./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_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_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/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_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/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_adb04f81-2120-4f57-a6fc-a15bf95aad7e/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 3bef4637cc296c755ba815d09f028f51f0bde7e0d2e6155f2b5c648b5201a193 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 01:29:39,127 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 01:29:39,131 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 01:29:39,192 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 01:29:39,193 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 01:29:39,198 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 01:29:39,200 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 01:29:39,204 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 01:29:39,207 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 01:29:39,214 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 01:29:39,215 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 01:29:39,217 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 01:29:39,218 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 01:29:39,220 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 01:29:39,222 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 01:29:39,228 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 01:29:39,230 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 01:29:39,231 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 01:29:39,233 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 01:29:39,242 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 01:29:39,245 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 01:29:39,246 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 01:29:39,249 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 01:29:39,250 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 01:29:39,254 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 01:29:39,254 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 01:29:39,255 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 01:29:39,256 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 01:29:39,257 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 01:29:39,258 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 01:29:39,259 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 01:29:39,260 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 01:29:39,261 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 01:29:39,263 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 01:29:39,264 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 01:29:39,264 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 01:29:39,265 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 01:29:39,265 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 01:29:39,265 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 01:29:39,266 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 01:29:39,267 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 01:29:39,268 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-13 01:29:39,313 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 01:29:39,313 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 01:29:39,315 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 01:29:39,315 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 01:29:39,315 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 01:29:39,315 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 01:29:39,316 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 01:29:39,316 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-13 01:29:39,322 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 01:29:39,322 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 01:29:39,323 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-13 01:29:39,324 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-13 01:29:39,324 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 01:29:39,324 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-13 01:29:39,324 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-13 01:29:39,325 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-13 01:29:39,325 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 01:29:39,326 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 01:29:39,326 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 01:29:39,326 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 01:29:39,326 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 01:29:39,326 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 01:29:39,327 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 01:29:39,327 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 01:29:39,327 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 01:29:39,327 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 01:29:39,328 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 01:29:39,328 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 01:29:39,328 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 01:29:39,329 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 01:29:39,330 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 01:29:39,330 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 01:29:39,330 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-13 01:29:39,331 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 01:29:39,331 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 01:29:39,331 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 01:29:39,331 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 01:29:39,331 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_adb04f81-2120-4f57-a6fc-a15bf95aad7e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3bef4637cc296c755ba815d09f028f51f0bde7e0d2e6155f2b5c648b5201a193 [2021-11-13 01:29:39,623 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 01:29:39,647 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 01:29:39,650 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 01:29:39,651 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 01:29:39,651 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 01:29:39,653 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness.i [2021-11-13 01:29:39,736 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/data/c3b87a7ec/5d6cc8ebfd6c4208b4d3acbad1f21fb9/FLAG916a28eb7 [2021-11-13 01:29:40,621 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 01:29:40,621 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness.i [2021-11-13 01:29:40,670 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/data/c3b87a7ec/5d6cc8ebfd6c4208b4d3acbad1f21fb9/FLAG916a28eb7 [2021-11-13 01:29:40,747 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/data/c3b87a7ec/5d6cc8ebfd6c4208b4d3acbad1f21fb9 [2021-11-13 01:29:40,750 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 01:29:40,753 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 01:29:40,755 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 01:29:40,756 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 01:29:40,759 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 01:29:40,760 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:29:40" (1/1) ... [2021-11-13 01:29:40,762 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3657c43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:29:40, skipping insertion in model container [2021-11-13 01:29:40,762 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:29:40" (1/1) ... [2021-11-13 01:29:40,769 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 01:29:40,877 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 01:29:41,157 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_adb04f81-2120-4f57-a6fc-a15bf95aad7e/sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness.i[4496,4509] [2021-11-13 01:29:41,163 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_adb04f81-2120-4f57-a6fc-a15bf95aad7e/sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness.i[4556,4569] [2021-11-13 01:29:41,184 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-13 01:29:41,189 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-13 01:29:41,955 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:41,956 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:41,956 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:41,957 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:41,958 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:41,972 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:41,975 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:41,977 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:41,989 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:41,991 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:41,992 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:41,993 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:41,993 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:42,342 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-13 01:29:42,344 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-13 01:29:42,345 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-13 01:29:42,346 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-13 01:29:42,347 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-13 01:29:42,348 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-13 01:29:42,349 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-13 01:29:42,350 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-13 01:29:42,350 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-13 01:29:42,351 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-13 01:29:42,518 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-13 01:29:42,569 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:29:42,590 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) [2021-11-13 01:29:42,591 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6675c3cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:29:42, skipping insertion in model container [2021-11-13 01:29:42,591 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 01:29:42,591 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-13 01:29:42,593 INFO L158 Benchmark]: Toolchain (without parser) took 1839.33ms. Allocated memory is still 148.9MB. Free memory was 108.5MB in the beginning and 91.0MB in the end (delta: 17.5MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2021-11-13 01:29:42,594 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 100.7MB. Free memory was 54.9MB in the beginning and 54.8MB in the end (delta: 84.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 01:29:42,596 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1835.94ms. Allocated memory is still 148.9MB. Free memory was 108.5MB in the beginning and 91.0MB in the end (delta: 17.5MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2021-11-13 01:29:42,598 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 100.7MB. Free memory was 54.9MB in the beginning and 54.8MB in the end (delta: 84.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1835.94ms. Allocated memory is still 148.9MB. Free memory was 108.5MB in the beginning and 91.0MB in the end (delta: 17.5MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 7037]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/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_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/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_adb04f81-2120-4f57-a6fc-a15bf95aad7e/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 3bef4637cc296c755ba815d09f028f51f0bde7e0d2e6155f2b5c648b5201a193 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 01:29:44,851 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 01:29:44,853 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 01:29:44,884 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 01:29:44,885 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 01:29:44,886 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 01:29:44,888 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 01:29:44,890 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 01:29:44,892 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 01:29:44,894 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 01:29:44,895 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 01:29:44,896 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 01:29:44,896 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 01:29:44,898 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 01:29:44,899 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 01:29:44,901 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 01:29:44,902 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 01:29:44,903 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 01:29:44,905 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 01:29:44,907 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 01:29:44,909 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 01:29:44,917 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 01:29:44,919 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 01:29:44,920 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 01:29:44,925 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 01:29:44,930 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 01:29:44,931 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 01:29:44,934 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 01:29:44,940 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 01:29:44,941 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 01:29:44,942 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 01:29:44,943 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 01:29:44,944 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 01:29:44,945 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 01:29:44,946 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 01:29:44,947 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 01:29:44,948 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 01:29:44,948 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 01:29:44,948 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 01:29:44,950 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 01:29:44,951 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 01:29:44,952 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-13 01:29:44,996 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 01:29:44,997 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 01:29:44,998 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 01:29:44,998 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 01:29:44,999 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 01:29:44,999 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 01:29:44,999 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 01:29:44,999 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 01:29:45,000 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 01:29:45,000 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 01:29:45,002 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 01:29:45,002 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 01:29:45,002 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 01:29:45,003 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 01:29:45,003 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 01:29:45,003 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 01:29:45,003 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-13 01:29:45,004 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-13 01:29:45,004 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 01:29:45,004 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 01:29:45,004 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 01:29:45,004 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 01:29:45,005 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 01:29:45,005 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 01:29:45,005 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 01:29:45,005 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 01:29:45,006 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 01:29:45,006 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 01:29:45,006 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-13 01:29:45,006 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-13 01:29:45,007 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 01:29:45,007 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 01:29:45,007 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 01:29:45,007 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_adb04f81-2120-4f57-a6fc-a15bf95aad7e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3bef4637cc296c755ba815d09f028f51f0bde7e0d2e6155f2b5c648b5201a193 [2021-11-13 01:29:45,353 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 01:29:45,373 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 01:29:45,376 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 01:29:45,377 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 01:29:45,378 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 01:29:45,379 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness.i [2021-11-13 01:29:45,448 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/data/d82a8f5d0/bf1602bdd3784cb5a34a351d3e6e3f05/FLAG0f7769d4f [2021-11-13 01:29:46,271 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 01:29:46,272 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness.i [2021-11-13 01:29:46,329 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/data/d82a8f5d0/bf1602bdd3784cb5a34a351d3e6e3f05/FLAG0f7769d4f [2021-11-13 01:29:46,784 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/data/d82a8f5d0/bf1602bdd3784cb5a34a351d3e6e3f05 [2021-11-13 01:29:46,801 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 01:29:46,803 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 01:29:46,805 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 01:29:46,805 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 01:29:46,809 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 01:29:46,810 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:29:46" (1/1) ... [2021-11-13 01:29:46,812 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b4bc548 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:29:46, skipping insertion in model container [2021-11-13 01:29:46,812 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:29:46" (1/1) ... [2021-11-13 01:29:46,819 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 01:29:46,929 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 01:29:47,206 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_adb04f81-2120-4f57-a6fc-a15bf95aad7e/sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness.i[4496,4509] [2021-11-13 01:29:47,214 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_adb04f81-2120-4f57-a6fc-a15bf95aad7e/sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness.i[4556,4569] [2021-11-13 01:29:47,241 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-13 01:29:47,247 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-13 01:29:47,991 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:47,992 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:47,993 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:47,996 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:47,998 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:48,028 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:48,029 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:48,030 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:48,031 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:48,033 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:48,034 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:48,035 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:48,035 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:48,395 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-13 01:29:48,396 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-13 01:29:48,397 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-13 01:29:48,398 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-13 01:29:48,400 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-13 01:29:48,400 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-13 01:29:48,401 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-13 01:29:48,402 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-13 01:29:48,402 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-13 01:29:48,403 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-13 01:29:48,577 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-13 01:29:48,622 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:29:48,648 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-13 01:29:48,683 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 01:29:48,688 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_adb04f81-2120-4f57-a6fc-a15bf95aad7e/sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness.i[4496,4509] [2021-11-13 01:29:48,691 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_adb04f81-2120-4f57-a6fc-a15bf95aad7e/sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness.i[4556,4569] [2021-11-13 01:29:48,692 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-13 01:29:48,692 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-13 01:29:48,734 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:48,735 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:48,735 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:48,736 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:48,737 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:48,744 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:48,744 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:48,745 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:48,746 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:48,747 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:48,747 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:48,748 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:48,748 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:48,784 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-13 01:29:48,785 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-13 01:29:48,786 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-13 01:29:48,786 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-13 01:29:48,787 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-13 01:29:48,788 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-13 01:29:48,788 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-13 01:29:48,789 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-13 01:29:48,789 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-13 01:29:48,790 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-13 01:29:48,812 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-13 01:29:48,827 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:29:48,835 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 01:29:48,848 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_adb04f81-2120-4f57-a6fc-a15bf95aad7e/sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness.i[4496,4509] [2021-11-13 01:29:48,848 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_adb04f81-2120-4f57-a6fc-a15bf95aad7e/sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness.i[4556,4569] [2021-11-13 01:29:48,850 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-13 01:29:48,851 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-13 01:29:48,903 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:48,903 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:48,904 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:48,904 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:48,905 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:48,910 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:48,911 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:48,912 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:48,912 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:48,913 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:48,914 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:48,914 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:48,914 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:48,945 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-13 01:29:48,946 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-13 01:29:48,946 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-13 01:29:48,947 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-13 01:29:48,948 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-13 01:29:48,948 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-13 01:29:48,949 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-13 01:29:48,949 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-13 01:29:48,950 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-13 01:29:48,950 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-13 01:29:48,969 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-13 01:29:48,987 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:29:49,437 INFO L208 MainTranslator]: Completed translation [2021-11-13 01:29:49,438 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:29:49 WrapperNode [2021-11-13 01:29:49,438 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 01:29:49,439 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 01:29:49,440 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 01:29:49,440 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 01:29:49,447 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:29:49" (1/1) ... [2021-11-13 01:29:49,552 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:29:49" (1/1) ... [2021-11-13 01:29:49,614 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 01:29:49,615 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 01:29:49,615 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 01:29:49,615 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 01:29:49,624 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:29:49" (1/1) ... [2021-11-13 01:29:49,624 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:29:49" (1/1) ... [2021-11-13 01:29:49,638 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:29:49" (1/1) ... [2021-11-13 01:29:49,638 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:29:49" (1/1) ... [2021-11-13 01:29:49,665 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:29:49" (1/1) ... [2021-11-13 01:29:49,684 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:29:49" (1/1) ... [2021-11-13 01:29:49,690 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:29:49" (1/1) ... [2021-11-13 01:29:49,697 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 01:29:49,698 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 01:29:49,698 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 01:29:49,698 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 01:29:49,699 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:29:49" (1/1) ... [2021-11-13 01:29:49,706 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 01:29:49,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:29:49,738 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 01:29:49,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 01:29:49,802 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-13 01:29:49,802 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-13 01:29:49,802 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-13 01:29:49,802 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-13 01:29:49,802 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2021-11-13 01:29:49,803 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2021-11-13 01:29:49,803 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-13 01:29:49,803 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2021-11-13 01:29:49,804 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2021-11-13 01:29:49,804 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-13 01:29:49,804 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 01:29:49,804 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 01:29:49,804 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-13 01:29:49,804 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-13 01:29:49,804 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 01:29:49,805 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-13 01:29:49,805 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-13 01:29:49,805 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-11-13 01:29:49,805 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-11-13 01:29:50,595 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 01:29:50,596 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-13 01:29:50,598 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 01:29:50 BoogieIcfgContainer [2021-11-13 01:29:50,598 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 01:29:50,600 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 01:29:50,600 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 01:29:50,603 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 01:29:50,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 01:29:46" (1/3) ... [2021-11-13 01:29:50,604 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@535b5b25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 01:29:50, skipping insertion in model container [2021-11-13 01:29:50,604 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:29:49" (2/3) ... [2021-11-13 01:29:50,604 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@535b5b25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 01:29:50, skipping insertion in model container [2021-11-13 01:29:50,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 01:29:50" (3/3) ... [2021-11-13 01:29:50,606 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_rbegin_harness.i [2021-11-13 01:29:50,611 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 01:29:50,611 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 01:29:50,660 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 01:29:50,667 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 [2021-11-13 01:29:50,667 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 01:29:50,685 INFO L276 IsEmpty]: Start isEmpty. Operand has 69 states, 49 states have (on average 1.346938775510204) internal successors, (66), 50 states have internal predecessors, (66), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-13 01:29:50,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-13 01:29:50,693 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:29:50,694 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2021-11-13 01:29:50,694 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:29:50,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:29:50,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1062572114, now seen corresponding path program 1 times [2021-11-13 01:29:50,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:29:50,714 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [187895764] [2021-11-13 01:29:50,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:29:50,715 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:29:50,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:29:50,717 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:29:50,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-13 01:29:50,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:29:50,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-13 01:29:50,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:29:51,132 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-13 01:29:51,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:29:51,307 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-13 01:29:51,307 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:29:51,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [187895764] [2021-11-13 01:29:51,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [187895764] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:29:51,309 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:29:51,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2021-11-13 01:29:51,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169471888] [2021-11-13 01:29:51,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:29:51,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-13 01:29:51,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:29:51,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-13 01:29:51,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 01:29:51,344 INFO L87 Difference]: Start difference. First operand has 69 states, 49 states have (on average 1.346938775510204) internal successors, (66), 50 states have internal predecessors, (66), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 01:29:51,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:29:51,372 INFO L93 Difference]: Finished difference Result 130 states and 186 transitions. [2021-11-13 01:29:51,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-13 01:29:51,374 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 68 [2021-11-13 01:29:51,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:29:51,382 INFO L225 Difference]: With dead ends: 130 [2021-11-13 01:29:51,383 INFO L226 Difference]: Without dead ends: 64 [2021-11-13 01:29:51,392 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 01:29:51,397 INFO L933 BasicCegarLoop]: 88 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, 88 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.39ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-13 01:29:51,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 1.39ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-13 01:29:51,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-13 01:29:51,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-11-13 01:29:51,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 45 states have (on average 1.288888888888889) internal successors, (58), 46 states have internal predecessors, (58), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-13 01:29:51,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 83 transitions. [2021-11-13 01:29:51,467 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 83 transitions. Word has length 68 [2021-11-13 01:29:51,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:29:51,467 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 83 transitions. [2021-11-13 01:29:51,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 01:29:51,468 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 83 transitions. [2021-11-13 01:29:51,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-13 01:29:51,475 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:29:51,475 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2021-11-13 01:29:51,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-13 01:29:51,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:29:51,676 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:29:51,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:29:51,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1946087212, now seen corresponding path program 1 times [2021-11-13 01:29:51,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:29:51,678 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [983011896] [2021-11-13 01:29:51,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:29:51,679 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:29:51,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:29:51,680 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:29:51,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-13 01:29:51,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:29:51,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 01:29:51,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:29:52,070 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 01:29:52,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:29:52,314 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-13 01:29:52,314 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:29:52,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [983011896] [2021-11-13 01:29:52,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [983011896] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:29:52,315 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:29:52,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2021-11-13 01:29:52,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38448812] [2021-11-13 01:29:52,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:29:52,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 01:29:52,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:29:52,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 01:29:52,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:29:52,318 INFO L87 Difference]: Start difference. First operand 64 states and 83 transitions. Second operand has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-13 01:29:52,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:29:52,394 INFO L93 Difference]: Finished difference Result 116 states and 154 transitions. [2021-11-13 01:29:52,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 01:29:52,395 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 68 [2021-11-13 01:29:52,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:29:52,398 INFO L225 Difference]: With dead ends: 116 [2021-11-13 01:29:52,398 INFO L226 Difference]: Without dead ends: 66 [2021-11-13 01:29:52,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-13 01:29:52,400 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 2 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.66ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.93ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 39.04ms IncrementalHoareTripleChecker+Time [2021-11-13 01:29:52,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 381 Invalid, 28 Unknown, 0 Unchecked, 5.93ms Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 39.04ms Time] [2021-11-13 01:29:52,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-11-13 01:29:52,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-11-13 01:29:52,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 46 states have (on average 1.2826086956521738) internal successors, (59), 48 states have internal predecessors, (59), 13 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (15), 12 states have call predecessors, (15), 12 states have call successors, (15) [2021-11-13 01:29:52,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 87 transitions. [2021-11-13 01:29:52,414 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 87 transitions. Word has length 68 [2021-11-13 01:29:52,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:29:52,415 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 87 transitions. [2021-11-13 01:29:52,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-13 01:29:52,416 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 87 transitions. [2021-11-13 01:29:52,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-13 01:29:52,417 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:29:52,418 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2021-11-13 01:29:52,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-13 01:29:52,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:29:52,632 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:29:52,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:29:52,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1195332088, now seen corresponding path program 1 times [2021-11-13 01:29:52,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:29:52,634 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [896135586] [2021-11-13 01:29:52,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:29:52,635 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:29:52,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:29:52,635 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:29:52,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-13 01:29:52,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:29:52,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 01:29:52,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:29:53,102 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-13 01:29:53,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:29:53,443 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-13 01:29:53,444 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:29:53,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [896135586] [2021-11-13 01:29:53,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [896135586] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:29:53,444 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:29:53,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 8 [2021-11-13 01:29:53,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320975883] [2021-11-13 01:29:53,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:29:53,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 01:29:53,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:29:53,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 01:29:53,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-13 01:29:53,447 INFO L87 Difference]: Start difference. First operand 66 states and 87 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 01:29:53,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:29:53,643 INFO L93 Difference]: Finished difference Result 121 states and 163 transitions. [2021-11-13 01:29:53,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 01:29:53,644 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 70 [2021-11-13 01:29:53,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:29:53,646 INFO L225 Difference]: With dead ends: 121 [2021-11-13 01:29:53,646 INFO L226 Difference]: Without dead ends: 69 [2021-11-13 01:29:53,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-13 01:29:53,648 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 39 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 129.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.50ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 156.65ms IncrementalHoareTripleChecker+Time [2021-11-13 01:29:53,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 285 Invalid, 84 Unknown, 0 Unchecked, 3.50ms Time], IncrementalHoareTripleChecker [3 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 156.65ms Time] [2021-11-13 01:29:53,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-11-13 01:29:53,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-11-13 01:29:53,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 48 states have (on average 1.2708333333333333) internal successors, (61), 51 states have internal predecessors, (61), 13 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2021-11-13 01:29:53,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 91 transitions. [2021-11-13 01:29:53,668 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 91 transitions. Word has length 70 [2021-11-13 01:29:53,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:29:53,669 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 91 transitions. [2021-11-13 01:29:53,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 01:29:53,670 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 91 transitions. [2021-11-13 01:29:53,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-13 01:29:53,673 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:29:53,674 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2021-11-13 01:29:53,696 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-13 01:29:53,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:29:53,888 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:29:53,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:29:53,889 INFO L85 PathProgramCache]: Analyzing trace with hash -316025515, now seen corresponding path program 1 times [2021-11-13 01:29:53,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:29:53,890 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [427296236] [2021-11-13 01:29:53,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:29:53,890 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:29:53,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:29:53,891 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:29:53,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-13 01:29:54,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:29:54,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 01:29:54,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:29:54,368 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-13 01:29:54,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:29:54,745 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-13 01:29:54,745 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:29:54,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [427296236] [2021-11-13 01:29:54,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [427296236] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:29:54,745 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:29:54,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 10 [2021-11-13 01:29:54,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487830673] [2021-11-13 01:29:54,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:29:54,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 01:29:54,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:29:54,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 01:29:54,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-13 01:29:54,747 INFO L87 Difference]: Start difference. First operand 69 states and 91 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 01:29:55,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:29:55,043 INFO L93 Difference]: Finished difference Result 136 states and 187 transitions. [2021-11-13 01:29:55,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 01:29:55,044 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 72 [2021-11-13 01:29:55,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:29:55,046 INFO L225 Difference]: With dead ends: 136 [2021-11-13 01:29:55,046 INFO L226 Difference]: Without dead ends: 81 [2021-11-13 01:29:55,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-11-13 01:29:55,048 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 67 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 190.58ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.50ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 221.76ms IncrementalHoareTripleChecker+Time [2021-11-13 01:29:55,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 343 Invalid, 135 Unknown, 0 Unchecked, 3.50ms Time], IncrementalHoareTripleChecker [10 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 221.76ms Time] [2021-11-13 01:29:55,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-13 01:29:55,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 71. [2021-11-13 01:29:55,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 50 states have (on average 1.28) internal successors, (64), 53 states have internal predecessors, (64), 13 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2021-11-13 01:29:55,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 94 transitions. [2021-11-13 01:29:55,077 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 94 transitions. Word has length 72 [2021-11-13 01:29:55,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:29:55,077 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 94 transitions. [2021-11-13 01:29:55,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 01:29:55,078 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 94 transitions. [2021-11-13 01:29:55,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-13 01:29:55,083 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:29:55,083 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2021-11-13 01:29:55,102 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-13 01:29:55,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:29:55,298 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:29:55,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:29:55,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1928092350, now seen corresponding path program 1 times [2021-11-13 01:29:55,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:29:55,300 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1664528562] [2021-11-13 01:29:55,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:29:55,300 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:29:55,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:29:55,301 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:29:55,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-13 01:29:55,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:29:55,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 01:29:55,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:29:55,707 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-13 01:29:55,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:29:55,904 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-13 01:29:55,904 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:29:55,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1664528562] [2021-11-13 01:29:55,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1664528562] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:29:55,904 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:29:55,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [3] total 7 [2021-11-13 01:29:55,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949777822] [2021-11-13 01:29:55,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:29:55,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 01:29:55,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:29:55,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 01:29:55,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:29:55,906 INFO L87 Difference]: Start difference. First operand 71 states and 94 transitions. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 01:29:56,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:29:56,154 INFO L93 Difference]: Finished difference Result 137 states and 191 transitions. [2021-11-13 01:29:56,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 01:29:56,155 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 73 [2021-11-13 01:29:56,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:29:56,156 INFO L225 Difference]: With dead ends: 137 [2021-11-13 01:29:56,156 INFO L226 Difference]: Without dead ends: 80 [2021-11-13 01:29:56,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-13 01:29:56,158 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 48 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 170.30ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.03ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 202.35ms IncrementalHoareTripleChecker+Time [2021-11-13 01:29:56,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 282 Invalid, 104 Unknown, 0 Unchecked, 3.03ms Time], IncrementalHoareTripleChecker [6 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 202.35ms Time] [2021-11-13 01:29:56,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-13 01:29:56,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 72. [2021-11-13 01:29:56,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 54 states have internal predecessors, (65), 13 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2021-11-13 01:29:56,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 95 transitions. [2021-11-13 01:29:56,180 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 95 transitions. Word has length 73 [2021-11-13 01:29:56,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:29:56,181 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 95 transitions. [2021-11-13 01:29:56,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 01:29:56,181 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 95 transitions. [2021-11-13 01:29:56,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-13 01:29:56,184 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:29:56,186 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:29:56,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-13 01:29:56,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:29:56,390 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:29:56,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:29:56,391 INFO L85 PathProgramCache]: Analyzing trace with hash 137287748, now seen corresponding path program 1 times [2021-11-13 01:29:56,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:29:56,392 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [569489669] [2021-11-13 01:29:56,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:29:56,392 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:29:56,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:29:56,393 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:29:56,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-13 01:29:56,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:29:56,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 01:29:56,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:29:56,809 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 01:29:56,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:29:57,014 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-13 01:29:57,014 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:29:57,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [569489669] [2021-11-13 01:29:57,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [569489669] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:29:57,015 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:29:57,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 8 [2021-11-13 01:29:57,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128389392] [2021-11-13 01:29:57,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:29:57,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 01:29:57,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:29:57,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 01:29:57,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-13 01:29:57,016 INFO L87 Difference]: Start difference. First operand 72 states and 95 transitions. Second operand has 7 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 01:29:57,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:29:57,092 INFO L93 Difference]: Finished difference Result 136 states and 183 transitions. [2021-11-13 01:29:57,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 01:29:57,094 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 81 [2021-11-13 01:29:57,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:29:57,097 INFO L225 Difference]: With dead ends: 136 [2021-11-13 01:29:57,099 INFO L226 Difference]: Without dead ends: 78 [2021-11-13 01:29:57,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-13 01:29:57,101 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 4 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.28ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.43ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 42.53ms IncrementalHoareTripleChecker+Time [2021-11-13 01:29:57,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 473 Invalid, 41 Unknown, 0 Unchecked, 2.43ms Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 42.53ms Time] [2021-11-13 01:29:57,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-13 01:29:57,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 73. [2021-11-13 01:29:57,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 52 states have (on average 1.2692307692307692) internal successors, (66), 55 states have internal predecessors, (66), 13 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2021-11-13 01:29:57,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 96 transitions. [2021-11-13 01:29:57,130 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 96 transitions. Word has length 81 [2021-11-13 01:29:57,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:29:57,131 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 96 transitions. [2021-11-13 01:29:57,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 01:29:57,132 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 96 transitions. [2021-11-13 01:29:57,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-13 01:29:57,133 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:29:57,134 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:29:57,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-13 01:29:57,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:29:57,348 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:29:57,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:29:57,349 INFO L85 PathProgramCache]: Analyzing trace with hash 431382673, now seen corresponding path program 1 times [2021-11-13 01:29:57,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:29:57,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1985125891] [2021-11-13 01:29:57,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:29:57,349 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:29:57,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:29:57,350 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:29:57,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-13 01:29:57,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:29:57,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-13 01:29:57,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:29:58,492 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 26 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-13 01:29:58,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:29:58,916 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-13 01:29:58,916 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:29:58,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1985125891] [2021-11-13 01:29:58,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1985125891] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:29:58,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1372182796] [2021-11-13 01:29:58,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:29:58,917 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:29:58,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:29:58,919 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:29:58,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-13 01:29:59,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:29:59,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 01:29:59,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:29:59,549 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-13 01:29:59,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:29:59,793 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-13 01:29:59,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1372182796] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:29:59,794 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-13 01:29:59,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 8, 8] total 19 [2021-11-13 01:29:59,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036970730] [2021-11-13 01:29:59,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:29:59,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 01:29:59,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:29:59,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 01:29:59,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-11-13 01:29:59,796 INFO L87 Difference]: Start difference. First operand 73 states and 96 transitions. Second operand has 8 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 4 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-13 01:29:59,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:29:59,990 INFO L93 Difference]: Finished difference Result 141 states and 190 transitions. [2021-11-13 01:29:59,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-13 01:29:59,995 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 4 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 83 [2021-11-13 01:29:59,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:29:59,996 INFO L225 Difference]: With dead ends: 141 [2021-11-13 01:29:59,996 INFO L226 Difference]: Without dead ends: 82 [2021-11-13 01:29:59,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 310 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-11-13 01:29:59,998 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 8 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 50.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.71ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 60.29ms IncrementalHoareTripleChecker+Time [2021-11-13 01:29:59,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 558 Invalid, 59 Unknown, 0 Unchecked, 2.71ms Time], IncrementalHoareTripleChecker [3 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 60.29ms Time] [2021-11-13 01:30:00,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-11-13 01:30:00,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 74. [2021-11-13 01:30:00,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 53 states have (on average 1.2641509433962264) internal successors, (67), 56 states have internal predecessors, (67), 13 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2021-11-13 01:30:00,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 97 transitions. [2021-11-13 01:30:00,018 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 97 transitions. Word has length 83 [2021-11-13 01:30:00,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:30:00,019 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 97 transitions. [2021-11-13 01:30:00,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 4 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-13 01:30:00,019 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 97 transitions. [2021-11-13 01:30:00,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-13 01:30:00,020 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:30:00,021 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:30:00,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-13 01:30:00,238 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (9)] Ended with exit code 0 [2021-11-13 01:30:00,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 01:30:00,437 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:30:00,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:30:00,438 INFO L85 PathProgramCache]: Analyzing trace with hash -233275002, now seen corresponding path program 1 times [2021-11-13 01:30:00,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:30:00,438 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [932112304] [2021-11-13 01:30:00,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:30:00,439 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:30:00,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:30:00,440 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:30:00,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-13 01:30:00,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:30:00,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-13 01:30:00,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:30:02,529 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 43 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 01:30:02,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:30:05,969 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:30:05,970 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 [2021-11-13 01:30:06,016 INFO L354 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-11-13 01:30:06,016 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 [2021-11-13 01:30:06,110 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-13 01:30:06,110 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:30:06,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [932112304] [2021-11-13 01:30:06,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [932112304] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:30:06,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [459014796] [2021-11-13 01:30:06,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:30:06,111 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:30:06,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:30:06,111 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:30:06,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-13 01:30:06,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:30:06,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 01:30:06,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:30:06,609 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-13 01:30:06,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:30:06,827 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-13 01:30:06,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [459014796] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:30:06,828 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-13 01:30:06,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [13, 10, 6] total 24 [2021-11-13 01:30:06,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938969535] [2021-11-13 01:30:06,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:30:06,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 01:30:06,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:30:06,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 01:30:06,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-11-13 01:30:06,830 INFO L87 Difference]: Start difference. First operand 74 states and 97 transitions. Second operand has 6 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 01:30:06,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:30:06,901 INFO L93 Difference]: Finished difference Result 129 states and 171 transitions. [2021-11-13 01:30:06,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 01:30:06,903 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 84 [2021-11-13 01:30:06,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:30:06,904 INFO L225 Difference]: With dead ends: 129 [2021-11-13 01:30:06,905 INFO L226 Difference]: Without dead ends: 76 [2021-11-13 01:30:06,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 307 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-11-13 01:30:06,906 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 2 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.51ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.65ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 38.77ms IncrementalHoareTripleChecker+Time [2021-11-13 01:30:06,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 381 Invalid, 28 Unknown, 0 Unchecked, 1.65ms Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 38.77ms Time] [2021-11-13 01:30:06,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-13 01:30:06,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-11-13 01:30:06,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 54 states have (on average 1.2592592592592593) internal successors, (68), 58 states have internal predecessors, (68), 13 states have call successors, (13), 5 states have call predecessors, (13), 8 states have return successors, (19), 12 states have call predecessors, (19), 12 states have call successors, (19) [2021-11-13 01:30:06,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 100 transitions. [2021-11-13 01:30:06,921 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 100 transitions. Word has length 84 [2021-11-13 01:30:06,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:30:06,922 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 100 transitions. [2021-11-13 01:30:06,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 01:30:06,922 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 100 transitions. [2021-11-13 01:30:06,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-13 01:30:06,923 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:30:06,923 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:30:06,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-13 01:30:07,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-13 01:30:07,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:30:07,324 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:30:07,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:30:07,324 INFO L85 PathProgramCache]: Analyzing trace with hash 788375522, now seen corresponding path program 1 times [2021-11-13 01:30:07,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:30:07,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [226157759] [2021-11-13 01:30:07,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:30:07,325 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:30:07,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:30:07,327 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:30:07,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-13 01:30:07,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:30:07,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 01:30:07,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:30:07,801 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-13 01:30:07,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:30:08,108 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-13 01:30:08,108 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:30:08,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [226157759] [2021-11-13 01:30:08,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [226157759] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:30:08,109 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:30:08,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 9 [2021-11-13 01:30:08,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181930746] [2021-11-13 01:30:08,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:30:08,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 01:30:08,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:30:08,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 01:30:08,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-13 01:30:08,110 INFO L87 Difference]: Start difference. First operand 76 states and 100 transitions. Second operand has 7 states, 6 states have (on average 10.833333333333334) internal successors, (65), 7 states have internal predecessors, (65), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-13 01:30:08,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:30:08,371 INFO L93 Difference]: Finished difference Result 138 states and 180 transitions. [2021-11-13 01:30:08,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 01:30:08,372 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 10.833333333333334) internal successors, (65), 7 states have internal predecessors, (65), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 86 [2021-11-13 01:30:08,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:30:08,373 INFO L225 Difference]: With dead ends: 138 [2021-11-13 01:30:08,373 INFO L226 Difference]: Without dead ends: 76 [2021-11-13 01:30:08,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-13 01:30:08,375 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 44 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 177.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.70ms SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 206.83ms IncrementalHoareTripleChecker+Time [2021-11-13 01:30:08,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 338 Invalid, 112 Unknown, 0 Unchecked, 2.70ms Time], IncrementalHoareTripleChecker [17 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 206.83ms Time] [2021-11-13 01:30:08,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-13 01:30:08,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-11-13 01:30:08,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 54 states have (on average 1.2407407407407407) internal successors, (67), 58 states have internal predecessors, (67), 13 states have call successors, (13), 5 states have call predecessors, (13), 8 states have return successors, (19), 12 states have call predecessors, (19), 12 states have call successors, (19) [2021-11-13 01:30:08,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 99 transitions. [2021-11-13 01:30:08,383 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 99 transitions. Word has length 86 [2021-11-13 01:30:08,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:30:08,391 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 99 transitions. [2021-11-13 01:30:08,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 10.833333333333334) internal successors, (65), 7 states have internal predecessors, (65), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-13 01:30:08,391 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 99 transitions. [2021-11-13 01:30:08,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-13 01:30:08,392 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:30:08,392 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1] [2021-11-13 01:30:08,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-13 01:30:08,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:30:08,611 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:30:08,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:30:08,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1039859473, now seen corresponding path program 1 times [2021-11-13 01:30:08,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:30:08,612 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [55841893] [2021-11-13 01:30:08,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:30:08,612 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:30:08,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:30:08,613 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:30:08,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-13 01:30:08,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:30:08,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 01:30:08,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:30:09,051 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-13 01:30:09,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:30:09,383 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-13 01:30:09,384 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:30:09,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [55841893] [2021-11-13 01:30:09,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [55841893] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:30:09,384 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:30:09,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 11 [2021-11-13 01:30:09,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565849977] [2021-11-13 01:30:09,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:30:09,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 01:30:09,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:30:09,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 01:30:09,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-11-13 01:30:09,386 INFO L87 Difference]: Start difference. First operand 76 states and 99 transitions. Second operand has 8 states, 7 states have (on average 9.571428571428571) internal successors, (67), 8 states have internal predecessors, (67), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-13 01:30:09,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:30:09,724 INFO L93 Difference]: Finished difference Result 140 states and 183 transitions. [2021-11-13 01:30:09,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 01:30:09,726 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.571428571428571) internal successors, (67), 8 states have internal predecessors, (67), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 88 [2021-11-13 01:30:09,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:30:09,727 INFO L225 Difference]: With dead ends: 140 [2021-11-13 01:30:09,727 INFO L226 Difference]: Without dead ends: 77 [2021-11-13 01:30:09,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-11-13 01:30:09,729 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 65 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 220.44ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.99ms SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 254.25ms IncrementalHoareTripleChecker+Time [2021-11-13 01:30:09,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 389 Invalid, 154 Unknown, 0 Unchecked, 2.99ms Time], IncrementalHoareTripleChecker [25 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 254.25ms Time] [2021-11-13 01:30:09,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-11-13 01:30:09,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 72. [2021-11-13 01:30:09,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 51 states have (on average 1.2352941176470589) internal successors, (63), 54 states have internal predecessors, (63), 13 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2021-11-13 01:30:09,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 93 transitions. [2021-11-13 01:30:09,737 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 93 transitions. Word has length 88 [2021-11-13 01:30:09,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:30:09,745 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 93 transitions. [2021-11-13 01:30:09,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.571428571428571) internal successors, (67), 8 states have internal predecessors, (67), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-13 01:30:09,746 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 93 transitions. [2021-11-13 01:30:09,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-13 01:30:09,747 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:30:09,747 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:30:09,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-13 01:30:09,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:30:09,964 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:30:09,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:30:09,964 INFO L85 PathProgramCache]: Analyzing trace with hash 2465506, now seen corresponding path program 1 times [2021-11-13 01:30:09,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:30:09,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [336629408] [2021-11-13 01:30:09,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:30:09,965 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:30:09,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:30:09,966 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:30:09,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-13 01:30:10,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:30:10,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-13 01:30:10,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:30:33,776 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 51 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:30:33,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:30:56,332 INFO L354 Elim1Store]: treesize reduction 21, result has 79.6 percent of original size [2021-11-13 01:30:56,333 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 129 [2021-11-13 01:30:56,738 INFO L354 Elim1Store]: treesize reduction 8, result has 88.1 percent of original size [2021-11-13 01:30:56,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 113 treesize of output 143 [2021-11-13 01:31:02,919 INFO L354 Elim1Store]: treesize reduction 21, result has 79.6 percent of original size [2021-11-13 01:31:02,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 72 treesize of output 125 [2021-11-13 01:31:03,421 INFO L354 Elim1Store]: treesize reduction 8, result has 88.1 percent of original size [2021-11-13 01:31:03,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 113 treesize of output 143 [2021-11-13 01:31:05,269 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-13 01:31:05,269 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:31:05,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [336629408] [2021-11-13 01:31:05,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [336629408] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:31:05,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [622597373] [2021-11-13 01:31:05,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:31:05,270 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:31:05,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:31:05,275 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:31:05,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-13 01:31:05,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:31:05,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 01:31:05,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:31:06,149 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-13 01:31:06,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:31:06,471 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-13 01:31:06,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [622597373] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:31:06,472 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-13 01:31:06,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [24, 21, 7] total 46 [2021-11-13 01:31:06,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255896023] [2021-11-13 01:31:06,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:31:06,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 01:31:06,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:31:06,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 01:31:06,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1906, Unknown=11, NotChecked=0, Total=2070 [2021-11-13 01:31:06,474 INFO L87 Difference]: Start difference. First operand 72 states and 93 transitions. Second operand has 7 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 01:31:06,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:31:06,673 INFO L93 Difference]: Finished difference Result 126 states and 165 transitions. [2021-11-13 01:31:06,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 01:31:06,676 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 97 [2021-11-13 01:31:06,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:31:06,676 INFO L225 Difference]: With dead ends: 126 [2021-11-13 01:31:06,677 INFO L226 Difference]: Without dead ends: 75 [2021-11-13 01:31:06,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 339 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 38.2s TimeCoverageRelationStatistics Valid=162, Invalid=2083, Unknown=11, NotChecked=0, Total=2256 [2021-11-13 01:31:06,679 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 4 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.92ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 47.12ms IncrementalHoareTripleChecker+Time [2021-11-13 01:31:06,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 462 Invalid, 40 Unknown, 0 Unchecked, 3.92ms Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 47.12ms Time] [2021-11-13 01:31:06,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-11-13 01:31:06,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2021-11-13 01:31:06,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 52 states have (on average 1.2307692307692308) internal successors, (64), 55 states have internal predecessors, (64), 13 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2021-11-13 01:31:06,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 94 transitions. [2021-11-13 01:31:06,687 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 94 transitions. Word has length 97 [2021-11-13 01:31:06,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:31:06,688 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 94 transitions. [2021-11-13 01:31:06,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 01:31:06,688 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 94 transitions. [2021-11-13 01:31:06,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-13 01:31:06,689 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:31:06,690 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:31:06,707 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-13 01:31:06,909 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-13 01:31:07,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 01:31:07,107 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:31:07,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:31:07,108 INFO L85 PathProgramCache]: Analyzing trace with hash -385140753, now seen corresponding path program 2 times [2021-11-13 01:31:07,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:31:07,108 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1773454760] [2021-11-13 01:31:07,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 01:31:07,109 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:31:07,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:31:07,109 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:31:07,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-13 01:31:07,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 01:31:07,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 01:31:07,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-13 01:31:07,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:31:09,302 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 35 proven. 23 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-13 01:31:09,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:31:12,463 INFO L354 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-11-13 01:31:12,463 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 [2021-11-13 01:31:12,471 INFO L354 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2021-11-13 01:31:12,472 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 [2021-11-13 01:31:12,562 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-13 01:31:12,562 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:31:12,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1773454760] [2021-11-13 01:31:12,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1773454760] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:31:12,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [936199432] [2021-11-13 01:31:12,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 01:31:12,563 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:31:12,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:31:12,568 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:31:12,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-13 01:31:13,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 01:31:13,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 01:31:13,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 01:31:13,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:31:13,453 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-13 01:31:13,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:31:13,679 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-13 01:31:13,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [936199432] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:31:13,679 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-13 01:31:13,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [13, 10, 8] total 26 [2021-11-13 01:31:13,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471876142] [2021-11-13 01:31:13,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:31:13,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 01:31:13,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:31:13,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 01:31:13,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2021-11-13 01:31:13,681 INFO L87 Difference]: Start difference. First operand 73 states and 94 transitions. Second operand has 8 states, 7 states have (on average 8.714285714285714) internal successors, (61), 7 states have internal predecessors, (61), 4 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-11-13 01:31:13,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:31:13,832 INFO L93 Difference]: Finished difference Result 127 states and 165 transitions. [2021-11-13 01:31:13,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 01:31:13,834 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 8.714285714285714) internal successors, (61), 7 states have internal predecessors, (61), 4 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 99 [2021-11-13 01:31:13,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:31:13,835 INFO L225 Difference]: With dead ends: 127 [2021-11-13 01:31:13,835 INFO L226 Difference]: Without dead ends: 75 [2021-11-13 01:31:13,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 362 SyntacticMatches, 7 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2021-11-13 01:31:13,836 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 8 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 44.12ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.05ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 68.62ms IncrementalHoareTripleChecker+Time [2021-11-13 01:31:13,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 527 Invalid, 53 Unknown, 0 Unchecked, 2.05ms Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 68.62ms Time] [2021-11-13 01:31:13,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-11-13 01:31:13,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 70. [2021-11-13 01:31:13,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 50 states have (on average 1.24) internal successors, (62), 52 states have internal predecessors, (62), 13 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2021-11-13 01:31:13,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 89 transitions. [2021-11-13 01:31:13,843 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 89 transitions. Word has length 99 [2021-11-13 01:31:13,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:31:13,844 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 89 transitions. [2021-11-13 01:31:13,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 8.714285714285714) internal successors, (61), 7 states have internal predecessors, (61), 4 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-11-13 01:31:13,844 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 89 transitions. [2021-11-13 01:31:13,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-13 01:31:13,845 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:31:13,846 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:31:13,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-13 01:31:14,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-13 01:31:14,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 01:31:14,267 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:31:14,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:31:14,268 INFO L85 PathProgramCache]: Analyzing trace with hash -596272544, now seen corresponding path program 2 times [2021-11-13 01:31:14,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:31:14,269 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [95789410] [2021-11-13 01:31:14,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 01:31:14,269 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:31:14,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:31:14,270 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:31:14,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-13 01:31:14,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 01:31:14,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 01:31:14,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-13 01:31:14,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:31:16,961 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 25 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 01:31:16,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:31:20,057 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:31:20,058 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 [2021-11-13 01:31:20,074 INFO L354 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-11-13 01:31:20,074 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 [2021-11-13 01:31:20,161 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 10 proven. 33 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-13 01:31:20,161 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:31:20,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [95789410] [2021-11-13 01:31:20,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [95789410] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:31:20,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1145669572] [2021-11-13 01:31:20,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 01:31:20,162 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:31:20,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:31:20,163 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:31:20,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adb04f81-2120-4f57-a6fc-a15bf95aad7e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-13 01:31:20,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 01:31:20,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 01:31:20,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-13 01:31:20,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:31:20,890 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-13 01:31:20,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 50 [2021-11-13 01:31:29,231 WARN L227 SmtUtils]: Spent 8.33s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-13 01:31:29,231 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:31:29,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 84