./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_hash_table_put_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed9f16b-1fe2-4d86-a14f-7e363b6a9a28/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed9f16b-1fe2-4d86-a14f-7e363b6a9a28/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed9f16b-1fe2-4d86-a14f-7e363b6a9a28/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed9f16b-1fe2-4d86-a14f-7e363b6a9a28/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_hash_table_put_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed9f16b-1fe2-4d86-a14f-7e363b6a9a28/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed9f16b-1fe2-4d86-a14f-7e363b6a9a28/bin/utaipan-TEXQjIfE4P --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 7e3410638a547f2efce35a13c7d23c64ee660b1c493ec273ce9d4043edc218c3 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:46:32,011 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:46:32,013 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:46:32,066 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:46:32,066 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:46:32,071 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:46:32,074 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:46:32,078 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:46:32,081 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:46:32,088 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:46:32,089 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:46:32,091 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:46:32,092 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:46:32,094 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:46:32,096 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:46:32,098 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:46:32,101 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:46:32,102 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:46:32,107 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:46:32,114 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:46:32,118 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:46:32,119 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:46:32,121 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:46:32,123 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:46:32,128 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:46:32,129 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:46:32,129 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:46:32,131 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:46:32,132 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:46:32,134 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:46:32,135 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:46:32,135 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:46:32,137 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:46:32,138 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:46:32,140 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:46:32,140 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:46:32,141 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:46:32,141 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:46:32,141 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:46:32,142 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:46:32,143 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:46:32,144 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed9f16b-1fe2-4d86-a14f-7e363b6a9a28/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-21 01:46:32,197 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:46:32,197 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:46:32,198 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:46:32,198 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:46:32,205 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:46:32,205 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:46:32,205 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:46:32,206 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:46:32,206 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:46:32,206 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:46:32,207 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:46:32,208 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:46:32,208 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:46:32,208 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:46:32,208 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:46:32,209 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:46:32,209 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:46:32,216 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:46:32,217 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:46:32,217 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:46:32,217 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:46:32,218 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:46:32,218 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:46:32,218 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:46:32,218 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:46:32,219 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:46:32,220 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:46:32,220 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:46:32,221 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:46:32,221 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:46:32,221 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:46:32,222 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:46:32,222 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:46:32,222 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:46:32,222 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:46:32,223 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:46:32,223 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:46:32,223 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:46:32,223 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed9f16b-1fe2-4d86-a14f-7e363b6a9a28/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed9f16b-1fe2-4d86-a14f-7e363b6a9a28/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7e3410638a547f2efce35a13c7d23c64ee660b1c493ec273ce9d4043edc218c3 [2021-11-21 01:46:32,465 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:46:32,487 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:46:32,490 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:46:32,491 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:46:32,492 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:46:32,493 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed9f16b-1fe2-4d86-a14f-7e363b6a9a28/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/aws-c-common/aws_hash_table_put_harness.i [2021-11-21 01:46:32,552 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed9f16b-1fe2-4d86-a14f-7e363b6a9a28/bin/utaipan-TEXQjIfE4P/data/130801fb4/5d9c66ec2c164f7abe6c8b6b0f5e1df2/FLAG1a3cc6ff2 [2021-11-21 01:46:33,403 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:46:33,404 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed9f16b-1fe2-4d86-a14f-7e363b6a9a28/sv-benchmarks/c/aws-c-common/aws_hash_table_put_harness.i [2021-11-21 01:46:33,449 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed9f16b-1fe2-4d86-a14f-7e363b6a9a28/bin/utaipan-TEXQjIfE4P/data/130801fb4/5d9c66ec2c164f7abe6c8b6b0f5e1df2/FLAG1a3cc6ff2 [2021-11-21 01:46:33,854 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed9f16b-1fe2-4d86-a14f-7e363b6a9a28/bin/utaipan-TEXQjIfE4P/data/130801fb4/5d9c66ec2c164f7abe6c8b6b0f5e1df2 [2021-11-21 01:46:33,860 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:46:33,861 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:46:33,863 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:46:33,863 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:46:33,868 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:46:33,868 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:46:33" (1/1) ... [2021-11-21 01:46:33,870 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41647e32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:46:33, skipping insertion in model container [2021-11-21 01:46:33,870 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:46:33" (1/1) ... [2021-11-21 01:46:33,877 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:46:33,996 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:46:34,281 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_aed9f16b-1fe2-4d86-a14f-7e363b6a9a28/sv-benchmarks/c/aws-c-common/aws_hash_table_put_harness.i[4492,4505] [2021-11-21 01:46:34,288 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_aed9f16b-1fe2-4d86-a14f-7e363b6a9a28/sv-benchmarks/c/aws-c-common/aws_hash_table_put_harness.i[4552,4565] [2021-11-21 01:46:35,364 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:46:35,365 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:46:35,366 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:46:35,366 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:46:35,368 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:46:35,383 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:46:35,384 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:46:35,386 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:46:35,386 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:46:35,388 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:46:35,389 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:46:35,390 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:46:35,391 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:46:35,934 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-21 01:46:35,935 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-21 01:46:35,936 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-21 01:46:35,938 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-21 01:46:35,939 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-21 01:46:35,940 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-21 01:46:35,941 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-21 01:46:35,942 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-21 01:46:35,942 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-21 01:46:35,943 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-21 01:46:36,125 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-21 01:46:36,483 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:46:36,485 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:46:36,521 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:46:36,526 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:46:36,535 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:46:36,536 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:46:36,569 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:46:36,574 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:46:36,575 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:46:36,575 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:46:36,576 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:46:36,576 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:46:36,577 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:46:36,648 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:46:36,701 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:46:36,743 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_aed9f16b-1fe2-4d86-a14f-7e363b6a9a28/sv-benchmarks/c/aws-c-common/aws_hash_table_put_harness.i[4492,4505] [2021-11-21 01:46:36,744 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_aed9f16b-1fe2-4d86-a14f-7e363b6a9a28/sv-benchmarks/c/aws-c-common/aws_hash_table_put_harness.i[4552,4565] [2021-11-21 01:46:36,800 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:46:36,800 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:46:36,801 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:46:36,801 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:46:36,802 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:46:36,811 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:46:36,812 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:46:36,813 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:46:36,813 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:46:36,814 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:46:36,815 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:46:36,816 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:46:36,816 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:46:36,852 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-21 01:46:36,853 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-21 01:46:36,854 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-21 01:46:36,854 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-21 01:46:36,856 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-21 01:46:36,857 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-21 01:46:36,857 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-21 01:46:36,858 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-21 01:46:36,858 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-21 01:46:36,859 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-21 01:46:36,890 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-21 01:46:37,045 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:46:37,045 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:46:37,053 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:46:37,055 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:46:37,058 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:46:37,059 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:46:37,073 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:46:37,074 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:46:37,075 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:46:37,075 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:46:37,075 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:46:37,076 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:46:37,076 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:46:37,098 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:46:37,471 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:46:37,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:46:37 WrapperNode [2021-11-21 01:46:37,471 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:46:37,473 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:46:37,473 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:46:37,474 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:46:37,483 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:46:37" (1/1) ... [2021-11-21 01:46:37,640 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:46:37" (1/1) ... [2021-11-21 01:46:37,721 INFO L137 Inliner]: procedures = 775, calls = 2489, calls flagged for inlining = 70, calls inlined = 25, statements flattened = 1393 [2021-11-21 01:46:37,722 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:46:37,723 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:46:37,723 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:46:37,723 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:46:37,732 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:46:37" (1/1) ... [2021-11-21 01:46:37,732 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:46:37" (1/1) ... [2021-11-21 01:46:37,743 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:46:37" (1/1) ... [2021-11-21 01:46:37,744 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:46:37" (1/1) ... [2021-11-21 01:46:37,799 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:46:37" (1/1) ... [2021-11-21 01:46:37,807 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:46:37" (1/1) ... [2021-11-21 01:46:37,820 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:46:37" (1/1) ... [2021-11-21 01:46:37,840 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:46:37,841 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:46:37,841 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:46:37,841 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:46:37,842 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:46:37" (1/1) ... [2021-11-21 01:46:37,865 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:46:37,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed9f16b-1fe2-4d86-a14f-7e363b6a9a28/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:46:37,923 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed9f16b-1fe2-4d86-a14f-7e363b6a9a28/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:46:37,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed9f16b-1fe2-4d86-a14f-7e363b6a9a28/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:46:37,966 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2021-11-21 01:46:37,967 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-11-21 01:46:37,967 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-11-21 01:46:37,967 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 01:46:37,967 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2021-11-21 01:46:37,967 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2021-11-21 01:46:37,968 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-21 01:46:37,968 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-21 01:46:37,968 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_is_valid [2021-11-21 01:46:37,968 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_is_valid [2021-11-21 01:46:37,968 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-21 01:46:37,968 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:46:37,969 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-21 01:46:37,969 INFO L130 BoogieDeclarations]: Found specification of procedure s_emplace_item [2021-11-21 01:46:37,969 INFO L138 BoogieDeclarations]: Found implementation of procedure s_emplace_item [2021-11-21 01:46:37,969 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:46:37,969 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:46:37,970 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-21 01:46:37,970 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-21 01:46:37,970 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2021-11-21 01:46:37,971 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2021-11-21 01:46:37,971 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_release [2021-11-21 01:46:37,971 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_release [2021-11-21 01:46:37,971 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 01:46:37,971 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_plus [2021-11-21 01:46:37,971 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_plus [2021-11-21 01:46:37,972 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-21 01:46:37,972 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-11-21 01:46:37,972 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-11-21 01:46:37,972 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 01:46:37,972 INFO L130 BoogieDeclarations]: Found specification of procedure s_hash_for [2021-11-21 01:46:37,973 INFO L138 BoogieDeclarations]: Found implementation of procedure s_hash_for [2021-11-21 01:46:37,973 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_power_of_two [2021-11-21 01:46:37,973 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_power_of_two [2021-11-21 01:46:37,974 INFO L130 BoogieDeclarations]: Found specification of procedure s_update_template_size [2021-11-21 01:46:37,974 INFO L138 BoogieDeclarations]: Found implementation of procedure s_update_template_size [2021-11-21 01:46:37,977 INFO L130 BoogieDeclarations]: Found specification of procedure s_hash_keys_eq [2021-11-21 01:46:37,977 INFO L138 BoogieDeclarations]: Found implementation of procedure s_hash_keys_eq [2021-11-21 01:46:37,977 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_uninterpreted_equals [2021-11-21 01:46:37,978 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_uninterpreted_equals [2021-11-21 01:46:37,978 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 01:46:37,978 INFO L130 BoogieDeclarations]: Found specification of procedure aws_allocator_is_valid [2021-11-21 01:46:37,978 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_allocator_is_valid [2021-11-21 01:46:37,979 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real [2021-11-21 01:46:37,979 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_calloc [2021-11-21 01:46:37,985 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_calloc [2021-11-21 01:46:37,985 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-11-21 01:46:37,986 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_required_bytes [2021-11-21 01:46:37,986 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_required_bytes [2021-11-21 01:46:37,986 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-21 01:46:37,986 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-21 01:46:37,986 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_uninterpreted_hasher [2021-11-21 01:46:37,986 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_uninterpreted_hasher [2021-11-21 01:46:37,987 INFO L130 BoogieDeclarations]: Found specification of procedure s_safe_eq_check [2021-11-21 01:46:37,987 INFO L138 BoogieDeclarations]: Found implementation of procedure s_safe_eq_check [2021-11-21 01:46:37,987 INFO L130 BoogieDeclarations]: Found specification of procedure s_find_entry [2021-11-21 01:46:37,987 INFO L138 BoogieDeclarations]: Found implementation of procedure s_find_entry [2021-11-21 01:46:37,987 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-21 01:46:37,987 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-21 01:46:37,988 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_table_is_valid [2021-11-21 01:46:37,988 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_table_is_valid [2021-11-21 01:46:37,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-21 01:46:37,988 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-11-21 01:46:37,988 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-11-21 01:46:37,988 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2021-11-21 01:46:37,989 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2021-11-21 01:46:37,989 INFO L130 BoogieDeclarations]: Found specification of procedure aws_add_size_checked [2021-11-21 01:46:37,989 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_add_size_checked [2021-11-21 01:46:37,989 INFO L130 BoogieDeclarations]: Found specification of procedure s_alloc_state [2021-11-21 01:46:37,989 INFO L138 BoogieDeclarations]: Found implementation of procedure s_alloc_state [2021-11-21 01:46:37,989 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-21 01:46:37,989 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-21 01:46:37,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:46:38,559 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:46:38,562 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:46:38,850 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##5: assume !true; [2021-11-21 01:46:38,901 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume !true; [2021-11-21 01:46:39,475 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##7: assume !true; [2021-11-21 01:46:39,475 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##29: assume !true; [2021-11-21 01:46:40,384 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:46:40,665 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:46:40,665 INFO L301 CfgBuilder]: Removed 11 assume(true) statements. [2021-11-21 01:46:40,669 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:46:40 BoogieIcfgContainer [2021-11-21 01:46:40,670 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:46:40,672 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:46:40,672 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:46:40,675 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:46:40,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:46:33" (1/3) ... [2021-11-21 01:46:40,676 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f1eda43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:46:40, skipping insertion in model container [2021-11-21 01:46:40,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:46:37" (2/3) ... [2021-11-21 01:46:40,677 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f1eda43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:46:40, skipping insertion in model container [2021-11-21 01:46:40,677 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:46:40" (3/3) ... [2021-11-21 01:46:40,679 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_hash_table_put_harness.i [2021-11-21 01:46:40,687 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:46:40,687 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 01:46:40,750 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:46:40,770 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-21 01:46:40,771 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 01:46:40,803 INFO L276 IsEmpty]: Start isEmpty. Operand has 286 states, 173 states have (on average 1.260115606936416) internal successors, (218), 170 states have internal predecessors, (218), 86 states have call successors, (86), 29 states have call predecessors, (86), 29 states have return successors, (86), 86 states have call predecessors, (86), 86 states have call successors, (86) [2021-11-21 01:46:40,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-21 01:46:40,816 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:46:40,817 INFO L514 BasicCegarLoop]: trace histogram [9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:46:40,818 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:46:40,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:46:40,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1011357484, now seen corresponding path program 1 times [2021-11-21 01:46:40,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:46:40,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223340632] [2021-11-21 01:46:40,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:46:40,839 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:46:41,132 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:46:41,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1448874972] [2021-11-21 01:46:41,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:46:41,134 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:46:41,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed9f16b-1fe2-4d86-a14f-7e363b6a9a28/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:46:41,135 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed9f16b-1fe2-4d86-a14f-7e363b6a9a28/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:46:41,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed9f16b-1fe2-4d86-a14f-7e363b6a9a28/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 01:46:41,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:46:41,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 2322 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 01:46:41,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:46:42,190 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-21 01:46:42,190 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:46:42,190 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:46:42,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223340632] [2021-11-21 01:46:42,191 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:46:42,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448874972] [2021-11-21 01:46:42,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448874972] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:46:42,191 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:46:42,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:46:42,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438979952] [2021-11-21 01:46:42,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:46:42,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:46:42,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:46:42,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:46:42,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:46:42,253 INFO L87 Difference]: Start difference. First operand has 286 states, 173 states have (on average 1.260115606936416) internal successors, (218), 170 states have internal predecessors, (218), 86 states have call successors, (86), 29 states have call predecessors, (86), 29 states have return successors, (86), 86 states have call predecessors, (86), 86 states have call successors, (86) Second operand has 5 states, 4 states have (on average 10.75) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-21 01:46:43,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:46:43,895 INFO L93 Difference]: Finished difference Result 568 states and 799 transitions. [2021-11-21 01:46:43,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:46:43,897 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 10.75) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) Word has length 95 [2021-11-21 01:46:43,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:46:43,912 INFO L225 Difference]: With dead ends: 568 [2021-11-21 01:46:43,912 INFO L226 Difference]: Without dead ends: 288 [2021-11-21 01:46:43,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:46:43,922 INFO L933 BasicCegarLoop]: 334 mSDtfsCounter, 1 mSDsluCounter, 1133 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 1332 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:46:43,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 1332 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-21 01:46:43,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-11-21 01:46:43,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 288. [2021-11-21 01:46:43,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 171 states have (on average 1.239766081871345) internal successors, (212), 172 states have internal predecessors, (212), 86 states have call successors, (86), 29 states have call predecessors, (86), 30 states have return successors, (89), 86 states have call predecessors, (89), 85 states have call successors, (89) [2021-11-21 01:46:43,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 387 transitions. [2021-11-21 01:46:43,996 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 387 transitions. Word has length 95 [2021-11-21 01:46:43,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:46:43,996 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 387 transitions. [2021-11-21 01:46:43,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 10.75) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-21 01:46:43,997 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 387 transitions. [2021-11-21 01:46:44,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-21 01:46:44,003 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:46:44,003 INFO L514 BasicCegarLoop]: trace histogram [9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:46:44,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed9f16b-1fe2-4d86-a14f-7e363b6a9a28/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 01:46:44,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed9f16b-1fe2-4d86-a14f-7e363b6a9a28/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:46:44,230 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:46:44,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:46:44,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1152988102, now seen corresponding path program 1 times [2021-11-21 01:46:44,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:46:44,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179613895] [2021-11-21 01:46:44,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:46:44,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:46:44,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:46:44,843 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-21 01:46:44,843 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:46:44,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179613895] [2021-11-21 01:46:44,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179613895] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:46:44,843 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:46:44,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:46:44,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675227985] [2021-11-21 01:46:44,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:46:44,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:46:44,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:46:44,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:46:44,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:46:44,846 INFO L87 Difference]: Start difference. First operand 288 states and 387 transitions. Second operand has 5 states, 3 states have (on average 14.666666666666666) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 3 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-21 01:46:46,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:46:46,461 INFO L93 Difference]: Finished difference Result 539 states and 727 transitions. [2021-11-21 01:46:46,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:46:46,461 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 14.666666666666666) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 3 states have call predecessors, (22), 2 states have call successors, (22) Word has length 99 [2021-11-21 01:46:46,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:46:46,467 INFO L225 Difference]: With dead ends: 539 [2021-11-21 01:46:46,467 INFO L226 Difference]: Without dead ends: 290 [2021-11-21 01:46:46,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:46:46,469 INFO L933 BasicCegarLoop]: 315 mSDtfsCounter, 0 mSDsluCounter, 1056 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1238 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:46:46,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1238 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-21 01:46:46,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-11-21 01:46:46,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 290. [2021-11-21 01:46:46,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 172 states have (on average 1.2383720930232558) internal successors, (213), 174 states have internal predecessors, (213), 86 states have call successors, (86), 29 states have call predecessors, (86), 31 states have return successors, (95), 86 states have call predecessors, (95), 85 states have call successors, (95) [2021-11-21 01:46:46,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 394 transitions. [2021-11-21 01:46:46,520 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 394 transitions. Word has length 99 [2021-11-21 01:46:46,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:46:46,521 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 394 transitions. [2021-11-21 01:46:46,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 14.666666666666666) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 3 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-21 01:46:46,521 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 394 transitions. [2021-11-21 01:46:46,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-21 01:46:46,526 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:46:46,526 INFO L514 BasicCegarLoop]: trace histogram [9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:46:46,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 01:46:46,527 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:46:46,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:46:46,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1870407073, now seen corresponding path program 1 times [2021-11-21 01:46:46,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:46:46,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790585557] [2021-11-21 01:46:46,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:46:46,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:46:46,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:46:46,968 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-11-21 01:46:46,968 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:46:46,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790585557] [2021-11-21 01:46:46,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790585557] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:46:46,969 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:46:46,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:46:46,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985860525] [2021-11-21 01:46:46,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:46:46,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:46:46,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:46:46,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:46:46,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:46:46,972 INFO L87 Difference]: Start difference. First operand 290 states and 394 transitions. Second operand has 5 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 1 states have call predecessors, (23), 1 states have call successors, (23) [2021-11-21 01:46:48,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:46:48,550 INFO L93 Difference]: Finished difference Result 298 states and 401 transitions. [2021-11-21 01:46:48,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:46:48,550 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 1 states have call predecessors, (23), 1 states have call successors, (23) Word has length 103 [2021-11-21 01:46:48,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:46:48,555 INFO L225 Difference]: With dead ends: 298 [2021-11-21 01:46:48,555 INFO L226 Difference]: Without dead ends: 296 [2021-11-21 01:46:48,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:46:48,557 INFO L933 BasicCegarLoop]: 334 mSDtfsCounter, 8 mSDsluCounter, 1118 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 1318 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:46:48,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 1318 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-21 01:46:48,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-11-21 01:46:48,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 294. [2021-11-21 01:46:48,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 175 states have (on average 1.2342857142857142) internal successors, (216), 177 states have internal predecessors, (216), 86 states have call successors, (86), 30 states have call predecessors, (86), 32 states have return successors, (95), 86 states have call predecessors, (95), 85 states have call successors, (95) [2021-11-21 01:46:48,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 397 transitions. [2021-11-21 01:46:48,585 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 397 transitions. Word has length 103 [2021-11-21 01:46:48,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:46:48,586 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 397 transitions. [2021-11-21 01:46:48,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 1 states have call predecessors, (23), 1 states have call successors, (23) [2021-11-21 01:46:48,587 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 397 transitions. [2021-11-21 01:46:48,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-21 01:46:48,593 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:46:48,593 INFO L514 BasicCegarLoop]: trace histogram [9, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:46:48,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 01:46:48,594 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:46:48,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:46:48,594 INFO L85 PathProgramCache]: Analyzing trace with hash -984486832, now seen corresponding path program 1 times [2021-11-21 01:46:48,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:46:48,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570609787] [2021-11-21 01:46:48,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:46:48,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:46:48,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:46:49,140 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-11-21 01:46:49,140 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:46:49,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570609787] [2021-11-21 01:46:49,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570609787] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:46:49,140 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:46:49,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-21 01:46:49,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581840572] [2021-11-21 01:46:49,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:46:49,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 01:46:49,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:46:49,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 01:46:49,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:46:49,142 INFO L87 Difference]: Start difference. First operand 294 states and 397 transitions. Second operand has 8 states, 6 states have (on average 8.166666666666666) internal successors, (49), 7 states have internal predecessors, (49), 4 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-21 01:46:51,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:46:51,347 INFO L93 Difference]: Finished difference Result 572 states and 771 transitions. [2021-11-21 01:46:51,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 01:46:51,348 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 8.166666666666666) internal successors, (49), 7 states have internal predecessors, (49), 4 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) Word has length 112 [2021-11-21 01:46:51,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:46:51,351 INFO L225 Difference]: With dead ends: 572 [2021-11-21 01:46:51,351 INFO L226 Difference]: Without dead ends: 296 [2021-11-21 01:46:51,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-21 01:46:51,355 INFO L933 BasicCegarLoop]: 328 mSDtfsCounter, 64 mSDsluCounter, 1604 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 1765 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:46:51,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 1765 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-21 01:46:51,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-11-21 01:46:51,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 296. [2021-11-21 01:46:51,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 176 states have (on average 1.2329545454545454) internal successors, (217), 179 states have internal predecessors, (217), 86 states have call successors, (86), 30 states have call predecessors, (86), 33 states have return successors, (96), 86 states have call predecessors, (96), 85 states have call successors, (96) [2021-11-21 01:46:51,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 399 transitions. [2021-11-21 01:46:51,402 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 399 transitions. Word has length 112 [2021-11-21 01:46:51,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:46:51,403 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 399 transitions. [2021-11-21 01:46:51,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 8.166666666666666) internal successors, (49), 7 states have internal predecessors, (49), 4 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-21 01:46:51,403 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 399 transitions. [2021-11-21 01:46:51,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-21 01:46:51,417 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:46:51,417 INFO L514 BasicCegarLoop]: trace histogram [9, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:46:51,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-21 01:46:51,421 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:46:51,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:46:51,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1733541518, now seen corresponding path program 1 times [2021-11-21 01:46:51,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:46:51,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694105285] [2021-11-21 01:46:51,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:46:51,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:46:51,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:46:51,690 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-21 01:46:51,690 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:46:51,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694105285] [2021-11-21 01:46:51,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694105285] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:46:51,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380946947] [2021-11-21 01:46:51,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:46:51,691 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:46:51,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed9f16b-1fe2-4d86-a14f-7e363b6a9a28/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:46:51,694 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed9f16b-1fe2-4d86-a14f-7e363b6a9a28/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:46:51,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed9f16b-1fe2-4d86-a14f-7e363b6a9a28/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 01:46:52,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:46:52,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 2418 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-21 01:46:52,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:46:52,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:46:53,092 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-21 01:46:53,093 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:46:53,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380946947] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:46:53,093 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:46:53,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [11] total 20 [2021-11-21 01:46:53,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323221132] [2021-11-21 01:46:53,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:46:53,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-21 01:46:53,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:46:53,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-21 01:46:53,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-11-21 01:46:53,095 INFO L87 Difference]: Start difference. First operand 296 states and 399 transitions. Second operand has 12 states, 9 states have (on average 6.111111111111111) internal successors, (55), 10 states have internal predecessors, (55), 5 states have call successors, (28), 3 states have call predecessors, (28), 5 states have return successors, (26), 5 states have call predecessors, (26), 5 states have call successors, (26) [2021-11-21 01:46:54,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:46:54,853 INFO L93 Difference]: Finished difference Result 585 states and 786 transitions. [2021-11-21 01:46:54,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-21 01:46:54,854 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 6.111111111111111) internal successors, (55), 10 states have internal predecessors, (55), 5 states have call successors, (28), 3 states have call predecessors, (28), 5 states have return successors, (26), 5 states have call predecessors, (26), 5 states have call successors, (26) Word has length 118 [2021-11-21 01:46:54,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:46:54,857 INFO L225 Difference]: With dead ends: 585 [2021-11-21 01:46:54,858 INFO L226 Difference]: Without dead ends: 301 [2021-11-21 01:46:54,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-11-21 01:46:54,860 INFO L933 BasicCegarLoop]: 328 mSDtfsCounter, 66 mSDsluCounter, 1326 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 1521 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-21 01:46:54,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 1521 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 203 Invalid, 0 Unknown, 89 Unchecked, 1.7s Time] [2021-11-21 01:46:54,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-11-21 01:46:54,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 301. [2021-11-21 01:46:54,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 180 states have (on average 1.2277777777777779) internal successors, (221), 182 states have internal predecessors, (221), 87 states have call successors, (87), 32 states have call predecessors, (87), 33 states have return successors, (97), 86 states have call predecessors, (97), 86 states have call successors, (97) [2021-11-21 01:46:54,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 405 transitions. [2021-11-21 01:46:54,882 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 405 transitions. Word has length 118 [2021-11-21 01:46:54,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:46:54,883 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 405 transitions. [2021-11-21 01:46:54,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 6.111111111111111) internal successors, (55), 10 states have internal predecessors, (55), 5 states have call successors, (28), 3 states have call predecessors, (28), 5 states have return successors, (26), 5 states have call predecessors, (26), 5 states have call successors, (26) [2021-11-21 01:46:54,884 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 405 transitions. [2021-11-21 01:46:54,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-21 01:46:54,885 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:46:54,886 INFO L514 BasicCegarLoop]: trace histogram [9, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:46:54,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed9f16b-1fe2-4d86-a14f-7e363b6a9a28/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 01:46:55,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed9f16b-1fe2-4d86-a14f-7e363b6a9a28/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:46:55,102 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:46:55,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:46:55,102 INFO L85 PathProgramCache]: Analyzing trace with hash -196729289, now seen corresponding path program 1 times [2021-11-21 01:46:55,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:46:55,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114318053] [2021-11-21 01:46:55,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:46:55,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:46:55,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:46:55,864 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-11-21 01:46:55,864 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:46:55,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114318053] [2021-11-21 01:46:55,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114318053] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:46:55,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121952567] [2021-11-21 01:46:55,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:46:55,865 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:46:55,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed9f16b-1fe2-4d86-a14f-7e363b6a9a28/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:46:55,866 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed9f16b-1fe2-4d86-a14f-7e363b6a9a28/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:46:55,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed9f16b-1fe2-4d86-a14f-7e363b6a9a28/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 01:46:56,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:46:56,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 2447 conjuncts, 58 conjunts are in the unsatisfiable core [2021-11-21 01:46:56,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:46:56,914 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-21 01:46:56,915 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:46:56,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121952567] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:46:56,915 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:46:56,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 8 [2021-11-21 01:46:56,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394777527] [2021-11-21 01:46:56,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:46:56,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:46:56,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:46:56,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:46:56,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:46:56,917 INFO L87 Difference]: Start difference. First operand 301 states and 405 transitions. Second operand has 6 states, 5 states have (on average 10.6) internal successors, (53), 6 states have internal predecessors, (53), 4 states have call successors, (28), 2 states have call predecessors, (28), 4 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-21 01:46:59,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:46:59,850 INFO L93 Difference]: Finished difference Result 596 states and 800 transitions. [2021-11-21 01:46:59,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:46:59,851 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 6 states have internal predecessors, (53), 4 states have call successors, (28), 2 states have call predecessors, (28), 4 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) Word has length 122 [2021-11-21 01:46:59,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:46:59,854 INFO L225 Difference]: With dead ends: 596 [2021-11-21 01:46:59,854 INFO L226 Difference]: Without dead ends: 303 [2021-11-21 01:46:59,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:46:59,856 INFO L933 BasicCegarLoop]: 310 mSDtfsCounter, 65 mSDsluCounter, 1270 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 1429 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-21 01:46:59,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 1429 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-11-21 01:46:59,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-11-21 01:46:59,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 303. [2021-11-21 01:46:59,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 181 states have (on average 1.2265193370165746) internal successors, (222), 184 states have internal predecessors, (222), 87 states have call successors, (87), 32 states have call predecessors, (87), 34 states have return successors, (98), 86 states have call predecessors, (98), 86 states have call successors, (98) [2021-11-21 01:46:59,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 407 transitions. [2021-11-21 01:46:59,884 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 407 transitions. Word has length 122 [2021-11-21 01:46:59,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:46:59,885 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 407 transitions. [2021-11-21 01:46:59,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 6 states have internal predecessors, (53), 4 states have call successors, (28), 2 states have call predecessors, (28), 4 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-21 01:46:59,885 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 407 transitions. [2021-11-21 01:46:59,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-21 01:46:59,887 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:46:59,887 INFO L514 BasicCegarLoop]: trace histogram [9, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:46:59,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed9f16b-1fe2-4d86-a14f-7e363b6a9a28/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 01:47:00,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed9f16b-1fe2-4d86-a14f-7e363b6a9a28/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:47:00,110 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:47:00,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:47:00,110 INFO L85 PathProgramCache]: Analyzing trace with hash -624809405, now seen corresponding path program 1 times [2021-11-21 01:47:00,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:47:00,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837620762] [2021-11-21 01:47:00,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:47:00,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:47:00,167 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:47:00,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2053615455] [2021-11-21 01:47:00,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:47:00,168 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:47:00,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed9f16b-1fe2-4d86-a14f-7e363b6a9a28/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:47:00,169 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed9f16b-1fe2-4d86-a14f-7e363b6a9a28/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:47:00,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed9f16b-1fe2-4d86-a14f-7e363b6a9a28/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 01:47:01,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:47:01,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 2519 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-21 01:47:01,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:47:01,437 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-11-21 01:47:01,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:47:01,907 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-21 01:47:01,907 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:47:01,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837620762] [2021-11-21 01:47:01,908 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:47:01,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053615455] [2021-11-21 01:47:01,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053615455] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-21 01:47:01,908 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:47:01,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 13 [2021-11-21 01:47:01,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305540217] [2021-11-21 01:47:01,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:47:01,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:47:01,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:47:01,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:47:01,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-11-21 01:47:01,910 INFO L87 Difference]: Start difference. First operand 303 states and 407 transitions. Second operand has 5 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) [2021-11-21 01:47:03,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:47:03,805 INFO L93 Difference]: Finished difference Result 311 states and 414 transitions. [2021-11-21 01:47:03,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:47:03,805 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) Word has length 127 [2021-11-21 01:47:03,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:47:03,808 INFO L225 Difference]: With dead ends: 311 [2021-11-21 01:47:03,808 INFO L226 Difference]: Without dead ends: 309 [2021-11-21 01:47:03,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-11-21 01:47:03,810 INFO L933 BasicCegarLoop]: 336 mSDtfsCounter, 6 mSDsluCounter, 1121 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 1323 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-21 01:47:03,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 1323 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-21 01:47:03,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-11-21 01:47:03,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 307. [2021-11-21 01:47:03,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 184 states have (on average 1.2228260869565217) internal successors, (225), 187 states have internal predecessors, (225), 87 states have call successors, (87), 33 states have call predecessors, (87), 35 states have return successors, (98), 86 states have call predecessors, (98), 86 states have call successors, (98) [2021-11-21 01:47:03,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 410 transitions. [2021-11-21 01:47:03,830 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 410 transitions. Word has length 127 [2021-11-21 01:47:03,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:47:03,831 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 410 transitions. [2021-11-21 01:47:03,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) [2021-11-21 01:47:03,831 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 410 transitions. [2021-11-21 01:47:03,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-21 01:47:03,834 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:47:03,834 INFO L514 BasicCegarLoop]: trace histogram [9, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:47:03,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed9f16b-1fe2-4d86-a14f-7e363b6a9a28/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-21 01:47:04,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed9f16b-1fe2-4d86-a14f-7e363b6a9a28/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-21 01:47:04,054 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:47:04,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:47:04,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1461172860, now seen corresponding path program 1 times [2021-11-21 01:47:04,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:47:04,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913675143] [2021-11-21 01:47:04,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:47:04,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:47:04,127 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:47:04,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1265663873] [2021-11-21 01:47:04,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:47:04,128 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:47:04,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed9f16b-1fe2-4d86-a14f-7e363b6a9a28/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:47:04,129 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed9f16b-1fe2-4d86-a14f-7e363b6a9a28/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:47:04,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed9f16b-1fe2-4d86-a14f-7e363b6a9a28/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 01:47:04,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:47:04,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 2595 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 01:47:04,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:47:04,991 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-21 01:47:04,992 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:47:04,992 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:47:04,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913675143] [2021-11-21 01:47:04,992 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:47:04,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265663873] [2021-11-21 01:47:04,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265663873] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:47:04,992 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:47:04,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:47:04,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118751653] [2021-11-21 01:47:04,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:47:04,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:47:04,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:47:04,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:47:04,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:47:04,994 INFO L87 Difference]: Start difference. First operand 307 states and 410 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 2 states have call predecessors, (27), 1 states have call successors, (27) [2021-11-21 01:47:06,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:47:06,709 INFO L93 Difference]: Finished difference Result 407 states and 550 transitions. [2021-11-21 01:47:06,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:47:06,710 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 2 states have call predecessors, (27), 1 states have call successors, (27) Word has length 132 [2021-11-21 01:47:06,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:47:06,713 INFO L225 Difference]: With dead ends: 407 [2021-11-21 01:47:06,713 INFO L226 Difference]: Without dead ends: 359 [2021-11-21 01:47:06,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:47:06,714 INFO L933 BasicCegarLoop]: 381 mSDtfsCounter, 47 mSDsluCounter, 1236 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 1482 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-21 01:47:06,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 1482 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-21 01:47:06,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-11-21 01:47:06,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 311. [2021-11-21 01:47:06,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 187 states have (on average 1.2192513368983957) internal successors, (228), 190 states have internal predecessors, (228), 87 states have call successors, (87), 33 states have call predecessors, (87), 36 states have return successors, (99), 87 states have call predecessors, (99), 86 states have call successors, (99) [2021-11-21 01:47:06,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 414 transitions. [2021-11-21 01:47:06,735 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 414 transitions. Word has length 132 [2021-11-21 01:47:06,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:47:06,736 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 414 transitions. [2021-11-21 01:47:06,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 2 states have call predecessors, (27), 1 states have call successors, (27) [2021-11-21 01:47:06,737 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 414 transitions. [2021-11-21 01:47:06,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-21 01:47:06,739 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:47:06,739 INFO L514 BasicCegarLoop]: trace histogram [9, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:47:06,766 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed9f16b-1fe2-4d86-a14f-7e363b6a9a28/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-21 01:47:06,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed9f16b-1fe2-4d86-a14f-7e363b6a9a28/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-21 01:47:06,952 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:47:06,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:47:06,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1534569752, now seen corresponding path program 1 times [2021-11-21 01:47:06,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:47:06,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556480609] [2021-11-21 01:47:06,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:47:06,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:47:07,001 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:47:07,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [606925398] [2021-11-21 01:47:07,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:47:07,002 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:47:07,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed9f16b-1fe2-4d86-a14f-7e363b6a9a28/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:47:07,003 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed9f16b-1fe2-4d86-a14f-7e363b6a9a28/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:47:07,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed9f16b-1fe2-4d86-a14f-7e363b6a9a28/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-21 01:47:07,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:47:07,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 2599 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 01:47:07,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:47:07,730 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-21 01:47:07,730 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:47:07,731 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:47:07,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556480609] [2021-11-21 01:47:07,731 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:47:07,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606925398] [2021-11-21 01:47:07,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606925398] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:47:07,731 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:47:07,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:47:07,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717722481] [2021-11-21 01:47:07,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:47:07,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:47:07,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:47:07,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:47:07,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:47:07,733 INFO L87 Difference]: Start difference. First operand 311 states and 414 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 2 states have call predecessors, (27), 1 states have call successors, (27) [2021-11-21 01:47:08,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:47:08,753 INFO L93 Difference]: Finished difference Result 497 states and 657 transitions. [2021-11-21 01:47:08,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:47:08,754 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 2 states have call predecessors, (27), 1 states have call successors, (27) Word has length 134 [2021-11-21 01:47:08,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:47:08,757 INFO L225 Difference]: With dead ends: 497 [2021-11-21 01:47:08,757 INFO L226 Difference]: Without dead ends: 312 [2021-11-21 01:47:08,758 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:47:08,758 INFO L933 BasicCegarLoop]: 334 mSDtfsCounter, 0 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 664 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:47:08,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 664 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-21 01:47:08,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-11-21 01:47:08,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 312. [2021-11-21 01:47:08,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 188 states have (on average 1.2180851063829787) internal successors, (229), 191 states have internal predecessors, (229), 87 states have call successors, (87), 33 states have call predecessors, (87), 36 states have return successors, (99), 87 states have call predecessors, (99), 86 states have call successors, (99) [2021-11-21 01:47:08,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 415 transitions. [2021-11-21 01:47:08,777 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 415 transitions. Word has length 134 [2021-11-21 01:47:08,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:47:08,778 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 415 transitions. [2021-11-21 01:47:08,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 2 states have call predecessors, (27), 1 states have call successors, (27) [2021-11-21 01:47:08,779 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 415 transitions. [2021-11-21 01:47:08,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-21 01:47:08,781 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:47:08,781 INFO L514 BasicCegarLoop]: trace histogram [9, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:47:08,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed9f16b-1fe2-4d86-a14f-7e363b6a9a28/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-21 01:47:08,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed9f16b-1fe2-4d86-a14f-7e363b6a9a28/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:47:08,990 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:47:08,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:47:08,990 INFO L85 PathProgramCache]: Analyzing trace with hash -13102284, now seen corresponding path program 1 times [2021-11-21 01:47:08,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:47:08,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742684620] [2021-11-21 01:47:08,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:47:08,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:47:09,046 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:47:09,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1041588504] [2021-11-21 01:47:09,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:47:09,047 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:47:09,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed9f16b-1fe2-4d86-a14f-7e363b6a9a28/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:47:09,048 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed9f16b-1fe2-4d86-a14f-7e363b6a9a28/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:47:09,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed9f16b-1fe2-4d86-a14f-7e363b6a9a28/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-21 01:47:09,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:47:09,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 2649 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 01:47:09,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:47:09,853 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-21 01:47:09,853 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:47:09,853 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:47:09,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742684620] [2021-11-21 01:47:09,854 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:47:09,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041588504] [2021-11-21 01:47:09,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041588504] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:47:09,854 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:47:09,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-21 01:47:09,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084001738] [2021-11-21 01:47:09,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:47:09,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:47:09,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:47:09,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:47:09,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:47:09,856 INFO L87 Difference]: Start difference. First operand 312 states and 415 transitions. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 5 states have internal predecessors, (64), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 2 states have call predecessors, (27), 1 states have call successors, (27) [2021-11-21 01:47:11,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:47:11,732 INFO L93 Difference]: Finished difference Result 413 states and 556 transitions. [2021-11-21 01:47:11,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:47:11,733 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 5 states have internal predecessors, (64), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 2 states have call predecessors, (27), 1 states have call successors, (27) Word has length 137 [2021-11-21 01:47:11,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:47:11,736 INFO L225 Difference]: With dead ends: 413 [2021-11-21 01:47:11,736 INFO L226 Difference]: Without dead ends: 365 [2021-11-21 01:47:11,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:47:11,737 INFO L933 BasicCegarLoop]: 391 mSDtfsCounter, 49 mSDsluCounter, 1685 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 1899 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-21 01:47:11,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 1899 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-21 01:47:11,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-11-21 01:47:11,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 313. [2021-11-21 01:47:11,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 189 states have (on average 1.216931216931217) internal successors, (230), 192 states have internal predecessors, (230), 87 states have call successors, (87), 33 states have call predecessors, (87), 36 states have return successors, (99), 87 states have call predecessors, (99), 86 states have call successors, (99) [2021-11-21 01:47:11,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 416 transitions. [2021-11-21 01:47:11,758 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 416 transitions. Word has length 137 [2021-11-21 01:47:11,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:47:11,758 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 416 transitions. [2021-11-21 01:47:11,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 5 states have internal predecessors, (64), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 2 states have call predecessors, (27), 1 states have call successors, (27) [2021-11-21 01:47:11,759 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 416 transitions. [2021-11-21 01:47:11,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-21 01:47:11,761 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:47:11,761 INFO L514 BasicCegarLoop]: trace histogram [10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:47:11,802 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed9f16b-1fe2-4d86-a14f-7e363b6a9a28/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-21 01:47:11,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed9f16b-1fe2-4d86-a14f-7e363b6a9a28/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:47:11,990 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:47:11,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:47:11,990 INFO L85 PathProgramCache]: Analyzing trace with hash 2030439503, now seen corresponding path program 1 times [2021-11-21 01:47:11,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:47:11,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048861945] [2021-11-21 01:47:11,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:47:11,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:47:12,047 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:47:12,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1979355922] [2021-11-21 01:47:12,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:47:12,048 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:47:12,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed9f16b-1fe2-4d86-a14f-7e363b6a9a28/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:47:12,049 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed9f16b-1fe2-4d86-a14f-7e363b6a9a28/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:47:12,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed9f16b-1fe2-4d86-a14f-7e363b6a9a28/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-21 01:47:12,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:47:12,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 2682 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-21 01:47:12,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:47:12,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-21 01:47:12,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-21 01:47:13,035 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 26 proven. 2 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-21 01:47:13,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:47:13,720 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-11-21 01:47:13,721 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:47:13,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048861945] [2021-11-21 01:47:13,721 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:47:13,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979355922] [2021-11-21 01:47:13,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979355922] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:47:13,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [580337730] [2021-11-21 01:47:13,744 INFO L159 IcfgInterpreter]: Started Sifa with 108 locations of interest [2021-11-21 01:47:13,745 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:47:13,752 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:47:13,758 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:47:13,758 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:47:18,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:18,567 INFO L244 Elim1Store]: Index analysis took 421 ms [2021-11-21 01:47:50,621 WARN L227 SmtUtils]: Spent 31.97s on a formula simplification. DAG size of input: 2161 DAG size of output: 1179 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-21 01:47:50,643 INFO L354 Elim1Store]: treesize reduction 3528, result has 33.3 percent of original size [2021-11-21 01:47:50,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 199 select indices, 199 select index equivalence classes, 19505 disjoint index pairs (out of 19701 index pairs), introduced 199 new quantified variables, introduced 392 case distinctions, treesize of input 1002 treesize of output 2377 [2021-11-21 01:48:24,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:48:24,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 197 select indices, 197 select index equivalence classes, 19503 disjoint index pairs (out of 19306 index pairs), introduced 197 new quantified variables, introduced 0 case distinctions, treesize of input 992 treesize of output 1582