./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI --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 588c504bc2fd23c9ce280a0a1b43a680048f163183a3674ad6d00cde5eb05799 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:01:39,041 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:01:39,044 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:01:39,089 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:01:39,090 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:01:39,094 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:01:39,097 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:01:39,101 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:01:39,103 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:01:39,110 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:01:39,111 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:01:39,114 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:01:39,114 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:01:39,117 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:01:39,119 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:01:39,121 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:01:39,123 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:01:39,123 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:01:39,125 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:01:39,135 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:01:39,136 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:01:39,139 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:01:39,140 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:01:39,141 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:01:39,144 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:01:39,144 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:01:39,145 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:01:39,146 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:01:39,146 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:01:39,147 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:01:39,147 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:01:39,148 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:01:39,151 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:01:39,153 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:01:39,154 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:01:39,155 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:01:39,155 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:01:39,156 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:01:39,156 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:01:39,157 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:01:39,157 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:01:39,159 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 02:01:39,203 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:01:39,203 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:01:39,204 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:01:39,204 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:01:39,205 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:01:39,205 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:01:39,205 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:01:39,206 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:01:39,206 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:01:39,206 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:01:39,207 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:01:39,207 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:01:39,207 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:01:39,207 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:01:39,208 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:01:39,208 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:01:39,208 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:01:39,208 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:01:39,209 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:01:39,209 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:01:39,209 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:01:39,209 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:01:39,210 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:01:39,210 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:01:39,210 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:01:39,210 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:01:39,210 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:01:39,211 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:01:39,211 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:01:39,211 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:01:39,211 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:01:39,212 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:01:39,212 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:01:39,212 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:01:39,212 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:01:39,212 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:01:39,212 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:01:39,213 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:01:39,213 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 588c504bc2fd23c9ce280a0a1b43a680048f163183a3674ad6d00cde5eb05799 [2022-11-03 02:01:39,532 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:01:39,554 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:01:39,557 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:01:39,558 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:01:39,559 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:01:39,560 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i [2022-11-03 02:01:39,626 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/data/21873eb92/f50ab0d5b5244bff9f7a83da03845e74/FLAGb74995959 [2022-11-03 02:01:40,426 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:01:40,427 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i [2022-11-03 02:01:40,460 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/data/21873eb92/f50ab0d5b5244bff9f7a83da03845e74/FLAGb74995959 [2022-11-03 02:01:40,964 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/data/21873eb92/f50ab0d5b5244bff9f7a83da03845e74 [2022-11-03 02:01:40,967 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:01:40,970 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:01:40,971 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:01:40,972 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:01:40,975 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:01:40,977 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:01:40" (1/1) ... [2022-11-03 02:01:40,979 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@673b02b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:01:40, skipping insertion in model container [2022-11-03 02:01:40,979 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:01:40" (1/1) ... [2022-11-03 02:01:40,987 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:01:41,096 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:01:41,376 WARN L230 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_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i[4496,4509] [2022-11-03 02:01:41,383 WARN L230 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_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i[4556,4569] [2022-11-03 02:01:42,283 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:01:42,285 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:01:42,286 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:01:42,287 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:01:42,288 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:01:42,310 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:01:42,322 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:01:42,324 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:01:42,326 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:01:42,331 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:01:42,336 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:01:42,337 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:01:42,340 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:01:42,679 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-03 02:01:42,680 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-03 02:01:42,682 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-03 02:01:42,683 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-03 02:01:42,684 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-03 02:01:42,685 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-03 02:01:42,686 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-03 02:01:42,687 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-03 02:01:42,688 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-03 02:01:42,688 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-03 02:01:42,850 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-03 02:01:42,878 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:01:42,893 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:01:42,924 WARN L230 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_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i[4496,4509] [2022-11-03 02:01:42,942 WARN L230 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_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i[4556,4569] [2022-11-03 02:01:43,030 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:01:43,035 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:01:43,035 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:01:43,036 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:01:43,037 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:01:43,045 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:01:43,046 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:01:43,047 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:01:43,047 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:01:43,048 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:01:43,049 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:01:43,050 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:01:43,050 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:01:43,096 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-03 02:01:43,097 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-03 02:01:43,098 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-03 02:01:43,099 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-03 02:01:43,100 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-03 02:01:43,101 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-03 02:01:43,101 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-03 02:01:43,102 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-03 02:01:43,102 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-03 02:01:43,103 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-03 02:01:43,126 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-03 02:01:43,142 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:01:43,340 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:01:43,340 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:01:43 WrapperNode [2022-11-03 02:01:43,340 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:01:43,342 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:01:43,342 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:01:43,342 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:01:43,348 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:01:43" (1/1) ... [2022-11-03 02:01:43,437 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:01:43" (1/1) ... [2022-11-03 02:01:43,491 INFO L138 Inliner]: procedures = 679, calls = 1048, calls flagged for inlining = 49, calls inlined = 4, statements flattened = 89 [2022-11-03 02:01:43,492 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:01:43,492 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:01:43,493 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:01:43,493 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:01:43,502 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:01:43" (1/1) ... [2022-11-03 02:01:43,502 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:01:43" (1/1) ... [2022-11-03 02:01:43,510 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:01:43" (1/1) ... [2022-11-03 02:01:43,511 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:01:43" (1/1) ... [2022-11-03 02:01:43,522 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:01:43" (1/1) ... [2022-11-03 02:01:43,527 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:01:43" (1/1) ... [2022-11-03 02:01:43,530 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:01:43" (1/1) ... [2022-11-03 02:01:43,532 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:01:43" (1/1) ... [2022-11-03 02:01:43,536 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:01:43,537 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:01:43,537 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:01:43,538 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:01:43,539 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:01:43" (1/1) ... [2022-11-03 02:01:43,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:01:43,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:01:43,579 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:01:43,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:01:43,626 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2022-11-03 02:01:43,626 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2022-11-03 02:01:43,627 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_remove [2022-11-03 02:01:43,628 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_remove [2022-11-03 02:01:43,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 02:01:43,628 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 02:01:43,628 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-03 02:01:43,629 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-03 02:01:43,629 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2022-11-03 02:01:43,629 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2022-11-03 02:01:43,629 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:01:43,629 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 02:01:43,629 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:01:43,630 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:01:43,630 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-03 02:01:43,630 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-03 02:01:43,630 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-03 02:01:43,630 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-03 02:01:43,630 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 02:01:43,631 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 02:01:43,632 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-03 02:01:43,632 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_prev_is_valid [2022-11-03 02:01:43,633 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_prev_is_valid [2022-11-03 02:01:43,633 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:01:43,950 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:01:43,952 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:01:44,268 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:01:44,437 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:01:44,437 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-03 02:01:44,439 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:01:44 BoogieIcfgContainer [2022-11-03 02:01:44,439 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:01:44,441 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:01:44,441 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:01:44,449 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:01:44,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:01:40" (1/3) ... [2022-11-03 02:01:44,451 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bacd3a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:01:44, skipping insertion in model container [2022-11-03 02:01:44,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:01:43" (2/3) ... [2022-11-03 02:01:44,452 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bacd3a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:01:44, skipping insertion in model container [2022-11-03 02:01:44,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:01:44" (3/3) ... [2022-11-03 02:01:44,456 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_remove_harness.i [2022-11-03 02:01:44,474 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:01:44,475 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:01:44,557 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:01:44,565 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@70893595, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:01:44,565 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:01:44,569 INFO L276 IsEmpty]: Start isEmpty. Operand has 52 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 28 states have internal predecessors, (33), 17 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-11-03 02:01:44,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-03 02:01:44,582 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:01:44,583 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 02:01:44,583 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:01:44,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:01:44,590 INFO L85 PathProgramCache]: Analyzing trace with hash -113877497, now seen corresponding path program 1 times [2022-11-03 02:01:44,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:01:44,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572037578] [2022-11-03 02:01:44,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:44,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:01:44,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:45,083 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:01:45,083 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:01:45,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572037578] [2022-11-03 02:01:45,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572037578] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:01:45,088 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:01:45,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:01:45,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286613262] [2022-11-03 02:01:45,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:01:45,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-03 02:01:45,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:01:45,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-03 02:01:45,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 02:01:45,138 INFO L87 Difference]: Start difference. First operand has 52 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 28 states have internal predecessors, (33), 17 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-03 02:01:45,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:01:45,219 INFO L93 Difference]: Finished difference Result 92 states and 125 transitions. [2022-11-03 02:01:45,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-03 02:01:45,223 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 30 [2022-11-03 02:01:45,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:01:45,233 INFO L225 Difference]: With dead ends: 92 [2022-11-03 02:01:45,233 INFO L226 Difference]: Without dead ends: 50 [2022-11-03 02:01:45,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 02:01:45,241 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:01:45,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 54 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:01:45,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-03 02:01:45,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-11-03 02:01:45,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 25 states have (on average 1.16) internal successors, (29), 26 states have internal predecessors, (29), 17 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-03 02:01:45,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions. [2022-11-03 02:01:45,296 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 30 [2022-11-03 02:01:45,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:01:45,298 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions. [2022-11-03 02:01:45,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-03 02:01:45,299 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions. [2022-11-03 02:01:45,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-03 02:01:45,301 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:01:45,301 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:01:45,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:01:45,305 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:01:45,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:01:45,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1025841595, now seen corresponding path program 1 times [2022-11-03 02:01:45,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:01:45,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095686139] [2022-11-03 02:01:45,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:45,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:01:45,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:45,894 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:01:45,895 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:01:45,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095686139] [2022-11-03 02:01:45,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095686139] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:01:45,896 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:01:45,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:01:45,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111264778] [2022-11-03 02:01:45,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:01:45,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:01:45,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:01:45,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:01:45,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:01:45,900 INFO L87 Difference]: Start difference. First operand 50 states and 62 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-03 02:01:46,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:01:46,099 INFO L93 Difference]: Finished difference Result 60 states and 72 transitions. [2022-11-03 02:01:46,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:01:46,100 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 35 [2022-11-03 02:01:46,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:01:46,102 INFO L225 Difference]: With dead ends: 60 [2022-11-03 02:01:46,102 INFO L226 Difference]: Without dead ends: 58 [2022-11-03 02:01:46,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:01:46,103 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 5 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:01:46,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 242 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:01:46,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-03 02:01:46,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2022-11-03 02:01:46,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 31 states have internal predecessors, (33), 18 states have call successors, (18), 8 states have call predecessors, (18), 9 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2022-11-03 02:01:46,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 69 transitions. [2022-11-03 02:01:46,115 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 69 transitions. Word has length 35 [2022-11-03 02:01:46,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:01:46,116 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 69 transitions. [2022-11-03 02:01:46,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-03 02:01:46,116 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 69 transitions. [2022-11-03 02:01:46,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 02:01:46,117 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:01:46,117 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:01:46,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 02:01:46,118 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:01:46,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:01:46,119 INFO L85 PathProgramCache]: Analyzing trace with hash -668758344, now seen corresponding path program 1 times [2022-11-03 02:01:46,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:01:46,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581146725] [2022-11-03 02:01:46,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:46,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:01:46,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:46,688 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:01:46,688 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:01:46,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581146725] [2022-11-03 02:01:46,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581146725] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:01:46,689 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:01:46,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:01:46,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320065744] [2022-11-03 02:01:46,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:01:46,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:01:46,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:01:46,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:01:46,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:01:46,693 INFO L87 Difference]: Start difference. First operand 57 states and 69 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:01:46,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:01:46,784 INFO L93 Difference]: Finished difference Result 100 states and 120 transitions. [2022-11-03 02:01:46,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:01:46,784 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 36 [2022-11-03 02:01:46,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:01:46,787 INFO L225 Difference]: With dead ends: 100 [2022-11-03 02:01:46,787 INFO L226 Difference]: Without dead ends: 58 [2022-11-03 02:01:46,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:01:46,789 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 1 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:01:46,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 154 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:01:46,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-03 02:01:46,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-11-03 02:01:46,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 32 states have internal predecessors, (34), 18 states have call successors, (18), 8 states have call predecessors, (18), 9 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2022-11-03 02:01:46,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2022-11-03 02:01:46,798 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 36 [2022-11-03 02:01:46,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:01:46,799 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2022-11-03 02:01:46,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:01:46,799 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2022-11-03 02:01:46,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-03 02:01:46,800 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:01:46,800 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:01:46,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 02:01:46,801 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:01:46,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:01:46,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1257838343, now seen corresponding path program 1 times [2022-11-03 02:01:46,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:01:46,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750288754] [2022-11-03 02:01:46,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:46,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:01:47,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:47,420 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:01:47,420 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:01:47,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750288754] [2022-11-03 02:01:47,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750288754] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:01:47,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606847009] [2022-11-03 02:01:47,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:47,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:01:47,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:01:47,430 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:01:47,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:01:47,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:47,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 02:01:47,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:01:47,873 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:01:48,128 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:01:48,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:01:48,663 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-03 02:01:48,669 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-11-03 02:01:48,732 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:01:48,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606847009] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:01:48,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1695187251] [2022-11-03 02:01:48,758 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-03 02:01:48,758 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:01:48,762 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:01:48,767 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:01:48,768 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:01:48,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:01:48,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:01:48,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:01:49,113 INFO L356 Elim1Store]: treesize reduction 312, result has 20.2 percent of original size [2022-11-03 02:01:49,114 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 21 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 23 case distinctions, treesize of input 70 treesize of output 133 [2022-11-03 02:01:49,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:01:49,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:01:49,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:01:49,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:01:49,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:01:49,194 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 29 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 179 treesize of output 91 [2022-11-03 02:01:49,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:01:49,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:01:49,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:01:49,274 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 22 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 37 [2022-11-03 02:01:49,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:01:49,299 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-03 02:01:49,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:01:49,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:01:49,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:01:49,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:01:49,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:01:49,347 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 29 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 179 treesize of output 91 [2022-11-03 02:01:49,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:01:49,428 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 19 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 26 [2022-11-03 02:01:49,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:01:49,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:01:49,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:01:49,456 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 31 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 56 [2022-11-03 02:01:49,577 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_remove with input of size 181 for LOIs [2022-11-03 02:01:50,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:01:50,987 INFO L356 Elim1Store]: treesize reduction 327, result has 24.8 percent of original size [2022-11-03 02:01:51,024 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-03 02:01:51,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:01:51,209 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: var is still there: |v_#memory_$Pointer$.base_55| input size 115 context size 115 output size 115 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1(Elim1Store.java:364) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:427) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:190) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne3(DualJunctionSaa.java:172) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne2(DualJunctionSaa.java:151) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne1(DualJunctionSaa.java:140) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne0(DualJunctionSaa.java:122) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne(DualJunctionSaa.java:108) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryExhaustivelyToEliminate(DualJunctionSaa.java:93) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:627) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:606) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:528) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:332) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:188) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:295) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:281) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:285) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:119) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-03 02:01:51,214 INFO L158 Benchmark]: Toolchain (without parser) took 10244.24ms. Allocated memory was 111.1MB in the beginning and 224.4MB in the end (delta: 113.2MB). Free memory was 66.9MB in the beginning and 78.9MB in the end (delta: -12.0MB). Peak memory consumption was 101.3MB. Max. memory is 16.1GB. [2022-11-03 02:01:51,214 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 111.1MB. Free memory is still 89.8MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:01:51,215 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2369.48ms. Allocated memory was 111.1MB in the beginning and 138.4MB in the end (delta: 27.3MB). Free memory was 66.7MB in the beginning and 63.2MB in the end (delta: 3.5MB). Peak memory consumption was 29.7MB. Max. memory is 16.1GB. [2022-11-03 02:01:51,215 INFO L158 Benchmark]: Boogie Procedure Inliner took 150.35ms. Allocated memory is still 138.4MB. Free memory was 63.2MB in the beginning and 96.5MB in the end (delta: -33.3MB). Peak memory consumption was 7.8MB. Max. memory is 16.1GB. [2022-11-03 02:01:51,215 INFO L158 Benchmark]: Boogie Preprocessor took 44.16ms. Allocated memory is still 138.4MB. Free memory was 96.5MB in the beginning and 93.6MB in the end (delta: 2.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-03 02:01:51,216 INFO L158 Benchmark]: RCFGBuilder took 902.23ms. Allocated memory is still 138.4MB. Free memory was 93.6MB in the beginning and 97.7MB in the end (delta: -4.1MB). Peak memory consumption was 37.8MB. Max. memory is 16.1GB. [2022-11-03 02:01:51,216 INFO L158 Benchmark]: TraceAbstraction took 6771.95ms. Allocated memory was 138.4MB in the beginning and 224.4MB in the end (delta: 86.0MB). Free memory was 96.9MB in the beginning and 78.9MB in the end (delta: 18.0MB). Peak memory consumption was 103.5MB. Max. memory is 16.1GB. [2022-11-03 02:01:51,218 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 111.1MB. Free memory is still 89.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2369.48ms. Allocated memory was 111.1MB in the beginning and 138.4MB in the end (delta: 27.3MB). Free memory was 66.7MB in the beginning and 63.2MB in the end (delta: 3.5MB). Peak memory consumption was 29.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 150.35ms. Allocated memory is still 138.4MB. Free memory was 63.2MB in the beginning and 96.5MB in the end (delta: -33.3MB). Peak memory consumption was 7.8MB. Max. memory is 16.1GB. * Boogie Preprocessor took 44.16ms. Allocated memory is still 138.4MB. Free memory was 96.5MB in the beginning and 93.6MB in the end (delta: 2.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 902.23ms. Allocated memory is still 138.4MB. Free memory was 93.6MB in the beginning and 97.7MB in the end (delta: -4.1MB). Peak memory consumption was 37.8MB. Max. memory is 16.1GB. * TraceAbstraction took 6771.95ms. Allocated memory was 138.4MB in the beginning and 224.4MB in the end (delta: 86.0MB). Free memory was 96.9MB in the beginning and 78.9MB in the end (delta: 18.0MB). Peak memory consumption was 103.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: var is still there: |v_#memory_$Pointer$.base_55| input size 115 context size 115 output size 115 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: var is still there: |v_#memory_$Pointer$.base_55| input size 115 context size 115 output size 115: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1(Elim1Store.java:364) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-11-03 02:01:51,255 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 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/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI --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 588c504bc2fd23c9ce280a0a1b43a680048f163183a3674ad6d00cde5eb05799 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:01:53,667 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:01:53,669 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:01:53,700 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:01:53,700 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:01:53,701 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:01:53,703 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:01:53,705 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:01:53,706 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:01:53,707 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:01:53,708 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:01:53,709 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:01:53,710 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:01:53,711 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:01:53,712 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:01:53,713 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:01:53,714 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:01:53,715 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:01:53,716 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:01:53,718 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:01:53,720 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:01:53,721 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:01:53,722 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:01:53,723 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:01:53,727 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:01:53,728 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:01:53,728 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:01:53,729 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:01:53,729 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:01:53,731 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:01:53,731 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:01:53,732 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:01:53,733 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:01:53,737 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:01:53,741 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:01:53,741 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:01:53,742 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:01:53,743 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:01:53,744 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:01:53,745 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:01:53,747 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:01:53,748 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-03 02:01:53,788 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:01:53,790 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:01:53,791 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:01:53,791 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:01:53,792 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:01:53,792 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:01:53,793 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:01:53,793 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:01:53,793 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:01:53,793 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:01:53,794 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:01:53,794 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:01:53,796 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:01:53,796 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:01:53,796 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:01:53,796 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:01:53,797 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:01:53,797 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 02:01:53,797 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 02:01:53,797 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 02:01:53,797 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:01:53,798 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:01:53,798 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:01:53,798 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:01:53,798 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 02:01:53,799 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:01:53,799 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:01:53,799 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:01:53,799 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:01:53,799 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:01:53,800 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 02:01:53,800 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 02:01:53,800 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:01:53,800 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:01:53,801 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 02:01:53,801 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_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 588c504bc2fd23c9ce280a0a1b43a680048f163183a3674ad6d00cde5eb05799 [2022-11-03 02:01:54,209 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:01:54,240 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:01:54,247 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:01:54,249 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:01:54,250 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:01:54,257 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i [2022-11-03 02:01:54,321 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/data/728cf93eb/592d81dcf150494884c9cade9dffc42a/FLAGbadec59ce [2022-11-03 02:01:55,148 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:01:55,149 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i [2022-11-03 02:01:55,183 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/data/728cf93eb/592d81dcf150494884c9cade9dffc42a/FLAGbadec59ce [2022-11-03 02:01:55,235 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/data/728cf93eb/592d81dcf150494884c9cade9dffc42a [2022-11-03 02:01:55,238 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:01:55,240 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:01:55,243 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:01:55,243 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:01:55,247 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:01:55,247 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:01:55" (1/1) ... [2022-11-03 02:01:55,249 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57f20fbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:01:55, skipping insertion in model container [2022-11-03 02:01:55,249 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:01:55" (1/1) ... [2022-11-03 02:01:55,258 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:01:55,393 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:01:55,698 WARN L230 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_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i[4496,4509] [2022-11-03 02:01:55,705 WARN L230 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_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i[4556,4569] [2022-11-03 02:01:56,644 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:01:56,646 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:01:56,646 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:01:56,647 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:01:56,648 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:01:56,663 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:01:56,663 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:01:56,665 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:01:56,666 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:01:56,674 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:01:56,675 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:01:56,676 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:01:56,677 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:01:57,105 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-03 02:01:57,106 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-03 02:01:57,110 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-03 02:01:57,111 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-03 02:01:57,113 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-03 02:01:57,117 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-03 02:01:57,118 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-03 02:01:57,119 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-03 02:01:57,119 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-03 02:01:57,120 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-03 02:01:57,259 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-03 02:01:57,283 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:01:57,316 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-03 02:01:57,360 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:01:57,365 WARN L230 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_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i[4496,4509] [2022-11-03 02:01:57,365 WARN L230 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_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i[4556,4569] [2022-11-03 02:01:57,404 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:01:57,404 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:01:57,405 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:01:57,406 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:01:57,406 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:01:57,414 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:01:57,421 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:01:57,423 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:01:57,428 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:01:57,429 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:01:57,430 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:01:57,431 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:01:57,435 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:01:57,495 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-03 02:01:57,497 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-03 02:01:57,497 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-03 02:01:57,498 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-03 02:01:57,499 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-03 02:01:57,500 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-03 02:01:57,500 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-03 02:01:57,501 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-03 02:01:57,501 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-03 02:01:57,502 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-03 02:01:57,558 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-03 02:01:57,587 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:01:57,600 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:01:57,625 WARN L230 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_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i[4496,4509] [2022-11-03 02:01:57,631 WARN L230 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_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i[4556,4569] [2022-11-03 02:01:57,692 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:01:57,693 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:01:57,693 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:01:57,694 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:01:57,694 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:01:57,705 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:01:57,706 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:01:57,708 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:01:57,711 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:01:57,712 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:01:57,713 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:01:57,713 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:01:57,714 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:01:57,755 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-03 02:01:57,756 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-03 02:01:57,757 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-03 02:01:57,757 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-03 02:01:57,758 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-03 02:01:57,759 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-03 02:01:57,759 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-03 02:01:57,759 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-03 02:01:57,760 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-03 02:01:57,760 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-03 02:01:57,810 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-03 02:01:57,831 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:01:58,133 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:01:58,141 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:01:58 WrapperNode [2022-11-03 02:01:58,141 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:01:58,142 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:01:58,143 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:01:58,143 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:01:58,151 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:01:58" (1/1) ... [2022-11-03 02:01:58,212 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:01:58" (1/1) ... [2022-11-03 02:01:58,252 INFO L138 Inliner]: procedures = 698, calls = 1048, calls flagged for inlining = 49, calls inlined = 4, statements flattened = 90 [2022-11-03 02:01:58,252 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:01:58,253 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:01:58,253 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:01:58,254 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:01:58,263 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:01:58" (1/1) ... [2022-11-03 02:01:58,264 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:01:58" (1/1) ... [2022-11-03 02:01:58,272 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:01:58" (1/1) ... [2022-11-03 02:01:58,272 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:01:58" (1/1) ... [2022-11-03 02:01:58,288 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:01:58" (1/1) ... [2022-11-03 02:01:58,293 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:01:58" (1/1) ... [2022-11-03 02:01:58,299 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:01:58" (1/1) ... [2022-11-03 02:01:58,301 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:01:58" (1/1) ... [2022-11-03 02:01:58,307 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:01:58,308 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:01:58,308 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:01:58,308 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:01:58,309 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:01:58" (1/1) ... [2022-11-03 02:01:58,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:01:58,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:01:58,358 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:01:58,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:01:58,404 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2022-11-03 02:01:58,404 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2022-11-03 02:01:58,404 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_remove [2022-11-03 02:01:58,405 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_remove [2022-11-03 02:01:58,405 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 02:01:58,406 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-03 02:01:58,407 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-03 02:01:58,407 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-03 02:01:58,407 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2022-11-03 02:01:58,407 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2022-11-03 02:01:58,408 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:01:58,408 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 02:01:58,408 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:01:58,408 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:01:58,409 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-11-03 02:01:58,409 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-03 02:01:58,410 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-03 02:01:58,410 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-03 02:01:58,410 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-03 02:01:58,411 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 02:01:58,411 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 02:01:58,411 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-03 02:01:58,411 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_prev_is_valid [2022-11-03 02:01:58,411 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_prev_is_valid [2022-11-03 02:01:58,778 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:01:58,780 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:01:59,248 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:01:59,264 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:01:59,266 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-03 02:01:59,269 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:01:59 BoogieIcfgContainer [2022-11-03 02:01:59,269 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:01:59,272 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:01:59,272 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:01:59,276 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:01:59,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:01:55" (1/3) ... [2022-11-03 02:01:59,280 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1aadc55a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:01:59, skipping insertion in model container [2022-11-03 02:01:59,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:01:58" (2/3) ... [2022-11-03 02:01:59,281 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1aadc55a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:01:59, skipping insertion in model container [2022-11-03 02:01:59,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:01:59" (3/3) ... [2022-11-03 02:01:59,283 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_remove_harness.i [2022-11-03 02:01:59,303 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:01:59,303 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:01:59,366 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:01:59,372 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6e01f121, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:01:59,372 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:01:59,378 INFO L276 IsEmpty]: Start isEmpty. Operand has 74 states, 49 states have (on average 1.2653061224489797) internal successors, (62), 50 states have internal predecessors, (62), 17 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-11-03 02:01:59,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-03 02:01:59,386 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:01:59,387 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:01:59,387 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:01:59,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:01:59,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1155526354, now seen corresponding path program 1 times [2022-11-03 02:01:59,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:01:59,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [771993054] [2022-11-03 02:01:59,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:59,407 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:01:59,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:01:59,411 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:01:59,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 02:01:59,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:59,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-03 02:01:59,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:01:59,917 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:01:59,919 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:01:59,920 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:01:59,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [771993054] [2022-11-03 02:01:59,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [771993054] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:01:59,921 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:01:59,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:01:59,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813647357] [2022-11-03 02:01:59,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:01:59,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-03 02:01:59,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:01:59,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-03 02:01:59,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 02:01:59,969 INFO L87 Difference]: Start difference. First operand has 74 states, 49 states have (on average 1.2653061224489797) internal successors, (62), 50 states have internal predecessors, (62), 17 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Second operand has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-03 02:02:00,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:02:00,026 INFO L93 Difference]: Finished difference Result 142 states and 195 transitions. [2022-11-03 02:02:00,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-03 02:02:00,031 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 48 [2022-11-03 02:02:00,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:02:00,039 INFO L225 Difference]: With dead ends: 142 [2022-11-03 02:02:00,039 INFO L226 Difference]: Without dead ends: 69 [2022-11-03 02:02:00,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 02:02:00,045 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:02:00,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:02:00,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-11-03 02:02:00,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2022-11-03 02:02:00,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 44 states have (on average 1.2045454545454546) internal successors, (53), 45 states have internal predecessors, (53), 17 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-03 02:02:00,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 86 transitions. [2022-11-03 02:02:00,089 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 86 transitions. Word has length 48 [2022-11-03 02:02:00,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:02:00,091 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 86 transitions. [2022-11-03 02:02:00,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-03 02:02:00,092 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 86 transitions. [2022-11-03 02:02:00,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-03 02:02:00,095 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:02:00,096 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:02:00,118 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:02:00,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:02:00,317 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:02:00,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:02:00,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1718448822, now seen corresponding path program 1 times [2022-11-03 02:02:00,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:02:00,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1354866282] [2022-11-03 02:02:00,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:00,319 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:02:00,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:02:00,322 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:02:00,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 02:02:00,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:00,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 02:02:00,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:00,901 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:02:00,901 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:02:00,902 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:02:00,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1354866282] [2022-11-03 02:02:00,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1354866282] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:02:00,902 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:02:00,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:02:00,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655860543] [2022-11-03 02:02:00,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:02:00,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:02:00,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:02:00,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:02:00,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:02:00,906 INFO L87 Difference]: Start difference. First operand 69 states and 86 transitions. Second operand has 7 states, 5 states have (on average 6.4) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:02:01,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:02:01,186 INFO L93 Difference]: Finished difference Result 138 states and 173 transitions. [2022-11-03 02:02:01,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:02:01,188 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 6.4) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) Word has length 54 [2022-11-03 02:02:01,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:02:01,190 INFO L225 Difference]: With dead ends: 138 [2022-11-03 02:02:01,190 INFO L226 Difference]: Without dead ends: 74 [2022-11-03 02:02:01,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:02:01,192 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 31 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:02:01,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 395 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:02:01,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-11-03 02:02:01,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-11-03 02:02:01,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 48 states have (on average 1.2083333333333333) internal successors, (58), 50 states have internal predecessors, (58), 17 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) [2022-11-03 02:02:01,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 92 transitions. [2022-11-03 02:02:01,205 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 92 transitions. Word has length 54 [2022-11-03 02:02:01,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:02:01,206 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 92 transitions. [2022-11-03 02:02:01,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 6.4) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:02:01,206 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 92 transitions. [2022-11-03 02:02:01,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-03 02:02:01,207 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:02:01,208 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:02:01,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:02:01,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:02:01,421 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:02:01,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:02:01,422 INFO L85 PathProgramCache]: Analyzing trace with hash 637356428, now seen corresponding path program 1 times [2022-11-03 02:02:01,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:02:01,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1961471257] [2022-11-03 02:02:01,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:01,423 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:02:01,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:02:01,424 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:02:01,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 02:02:01,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:01,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:02:01,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:01,874 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:02:01,874 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:02:01,875 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:02:01,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1961471257] [2022-11-03 02:02:01,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1961471257] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:02:01,875 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:02:01,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:02:01,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007024907] [2022-11-03 02:02:01,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:02:01,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:02:01,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:02:01,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:02:01,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:02:01,878 INFO L87 Difference]: Start difference. First operand 74 states and 92 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:02:01,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:02:01,922 INFO L93 Difference]: Finished difference Result 131 states and 163 transitions. [2022-11-03 02:02:01,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:02:01,923 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 54 [2022-11-03 02:02:01,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:02:01,925 INFO L225 Difference]: With dead ends: 131 [2022-11-03 02:02:01,925 INFO L226 Difference]: Without dead ends: 75 [2022-11-03 02:02:01,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:02:01,927 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 2 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:02:01,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 250 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:02:01,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-11-03 02:02:01,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-11-03 02:02:01,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 51 states have internal predecessors, (59), 17 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) [2022-11-03 02:02:01,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 93 transitions. [2022-11-03 02:02:01,938 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 93 transitions. Word has length 54 [2022-11-03 02:02:01,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:02:01,939 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 93 transitions. [2022-11-03 02:02:01,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:02:01,940 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 93 transitions. [2022-11-03 02:02:01,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-03 02:02:01,941 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:02:01,941 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:02:01,963 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-11-03 02:02:02,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:02:02,161 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:02:02,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:02:02,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1815633941, now seen corresponding path program 1 times [2022-11-03 02:02:02,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:02:02,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2058741698] [2022-11-03 02:02:02,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:02,163 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:02:02,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:02:02,164 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:02:02,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 02:02:02,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:02,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:02:02,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:02,558 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:02:02,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:02:02,736 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:02:02,737 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:02:02,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2058741698] [2022-11-03 02:02:02,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2058741698] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:02:02,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [126438130] [2022-11-03 02:02:02,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:02,738 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:02:02,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:02:02,741 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:02:02,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2022-11-03 02:02:03,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:03,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:02:03,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:03,215 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 02:02:03,215 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:02:03,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [126438130] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:02:03,216 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:02:03,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 5] total 12 [2022-11-03 02:02:03,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730507447] [2022-11-03 02:02:03,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:02:03,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:02:03,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:02:03,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:02:03,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:02:03,218 INFO L87 Difference]: Start difference. First operand 75 states and 93 transitions. Second operand has 6 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-03 02:02:03,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:02:03,316 INFO L93 Difference]: Finished difference Result 85 states and 103 transitions. [2022-11-03 02:02:03,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:02:03,317 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 55 [2022-11-03 02:02:03,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:02:03,318 INFO L225 Difference]: With dead ends: 85 [2022-11-03 02:02:03,319 INFO L226 Difference]: Without dead ends: 83 [2022-11-03 02:02:03,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:02:03,320 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 5 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:02:03,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 405 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:02:03,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-11-03 02:02:03,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2022-11-03 02:02:03,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 53 states have (on average 1.1886792452830188) internal successors, (63), 56 states have internal predecessors, (63), 18 states have call successors, (18), 8 states have call predecessors, (18), 10 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2022-11-03 02:02:03,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 100 transitions. [2022-11-03 02:02:03,334 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 100 transitions. Word has length 55 [2022-11-03 02:02:03,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:02:03,335 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 100 transitions. [2022-11-03 02:02:03,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-03 02:02:03,335 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 100 transitions. [2022-11-03 02:02:03,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-03 02:02:03,337 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:02:03,337 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:02:03,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:02:03,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:02:03,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:02:03,741 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:02:03,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:02:03,741 INFO L85 PathProgramCache]: Analyzing trace with hash -247571742, now seen corresponding path program 1 times [2022-11-03 02:02:03,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:02:03,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [616906517] [2022-11-03 02:02:03,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:03,742 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:02:03,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:02:03,744 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:02:03,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-03 02:02:04,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:04,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:02:04,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:04,161 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:02:04,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:02:04,328 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:02:04,328 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:02:04,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [616906517] [2022-11-03 02:02:04,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [616906517] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:02:04,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [91964783] [2022-11-03 02:02:04,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:04,329 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:02:04,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:02:04,333 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:02:04,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2022-11-03 02:02:04,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:04,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:02:04,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:04,959 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:02:04,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:02:05,043 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:02:05,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [91964783] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:02:05,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427723112] [2022-11-03 02:02:05,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:05,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:02:05,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:02:05,050 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:02:05,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 02:02:05,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:05,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 02:02:05,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:05,456 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-11-03 02:02:06,146 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:02:06,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:02:06,766 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2022-11-03 02:02:06,772 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2022-11-03 02:02:06,855 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:02:06,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427723112] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:02:06,856 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:02:06,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 13, 8] total 24 [2022-11-03 02:02:06,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852932899] [2022-11-03 02:02:06,857 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:02:06,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-03 02:02:06,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:02:06,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-03 02:02:06,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2022-11-03 02:02:06,859 INFO L87 Difference]: Start difference. First operand 82 states and 100 transitions. Second operand has 24 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 7 states have call successors, (19), 4 states have call predecessors, (19), 8 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2022-11-03 02:02:08,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:02:08,376 INFO L93 Difference]: Finished difference Result 154 states and 190 transitions. [2022-11-03 02:02:08,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 02:02:08,377 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 7 states have call successors, (19), 4 states have call predecessors, (19), 8 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) Word has length 55 [2022-11-03 02:02:08,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:02:08,378 INFO L225 Difference]: With dead ends: 154 [2022-11-03 02:02:08,378 INFO L226 Difference]: Without dead ends: 87 [2022-11-03 02:02:08,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 303 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=132, Invalid=860, Unknown=0, NotChecked=0, Total=992 [2022-11-03 02:02:08,380 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 59 mSDsluCounter, 820 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 892 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:02:08,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 892 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 233 Invalid, 0 Unknown, 33 Unchecked, 1.0s Time] [2022-11-03 02:02:08,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-11-03 02:02:08,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2022-11-03 02:02:08,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 58 states have (on average 1.1896551724137931) internal successors, (69), 61 states have internal predecessors, (69), 18 states have call successors, (18), 8 states have call predecessors, (18), 10 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2022-11-03 02:02:08,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 106 transitions. [2022-11-03 02:02:08,397 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 106 transitions. Word has length 55 [2022-11-03 02:02:08,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:02:08,398 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 106 transitions. [2022-11-03 02:02:08,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 7 states have call successors, (19), 4 states have call predecessors, (19), 8 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2022-11-03 02:02:08,398 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 106 transitions. [2022-11-03 02:02:08,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-03 02:02:08,400 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:02:08,400 INFO L195 NwaCegarLoop]: trace histogram [4, 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, 1] [2022-11-03 02:02:08,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:02:08,643 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-03 02:02:08,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:02:09,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:02:09,020 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:02:09,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:02:09,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1961949100, now seen corresponding path program 1 times [2022-11-03 02:02:09,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:02:09,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2089356572] [2022-11-03 02:02:09,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:09,021 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:02:09,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:02:09,022 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:02:09,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-03 02:02:09,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:09,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 02:02:09,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:09,520 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 02:02:09,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:02:09,934 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 02:02:09,934 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:02:09,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2089356572] [2022-11-03 02:02:09,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2089356572] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:02:09,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1986515899] [2022-11-03 02:02:09,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:09,936 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:02:09,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:02:09,938 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:02:09,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2022-11-03 02:02:10,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:10,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 02:02:10,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:10,660 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 02:02:10,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:02:10,829 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 02:02:10,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1986515899] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:02:10,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564983099] [2022-11-03 02:02:10,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:10,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:02:10,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:02:10,833 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:02:10,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-03 02:02:11,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:11,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:02:11,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:11,237 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 02:02:11,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:02:11,776 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 02:02:11,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564983099] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:02:11,776 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:02:11,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 20 [2022-11-03 02:02:11,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187188895] [2022-11-03 02:02:11,777 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:02:11,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-03 02:02:11,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:02:11,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-03 02:02:11,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2022-11-03 02:02:11,779 INFO L87 Difference]: Start difference. First operand 87 states and 106 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 2 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-03 02:02:12,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:02:12,943 INFO L93 Difference]: Finished difference Result 160 states and 199 transitions. [2022-11-03 02:02:12,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-03 02:02:12,944 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 2 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 61 [2022-11-03 02:02:12,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:02:12,945 INFO L225 Difference]: With dead ends: 160 [2022-11-03 02:02:12,945 INFO L226 Difference]: Without dead ends: 93 [2022-11-03 02:02:12,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 342 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=244, Invalid=406, Unknown=0, NotChecked=0, Total=650 [2022-11-03 02:02:12,947 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 32 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 656 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:02:12,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 656 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:02:12,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-11-03 02:02:12,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2022-11-03 02:02:12,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 64 states have (on average 1.171875) internal successors, (75), 67 states have internal predecessors, (75), 18 states have call successors, (18), 8 states have call predecessors, (18), 10 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2022-11-03 02:02:12,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 112 transitions. [2022-11-03 02:02:12,962 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 112 transitions. Word has length 61 [2022-11-03 02:02:12,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:02:12,962 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 112 transitions. [2022-11-03 02:02:12,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 2 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-03 02:02:12,963 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 112 transitions. [2022-11-03 02:02:12,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-03 02:02:12,964 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:02:12,964 INFO L195 NwaCegarLoop]: trace histogram [10, 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, 1] [2022-11-03 02:02:12,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2022-11-03 02:02:13,205 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-03 02:02:13,395 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:02:13,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:02:13,581 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:02:13,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:02:13,582 INFO L85 PathProgramCache]: Analyzing trace with hash 754493452, now seen corresponding path program 2 times [2022-11-03 02:02:13,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:02:13,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [119811422] [2022-11-03 02:02:13,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:02:13,582 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:02:13,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:02:13,583 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:02:13,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-03 02:02:14,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:02:14,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:02:14,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 02:02:14,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:14,325 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 02:02:14,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:02:15,484 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 02:02:15,484 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:02:15,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [119811422] [2022-11-03 02:02:15,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [119811422] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:02:15,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [29325293] [2022-11-03 02:02:15,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:02:15,485 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:02:15,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:02:15,486 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:02:15,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2022-11-03 02:02:16,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:02:16,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:02:16,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 02:02:16,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:16,693 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 02:02:16,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:02:17,018 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 02:02:17,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [29325293] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:02:17,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901286454] [2022-11-03 02:02:17,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:02:17,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:02:17,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:02:17,021 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:02:17,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-03 02:02:17,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:02:17,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:02:17,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:02:17,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:17,918 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 02:02:17,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:02:19,806 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 02:02:19,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901286454] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:02:19,807 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:02:19,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14, 14, 14, 14] total 38 [2022-11-03 02:02:19,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925345821] [2022-11-03 02:02:19,807 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:02:19,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-03 02:02:19,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:02:19,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-03 02:02:19,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=985, Unknown=0, NotChecked=0, Total=1406 [2022-11-03 02:02:19,810 INFO L87 Difference]: Start difference. First operand 93 states and 112 transitions. Second operand has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 2 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-03 02:02:26,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:02:26,513 INFO L93 Difference]: Finished difference Result 172 states and 217 transitions. [2022-11-03 02:02:26,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-03 02:02:26,517 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 2 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 67 [2022-11-03 02:02:26,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:02:26,518 INFO L225 Difference]: With dead ends: 172 [2022-11-03 02:02:26,519 INFO L226 Difference]: Without dead ends: 105 [2022-11-03 02:02:26,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 360 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=734, Invalid=1716, Unknown=0, NotChecked=0, Total=2450 [2022-11-03 02:02:26,520 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 80 mSDsluCounter, 1065 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 1148 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:02:26,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 1148 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 02:02:26,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-11-03 02:02:26,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2022-11-03 02:02:26,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 76 states have (on average 1.1578947368421053) internal successors, (88), 79 states have internal predecessors, (88), 18 states have call successors, (18), 8 states have call predecessors, (18), 10 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2022-11-03 02:02:26,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 125 transitions. [2022-11-03 02:02:26,538 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 125 transitions. Word has length 67 [2022-11-03 02:02:26,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:02:26,539 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 125 transitions. [2022-11-03 02:02:26,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 2 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-03 02:02:26,539 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 125 transitions. [2022-11-03 02:02:26,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-03 02:02:26,541 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:02:26,541 INFO L195 NwaCegarLoop]: trace histogram [16, 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, 1] [2022-11-03 02:02:26,569 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2022-11-03 02:02:26,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-03 02:02:26,963 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (14)] Ended with exit code 0 [2022-11-03 02:02:27,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:02:27,157 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:02:27,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:02:27,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1563258772, now seen corresponding path program 3 times [2022-11-03 02:02:27,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:02:27,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2135993263] [2022-11-03 02:02:27,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:02:27,159 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:02:27,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:02:27,160 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:02:27,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80aac3f8-d8c0-4ef0-ac26-cf9246f5eb43/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-03 02:02:28,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-11-03 02:02:28,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:02:28,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 74 conjunts are in the unsatisfiable core [2022-11-03 02:02:28,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:28,538 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-03 02:02:28,611 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-03 02:02:28,697 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-11-03 02:02:28,771 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-11-03 02:02:28,852 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-11-03 02:02:28,962 INFO L356 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-03 02:02:28,962 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-11-03 02:02:29,083 INFO L356 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-03 02:02:29,083 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-11-03 02:02:29,172 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-11-03 02:02:35,388 WARN L234 SmtUtils]: Spent 6.14s on a formula simplification that was a NOOP. DAG size: 18 (called from [L 353] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-03 02:02:35,389 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:02:35,389 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 42 [2022-11-03 02:02:41,634 WARN L234 SmtUtils]: Spent 6.14s on a formula simplification that was a NOOP. DAG size: 18 (called from [L 353] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-03 02:02:41,634 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:02:41,635 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 46 [2022-11-03 02:02:47,902 WARN L234 SmtUtils]: Spent 6.14s on a formula simplification that was a NOOP. DAG size: 18 (called from [L 353] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-03 02:02:47,902 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:02:47,903 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 49 [2022-11-03 02:02:54,102 WARN L234 SmtUtils]: Spent 6.07s on a formula simplification that was a NOOP. DAG size: 18 (called from [L 353] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-03 02:02:54,102 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:02:54,103 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 52 [2022-11-03 02:03:00,391 WARN L234 SmtUtils]: Spent 6.13s on a formula simplification that was a NOOP. DAG size: 18 (called from [L 353] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-03 02:03:00,392 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:03:00,392 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 55 [2022-11-03 02:03:06,634 WARN L234 SmtUtils]: Spent 6.07s on a formula simplification that was a NOOP. DAG size: 18 (called from [L 353] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-03 02:03:06,634 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:03:06,634 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 58 [2022-11-03 02:03:12,900 WARN L234 SmtUtils]: Spent 6.06s on a formula simplification that was a NOOP. DAG size: 18 (called from [L 353] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-03 02:03:12,901 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:03:12,901 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 61 [2022-11-03 02:03:16,269 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:03:16,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:06:23,661 WARN L234 SmtUtils]: Spent 3.08m on a formula simplification that was a NOOP. DAG size: 198 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-03 02:06:34,953 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 182 treesize of output 178 [2022-11-03 02:06:35,064 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5373932 treesize of output 5369836 [2022-11-03 02:08:40,186 WARN L234 SmtUtils]: Spent 2.09m on a formula simplification. DAG size of input: 3408 DAG size of output: 3408 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 02:09:00,108 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 110 [2022-11-03 02:09:03,161 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:09:03,246 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 137606762452 treesize of output 137472544708