770491803278688) internal successors, (168), 128 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 02:08:13,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 168 transitions. [2021-11-07 02:08:13,602 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 168 transitions. Word has length 40 [2021-11-07 02:08:13,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:08:13,603 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 168 transitions. [2021-11-07 02:08:13,603 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 02:08:13,603 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 168 transitions. [2021-11-07 02:08:13,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-07 02:08:13,605 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:08:13,605 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, 1, 1] [2021-11-07 02:08:13,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 02:08:13,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:08:13,823 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 02:08:13,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:08:13,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1534926909, now seen corresponding path program 1 times [2021-11-07 02:08:13,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:08:13,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [667386229] [2021-11-07 02:08:13,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:13,826 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:08:13,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:08:13,827 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:08:13,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 02:08:14,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:14,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:08:14,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:14,239 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 02:08:14,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:14,365 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 02:08:14,365 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:08:14,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [667386229] [2021-11-07 02:08:14,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [667386229] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:08:14,382 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:08:14,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 02:08:14,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839284216] [2021-11-07 02:08:14,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:08:14,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:08:14,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:08:14,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:08:14,391 INFO L87 Difference]: Start difference. First operand 129 states and 168 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 02:08:14,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:08:14,519 INFO L93 Difference]: Finished difference Result 275 states and 349 transitions. [2021-11-07 02:08:14,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:08:14,524 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 40 [2021-11-07 02:08:14,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:08:14,526 INFO L225 Difference]: With dead ends: 275 [2021-11-07 02:08:14,527 INFO L226 Difference]: Without dead ends: 179 [2021-11-07 02:08:14,528 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:08:14,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-11-07 02:08:14,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 129. [2021-11-07 02:08:14,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 122 states have (on average 1.3688524590163935) internal successors, (167), 128 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 02:08:14,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 167 transitions. [2021-11-07 02:08:14,558 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 167 transitions. Word has length 40 [2021-11-07 02:08:14,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:08:14,559 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 167 transitions. [2021-11-07 02:08:14,563 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 02:08:14,563 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 167 transitions. [2021-11-07 02:08:14,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-07 02:08:14,567 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:08:14,568 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, 1, 1, 1, 1] [2021-11-07 02:08:14,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 02:08:14,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:08:14,781 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 02:08:14,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:08:14,782 INFO L85 PathProgramCache]: Analyzing trace with hash 199131234, now seen corresponding path program 1 times [2021-11-07 02:08:14,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:08:14,783 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1723591364] [2021-11-07 02:08:14,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:14,783 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:08:14,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:08:14,784 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:08:14,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 02:08:15,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:15,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:08:15,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:15,261 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 02:08:15,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:15,424 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 02:08:15,425 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:08:15,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1723591364] [2021-11-07 02:08:15,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1723591364] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:08:15,425 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:08:15,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 02:08:15,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265908830] [2021-11-07 02:08:15,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:08:15,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:08:15,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:08:15,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:08:15,427 INFO L87 Difference]: Start difference. First operand 129 states and 167 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 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 02:08:15,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:08:15,626 INFO L93 Difference]: Finished difference Result 284 states and 361 transitions. [2021-11-07 02:08:15,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 02:08:15,628 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 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 42 [2021-11-07 02:08:15,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:08:15,630 INFO L225 Difference]: With dead ends: 284 [2021-11-07 02:08:15,630 INFO L226 Difference]: Without dead ends: 187 [2021-11-07 02:08:15,631 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:08:15,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-11-07 02:08:15,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 129. [2021-11-07 02:08:15,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 122 states have (on average 1.3524590163934427) internal successors, (165), 128 states have internal predecessors, (165), 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 02:08:15,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 165 transitions. [2021-11-07 02:08:15,666 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 165 transitions. Word has length 42 [2021-11-07 02:08:15,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:08:15,666 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 165 transitions. [2021-11-07 02:08:15,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 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 02:08:15,667 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 165 transitions. [2021-11-07 02:08:15,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 02:08:15,669 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:08:15,669 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, 1, 1, 1, 1, 1, 1] [2021-11-07 02:08:15,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 02:08:15,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:08:15,876 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 02:08:15,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:08:15,877 INFO L85 PathProgramCache]: Analyzing trace with hash 496706596, now seen corresponding path program 1 times [2021-11-07 02:08:15,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:08:15,878 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [570894744] [2021-11-07 02:08:15,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:15,878 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:08:15,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:08:15,883 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:08:15,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 02:08:16,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:16,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 02:08:16,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:16,426 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 02:08:16,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:16,593 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 02:08:16,593 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:08:16,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [570894744] [2021-11-07 02:08:16,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [570894744] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:08:16,594 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:08:16,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 6 [2021-11-07 02:08:16,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415515537] [2021-11-07 02:08:16,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:08:16,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:08:16,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:08:16,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:08:16,597 INFO L87 Difference]: Start difference. First operand 129 states and 165 transitions. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 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 02:08:16,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:08:16,978 INFO L93 Difference]: Finished difference Result 379 states and 479 transitions. [2021-11-07 02:08:16,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 02:08:16,979 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 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 44 [2021-11-07 02:08:16,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:08:16,981 INFO L225 Difference]: With dead ends: 379 [2021-11-07 02:08:16,982 INFO L226 Difference]: Without dead ends: 281 [2021-11-07 02:08:16,983 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-07 02:08:16,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-11-07 02:08:17,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 131. [2021-11-07 02:08:17,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 124 states have (on average 1.346774193548387) internal successors, (167), 130 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 02:08:17,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 167 transitions. [2021-11-07 02:08:17,003 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 167 transitions. Word has length 44 [2021-11-07 02:08:17,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:08:17,003 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 167 transitions. [2021-11-07 02:08:17,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 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 02:08:17,004 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 167 transitions. [2021-11-07 02:08:17,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-07 02:08:17,006 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:08:17,006 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:08:17,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 02:08:17,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:08:17,227 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 02:08:17,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:08:17,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1200660794, now seen corresponding path program 1 times [2021-11-07 02:08:17,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:08:17,228 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1588770107] [2021-11-07 02:08:17,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:17,229 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:08:17,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:08:17,230 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:08:17,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 02:08:17,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:17,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 02:08:17,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:17,754 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 02:08:17,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:17,918 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 02:08:17,918 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:08:17,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1588770107] [2021-11-07 02:08:17,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1588770107] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:08:17,919 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:08:17,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 3] imperfect sequences [] total 7 [2021-11-07 02:08:17,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946024188] [2021-11-07 02:08:17,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 02:08:17,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:08:17,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 02:08:17,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:08:17,920 INFO L87 Difference]: Start difference. First operand 131 states and 167 transitions. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 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 02:08:18,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:08:18,478 INFO L93 Difference]: Finished difference Result 449 states and 563 transitions. [2021-11-07 02:08:18,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 02:08:18,480 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 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 45 [2021-11-07 02:08:18,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:08:18,485 INFO L225 Difference]: With dead ends: 449 [2021-11-07 02:08:18,485 INFO L226 Difference]: Without dead ends: 350 [2021-11-07 02:08:18,486 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-11-07 02:08:18,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-11-07 02:08:18,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 135. [2021-11-07 02:08:18,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 128 states have (on average 1.34375) internal successors, (172), 134 states have internal predecessors, (172), 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 02:08:18,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 172 transitions. [2021-11-07 02:08:18,504 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 172 transitions. Word has length 45 [2021-11-07 02:08:18,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:08:18,504 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 172 transitions. [2021-11-07 02:08:18,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 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 02:08:18,505 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 172 transitions. [2021-11-07 02:08:18,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-07 02:08:18,506 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:08:18,507 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:08:18,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 02:08:18,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:08:18,726 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 02:08:18,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:08:18,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1737555954, now seen corresponding path program 1 times [2021-11-07 02:08:18,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:08:18,727 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1230645842] [2021-11-07 02:08:18,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:18,727 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:08:18,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:08:18,728 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:08:18,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 02:08:19,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:19,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 02:08:19,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:19,265 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 02:08:19,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:19,428 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 02:08:19,428 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:08:19,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1230645842] [2021-11-07 02:08:19,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1230645842] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:08:19,429 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:08:19,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 7 [2021-11-07 02:08:19,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920675129] [2021-11-07 02:08:19,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 02:08:19,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:08:19,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 02:08:19,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:08:19,430 INFO L87 Difference]: Start difference. First operand 135 states and 172 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 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 02:08:19,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:08:19,883 INFO L93 Difference]: Finished difference Result 393 states and 496 transitions. [2021-11-07 02:08:19,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 02:08:19,884 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 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 50 [2021-11-07 02:08:19,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:08:19,886 INFO L225 Difference]: With dead ends: 393 [2021-11-07 02:08:19,886 INFO L226 Difference]: Without dead ends: 283 [2021-11-07 02:08:19,887 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-07 02:08:19,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-11-07 02:08:19,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 137. [2021-11-07 02:08:19,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 130 states have (on average 1.3384615384615384) internal successors, (174), 136 states have internal predecessors, (174), 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 02:08:19,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 174 transitions. [2021-11-07 02:08:19,910 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 174 transitions. Word has length 50 [2021-11-07 02:08:19,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:08:19,911 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 174 transitions. [2021-11-07 02:08:19,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 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 02:08:19,912 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 174 transitions. [2021-11-07 02:08:19,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-07 02:08:19,916 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:08:19,916 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:08:19,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 02:08:20,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:08:20,135 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 02:08:20,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:08:20,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1675516340, now seen corresponding path program 1 times [2021-11-07 02:08:20,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:08:20,136 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [649534928] [2021-11-07 02:08:20,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:20,136 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:08:20,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:08:20,137 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:08:20,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 02:08:20,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:20,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:08:20,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:20,689 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 02:08:20,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:20,817 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 02:08:20,817 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:08:20,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [649534928] [2021-11-07 02:08:20,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [649534928] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:08:20,818 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:08:20,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 02:08:20,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637836379] [2021-11-07 02:08:20,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:08:20,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:08:20,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:08:20,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:08:20,820 INFO L87 Difference]: Start difference. First operand 137 states and 174 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 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 02:08:20,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:08:20,933 INFO L93 Difference]: Finished difference Result 349 states and 432 transitions. [2021-11-07 02:08:20,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 02:08:20,934 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 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 50 [2021-11-07 02:08:20,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:08:20,936 INFO L225 Difference]: With dead ends: 349 [2021-11-07 02:08:20,936 INFO L226 Difference]: Without dead ends: 247 [2021-11-07 02:08:20,936 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:08:20,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-11-07 02:08:20,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 137. [2021-11-07 02:08:20,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 130 states have (on average 1.3307692307692307) internal successors, (173), 136 states have internal predecessors, (173), 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 02:08:20,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 173 transitions. [2021-11-07 02:08:20,948 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 173 transitions. Word has length 50 [2021-11-07 02:08:20,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:08:20,949 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 173 transitions. [2021-11-07 02:08:20,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 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 02:08:20,949 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 173 transitions. [2021-11-07 02:08:20,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 02:08:20,957 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:08:20,958 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:08:20,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 02:08:21,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:08:21,174 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 02:08:21,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:08:21,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1963585782, now seen corresponding path program 1 times [2021-11-07 02:08:21,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:08:21,175 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [338088078] [2021-11-07 02:08:21,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:21,175 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:08:21,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:08:21,176 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:08:21,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 02:08:21,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:21,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-07 02:08:21,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:22,159 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 32 treesize of output 24 [2021-11-07 02:08:22,164 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 21 treesize of output 13 [2021-11-07 02:08:22,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:22,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:22,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:22,622 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:08:22,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [338088078] [2021-11-07 02:08:22,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [338088078] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:08:22,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1962873688] [2021-11-07 02:08:22,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:22,623 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:08:22,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:08:22,628 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:08:22,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-07 02:08:23,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:23,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:08:23,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:23,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:08:23,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:23,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:08:23,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1962873688] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:08:23,539 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:08:23,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [8, 8] total 14 [2021-11-07 02:08:23,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125522628] [2021-11-07 02:08:23,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:08:23,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:08:23,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:08:23,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-11-07 02:08:23,541 INFO L87 Difference]: Start difference. First operand 137 states and 173 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 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 02:08:23,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:08:23,782 INFO L93 Difference]: Finished difference Result 411 states and 504 transitions. [2021-11-07 02:08:23,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 02:08:23,782 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 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 52 [2021-11-07 02:08:23,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:08:23,785 INFO L225 Difference]: With dead ends: 411 [2021-11-07 02:08:23,785 INFO L226 Difference]: Without dead ends: 308 [2021-11-07 02:08:23,786 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-11-07 02:08:23,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-11-07 02:08:23,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 137. [2021-11-07 02:08:23,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 130 states have (on average 1.323076923076923) internal successors, (172), 136 states have internal predecessors, (172), 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 02:08:23,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 172 transitions. [2021-11-07 02:08:23,799 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 172 transitions. Word has length 52 [2021-11-07 02:08:23,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:08:23,802 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 172 transitions. [2021-11-07 02:08:23,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 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 02:08:23,802 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 172 transitions. [2021-11-07 02:08:23,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-07 02:08:23,803 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:08:23,803 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] [2021-11-07 02:08:23,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 02:08:24,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-07 02:08:24,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:08:24,220 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 02:08:24,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:08:24,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1322921012, now seen corresponding path program 1 times [2021-11-07 02:08:24,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:08:24,221 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1698050491] [2021-11-07 02:08:24,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:24,221 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:08:24,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:08:24,222 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:08:24,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 02:08:24,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:24,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-07 02:08:24,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:25,708 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:08:25,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 27 [2021-11-07 02:08:25,720 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:08:25,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 16 [2021-11-07 02:08:25,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:25,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:26,963 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-07 02:08:26,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2021-11-07 02:08:26,977 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-11-07 02:08:26,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 23 [2021-11-07 02:08:27,087 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:27,088 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:08:27,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1698050491] [2021-11-07 02:08:27,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1698050491] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:08:27,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1054602379] [2021-11-07 02:08:27,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:27,089 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:08:27,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:08:27,090 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:08:27,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-07 02:08:27,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:27,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-07 02:08:27,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:28,298 INFO L354 Elim1Store]: treesize reduction 19, result has 50.0 percent of original size [2021-11-07 02:08:28,298 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 1 case distinctions, treesize of input 63 treesize of output 58 [2021-11-07 02:08:34,644 WARN L207 SmtUtils]: Spent 6.34 s on a formula simplification. DAG size of input: 21 DAG size of output: 12 [2021-11-07 02:08:34,645 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-07 02:08:34,645 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 1 case distinctions, treesize of input 73 treesize of output 54 [2021-11-07 02:10:08,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 02:10:08,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:10,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 02:10:10,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1054602379] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:10:10,029 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:10:10,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 7] imperfect sequences [11, 10] total 30 [2021-11-07 02:10:10,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111566632] [2021-11-07 02:10:10,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-07 02:10:10,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:10:10,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-07 02:10:10,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2021-11-07 02:10:10,033 INFO L87 Difference]: Start difference. First operand 137 states and 172 transitions. Second operand has 13 states, 13 states have (on average 7.615384615384615) internal successors, (99), 13 states have internal predecessors, (99), 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 02:10:18,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:10:18,676 INFO L93 Difference]: Finished difference Result 211 states and 263 transitions. [2021-11-07 02:10:18,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 02:10:18,679 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.615384615384615) internal successors, (99), 13 states have internal predecessors, (99), 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 53 [2021-11-07 02:10:18,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:10:18,682 INFO L225 Difference]: With dead ends: 211 [2021-11-07 02:10:18,682 INFO L226 Difference]: Without dead ends: 139 [2021-11-07 02:10:18,683 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=168, Invalid=1164, Unknown=0, NotChecked=0, Total=1332 [2021-11-07 02:10:18,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-11-07 02:10:18,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2021-11-07 02:10:18,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 131 states have (on average 1.3206106870229009) internal successors, (173), 137 states have internal predecessors, (173), 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 02:10:18,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 173 transitions. [2021-11-07 02:10:18,700 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 173 transitions. Word has length 53 [2021-11-07 02:10:18,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:10:18,700 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 173 transitions. [2021-11-07 02:10:18,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.615384615384615) internal successors, (99), 13 states have internal predecessors, (99), 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 02:10:18,701 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 173 transitions. [2021-11-07 02:10:18,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-07 02:10:18,702 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:10:18,702 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] [2021-11-07 02:10:18,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 02:10:18,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-07 02:10:19,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:10:19,121 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 02:10:19,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:10:19,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1324768054, now seen corresponding path program 1 times [2021-11-07 02:10:19,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:10:19,123 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1784545432] [2021-11-07 02:10:19,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:10:19,123 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:10:19,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:10:19,124 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:10:19,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 02:10:19,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:10:19,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-07 02:10:19,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:20,510 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:10:20,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 27 [2021-11-07 02:10:20,517 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:10:20,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 16 [2021-11-07 02:10:20,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:10:20,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:21,625 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-07 02:10:21,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2021-11-07 02:10:21,635 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-11-07 02:10:21,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 23 [2021-11-07 02:10:21,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:10:21,711 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:10:21,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1784545432] [2021-11-07 02:10:21,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1784545432] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:10:21,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1027194622] [2021-11-07 02:10:21,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:10:21,712 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:10:21,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:10:21,713 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:10:21,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-07 02:10:22,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:10:22,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-07 02:10:22,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:22,928 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-07 02:10:22,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 17 [2021-11-07 02:10:23,796 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 41 treesize of output 29 [2021-11-07 02:10:23,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 02:10:23,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:24,521 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 210 treesize of output 198 [2021-11-07 02:10:24,847 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 02:10:24,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1027194622] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:10:24,848 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:10:24,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [11, 10] total 31 [2021-11-07 02:10:24,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958578778] [2021-11-07 02:10:24,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 02:10:24,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:10:24,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 02:10:24,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2021-11-07 02:10:24,851 INFO L87 Difference]: Start difference. First operand 138 states and 173 transitions. Second operand has 14 states, 14 states have (on average 6.928571428571429) internal successors, (97), 14 states have internal predecessors, (97), 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 02:10:27,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:10:27,322 INFO L93 Difference]: Finished difference Result 405 states and 514 transitions. [2021-11-07 02:10:27,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 02:10:27,324 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.928571428571429) internal successors, (97), 14 states have internal predecessors, (97), 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 53 [2021-11-07 02:10:27,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:10:27,325 INFO L225 Difference]: With dead ends: 405 [2021-11-07 02:10:27,326 INFO L226 Difference]: Without dead ends: 288 [2021-11-07 02:10:27,327 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=214, Invalid=1346, Unknown=0, NotChecked=0, Total=1560 [2021-11-07 02:10:27,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-11-07 02:10:27,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 144. [2021-11-07 02:10:27,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 137 states have (on average 1.3065693430656935) internal successors, (179), 143 states have internal predecessors, (179), 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 02:10:27,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 179 transitions. [2021-11-07 02:10:27,347 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 179 transitions. Word has length 53 [2021-11-07 02:10:27,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:10:27,347 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 179 transitions. [2021-11-07 02:10:27,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.928571428571429) internal successors, (97), 14 states have internal predecessors, (97), 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 02:10:27,348 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 179 transitions. [2021-11-07 02:10:27,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-07 02:10:27,348 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:10:27,349 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] [2021-11-07 02:10:27,368 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (15)] Ended with exit code 0 [2021-11-07 02:10:27,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 02:10:27,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:10:27,754 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 02:10:27,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:10:27,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1195191880, now seen corresponding path program 1 times [2021-11-07 02:10:27,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:10:27,755 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1687175193] [2021-11-07 02:10:27,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:10:27,755 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:10:27,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:10:27,756 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:10:27,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 02:10:28,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:10:28,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-07 02:10:28,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:29,208 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:10:29,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 27 [2021-11-07 02:10:29,215 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:10:29,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 16 [2021-11-07 02:10:29,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:10:29,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:30,328 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-07 02:10:30,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2021-11-07 02:10:30,338 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-11-07 02:10:30,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 23 [2021-11-07 02:10:30,417 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:10:30,417 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:10:30,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1687175193] [2021-11-07 02:10:30,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1687175193] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:10:30,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [710094233] [2021-11-07 02:10:30,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:10:30,418 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:10:30,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:10:30,418 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:10:30,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-07 02:10:31,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:10:31,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-07 02:10:31,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:31,736 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-07 02:10:31,736 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 1 case distinctions, treesize of input 63 treesize of output 50 [2021-11-07 02:10:31,793 INFO L354 Elim1Store]: treesize reduction 31, result has 50.0 percent of original size [2021-11-07 02:10:31,794 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 1 case distinctions, treesize of input 71 treesize of output 54 [2021-11-07 02:11:56,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 02:11:56,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:11:58,264 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 02:11:58,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [710094233] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:11:58,264 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:11:58,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11, 9] imperfect sequences [11, 10] total 33 [2021-11-07 02:11:58,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981731653] [2021-11-07 02:11:58,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 02:11:58,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:11:58,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 02:11:58,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=960, Unknown=0, NotChecked=0, Total=1056 [2021-11-07 02:11:58,267 INFO L87 Difference]: Start difference. First operand 144 states and 179 transitions. Second operand has 16 states, 16 states have (on average 5.9375) internal successors, (95), 16 states have internal predecessors, (95), 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 02:12:08,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:12:08,988 INFO L93 Difference]: Finished difference Result 422 states and 532 transitions. [2021-11-07 02:12:08,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-07 02:12:08,992 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.9375) internal successors, (95), 16 states have internal predecessors, (95), 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 53 [2021-11-07 02:12:08,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:12:08,994 INFO L225 Difference]: With dead ends: 422 [2021-11-07 02:12:08,994 INFO L226 Difference]: Without dead ends: 331 [2021-11-07 02:12:08,995 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=297, Invalid=1865, Unknown=0, NotChecked=0, Total=2162 [2021-11-07 02:12:08,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-11-07 02:12:09,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 172. [2021-11-07 02:12:09,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 165 states have (on average 1.284848484848485) internal successors, (212), 171 states have internal predecessors, (212), 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 02:12:09,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 212 transitions. [2021-11-07 02:12:09,018 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 212 transitions. Word has length 53 [2021-11-07 02:12:09,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:12:09,018 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 212 transitions. [2021-11-07 02:12:09,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.9375) internal successors, (95), 16 states have internal predecessors, (95), 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 02:12:09,019 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 212 transitions. [2021-11-07 02:12:09,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-07 02:12:09,019 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:12:09,020 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] [2021-11-07 02:12:09,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-07 02:12:09,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 02:12:09,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:12:09,425 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 02:12:09,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:12:09,426 INFO L85 PathProgramCache]: Analyzing trace with hash -515133510, now seen corresponding path program 1 times [2021-11-07 02:12:09,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:12:09,426 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1661989491] [2021-11-07 02:12:09,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:12:09,427 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:12:09,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:12:09,427 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:12:09,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 02:12:10,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:12:10,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-07 02:12:10,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:12:10,935 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:10,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 27 [2021-11-07 02:12:10,943 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:10,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 16 [2021-11-07 02:12:11,049 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:12:11,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:12:11,852 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-07 02:12:11,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2021-11-07 02:12:11,875 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-11-07 02:12:11,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 23 [2021-11-07 02:12:11,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:12:11,967 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:12:11,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1661989491] [2021-11-07 02:12:11,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1661989491] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:12:11,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [233498208] [2021-11-07 02:12:11,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:12:11,968 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:12:11,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:12:11,968 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:12:11,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-07 02:12:13,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:12:13,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-07 02:12:13,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:12:13,321 INFO L354 Elim1Store]: treesize reduction 19, result has 50.0 percent of original size [2021-11-07 02:12:13,321 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 1 case distinctions, treesize of input 33 treesize of output 29 [2021-11-07 02:12:18,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:12:18,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:12:20,337 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 177 treesize of output 169 [2021-11-07 02:12:20,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:12:20,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [233498208] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:12:20,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693909387] [2021-11-07 02:12:20,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:12:20,712 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:12:20,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:12:20,717 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:12:20,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-07 02:12:21,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:12:21,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-07 02:12:21,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:12:23,775 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 41 treesize of output 29 [2021-11-07 02:12:23,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:12:23,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:12:24,482 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:24,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 20 [2021-11-07 02:12:25,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:12:25,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693909387] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:12:25,157 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 02:12:25,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 12, 12, 11, 11] total 48 [2021-11-07 02:12:25,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966958392] [2021-11-07 02:12:25,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-07 02:12:25,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:12:25,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-07 02:12:25,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=2102, Unknown=0, NotChecked=0, Total=2256 [2021-11-07 02:12:25,162 INFO L87 Difference]: Start difference. First operand 172 states and 212 transitions. Second operand has 48 states, 48 states have (on average 4.875) internal successors, (234), 48 states have internal predecessors, (234), 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 02:12:54,785 WARN L207 SmtUtils]: Spent 9.26 s on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2021-11-07 02:13:14,070 WARN L207 SmtUtils]: Spent 18.62 s on a formula simplification. DAG size of input: 81 DAG size of output: 72 [2021-11-07 02:13:31,755 WARN L207 SmtUtils]: Spent 16.94 s on a formula simplification. DAG size of input: 80 DAG size of output: 71 [2021-11-07 02:13:52,126 WARN L207 SmtUtils]: Spent 19.27 s on a formula simplification. DAG size of input: 94 DAG size of output: 75 [2021-11-07 02:14:13,907 WARN L207 SmtUtils]: Spent 21.34 s on a formula simplification. DAG size of input: 100 DAG size of output: 79 [2021-11-07 02:14:34,984 WARN L207 SmtUtils]: Spent 20.23 s on a formula simplification. DAG size of input: 105 DAG size of output: 81 [2021-11-07 02:14:52,881 WARN L207 SmtUtils]: Spent 16.77 s on a formula simplification. DAG size of input: 101 DAG size of output: 82 [2021-11-07 02:15:09,384 WARN L207 SmtUtils]: Spent 16.04 s on a formula simplification. DAG size of input: 88 DAG size of output: 72 [2021-11-07 02:15:28,991 WARN L207 SmtUtils]: Spent 18.95 s on a formula simplification. DAG size of input: 84 DAG size of output: 68 [2021-11-07 02:15:47,328 WARN L207 SmtUtils]: Spent 17.42 s on a formula simplification. DAG size of input: 76 DAG size of output: 65 [2021-11-07 02:16:02,890 WARN L207 SmtUtils]: Spent 15.03 s on a formula simplification. DAG size of input: 77 DAG size of output: 66 [2021-11-07 02:16:19,714 WARN L207 SmtUtils]: Spent 15.77 s on a formula simplification. DAG size of input: 82 DAG size of output: 69 [2021-11-07 02:16:37,724 WARN L207 SmtUtils]: Spent 16.86 s on a formula simplification. DAG size of input: 87 DAG size of output: 71 [2021-11-07 02:16:58,887 WARN L207 SmtUtils]: Spent 19.44 s on a formula simplification. DAG size of input: 95 DAG size of output: 84 [2021-11-07 02:17:11,489 WARN L207 SmtUtils]: Spent 12.01 s on a formula simplification. DAG size of input: 75 DAG size of output: 74 [2021-11-07 02:17:27,201 WARN L207 SmtUtils]: Spent 15.09 s on a formula simplification. DAG size of input: 83 DAG size of output: 72 [2021-11-07 02:17:41,491 WARN L207 SmtUtils]: Spent 13.61 s on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2021-11-07 02:17:54,605 WARN L207 SmtUtils]: Spent 6.02 s on a formula simplification that was a NOOP. DAG size: 63 [2021-11-07 02:18:17,018 WARN L207 SmtUtils]: Spent 21.97 s on a formula simplification. DAG size of input: 81 DAG size of output: 78 [2021-11-07 02:18:39,451 WARN L207 SmtUtils]: Spent 21.77 s on a formula simplification. DAG size of input: 80 DAG size of output: 77 [2021-11-07 02:19:01,051 WARN L207 SmtUtils]: Spent 20.93 s on a formula simplification. DAG size of input: 86 DAG size of output: 80 [2021-11-07 02:19:18,534 WARN L207 SmtUtils]: Spent 16.47 s on a formula simplification. DAG size of input: 85 DAG size of output: 79 [2021-11-07 02:19:26,226 WARN L207 SmtUtils]: Spent 6.10 s on a formula simplification that was a NOOP. DAG size: 66 [2021-11-07 02:19:47,641 WARN L207 SmtUtils]: Spent 17.31 s on a formula simplification. DAG size of input: 94 DAG size of output: 93 [2021-11-07 02:20:06,516 WARN L207 SmtUtils]: Spent 18.25 s on a formula simplification. DAG size of input: 93 DAG size of output: 92 [2021-11-07 02:20:26,251 WARN L207 SmtUtils]: Spent 18.25 s on a formula simplification. DAG size of input: 82 DAG size of output: 81 [2021-11-07 02:20:44,197 WARN L207 SmtUtils]: Spent 17.20 s on a formula simplification. DAG size of input: 81 DAG size of output: 80 [2021-11-07 02:20:45,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:20:45,334 INFO L93 Difference]: Finished difference Result 696 states and 842 transitions. [2021-11-07 02:20:45,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-07 02:20:45,339 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 4.875) internal successors, (234), 48 states have internal predecessors, (234), 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 53 [2021-11-07 02:20:45,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:20:45,341 INFO L225 Difference]: With dead ends: 696 [2021-11-07 02:20:45,342 INFO L226 Difference]: Without dead ends: 573 [2021-11-07 02:20:45,344 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 266 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1209 ImplicationChecksByTransitivity, 487.5s TimeCoverageRelationStatistics Valid=1148, Invalid=5494, Unknown=0, NotChecked=0, Total=6642 [2021-11-07 02:20:45,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2021-11-07 02:20:45,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 201. [2021-11-07 02:20:45,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 194 states have (on average 1.268041237113402) internal successors, (246), 200 states have internal predecessors, (246), 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 02:20:45,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 246 transitions. [2021-11-07 02:20:45,387 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 246 transitions. Word has length 53 [2021-11-07 02:20:45,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:20:45,387 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 246 transitions. [2021-11-07 02:20:45,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 4.875) internal successors, (234), 48 states have internal predecessors, (234), 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 02:20:45,388 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 246 transitions. [2021-11-07 02:20:45,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 02:20:45,388 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:20:45,389 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:20:45,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 02:20:45,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-07 02:20:45,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-07 02:20:46,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:20:46,008 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 02:20:46,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:20:46,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1117845546, now seen corresponding path program 1 times [2021-11-07 02:20:46,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:20:46,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2093797094] [2021-11-07 02:20:46,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:20:46,009 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:20:46,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:20:46,019 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:20:46,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-07 02:20:47,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:20:47,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:20:47,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:20:47,211 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:20:47,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:20:47,360 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:20:47,360 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:20:47,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2093797094] [2021-11-07 02:20:47,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2093797094] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:20:47,360 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:20:47,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 02:20:47,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838059531] [2021-11-07 02:20:47,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:20:47,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:20:47,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:20:47,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:20:47,362 INFO L87 Difference]: Start difference. First operand 201 states and 246 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 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 02:20:47,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:20:47,525 INFO L93 Difference]: Finished difference Result 419 states and 514 transitions. [2021-11-07 02:20:47,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:20:47,526 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 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 61 [2021-11-07 02:20:47,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:20:47,528 INFO L225 Difference]: With dead ends: 419 [2021-11-07 02:20:47,528 INFO L226 Difference]: Without dead ends: 265 [2021-11-07 02:20:47,528 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:20:47,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-11-07 02:20:47,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 201. [2021-11-07 02:20:47,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 194 states have (on average 1.2422680412371134) internal successors, (241), 200 states have internal predecessors, (241), 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 02:20:47,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 241 transitions. [2021-11-07 02:20:47,566 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 241 transitions. Word has length 61 [2021-11-07 02:20:47,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:20:47,566 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 241 transitions. [2021-11-07 02:20:47,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 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 02:20:47,567 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 241 transitions. [2021-11-07 02:20:47,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 02:20:47,568 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:20:47,568 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:20:47,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-07 02:20:47,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:20:47,786 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 02:20:47,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:20:47,786 INFO L85 PathProgramCache]: Analyzing trace with hash -268357848, now seen corresponding path program 2 times [2021-11-07 02:20:47,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:20:47,787 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [144219016] [2021-11-07 02:20:47,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:20:47,787 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:20:47,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:20:47,789 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:20:47,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-07 02:20:48,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-07 02:20:48,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:20:48,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-07 02:20:48,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:20:49,590 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 35 treesize of output 27 [2021-11-07 02:20:49,594 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 27 treesize of output 19 [2021-11-07 02:20:49,675 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-07 02:20:49,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:20:50,240 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-07 02:20:50,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 31 [2021-11-07 02:20:50,250 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-11-07 02:20:50,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2021-11-07 02:20:50,284 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-07 02:20:50,284 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:20:50,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [144219016] [2021-11-07 02:20:50,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [144219016] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:20:50,285 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:20:50,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 11 [2021-11-07 02:20:50,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068621874] [2021-11-07 02:20:50,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 02:20:50,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:20:50,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 02:20:50,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-07 02:20:50,287 INFO L87 Difference]: Start difference. First operand 201 states and 241 transitions. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 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 02:20:52,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:20:52,283 INFO L93 Difference]: Finished difference Result 500 states and 609 transitions. [2021-11-07 02:20:52,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 02:20:52,284 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 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 61 [2021-11-07 02:20:52,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:20:52,286 INFO L225 Difference]: With dead ends: 500 [2021-11-07 02:20:52,286 INFO L226 Difference]: Without dead ends: 390 [2021-11-07 02:20:52,287 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-11-07 02:20:52,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-11-07 02:20:52,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 273. [2021-11-07 02:20:52,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 266 states have (on average 1.2067669172932332) internal successors, (321), 272 states have internal predecessors, (321), 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 02:20:52,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 321 transitions. [2021-11-07 02:20:52,326 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 321 transitions. Word has length 61 [2021-11-07 02:20:52,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:20:52,326 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 321 transitions. [2021-11-07 02:20:52,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 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 02:20:52,327 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 321 transitions. [2021-11-07 02:20:52,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 02:20:52,327 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:20:52,327 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:20:52,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-07 02:20:52,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:20:52,532 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 02:20:52,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:20:52,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1297163236, now seen corresponding path program 1 times [2021-11-07 02:20:52,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:20:52,533 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [270562906] [2021-11-07 02:20:52,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:20:52,533 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:20:52,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:20:52,534 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:20:52,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-07 02:20:53,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:20:53,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:20:53,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:20:53,710 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-07 02:20:53,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:20:53,859 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-07 02:20:53,859 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:20:53,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [270562906] [2021-11-07 02:20:53,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [270562906] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:20:53,859 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:20:53,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 02:20:53,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875653506] [2021-11-07 02:20:53,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:20:53,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:20:53,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:20:53,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:20:53,861 INFO L87 Difference]: Start difference. First operand 273 states and 321 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 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 02:20:53,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:20:53,989 INFO L93 Difference]: Finished difference Result 386 states and 463 transitions. [2021-11-07 02:20:53,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:20:53,990 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 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 61 [2021-11-07 02:20:53,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:20:53,991 INFO L225 Difference]: With dead ends: 386 [2021-11-07 02:20:53,992 INFO L226 Difference]: Without dead ends: 204 [2021-11-07 02:20:53,992 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:20:53,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-11-07 02:20:54,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2021-11-07 02:20:54,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 197 states have (on average 1.2081218274111676) internal successors, (238), 203 states have internal predecessors, (238), 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 02:20:54,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 238 transitions. [2021-11-07 02:20:54,025 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 238 transitions. Word has length 61 [2021-11-07 02:20:54,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:20:54,025 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 238 transitions. [2021-11-07 02:20:54,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 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 02:20:54,026 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 238 transitions. [2021-11-07 02:20:54,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 02:20:54,027 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:20:54,027 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:20:54,052 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2021-11-07 02:20:54,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:20:54,250 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 02:20:54,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:20:54,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1659914854, now seen corresponding path program 1 times [2021-11-07 02:20:54,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:20:54,250 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1610057018] [2021-11-07 02:20:54,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:20:54,251 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:20:54,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:20:54,251 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:20:54,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-07 02:20:55,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:20:55,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:20:55,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:20:55,513 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-07 02:20:55,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:20:55,666 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-07 02:20:55,666 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:20:55,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1610057018] [2021-11-07 02:20:55,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1610057018] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:20:55,667 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:20:55,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 02:20:55,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38851192] [2021-11-07 02:20:55,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:20:55,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:20:55,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:20:55,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:20:55,668 INFO L87 Difference]: Start difference. First operand 204 states and 238 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 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 02:20:55,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:20:55,775 INFO L93 Difference]: Finished difference Result 317 states and 376 transitions. [2021-11-07 02:20:55,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:20:55,776 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 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 61 [2021-11-07 02:20:55,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:20:55,777 INFO L225 Difference]: With dead ends: 317 [2021-11-07 02:20:55,777 INFO L226 Difference]: Without dead ends: 167 [2021-11-07 02:20:55,778 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:20:55,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-11-07 02:20:55,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 164. [2021-11-07 02:20:55,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 157 states have (on average 1.2229299363057324) internal successors, (192), 163 states have internal predecessors, (192), 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 02:20:55,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 192 transitions. [2021-11-07 02:20:55,799 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 192 transitions. Word has length 61 [2021-11-07 02:20:55,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:20:55,800 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 192 transitions. [2021-11-07 02:20:55,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 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 02:20:55,800 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 192 transitions. [2021-11-07 02:20:55,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 02:20:55,800 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:20:55,800 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:20:55,816 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-07 02:20:56,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:20:56,001 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 02:20:56,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:20:56,001 INFO L85 PathProgramCache]: Analyzing trace with hash -414228359, now seen corresponding path program 1 times [2021-11-07 02:20:56,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:20:56,002 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1041998831] [2021-11-07 02:20:56,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:20:56,002 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:20:56,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:20:56,003 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:20:56,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-07 02:20:57,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:20:57,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-07 02:20:57,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:20:59,245 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 02:20:59,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:21:05,001 INFO L354 Elim1Store]: treesize reduction 21, result has 79.6 percent of original size [2021-11-07 02:21:05,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 72 treesize of output 125 [2021-11-07 02:21:05,536 INFO L354 Elim1Store]: treesize reduction 8, result has 88.1 percent of original size [2021-11-07 02:21:05,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 113 treesize of output 143 [2021-11-07 02:21:07,851 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 02:21:07,852 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:21:07,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1041998831] [2021-11-07 02:21:07,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1041998831] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:21:07,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [478875966] [2021-11-07 02:21:07,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:21:07,852 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:21:07,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:21:07,853 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:21:07,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b05dceb-ed38-4890-a3ad-31ac8bd70ec8/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-07 02:21:09,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:21:09,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 61 conjunts are in the unsatisfiable core [2021-11-07 02:21:09,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:21:10,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:10,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-11-07 02:21:10,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:10,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:10,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-11-07 02:21:14,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:14,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:21:14,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:21:14,752 INFO L354 Elim1Store]: treesize reduction 34, result has 40.4 percent of original size [2021-11-07 02:21:14,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 7 case distinctions, treesize of input 119 treesize of output 86 [2021-11-07 02:21:15,305 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:21:15,305 INFO L328 TraceCheckSpWp]: Computing backward predicates...