./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_prev_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_prev_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 0aec0bb8b8715e014581c4eef5e1e25c7e0452a528f8abdf2f2a721d17b0fa7f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:17:10,044 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:17:10,046 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:17:10,078 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:17:10,079 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:17:10,080 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:17:10,082 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:17:10,089 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:17:10,093 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:17:10,098 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:17:10,100 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:17:10,103 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:17:10,103 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:17:10,106 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:17:10,109 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:17:10,115 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:17:10,117 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:17:10,119 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:17:10,124 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:17:10,129 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:17:10,133 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:17:10,134 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:17:10,138 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:17:10,139 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:17:10,145 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:17:10,145 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:17:10,146 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:17:10,153 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:17:10,154 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:17:10,155 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:17:10,156 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:17:10,157 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:17:10,159 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:17:10,160 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:17:10,162 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:17:10,162 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:17:10,163 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:17:10,163 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:17:10,163 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:17:10,164 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:17:10,165 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:17:10,166 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-12 22:17:10,217 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:17:10,217 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:17:10,219 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:17:10,219 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:17:10,219 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:17:10,220 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:17:10,220 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:17:10,220 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 22:17:10,227 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:17:10,227 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:17:10,228 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 22:17:10,229 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 22:17:10,229 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:17:10,229 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 22:17:10,230 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 22:17:10,230 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 22:17:10,231 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:17:10,231 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 22:17:10,231 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:17:10,233 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:17:10,233 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:17:10,238 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:17:10,239 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:17:10,239 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:17:10,239 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:17:10,240 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:17:10,240 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:17:10,240 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:17:10,240 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:17:10,241 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:17:10,241 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:17:10,241 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:17:10,241 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 22:17:10,242 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 22:17:10,242 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:17:10,243 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:17:10,244 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:17:10,244 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_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0aec0bb8b8715e014581c4eef5e1e25c7e0452a528f8abdf2f2a721d17b0fa7f [2021-11-12 22:17:10,559 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:17:10,586 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:17:10,590 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:17:10,591 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:17:10,592 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:17:10,593 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/aws-c-common/aws_linked_list_prev_harness.i [2021-11-12 22:17:10,661 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/data/6f07e6eff/e09df2beb0c94d54b79b89030bf2876c/FLAGdbc1cca01 [2021-11-12 22:17:11,447 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:17:11,447 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/sv-benchmarks/c/aws-c-common/aws_linked_list_prev_harness.i [2021-11-12 22:17:11,492 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/data/6f07e6eff/e09df2beb0c94d54b79b89030bf2876c/FLAGdbc1cca01 [2021-11-12 22:17:11,519 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/data/6f07e6eff/e09df2beb0c94d54b79b89030bf2876c [2021-11-12 22:17:11,523 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:17:11,527 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:17:11,529 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:17:11,529 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:17:11,534 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:17:11,535 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:17:11" (1/1) ... [2021-11-12 22:17:11,537 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@340519a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:17:11, skipping insertion in model container [2021-11-12 22:17:11,537 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:17:11" (1/1) ... [2021-11-12 22:17:11,545 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:17:11,671 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:17:12,034 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_b30406b6-616f-47ba-8428-2160be9b880a/sv-benchmarks/c/aws-c-common/aws_linked_list_prev_harness.i[4494,4507] [2021-11-12 22:17:12,041 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_b30406b6-616f-47ba-8428-2160be9b880a/sv-benchmarks/c/aws-c-common/aws_linked_list_prev_harness.i[4554,4567] [2021-11-12 22:17:12,063 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-12 22:17:12,067 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-12 22:17:12,833 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:17:12,834 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:17:12,834 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:17:12,835 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:17:12,840 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:17:12,878 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:17:12,879 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:17:12,887 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:17:12,891 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:17:12,893 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:17:12,894 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:17:12,895 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:17:12,896 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:17:13,313 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-12 22:17:13,315 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-12 22:17:13,316 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-12 22:17:13,318 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-12 22:17:13,319 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-12 22:17:13,320 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-12 22:17:13,321 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-12 22:17:13,323 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-12 22:17:13,324 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-12 22:17:13,330 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-12 22:17:13,475 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-12 22:17:13,515 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:17:13,532 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-12 22:17:13,533 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1c0361c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:17:13, skipping insertion in model container [2021-11-12 22:17:13,533 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:17:13,533 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 22:17:13,535 INFO L158 Benchmark]: Toolchain (without parser) took 2007.62ms. Allocated memory was 107.0MB in the beginning and 148.9MB in the end (delta: 41.9MB). Free memory was 61.5MB in the beginning and 117.2MB in the end (delta: -55.8MB). Peak memory consumption was 17.4MB. Max. memory is 16.1GB. [2021-11-12 22:17:13,536 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 107.0MB. Free memory is still 85.0MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:17:13,537 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2004.25ms. Allocated memory was 107.0MB in the beginning and 148.9MB in the end (delta: 41.9MB). Free memory was 61.3MB in the beginning and 117.3MB in the end (delta: -56.0MB). Peak memory consumption was 17.4MB. Max. memory is 16.1GB. [2021-11-12 22:17:13,539 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 107.0MB. Free memory is still 85.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2004.25ms. Allocated memory was 107.0MB in the beginning and 148.9MB in the end (delta: 41.9MB). Free memory was 61.3MB in the beginning and 117.3MB in the end (delta: -56.0MB). Peak memory consumption was 17.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 7039]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_prev_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 0aec0bb8b8715e014581c4eef5e1e25c7e0452a528f8abdf2f2a721d17b0fa7f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:17:15,814 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:17:15,818 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:17:15,872 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:17:15,873 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:17:15,878 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:17:15,880 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:17:15,885 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:17:15,889 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:17:15,897 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:17:15,899 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:17:15,901 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:17:15,901 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:17:15,904 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:17:15,906 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:17:15,910 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:17:15,912 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:17:15,915 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:17:15,917 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:17:15,925 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:17:15,927 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:17:15,928 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:17:15,931 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:17:15,933 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:17:15,943 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:17:15,944 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:17:15,944 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:17:15,946 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:17:15,947 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:17:15,948 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:17:15,948 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:17:15,949 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:17:15,951 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:17:15,952 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:17:15,953 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:17:15,954 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:17:15,955 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:17:15,955 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:17:15,969 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:17:15,971 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:17:15,971 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:17:15,977 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-12 22:17:16,025 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:17:16,026 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:17:16,027 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:17:16,027 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:17:16,028 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:17:16,028 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:17:16,028 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:17:16,028 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:17:16,029 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:17:16,029 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:17:16,031 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:17:16,032 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:17:16,032 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:17:16,032 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:17:16,033 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:17:16,033 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:17:16,033 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 22:17:16,033 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 22:17:16,033 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:17:16,034 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:17:16,034 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:17:16,034 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:17:16,035 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 22:17:16,035 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:17:16,035 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:17:16,035 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:17:16,036 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:17:16,036 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:17:16,036 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 22:17:16,036 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 22:17:16,037 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:17:16,037 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:17:16,037 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:17:16,037 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_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0aec0bb8b8715e014581c4eef5e1e25c7e0452a528f8abdf2f2a721d17b0fa7f [2021-11-12 22:17:16,467 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:17:16,489 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:17:16,492 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:17:16,494 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:17:16,494 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:17:16,496 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/aws-c-common/aws_linked_list_prev_harness.i [2021-11-12 22:17:16,563 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/data/3e7c06d25/93188d5d45e5401294fbbbf74342f909/FLAGbfde5c1a6 [2021-11-12 22:17:17,449 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:17:17,451 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/sv-benchmarks/c/aws-c-common/aws_linked_list_prev_harness.i [2021-11-12 22:17:17,490 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/data/3e7c06d25/93188d5d45e5401294fbbbf74342f909/FLAGbfde5c1a6 [2021-11-12 22:17:17,911 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/data/3e7c06d25/93188d5d45e5401294fbbbf74342f909 [2021-11-12 22:17:17,926 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:17:17,928 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:17:17,932 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:17:17,932 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:17:17,934 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:17:17,935 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:17:17" (1/1) ... [2021-11-12 22:17:17,936 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2190a331 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:17:17, skipping insertion in model container [2021-11-12 22:17:17,936 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:17:17" (1/1) ... [2021-11-12 22:17:17,943 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:17:18,072 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:17:18,373 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_b30406b6-616f-47ba-8428-2160be9b880a/sv-benchmarks/c/aws-c-common/aws_linked_list_prev_harness.i[4494,4507] [2021-11-12 22:17:18,383 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_b30406b6-616f-47ba-8428-2160be9b880a/sv-benchmarks/c/aws-c-common/aws_linked_list_prev_harness.i[4554,4567] [2021-11-12 22:17:18,415 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-12 22:17:18,423 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-12 22:17:19,781 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:17:19,783 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:17:19,784 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:17:19,784 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:17:19,786 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:17:19,814 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:17:19,815 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:17:19,817 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:17:19,817 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:17:19,819 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:17:19,820 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:17:19,821 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:17:19,821 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:17:20,284 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-12 22:17:20,287 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-12 22:17:20,288 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-12 22:17:20,290 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-12 22:17:20,292 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-12 22:17:20,293 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-12 22:17:20,294 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-12 22:17:20,295 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-12 22:17:20,298 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-12 22:17:20,299 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-12 22:17:20,453 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-12 22:17:20,482 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:17:20,505 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 22:17:20,543 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:17:20,547 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_b30406b6-616f-47ba-8428-2160be9b880a/sv-benchmarks/c/aws-c-common/aws_linked_list_prev_harness.i[4494,4507] [2021-11-12 22:17:20,547 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_b30406b6-616f-47ba-8428-2160be9b880a/sv-benchmarks/c/aws-c-common/aws_linked_list_prev_harness.i[4554,4567] [2021-11-12 22:17:20,549 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-12 22:17:20,549 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-12 22:17:20,585 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:17:20,585 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:17:20,586 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:17:20,586 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:17:20,587 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:17:20,594 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:17:20,595 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:17:20,596 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:17:20,597 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:17:20,598 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:17:20,598 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:17:20,599 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:17:20,599 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:17:20,634 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-12 22:17:20,635 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-12 22:17:20,636 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-12 22:17:20,637 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-12 22:17:20,638 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-12 22:17:20,639 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-12 22:17:20,639 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-12 22:17:20,640 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-12 22:17:20,640 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-12 22:17:20,641 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-12 22:17:20,664 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-12 22:17:20,694 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:17:20,702 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:17:20,751 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_b30406b6-616f-47ba-8428-2160be9b880a/sv-benchmarks/c/aws-c-common/aws_linked_list_prev_harness.i[4494,4507] [2021-11-12 22:17:20,754 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_b30406b6-616f-47ba-8428-2160be9b880a/sv-benchmarks/c/aws-c-common/aws_linked_list_prev_harness.i[4554,4567] [2021-11-12 22:17:20,769 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-12 22:17:20,770 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-12 22:17:20,812 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:17:20,813 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:17:20,813 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:17:20,813 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:17:20,814 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:17:20,820 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:17:20,820 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:17:20,821 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:17:20,822 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:17:20,823 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:17:20,823 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:17:20,824 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:17:20,824 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:17:20,858 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-12 22:17:20,859 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-12 22:17:20,859 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-12 22:17:20,860 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-12 22:17:20,860 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-12 22:17:20,861 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-12 22:17:20,861 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-12 22:17:20,862 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-12 22:17:20,862 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-12 22:17:20,863 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-12 22:17:20,883 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-12 22:17:20,897 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:17:21,280 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:17:21,281 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:17:21 WrapperNode [2021-11-12 22:17:21,281 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:17:21,282 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:17:21,283 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:17:21,283 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:17:21,290 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:17:21" (1/1) ... [2021-11-12 22:17:21,427 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:17:21" (1/1) ... [2021-11-12 22:17:21,481 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:17:21,482 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:17:21,482 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:17:21,483 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:17:21,492 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:17:21" (1/1) ... [2021-11-12 22:17:21,492 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:17:21" (1/1) ... [2021-11-12 22:17:21,506 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:17:21" (1/1) ... [2021-11-12 22:17:21,507 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:17:21" (1/1) ... [2021-11-12 22:17:21,530 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:17:21" (1/1) ... [2021-11-12 22:17:21,545 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:17:21" (1/1) ... [2021-11-12 22:17:21,550 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:17:21" (1/1) ... [2021-11-12 22:17:21,570 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:17:21,576 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:17:21,577 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:17:21,577 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:17:21,579 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:17:21" (1/1) ... [2021-11-12 22:17:21,587 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:17:21,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:17:21,612 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:17:21,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:17:21,669 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-12 22:17:21,669 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 22:17:21,669 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-12 22:17:21,670 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-12 22:17:21,670 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2021-11-12 22:17:21,670 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2021-11-12 22:17:21,670 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-12 22:17:21,671 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:17:21,671 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:17:21,671 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-12 22:17:21,672 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-12 22:17:21,672 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:17:21,672 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-12 22:17:21,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-12 22:17:21,672 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_prev_is_valid [2021-11-12 22:17:21,672 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_prev_is_valid [2021-11-12 22:17:22,287 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:17:22,287 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-12 22:17:22,289 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:17:22 BoogieIcfgContainer [2021-11-12 22:17:22,289 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:17:22,291 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:17:22,291 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:17:22,294 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:17:22,295 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:17:17" (1/3) ... [2021-11-12 22:17:22,295 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7047d2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:17:22, skipping insertion in model container [2021-11-12 22:17:22,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:17:21" (2/3) ... [2021-11-12 22:17:22,296 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7047d2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:17:22, skipping insertion in model container [2021-11-12 22:17:22,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:17:22" (3/3) ... [2021-11-12 22:17:22,297 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_prev_harness.i [2021-11-12 22:17:22,303 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:17:22,304 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 22:17:22,351 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:17:22,359 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 22:17:22,374 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 22:17:22,392 INFO L276 IsEmpty]: Start isEmpty. Operand has 50 states, 32 states have (on average 1.21875) internal successors, (39), 33 states have internal predecessors, (39), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-12 22:17:22,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-12 22:17:22,398 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:17:22,399 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:17:22,399 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:17:22,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:17:22,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1117195627, now seen corresponding path program 1 times [2021-11-12 22:17:22,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:17:22,419 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [884030904] [2021-11-12 22:17:22,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:17:22,420 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:17:22,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:17:22,424 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:17:22,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 22:17:22,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:17:22,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-12 22:17:22,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:17:22,826 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:17:22,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:17:22,925 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 22:17:22,925 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:17:22,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [884030904] [2021-11-12 22:17:22,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [884030904] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:17:22,927 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:17:22,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-12 22:17:22,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904355929] [2021-11-12 22:17:22,930 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:17:22,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 22:17:22,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:17:22,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 22:17:22,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 22:17:22,963 INFO L87 Difference]: Start difference. First operand has 50 states, 32 states have (on average 1.21875) internal successors, (39), 33 states have internal predecessors, (39), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-12 22:17:22,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:17:22,996 INFO L93 Difference]: Finished difference Result 94 states and 124 transitions. [2021-11-12 22:17:22,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 22:17:23,000 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-11-12 22:17:23,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:17:23,016 INFO L225 Difference]: With dead ends: 94 [2021-11-12 22:17:23,016 INFO L226 Difference]: Without dead ends: 45 [2021-11-12 22:17:23,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 22:17:23,025 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.82ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-12 22:17:23,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 5.82ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-12 22:17:23,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-12 22:17:23,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-11-12 22:17:23,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 29 states have internal predecessors, (33), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-12 22:17:23,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2021-11-12 22:17:23,068 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 28 [2021-11-12 22:17:23,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:17:23,069 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2021-11-12 22:17:23,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-12 22:17:23,070 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2021-11-12 22:17:23,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-12 22:17:23,072 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:17:23,072 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:17:23,093 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 22:17:23,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:17:23,289 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:17:23,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:17:23,290 INFO L85 PathProgramCache]: Analyzing trace with hash 96127273, now seen corresponding path program 1 times [2021-11-12 22:17:23,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:17:23,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2066252259] [2021-11-12 22:17:23,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:17:23,294 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:17:23,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:17:23,295 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:17:23,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 22:17:23,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:17:23,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-12 22:17:23,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:17:26,039 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:17:26,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:17:40,116 WARN L227 SmtUtils]: Spent 10.10s on a formula simplification that was a NOOP. DAG size: 24 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:17:50,653 WARN L227 SmtUtils]: Spent 10.11s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:17:56,496 INFO L354 Elim1Store]: treesize reduction 23, result has 80.0 percent of original size [2021-11-12 22:17:56,498 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 80 treesize of output 135 [2021-11-12 22:17:57,040 INFO L354 Elim1Store]: treesize reduction 12, result has 84.8 percent of original size [2021-11-12 22:17:57,041 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 123 treesize of output 147 [2021-11-12 22:17:58,331 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:17:58,331 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:17:58,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2066252259] [2021-11-12 22:17:58,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2066252259] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:17:58,332 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:17:58,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [15] total 29 [2021-11-12 22:17:58,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224222331] [2021-11-12 22:17:58,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:17:58,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-12 22:17:58,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:17:58,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-12 22:17:58,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=726, Unknown=1, NotChecked=0, Total=812 [2021-11-12 22:17:58,336 INFO L87 Difference]: Start difference. First operand 45 states and 56 transitions. Second operand has 17 states, 14 states have (on average 1.5) internal successors, (21), 13 states have internal predecessors, (21), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-12 22:17:59,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:17:59,123 INFO L93 Difference]: Finished difference Result 84 states and 109 transitions. [2021-11-12 22:17:59,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-12 22:17:59,124 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 1.5) internal successors, (21), 13 states have internal predecessors, (21), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-11-12 22:17:59,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:17:59,127 INFO L225 Difference]: With dead ends: 84 [2021-11-12 22:17:59,127 INFO L226 Difference]: Without dead ends: 82 [2021-11-12 22:17:59,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 25.5s TimeCoverageRelationStatistics Valid=105, Invalid=886, Unknown=1, NotChecked=0, Total=992 [2021-11-12 22:17:59,130 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 29 mSDsluCounter, 781 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 459.93ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 856 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.68ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 528.96ms IncrementalHoareTripleChecker+Time [2021-11-12 22:17:59,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 856 Invalid, 306 Unknown, 0 Unchecked, 12.68ms Time], IncrementalHoareTripleChecker [1 Valid, 213 Invalid, 0 Unknown, 92 Unchecked, 528.96ms Time] [2021-11-12 22:17:59,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-11-12 22:17:59,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 66. [2021-11-12 22:17:59,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 45 states have internal predecessors, (49), 15 states have call successors, (15), 6 states have call predecessors, (15), 8 states have return successors, (18), 14 states have call predecessors, (18), 14 states have call successors, (18) [2021-11-12 22:17:59,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 82 transitions. [2021-11-12 22:17:59,148 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 82 transitions. Word has length 28 [2021-11-12 22:17:59,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:17:59,149 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 82 transitions. [2021-11-12 22:17:59,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 1.5) internal successors, (21), 13 states have internal predecessors, (21), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-12 22:17:59,149 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 82 transitions. [2021-11-12 22:17:59,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-12 22:17:59,150 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:17:59,151 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:17:59,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 22:17:59,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:17:59,366 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:17:59,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:17:59,367 INFO L85 PathProgramCache]: Analyzing trace with hash -713219353, now seen corresponding path program 1 times [2021-11-12 22:17:59,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:17:59,368 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [246053774] [2021-11-12 22:17:59,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:17:59,368 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:17:59,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:17:59,369 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:17:59,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 22:17:59,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:17:59,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-12 22:17:59,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:18:01,330 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:18:01,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:18:04,153 INFO L354 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-11-12 22:18:04,154 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 40 treesize of output 35 [2021-11-12 22:18:04,161 INFO L354 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2021-11-12 22:18:04,161 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 19 [2021-11-12 22:18:04,174 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:18:04,175 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:18:04,175 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [246053774] [2021-11-12 22:18:04,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [246053774] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:18:04,175 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [70142153] [2021-11-12 22:18:04,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:18:04,176 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:18:04,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:18:04,182 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:18:04,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-12 22:18:04,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:18:04,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-12 22:18:04,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:18:05,250 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:18:05,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:18:08,063 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:18:08,064 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 40 treesize of output 43 [2021-11-12 22:18:08,085 INFO L354 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-11-12 22:18:08,085 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 39 treesize of output 34 [2021-11-12 22:18:08,127 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:18:08,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [70142153] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:18:08,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96648306] [2021-11-12 22:18:08,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:18:08,128 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:18:08,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:18:08,150 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:18:08,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-12 22:18:08,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:18:08,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-12 22:18:08,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:18:09,099 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:18:09,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:18:11,789 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:18:11,789 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 40 treesize of output 43 [2021-11-12 22:18:11,809 INFO L354 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-11-12 22:18:11,810 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 39 treesize of output 34 [2021-11-12 22:18:11,839 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:18:11,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96648306] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:18:11,840 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:18:11,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13, 11, 13, 11] total 20 [2021-11-12 22:18:11,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513685385] [2021-11-12 22:18:11,840 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:18:11,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-12 22:18:11,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:18:11,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-12 22:18:11,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-11-12 22:18:11,842 INFO L87 Difference]: Start difference. First operand 66 states and 82 transitions. Second operand has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 20 states have internal predecessors, (35), 5 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-12 22:18:28,923 WARN L227 SmtUtils]: Spent 16.34s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:18:54,363 WARN L227 SmtUtils]: Spent 24.61s on a formula simplification. DAG size of input: 38 DAG size of output: 35 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:18:54,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:18:54,776 INFO L93 Difference]: Finished difference Result 132 states and 164 transitions. [2021-11-12 22:18:54,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-12 22:18:54,777 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 20 states have internal predecessors, (35), 5 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 28 [2021-11-12 22:18:54,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:18:54,779 INFO L225 Difference]: With dead ends: 132 [2021-11-12 22:18:54,779 INFO L226 Difference]: Without dead ends: 81 [2021-11-12 22:18:54,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 140 SyntacticMatches, 8 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 44.5s TimeCoverageRelationStatistics Valid=221, Invalid=901, Unknown=0, NotChecked=0, Total=1122 [2021-11-12 22:18:54,782 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 63 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 525.93ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.33ms SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 596.26ms IncrementalHoareTripleChecker+Time [2021-11-12 22:18:54,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 255 Invalid, 253 Unknown, 0 Unchecked, 3.33ms Time], IncrementalHoareTripleChecker [28 Valid, 129 Invalid, 0 Unknown, 96 Unchecked, 596.26ms Time] [2021-11-12 22:18:54,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-12 22:18:54,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 77. [2021-11-12 22:18:54,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 52 states have (on average 1.1730769230769231) internal successors, (61), 55 states have internal predecessors, (61), 15 states have call successors, (15), 7 states have call predecessors, (15), 9 states have return successors, (19), 14 states have call predecessors, (19), 14 states have call successors, (19) [2021-11-12 22:18:54,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 95 transitions. [2021-11-12 22:18:54,797 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 95 transitions. Word has length 28 [2021-11-12 22:18:54,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:18:54,798 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 95 transitions. [2021-11-12 22:18:54,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 20 states have internal predecessors, (35), 5 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-12 22:18:54,798 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 95 transitions. [2021-11-12 22:18:54,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-12 22:18:54,800 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:18:54,800 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:18:54,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-12 22:18:55,023 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-12 22:18:55,215 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (5)] Ended with exit code 0 [2021-11-12 22:18:55,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:18:55,413 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:18:55,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:18:55,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1106246363, now seen corresponding path program 1 times [2021-11-12 22:18:55,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:18:55,415 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [638311448] [2021-11-12 22:18:55,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:18:55,415 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:18:55,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:18:55,416 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:18:55,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 22:18:55,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:18:55,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:18:55,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:18:55,647 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:18:55,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:18:55,808 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:18:55,809 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:18:55,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [638311448] [2021-11-12 22:18:55,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [638311448] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:18:55,809 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:18:55,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-12 22:18:55,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018546248] [2021-11-12 22:18:55,809 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:18:55,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:18:55,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:18:55,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:18:55,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:18:55,811 INFO L87 Difference]: Start difference. First operand 77 states and 95 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-12 22:18:55,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:18:55,871 INFO L93 Difference]: Finished difference Result 149 states and 179 transitions. [2021-11-12 22:18:55,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:18:55,872 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2021-11-12 22:18:55,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:18:55,874 INFO L225 Difference]: With dead ends: 149 [2021-11-12 22:18:55,874 INFO L226 Difference]: Without dead ends: 67 [2021-11-12 22:18:55,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:18:55,876 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 12 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 42.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.41ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 49.53ms IncrementalHoareTripleChecker+Time [2021-11-12 22:18:55,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 191 Invalid, 25 Unknown, 0 Unchecked, 1.41ms Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 49.53ms Time] [2021-11-12 22:18:55,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-11-12 22:18:55,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 61. [2021-11-12 22:18:55,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 41 states have (on average 1.146341463414634) internal successors, (47), 43 states have internal predecessors, (47), 12 states have call successors, (12), 6 states have call predecessors, (12), 7 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2021-11-12 22:18:55,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2021-11-12 22:18:55,887 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 28 [2021-11-12 22:18:55,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:18:55,887 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2021-11-12 22:18:55,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-12 22:18:55,888 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2021-11-12 22:18:55,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-12 22:18:55,889 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:18:55,889 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:18:55,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 22:18:56,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:18:56,108 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:18:56,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:18:56,109 INFO L85 PathProgramCache]: Analyzing trace with hash 695086179, now seen corresponding path program 1 times [2021-11-12 22:18:56,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:18:56,110 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2012221297] [2021-11-12 22:18:56,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:18:56,110 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:18:56,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:18:56,111 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:18:56,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 22:18:56,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:18:56,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-12 22:18:56,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:18:58,647 INFO L354 Elim1Store]: treesize reduction 85, result has 43.0 percent of original size [2021-11-12 22:18:58,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 221 treesize of output 174 [2021-11-12 22:18:58,820 INFO L354 Elim1Store]: treesize reduction 59, result has 47.8 percent of original size [2021-11-12 22:18:58,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 145 treesize of output 133 [2021-11-12 22:18:58,967 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:18:58,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:19:02,763 INFO L354 Elim1Store]: treesize reduction 49, result has 2.0 percent of original size [2021-11-12 22:19:02,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 3 case distinctions, treesize of input 136 treesize of output 1 [2021-11-12 22:19:16,267 WARN L227 SmtUtils]: Spent 8.74s on a formula simplification. DAG size of input: 72 DAG size of output: 65 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-12 22:19:16,267 INFO L354 Elim1Store]: treesize reduction 27, result has 84.6 percent of original size [2021-11-12 22:19:16,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 136 treesize of output 223 [2021-11-12 22:19:17,239 INFO L354 Elim1Store]: treesize reduction 29, result has 77.2 percent of original size [2021-11-12 22:19:17,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 239 treesize of output 236 [2021-11-12 22:19:28,533 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:19:28,533 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:19:28,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2012221297] [2021-11-12 22:19:28,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2012221297] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:19:28,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [715708058] [2021-11-12 22:19:28,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:19:28,534 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:19:28,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:19:28,535 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:19:28,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-12 22:19:28,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:19:28,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-12 22:19:28,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:19:30,116 INFO L354 Elim1Store]: treesize reduction 85, result has 43.0 percent of original size [2021-11-12 22:19:30,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 221 treesize of output 174 [2021-11-12 22:19:30,333 INFO L354 Elim1Store]: treesize reduction 59, result has 47.8 percent of original size [2021-11-12 22:19:30,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 145 treesize of output 133 [2021-11-12 22:19:30,348 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:19:30,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:19:42,091 WARN L227 SmtUtils]: Spent 10.22s on a formula simplification. DAG size of input: 29 DAG size of output: 1 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-12 22:19:42,091 INFO L354 Elim1Store]: treesize reduction 49, result has 2.0 percent of original size [2021-11-12 22:19:42,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 3 case distinctions, treesize of input 136 treesize of output 1 [2021-11-12 22:19:50,962 WARN L227 SmtUtils]: Spent 8.78s on a formula simplification. DAG size of input: 72 DAG size of output: 65 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-12 22:19:50,962 INFO L354 Elim1Store]: treesize reduction 27, result has 84.6 percent of original size [2021-11-12 22:19:50,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 136 treesize of output 223 [2021-11-12 22:19:51,738 INFO L354 Elim1Store]: treesize reduction 29, result has 77.2 percent of original size [2021-11-12 22:19:51,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 239 treesize of output 236 [2021-11-12 22:19:56,847 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:19:56,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [715708058] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:19:56,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322867525] [2021-11-12 22:19:56,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:19:56,848 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:19:56,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:19:56,849 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:19:56,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-12 22:19:56,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:19:56,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-12 22:19:56,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:19:58,191 INFO L354 Elim1Store]: treesize reduction 85, result has 43.0 percent of original size [2021-11-12 22:19:58,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 221 treesize of output 174 [2021-11-12 22:19:58,383 INFO L354 Elim1Store]: treesize reduction 59, result has 47.8 percent of original size [2021-11-12 22:19:58,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 145 treesize of output 133 [2021-11-12 22:19:58,399 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:19:58,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:19:59,804 INFO L354 Elim1Store]: treesize reduction 49, result has 2.0 percent of original size [2021-11-12 22:19:59,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 3 case distinctions, treesize of input 136 treesize of output 1 [2021-11-12 22:20:12,648 WARN L227 SmtUtils]: Spent 12.73s on a formula simplification. DAG size of input: 72 DAG size of output: 67 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-12 22:20:12,649 INFO L354 Elim1Store]: treesize reduction 23, result has 86.9 percent of original size [2021-11-12 22:20:12,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 136 treesize of output 227 [2021-11-12 22:20:13,566 INFO L354 Elim1Store]: treesize reduction 20, result has 84.3 percent of original size [2021-11-12 22:20:13,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 243 treesize of output 249 [2021-11-12 22:20:50,501 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:20:50,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322867525] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:20:50,502 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:20:50,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 18, 16, 18, 16] total 31 [2021-11-12 22:20:50,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013990501] [2021-11-12 22:20:50,502 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:20:50,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-12 22:20:50,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:20:50,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-12 22:20:50,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=847, Unknown=2, NotChecked=0, Total=930 [2021-11-12 22:20:50,505 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 31 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 23 states have internal predecessors, (57), 8 states have call successors, (12), 4 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 6 states have call successors, (10) [2021-11-12 22:20:58,259 WARN L227 SmtUtils]: Spent 6.39s on a formula simplification that was a NOOP. DAG size: 42 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:21:08,572 WARN L227 SmtUtils]: Spent 10.11s on a formula simplification that was a NOOP. DAG size: 41 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:21:19,624 WARN L227 SmtUtils]: Spent 10.18s on a formula simplification. DAG size of input: 48 DAG size of output: 39 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:21:30,205 WARN L227 SmtUtils]: Spent 10.41s on a formula simplification that was a NOOP. DAG size: 51 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:21:43,006 WARN L227 SmtUtils]: Spent 12.37s on a formula simplification. DAG size of input: 38 DAG size of output: 29 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:21:45,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:21:45,587 INFO L93 Difference]: Finished difference Result 94 states and 108 transitions. [2021-11-12 22:21:45,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-12 22:21:45,588 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 23 states have internal predecessors, (57), 8 states have call successors, (12), 4 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 6 states have call successors, (10) Word has length 42 [2021-11-12 22:21:45,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:21:45,589 INFO L225 Difference]: With dead ends: 94 [2021-11-12 22:21:45,589 INFO L226 Difference]: Without dead ends: 88 [2021-11-12 22:21:45,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 207 SyntacticMatches, 11 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 63.3s TimeCoverageRelationStatistics Valid=166, Invalid=1811, Unknown=3, NotChecked=0, Total=1980 [2021-11-12 22:21:45,592 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 50 mSDsluCounter, 745 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1286.20ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 791 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.90ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 1439.84ms IncrementalHoareTripleChecker+Time [2021-11-12 22:21:45,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 791 Invalid, 431 Unknown, 0 Unchecked, 7.90ms Time], IncrementalHoareTripleChecker [18 Valid, 306 Invalid, 0 Unknown, 107 Unchecked, 1439.84ms Time] [2021-11-12 22:21:45,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-11-12 22:21:45,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 80. [2021-11-12 22:21:45,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 56 states have (on average 1.1428571428571428) internal successors, (64), 58 states have internal predecessors, (64), 13 states have call successors, (13), 9 states have call predecessors, (13), 10 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2021-11-12 22:21:45,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 91 transitions. [2021-11-12 22:21:45,603 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 91 transitions. Word has length 42 [2021-11-12 22:21:45,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:21:45,604 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 91 transitions. [2021-11-12 22:21:45,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 23 states have internal predecessors, (57), 8 states have call successors, (12), 4 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 6 states have call successors, (10) [2021-11-12 22:21:45,604 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 91 transitions. [2021-11-12 22:21:45,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-12 22:21:45,606 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:21:45,606 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:21:45,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-12 22:21:45,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 22:21:46,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-12 22:21:46,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:21:46,209 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:21:46,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:21:46,210 INFO L85 PathProgramCache]: Analyzing trace with hash -114260447, now seen corresponding path program 1 times [2021-11-12 22:21:46,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:21:46,210 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [26543442] [2021-11-12 22:21:46,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:21:46,211 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:21:46,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:21:46,212 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:21:46,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 22:21:46,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:21:46,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-12 22:21:46,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:21:46,751 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 34 treesize of output 26 [2021-11-12 22:21:48,161 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:21:48,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:21:49,567 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-11-12 22:21:49,568 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 13 [2021-11-12 22:21:52,246 INFO L354 Elim1Store]: treesize reduction 31, result has 73.0 percent of original size [2021-11-12 22:21:52,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 100 [2021-11-12 22:21:52,260 INFO L354 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2021-11-12 22:21:52,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 84 treesize of output 54 [2021-11-12 22:21:52,441 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:21:52,441 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:21:52,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [26543442] [2021-11-12 22:21:52,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [26543442] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:21:52,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [866566270] [2021-11-12 22:21:52,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:21:52,441 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:21:52,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:21:52,442 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:21:52,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-12 22:21:52,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:21:52,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-12 22:21:52,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:21:52,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2021-11-12 22:21:53,798 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:21:53,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:21:54,550 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-11-12 22:21:54,551 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 13 [2021-11-12 22:21:58,999 INFO L354 Elim1Store]: treesize reduction 27, result has 76.5 percent of original size [2021-11-12 22:21:58,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 104 [2021-11-12 22:21:59,035 INFO L354 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-11-12 22:21:59,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 65 [2021-11-12 22:21:59,218 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:21:59,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [866566270] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:21:59,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89359007] [2021-11-12 22:21:59,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:21:59,218 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:21:59,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:21:59,225 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:21:59,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-12 22:21:59,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:21:59,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-12 22:21:59,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:21:59,600 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 34 treesize of output 26 [2021-11-12 22:22:00,467 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:22:00,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:22:01,509 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-11-12 22:22:01,509 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 13 [2021-11-12 22:22:05,972 INFO L354 Elim1Store]: treesize reduction 27, result has 76.5 percent of original size [2021-11-12 22:22:05,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 104 [2021-11-12 22:22:06,005 INFO L354 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-11-12 22:22:06,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 65 [2021-11-12 22:22:06,126 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:22:06,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89359007] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:22:06,126 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:22:06,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 17, 15, 16, 15] total 30 [2021-11-12 22:22:06,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777055782] [2021-11-12 22:22:06,127 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:22:06,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-12 22:22:06,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:22:06,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-12 22:22:06,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=774, Unknown=0, NotChecked=0, Total=870 [2021-11-12 22:22:06,129 INFO L87 Difference]: Start difference. First operand 80 states and 91 transitions. Second operand has 30 states, 25 states have (on average 2.36) internal successors, (59), 26 states have internal predecessors, (59), 8 states have call successors, (12), 3 states have call predecessors, (12), 8 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2021-11-12 22:22:08,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:22:08,064 INFO L93 Difference]: Finished difference Result 128 states and 149 transitions. [2021-11-12 22:22:08,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-12 22:22:08,066 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 25 states have (on average 2.36) internal successors, (59), 26 states have internal predecessors, (59), 8 states have call successors, (12), 3 states have call predecessors, (12), 8 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) Word has length 42 [2021-11-12 22:22:08,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:22:08,067 INFO L225 Difference]: With dead ends: 128 [2021-11-12 22:22:08,067 INFO L226 Difference]: Without dead ends: 88 [2021-11-12 22:22:08,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 204 SyntacticMatches, 16 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=193, Invalid=1529, Unknown=0, NotChecked=0, Total=1722 [2021-11-12 22:22:08,069 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 35 mSDsluCounter, 689 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 436.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 738 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.02ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 149 IncrementalHoareTripleChecker+Unchecked, 495.10ms IncrementalHoareTripleChecker+Time [2021-11-12 22:22:08,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 738 Invalid, 293 Unknown, 0 Unchecked, 4.02ms Time], IncrementalHoareTripleChecker [15 Valid, 129 Invalid, 0 Unknown, 149 Unchecked, 495.10ms Time] [2021-11-12 22:22:08,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-11-12 22:22:08,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 82. [2021-11-12 22:22:08,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 58 states have (on average 1.1379310344827587) internal successors, (66), 60 states have internal predecessors, (66), 13 states have call successors, (13), 9 states have call predecessors, (13), 10 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2021-11-12 22:22:08,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 93 transitions. [2021-11-12 22:22:08,081 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 93 transitions. Word has length 42 [2021-11-12 22:22:08,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:22:08,081 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 93 transitions. [2021-11-12 22:22:08,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 25 states have (on average 2.36) internal successors, (59), 26 states have internal predecessors, (59), 8 states have call successors, (12), 3 states have call predecessors, (12), 8 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2021-11-12 22:22:08,082 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 93 transitions. [2021-11-12 22:22:08,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-12 22:22:08,083 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:22:08,083 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:22:08,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 22:22:08,321 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-12 22:22:08,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-11-12 22:22:08,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:22:08,699 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:22:08,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:22:08,700 INFO L85 PathProgramCache]: Analyzing trace with hash -507287457, now seen corresponding path program 1 times [2021-11-12 22:22:08,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:22:08,700 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1172278283] [2021-11-12 22:22:08,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:22:08,701 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:22:08,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:22:08,701 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:22:08,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 22:22:08,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:22:08,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-12 22:22:08,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:22:09,433 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 [2021-11-12 22:22:09,441 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 [2021-11-12 22:22:09,661 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:22:09,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:22:12,476 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:22:12,476 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 40 treesize of output 43 [2021-11-12 22:22:12,499 INFO L354 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-11-12 22:22:12,500 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 39 treesize of output 34 [2021-11-12 22:22:12,520 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:22:12,520 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:22:12,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1172278283] [2021-11-12 22:22:12,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1172278283] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:22:12,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [351678494] [2021-11-12 22:22:12,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:22:12,521 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:22:12,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:22:12,522 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:22:12,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-12 22:22:12,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:22:12,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-12 22:22:12,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:22:13,131 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 [2021-11-12 22:22:13,133 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 [2021-11-12 22:22:13,241 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:22:13,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:22:15,760 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:22:15,761 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 40 treesize of output 43 [2021-11-12 22:22:15,782 INFO L354 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-11-12 22:22:15,782 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 39 treesize of output 34 [2021-11-12 22:22:15,804 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:22:15,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [351678494] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:22:15,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181271116] [2021-11-12 22:22:15,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:22:15,805 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:22:15,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:22:15,806 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:22:15,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-12 22:22:15,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:22:15,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-12 22:22:15,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:22:16,258 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 [2021-11-12 22:22:16,260 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 [2021-11-12 22:22:16,356 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:22:16,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:22:18,874 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:22:18,874 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 40 treesize of output 43 [2021-11-12 22:22:18,894 INFO L354 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-11-12 22:22:18,895 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 39 treesize of output 34 [2021-11-12 22:22:18,915 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:22:18,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181271116] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:22:18,915 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:22:18,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 12, 10, 12, 10] total 16 [2021-11-12 22:22:18,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581461849] [2021-11-12 22:22:18,916 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:22:18,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-12 22:22:18,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:22:18,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-12 22:22:18,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-11-12 22:22:18,918 INFO L87 Difference]: Start difference. First operand 82 states and 93 transitions. Second operand has 16 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 6 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-12 22:22:20,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:22:20,425 INFO L93 Difference]: Finished difference Result 135 states and 154 transitions. [2021-11-12 22:22:20,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-12 22:22:20,426 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 6 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) Word has length 42 [2021-11-12 22:22:20,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:22:20,427 INFO L225 Difference]: With dead ends: 135 [2021-11-12 22:22:20,428 INFO L226 Difference]: Without dead ends: 85 [2021-11-12 22:22:20,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 230 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-11-12 22:22:20,431 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 65 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 612.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.09ms SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 705.25ms IncrementalHoareTripleChecker+Time [2021-11-12 22:22:20,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 325 Invalid, 321 Unknown, 0 Unchecked, 3.09ms Time], IncrementalHoareTripleChecker [49 Valid, 234 Invalid, 0 Unknown, 38 Unchecked, 705.25ms Time] [2021-11-12 22:22:20,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-11-12 22:22:20,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 76. [2021-11-12 22:22:20,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 54 states have (on average 1.1111111111111112) internal successors, (60), 55 states have internal predecessors, (60), 12 states have call successors, (12), 9 states have call predecessors, (12), 9 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2021-11-12 22:22:20,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 84 transitions. [2021-11-12 22:22:20,442 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 84 transitions. Word has length 42 [2021-11-12 22:22:20,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:22:20,442 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 84 transitions. [2021-11-12 22:22:20,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 6 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-12 22:22:20,443 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 84 transitions. [2021-11-12 22:22:20,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-12 22:22:20,445 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:22:20,445 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:22:20,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-12 22:22:20,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-12 22:22:20,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-12 22:22:21,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:22:21,053 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:22:21,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:22:21,054 INFO L85 PathProgramCache]: Analyzing trace with hash 709260864, now seen corresponding path program 1 times [2021-11-12 22:22:21,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:22:21,055 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1599291135] [2021-11-12 22:22:21,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:22:21,055 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:22:21,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:22:21,056 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:22:21,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-12 22:22:21,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:22:21,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:22:21,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:22:21,349 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 37 treesize of output 25 [2021-11-12 22:22:21,352 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 22 treesize of output 10 [2021-11-12 22:22:21,400 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 22:22:21,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:22:21,570 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 22:22:21,570 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:22:21,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1599291135] [2021-11-12 22:22:21,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1599291135] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:22:21,570 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:22:21,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-11-12 22:22:21,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137112783] [2021-11-12 22:22:21,570 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:22:21,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:22:21,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:22:21,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:22:21,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:22:21,572 INFO L87 Difference]: Start difference. First operand 76 states and 84 transitions. Second operand has 8 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-12 22:22:21,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:22:21,856 INFO L93 Difference]: Finished difference Result 82 states and 89 transitions. [2021-11-12 22:22:21,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:22:21,857 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 48 [2021-11-12 22:22:21,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:22:21,858 INFO L225 Difference]: With dead ends: 82 [2021-11-12 22:22:21,858 INFO L226 Difference]: Without dead ends: 80 [2021-11-12 22:22:21,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:22:21,859 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 10 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 190.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.54ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 230.96ms IncrementalHoareTripleChecker+Time [2021-11-12 22:22:21,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 314 Invalid, 69 Unknown, 0 Unchecked, 1.54ms Time], IncrementalHoareTripleChecker [4 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 230.96ms Time] [2021-11-12 22:22:21,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-12 22:22:21,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-11-12 22:22:21,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 57 states have (on average 1.105263157894737) internal successors, (63), 58 states have internal predecessors, (63), 12 states have call successors, (12), 10 states have call predecessors, (12), 10 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2021-11-12 22:22:21,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 87 transitions. [2021-11-12 22:22:21,869 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 87 transitions. Word has length 48 [2021-11-12 22:22:21,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:22:21,870 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 87 transitions. [2021-11-12 22:22:21,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-12 22:22:21,870 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 87 transitions. [2021-11-12 22:22:21,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-12 22:22:21,872 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:22:21,872 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:22:21,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-12 22:22:22,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:22:22,085 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:22:22,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:22:22,085 INFO L85 PathProgramCache]: Analyzing trace with hash -593356994, now seen corresponding path program 1 times [2021-11-12 22:22:22,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:22:22,086 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1591599753] [2021-11-12 22:22:22,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:22:22,086 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:22:22,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:22:22,087 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:22:22,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-12 22:22:22,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:22:22,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-12 22:22:22,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:22:25,340 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 14 proven. 12 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-12 22:22:25,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:22:39,145 WARN L227 SmtUtils]: Spent 10.09s on a formula simplification that was a NOOP. DAG size: 24 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:22:49,621 WARN L227 SmtUtils]: Spent 10.11s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:22:54,464 INFO L354 Elim1Store]: treesize reduction 23, result has 80.0 percent of original size [2021-11-12 22:22:54,465 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 80 treesize of output 135 [2021-11-12 22:22:54,771 INFO L354 Elim1Store]: treesize reduction 12, result has 84.8 percent of original size [2021-11-12 22:22:54,771 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 123 treesize of output 147 [2021-11-12 22:23:02,142 INFO L354 Elim1Store]: treesize reduction 23, result has 80.0 percent of original size [2021-11-12 22:23:02,142 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 80 treesize of output 135 [2021-11-12 22:23:02,475 INFO L354 Elim1Store]: treesize reduction 12, result has 84.8 percent of original size [2021-11-12 22:23:02,475 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 123 treesize of output 147 [2021-11-12 22:23:03,862 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:23:03,863 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:23:03,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1591599753] [2021-11-12 22:23:03,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1591599753] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:23:03,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1436088766] [2021-11-12 22:23:03,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:23:03,864 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:23:03,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:23:03,865 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:23:03,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-12 22:23:04,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:23:04,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-12 22:23:04,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:23:07,135 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 14 proven. 12 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-12 22:23:07,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:23:15,148 INFO L354 Elim1Store]: treesize reduction 23, result has 80.0 percent of original size [2021-11-12 22:23:15,148 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 80 treesize of output 135 [2021-11-12 22:23:15,462 INFO L354 Elim1Store]: treesize reduction 12, result has 84.8 percent of original size [2021-11-12 22:23:15,463 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 123 treesize of output 147 [2021-11-12 22:23:21,883 INFO L354 Elim1Store]: treesize reduction 23, result has 80.0 percent of original size [2021-11-12 22:23:21,884 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 80 treesize of output 135 [2021-11-12 22:23:22,210 INFO L354 Elim1Store]: treesize reduction 12, result has 84.8 percent of original size [2021-11-12 22:23:22,210 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 123 treesize of output 147 [2021-11-12 22:23:24,919 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:23:24,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1436088766] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:23:24,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764880196] [2021-11-12 22:23:24,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:23:24,920 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:23:24,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:23:24,922 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:23:24,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-12 22:23:25,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:23:25,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-12 22:23:25,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:23:28,858 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 22:23:28,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:23:42,130 WARN L227 SmtUtils]: Spent 10.10s on a formula simplification that was a NOOP. DAG size: 24 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:23:52,577 WARN L227 SmtUtils]: Spent 10.12s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:24:00,351 INFO L354 Elim1Store]: treesize reduction 23, result has 80.0 percent of original size [2021-11-12 22:24:00,352 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 80 treesize of output 135 [2021-11-12 22:24:00,669 INFO L354 Elim1Store]: treesize reduction 12, result has 84.8 percent of original size [2021-11-12 22:24:00,669 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 123 treesize of output 147 [2021-11-12 22:24:08,188 INFO L354 Elim1Store]: treesize reduction 23, result has 80.0 percent of original size [2021-11-12 22:24:08,189 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 80 treesize of output 135 [2021-11-12 22:24:08,514 INFO L354 Elim1Store]: treesize reduction 12, result has 84.8 percent of original size [2021-11-12 22:24:08,514 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 123 treesize of output 147 [2021-11-12 22:24:10,050 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 17 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 22:24:10,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764880196] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:24:10,050 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:24:10,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 19, 16, 23, 20] total 42 [2021-11-12 22:24:10,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108820194] [2021-11-12 22:24:10,051 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:24:10,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-12 22:24:10,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:24:10,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-12 22:24:10,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1559, Unknown=2, NotChecked=0, Total=1722 [2021-11-12 22:24:10,055 INFO L87 Difference]: Start difference. First operand 80 states and 87 transitions. Second operand has 42 states, 33 states have (on average 2.757575757575758) internal successors, (91), 34 states have internal predecessors, (91), 14 states have call successors, (32), 4 states have call predecessors, (32), 10 states have return successors, (31), 11 states have call predecessors, (31), 12 states have call successors, (31) [2021-11-12 22:24:35,646 WARN L227 SmtUtils]: Spent 20.24s on a formula simplification. DAG size of input: 29 DAG size of output: 28 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:24:35,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:24:35,663 INFO L93 Difference]: Finished difference Result 91 states and 98 transitions. [2021-11-12 22:24:35,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-12 22:24:35,664 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 33 states have (on average 2.757575757575758) internal successors, (91), 34 states have internal predecessors, (91), 14 states have call successors, (32), 4 states have call predecessors, (32), 10 states have return successors, (31), 11 states have call predecessors, (31), 12 states have call successors, (31) Word has length 63 [2021-11-12 22:24:35,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:24:35,665 INFO L225 Difference]: With dead ends: 91 [2021-11-12 22:24:35,665 INFO L226 Difference]: Without dead ends: 89 [2021-11-12 22:24:35,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 298 SyntacticMatches, 37 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1138 ImplicationChecksByTransitivity, 82.6s TimeCoverageRelationStatistics Valid=286, Invalid=2681, Unknown=3, NotChecked=0, Total=2970 [2021-11-12 22:24:35,667 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 33 mSDsluCounter, 658 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 857.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 694 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.34ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 218 IncrementalHoareTripleChecker+Unchecked, 981.65ms IncrementalHoareTripleChecker+Time [2021-11-12 22:24:35,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 694 Invalid, 484 Unknown, 0 Unchecked, 4.34ms Time], IncrementalHoareTripleChecker [18 Valid, 248 Invalid, 0 Unknown, 218 Unchecked, 981.65ms Time] [2021-11-12 22:24:35,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-11-12 22:24:35,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 84. [2021-11-12 22:24:35,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 59 states have (on average 1.0847457627118644) internal successors, (64), 60 states have internal predecessors, (64), 13 states have call successors, (13), 11 states have call predecessors, (13), 11 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2021-11-12 22:24:35,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 90 transitions. [2021-11-12 22:24:35,678 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 90 transitions. Word has length 63 [2021-11-12 22:24:35,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:24:35,678 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 90 transitions. [2021-11-12 22:24:35,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 33 states have (on average 2.757575757575758) internal successors, (91), 34 states have internal predecessors, (91), 14 states have call successors, (32), 4 states have call predecessors, (32), 10 states have return successors, (31), 11 states have call predecessors, (31), 12 states have call successors, (31) [2021-11-12 22:24:35,679 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 90 transitions. [2021-11-12 22:24:35,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-12 22:24:35,680 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:24:35,681 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-12 22:24:35,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-12 22:24:35,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-12 22:24:36,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-12 22:24:36,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:24:36,289 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:24:36,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:24:36,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1402703620, now seen corresponding path program 1 times [2021-11-12 22:24:36,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:24:36,290 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1082545436] [2021-11-12 22:24:36,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:24:36,290 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:24:36,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:24:36,291 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:24:36,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-12 22:24:36,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:24:36,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-12 22:24:36,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:24:39,554 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 17 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-12 22:24:39,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:24:42,748 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:24:42,749 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 40 treesize of output 43 [2021-11-12 22:24:42,769 INFO L354 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-11-12 22:24:42,769 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 39 treesize of output 34 [2021-11-12 22:24:45,206 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:24:45,207 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 40 treesize of output 43 [2021-11-12 22:24:45,227 INFO L354 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-11-12 22:24:45,228 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 39 treesize of output 34 [2021-11-12 22:24:45,250 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:24:45,251 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:24:45,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1082545436] [2021-11-12 22:24:45,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1082545436] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:24:45,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [494657257] [2021-11-12 22:24:45,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:24:45,251 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:24:45,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:24:45,256 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:24:45,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-12 22:24:45,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:24:45,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-12 22:24:45,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:24:47,100 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 23 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-12 22:24:47,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:24:49,811 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:24:49,811 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 40 treesize of output 43 [2021-11-12 22:24:49,831 INFO L354 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-11-12 22:24:49,832 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 39 treesize of output 34 [2021-11-12 22:24:52,044 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:24:52,044 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 40 treesize of output 43 [2021-11-12 22:24:52,065 INFO L354 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-11-12 22:24:52,065 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 39 treesize of output 34 [2021-11-12 22:24:52,168 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:24:52,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [494657257] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:24:52,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484839934] [2021-11-12 22:24:52,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:24:52,169 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:24:52,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:24:52,170 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:24:52,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-12 22:24:52,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:24:52,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-12 22:24:52,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:24:53,620 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 22:24:53,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:24:56,999 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:24:57,000 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 40 treesize of output 43 [2021-11-12 22:24:57,021 INFO L354 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-11-12 22:24:57,021 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 39 treesize of output 34 [2021-11-12 22:24:57,073 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 22:24:57,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484839934] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:24:57,074 INFO L186 FreeRefinementEngine]: Found 2 perfect and 4 imperfect interpolant sequences. [2021-11-12 22:24:57,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12, 11] imperfect sequences [13, 12, 13, 12] total 27 [2021-11-12 22:24:57,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437139217] [2021-11-12 22:24:57,074 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:24:57,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-12 22:24:57,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:24:57,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-12 22:24:57,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2021-11-12 22:24:57,075 INFO L87 Difference]: Start difference. First operand 84 states and 90 transitions. Second operand has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 states have internal predecessors, (55), 7 states have call successors, (17), 3 states have call predecessors, (17), 6 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) [2021-11-12 22:24:58,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:24:58,787 INFO L93 Difference]: Finished difference Result 116 states and 127 transitions. [2021-11-12 22:24:58,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-12 22:24:58,788 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 states have internal predecessors, (55), 7 states have call successors, (17), 3 states have call predecessors, (17), 6 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) Word has length 63 [2021-11-12 22:24:58,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:24:58,790 INFO L225 Difference]: With dead ends: 116 [2021-11-12 22:24:58,790 INFO L226 Difference]: Without dead ends: 94 [2021-11-12 22:24:58,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 322 SyntacticMatches, 26 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=147, Invalid=975, Unknown=0, NotChecked=0, Total=1122 [2021-11-12 22:24:58,791 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 50 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 592.81ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.53ms SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 133 IncrementalHoareTripleChecker+Unchecked, 690.90ms IncrementalHoareTripleChecker+Time [2021-11-12 22:24:58,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 349 Invalid, 354 Unknown, 0 Unchecked, 2.53ms Time], IncrementalHoareTripleChecker [33 Valid, 188 Invalid, 0 Unknown, 133 Unchecked, 690.90ms Time] [2021-11-12 22:24:58,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-11-12 22:24:58,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 86. [2021-11-12 22:24:58,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 61 states have (on average 1.0819672131147542) internal successors, (66), 62 states have internal predecessors, (66), 13 states have call successors, (13), 11 states have call predecessors, (13), 11 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2021-11-12 22:24:58,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 92 transitions. [2021-11-12 22:24:58,803 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 92 transitions. Word has length 63 [2021-11-12 22:24:58,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:24:58,804 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 92 transitions. [2021-11-12 22:24:58,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 states have internal predecessors, (55), 7 states have call successors, (17), 3 states have call predecessors, (17), 6 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) [2021-11-12 22:24:58,804 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 92 transitions. [2021-11-12 22:24:58,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-12 22:24:58,805 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:24:58,806 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 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] [2021-11-12 22:24:58,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-12 22:24:59,039 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (22)] Ended with exit code 0 [2021-11-12 22:24:59,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-12 22:24:59,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:24:59,434 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:24:59,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:24:59,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1795730630, now seen corresponding path program 1 times [2021-11-12 22:24:59,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:24:59,435 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [408092912] [2021-11-12 22:24:59,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:24:59,435 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:24:59,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:24:59,436 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:24:59,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-12 22:24:59,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:24:59,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 22:24:59,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:24:59,733 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 22:24:59,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:24:59,923 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 22:24:59,923 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:24:59,924 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [408092912] [2021-11-12 22:24:59,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [408092912] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:24:59,924 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:24:59,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-12 22:24:59,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706000832] [2021-11-12 22:24:59,924 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:24:59,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:24:59,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:24:59,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:24:59,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:24:59,925 INFO L87 Difference]: Start difference. First operand 86 states and 92 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-12 22:24:59,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:24:59,957 INFO L93 Difference]: Finished difference Result 110 states and 119 transitions. [2021-11-12 22:24:59,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:24:59,958 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 63 [2021-11-12 22:24:59,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:24:59,959 INFO L225 Difference]: With dead ends: 110 [2021-11-12 22:24:59,959 INFO L226 Difference]: Without dead ends: 80 [2021-11-12 22:24:59,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:24:59,960 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 9 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.44ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.48ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.92ms IncrementalHoareTripleChecker+Time [2021-11-12 22:24:59,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 144 Invalid, 11 Unknown, 0 Unchecked, 0.48ms Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 24.92ms Time] [2021-11-12 22:24:59,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-12 22:24:59,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-11-12 22:24:59,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 57 states have internal predecessors, (60), 12 states have call successors, (12), 11 states have call predecessors, (12), 10 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-12 22:24:59,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 83 transitions. [2021-11-12 22:24:59,970 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 83 transitions. Word has length 63 [2021-11-12 22:24:59,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:24:59,970 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 83 transitions. [2021-11-12 22:24:59,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-12 22:24:59,971 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 83 transitions. [2021-11-12 22:24:59,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-12 22:24:59,972 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:24:59,973 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 3, 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] [2021-11-12 22:24:59,987 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-12 22:25:00,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:25:00,185 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:25:00,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:25:00,185 INFO L85 PathProgramCache]: Analyzing trace with hash 180273006, now seen corresponding path program 1 times [2021-11-12 22:25:00,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:25:00,186 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1378388139] [2021-11-12 22:25:00,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:25:00,186 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:25:00,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:25:00,187 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:25:00,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-12 22:25:00,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:25:00,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-12 22:25:00,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:25:04,224 INFO L354 Elim1Store]: treesize reduction 85, result has 43.0 percent of original size [2021-11-12 22:25:04,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 221 treesize of output 174 [2021-11-12 22:25:04,417 INFO L354 Elim1Store]: treesize reduction 59, result has 47.8 percent of original size [2021-11-12 22:25:04,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 135 treesize of output 131 [2021-11-12 22:25:04,576 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 20 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-12 22:25:04,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:25:10,422 INFO L354 Elim1Store]: treesize reduction 49, result has 2.0 percent of original size [2021-11-12 22:25:10,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 3 case distinctions, treesize of input 136 treesize of output 1 [2021-11-12 22:25:24,217 WARN L227 SmtUtils]: Spent 8.88s on a formula simplification. DAG size of input: 72 DAG size of output: 65 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-12 22:25:24,218 INFO L354 Elim1Store]: treesize reduction 27, result has 84.6 percent of original size [2021-11-12 22:25:24,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 136 treesize of output 223 [2021-11-12 22:25:25,148 INFO L354 Elim1Store]: treesize reduction 29, result has 77.2 percent of original size [2021-11-12 22:25:25,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 239 treesize of output 236 [2021-11-12 22:26:10,276 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 14 proven. 12 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-12 22:26:10,276 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:26:10,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1378388139] [2021-11-12 22:26:10,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1378388139] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:26:10,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1536031570] [2021-11-12 22:26:10,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:26:10,277 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:26:10,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:26:10,282 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:26:10,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-12 22:26:10,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:26:10,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-12 22:26:10,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:27:14,679 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 22:27:14,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:27:30,191 WARN L227 SmtUtils]: Spent 11.50s on a formula simplification that was a NOOP. DAG size: 24 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:27:55,319 WARN L227 SmtUtils]: Spent 12.89s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:27:59,373 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-12 22:27:59,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1536031570] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:27:59,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102207723] [2021-11-12 22:27:59,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:27:59,374 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:27:59,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:27:59,375 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:27:59,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-12 22:27:59,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:27:59,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-12 22:27:59,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:28:01,501 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [|ULTIMATE.start_aws_linked_list_prev_~node#1.base|] [2021-11-12 22:28:01,502 INFO L186 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2021-11-12 22:28:01,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 20, 17] total 54 [2021-11-12 22:28:01,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952824048] [2021-11-12 22:28:01,502 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2021-11-12 22:28:01,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-11-12 22:28:01,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:28:01,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-11-12 22:28:01,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=2755, Unknown=13, NotChecked=0, Total=2970 [2021-11-12 22:28:01,506 INFO L87 Difference]: Start difference. First operand 80 states and 83 transitions. Second operand has 54 states, 47 states have (on average 2.5531914893617023) internal successors, (120), 44 states have internal predecessors, (120), 14 states have call successors, (35), 5 states have call predecessors, (35), 14 states have return successors, (34), 16 states have call predecessors, (34), 12 states have call successors, (34) [2021-11-12 22:28:11,687 WARN L227 SmtUtils]: Spent 6.55s on a formula simplification that was a NOOP. DAG size: 42 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:28:22,649 WARN L227 SmtUtils]: Spent 10.35s on a formula simplification that was a NOOP. DAG size: 41 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:28:36,579 WARN L227 SmtUtils]: Spent 10.64s on a formula simplification that was a NOOP. DAG size: 48 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:28:47,693 WARN L227 SmtUtils]: Spent 10.53s on a formula simplification that was a NOOP. DAG size: 51 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:28:50,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:28:50,634 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2021-11-12 22:28:50,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-12 22:28:50,635 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 47 states have (on average 2.5531914893617023) internal successors, (120), 44 states have internal predecessors, (120), 14 states have call successors, (35), 5 states have call predecessors, (35), 14 states have return successors, (34), 16 states have call predecessors, (34), 12 states have call successors, (34) Word has length 77 [2021-11-12 22:28:50,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:28:50,636 INFO L225 Difference]: With dead ends: 93 [2021-11-12 22:28:50,636 INFO L226 Difference]: Without dead ends: 91 [2021-11-12 22:28:50,638 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 261 SyntacticMatches, 15 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1407 ImplicationChecksByTransitivity, 163.9s TimeCoverageRelationStatistics Valid=310, Invalid=4507, Unknown=13, NotChecked=0, Total=4830 [2021-11-12 22:28:50,639 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 39 mSDsluCounter, 724 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2349.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 759 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.78ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 326 IncrementalHoareTripleChecker+Unchecked, 2527.54ms IncrementalHoareTripleChecker+Time [2021-11-12 22:28:50,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 759 Invalid, 611 Unknown, 0 Unchecked, 4.78ms Time], IncrementalHoareTripleChecker [15 Valid, 270 Invalid, 0 Unknown, 326 Unchecked, 2527.54ms Time] [2021-11-12 22:28:50,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-11-12 22:28:50,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2021-11-12 22:28:50,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 65 states have internal predecessors, (66), 13 states have call successors, (13), 12 states have call predecessors, (13), 13 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2021-11-12 22:28:50,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2021-11-12 22:28:50,650 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 77 [2021-11-12 22:28:50,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:28:50,651 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2021-11-12 22:28:50,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 47 states have (on average 2.5531914893617023) internal successors, (120), 44 states have internal predecessors, (120), 14 states have call successors, (35), 5 states have call predecessors, (35), 14 states have return successors, (34), 16 states have call predecessors, (34), 12 states have call successors, (34) [2021-11-12 22:28:50,651 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2021-11-12 22:28:50,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-12 22:28:50,653 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:28:50,653 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:28:50,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-12 22:28:50,864 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (26)] Ended with exit code 0 [2021-11-12 22:28:51,075 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2021-11-12 22:28:51,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:28:51,261 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:28:51,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:28:51,262 INFO L85 PathProgramCache]: Analyzing trace with hash -629073620, now seen corresponding path program 1 times [2021-11-12 22:28:51,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:28:51,262 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [679092683] [2021-11-12 22:28:51,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:28:51,262 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:28:51,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:28:51,263 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:28:51,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-12 22:28:51,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:28:51,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-12 22:28:51,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:28:52,870 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 34 treesize of output 26 [2021-11-12 22:29:03,585 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-12 22:29:03,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:10,924 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-11-12 22:29:10,924 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 13 [2021-11-12 22:29:17,105 INFO L354 Elim1Store]: treesize reduction 27, result has 76.5 percent of original size [2021-11-12 22:29:17,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 104 [2021-11-12 22:29:17,238 INFO L354 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-11-12 22:29:17,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 65 [2021-11-12 22:29:17,931 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 14 proven. 12 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-12 22:29:17,931 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:29:17,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [679092683] [2021-11-12 22:29:17,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [679092683] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:29:17,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1908078424] [2021-11-12 22:29:17,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:29:17,932 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:29:17,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:29:17,933 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:29:17,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-12 22:29:18,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:29:18,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-12 22:29:18,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:30:14,244 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 38 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 22:30:14,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:30:30,656 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-12 22:30:30,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1908078424] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:30:30,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674615902] [2021-11-12 22:30:30,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:30:30,657 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:30:30,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:30:30,658 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:30:30,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b30406b6-616f-47ba-8428-2160be9b880a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-12 22:30:30,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:30:30,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-12 22:30:30,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:31:10,832 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 38 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 22:31:10,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:31:13,287 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-12 22:31:13,288 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 [2021-11-12 22:31:13,318 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-11-12 22:31:13,318 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 [2021-11-12 22:31:13,405 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-12 22:31:13,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674615902] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:31:13,406 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:31:13,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 15, 13, 14, 13] total 61 [2021-11-12 22:31:13,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884033172] [2021-11-12 22:31:13,406 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:31:13,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-11-12 22:31:13,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:31:13,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-11-12 22:31:13,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=3361, Unknown=24, NotChecked=0, Total=3660 [2021-11-12 22:31:13,410 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand has 61 states, 57 states have (on average 2.473684210526316) internal successors, (141), 57 states have internal predecessors, (141), 15 states have call successors, (44), 5 states have call predecessors, (44), 14 states have return successors, (43), 15 states have call predecessors, (43), 14 states have call successors, (43)