./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_hash_table_create_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_f84018b7-2e51-4e85-a7a5-1fa0c1e4b489/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84018b7-2e51-4e85-a7a5-1fa0c1e4b489/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_f84018b7-2e51-4e85-a7a5-1fa0c1e4b489/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84018b7-2e51-4e85-a7a5-1fa0c1e4b489/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_hash_table_create_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84018b7-2e51-4e85-a7a5-1fa0c1e4b489/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_f84018b7-2e51-4e85-a7a5-1fa0c1e4b489/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 a871e941a14cf19147765419aa3746af2f9add859ed1f61f31f704f97208fdb0 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:57:36,091 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:57:36,093 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:57:36,148 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:57:36,149 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:57:36,153 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:57:36,155 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:57:36,159 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:57:36,163 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:57:36,171 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:57:36,173 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:57:36,175 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:57:36,176 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:57:36,178 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:57:36,181 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:57:36,186 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:57:36,188 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:57:36,189 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:57:36,192 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:57:36,203 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:57:36,205 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:57:36,206 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:57:36,210 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:57:36,211 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:57:36,221 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:57:36,221 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:57:36,222 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:57:36,224 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:57:36,225 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:57:36,227 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:57:36,227 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:57:36,228 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:57:36,231 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:57:36,232 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:57:36,234 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:57:36,235 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:57:36,236 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:57:36,236 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:57:36,236 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:57:36,237 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:57:36,238 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:57:36,239 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84018b7-2e51-4e85-a7a5-1fa0c1e4b489/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-21 00:57:36,284 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:57:36,285 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:57:36,285 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:57:36,286 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:57:36,287 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:57:36,293 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:57:36,293 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:57:36,293 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:57:36,294 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:57:36,294 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 00:57:36,295 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:57:36,295 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:57:36,295 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 00:57:36,296 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 00:57:36,296 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:57:36,296 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 00:57:36,296 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 00:57:36,297 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 00:57:36,298 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:57:36,298 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 00:57:36,298 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:57:36,299 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 00:57:36,299 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:57:36,299 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 00:57:36,299 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 00:57:36,299 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:57:36,301 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 00:57:36,301 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:57:36,301 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:57:36,302 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:57:36,302 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:57:36,302 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:57:36,303 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 00:57:36,303 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 00:57:36,303 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 00:57:36,303 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 00:57:36,303 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:57:36,304 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:57:36,304 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_f84018b7-2e51-4e85-a7a5-1fa0c1e4b489/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84018b7-2e51-4e85-a7a5-1fa0c1e4b489/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a871e941a14cf19147765419aa3746af2f9add859ed1f61f31f704f97208fdb0 [2021-11-21 00:57:36,567 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:57:36,604 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:57:36,607 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:57:36,608 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:57:36,609 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:57:36,611 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84018b7-2e51-4e85-a7a5-1fa0c1e4b489/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/aws-c-common/aws_hash_table_create_harness.i [2021-11-21 00:57:36,685 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84018b7-2e51-4e85-a7a5-1fa0c1e4b489/bin/utaipan-TEXQjIfE4P/data/283b65ed3/40224248471942828c7593d64027b823/FLAGda41ff6ca [2021-11-21 00:57:37,621 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:57:37,625 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84018b7-2e51-4e85-a7a5-1fa0c1e4b489/sv-benchmarks/c/aws-c-common/aws_hash_table_create_harness.i [2021-11-21 00:57:37,672 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84018b7-2e51-4e85-a7a5-1fa0c1e4b489/bin/utaipan-TEXQjIfE4P/data/283b65ed3/40224248471942828c7593d64027b823/FLAGda41ff6ca [2021-11-21 00:57:38,057 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84018b7-2e51-4e85-a7a5-1fa0c1e4b489/bin/utaipan-TEXQjIfE4P/data/283b65ed3/40224248471942828c7593d64027b823 [2021-11-21 00:57:38,059 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:57:38,060 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:57:38,063 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:57:38,063 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:57:38,066 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:57:38,067 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:57:38" (1/1) ... [2021-11-21 00:57:38,068 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18fc007c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:57:38, skipping insertion in model container [2021-11-21 00:57:38,069 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:57:38" (1/1) ... [2021-11-21 00:57:38,076 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:57:38,211 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:57:38,561 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_f84018b7-2e51-4e85-a7a5-1fa0c1e4b489/sv-benchmarks/c/aws-c-common/aws_hash_table_create_harness.i[4495,4508] [2021-11-21 00:57:38,569 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_f84018b7-2e51-4e85-a7a5-1fa0c1e4b489/sv-benchmarks/c/aws-c-common/aws_hash_table_create_harness.i[4555,4568] [2021-11-21 00:57:39,820 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:57:39,821 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:57:39,822 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:57:39,823 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:57:39,824 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:57:39,840 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:57:39,841 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:57:39,844 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:57:39,845 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:57:39,847 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:57:39,848 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:57:39,850 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:57:39,850 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:57:40,361 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-21 00:57:40,363 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-21 00:57:40,364 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-21 00:57:40,366 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-21 00:57:40,368 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-21 00:57:40,369 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-21 00:57:40,370 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-21 00:57:40,371 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-21 00:57:40,372 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-21 00:57:40,373 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-21 00:57:40,608 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-21 00:57:41,022 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:57:41,023 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:57:41,046 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:57:41,047 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:57:41,053 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:57:41,054 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:57:41,069 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:57:41,070 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:57:41,071 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:57:41,072 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:57:41,072 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:57:41,073 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:57:41,073 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:57:41,110 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:57:41,140 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:57:41,169 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_f84018b7-2e51-4e85-a7a5-1fa0c1e4b489/sv-benchmarks/c/aws-c-common/aws_hash_table_create_harness.i[4495,4508] [2021-11-21 00:57:41,169 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_f84018b7-2e51-4e85-a7a5-1fa0c1e4b489/sv-benchmarks/c/aws-c-common/aws_hash_table_create_harness.i[4555,4568] [2021-11-21 00:57:41,235 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:57:41,235 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:57:41,236 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:57:41,237 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:57:41,238 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:57:41,252 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:57:41,252 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:57:41,254 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:57:41,255 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:57:41,257 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:57:41,258 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:57:41,259 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:57:41,259 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:57:41,313 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-21 00:57:41,314 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-21 00:57:41,359 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-21 00:57:41,361 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-21 00:57:41,372 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-21 00:57:41,373 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-21 00:57:41,373 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-21 00:57:41,377 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-21 00:57:41,378 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-21 00:57:41,378 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-21 00:57:41,433 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-21 00:57:41,600 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:57:41,601 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:57:41,610 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:57:41,611 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:57:41,614 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:57:41,615 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:57:41,625 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:57:41,626 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:57:41,627 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:57:41,627 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:57:41,628 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:57:41,628 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:57:41,628 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:57:41,656 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:57:41,967 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:57:41,968 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:57:41 WrapperNode [2021-11-21 00:57:41,968 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:57:41,969 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:57:41,969 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:57:41,970 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:57:41,978 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:57:41" (1/1) ... [2021-11-21 00:57:42,098 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:57:41" (1/1) ... [2021-11-21 00:57:42,196 INFO L137 Inliner]: procedures = 775, calls = 2489, calls flagged for inlining = 67, calls inlined = 21, statements flattened = 1294 [2021-11-21 00:57:42,197 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:57:42,198 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:57:42,198 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:57:42,198 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:57:42,217 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:57:41" (1/1) ... [2021-11-21 00:57:42,217 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:57:41" (1/1) ... [2021-11-21 00:57:42,230 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:57:41" (1/1) ... [2021-11-21 00:57:42,231 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:57:41" (1/1) ... [2021-11-21 00:57:42,291 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:57:41" (1/1) ... [2021-11-21 00:57:42,307 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:57:41" (1/1) ... [2021-11-21 00:57:42,336 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:57:41" (1/1) ... [2021-11-21 00:57:42,373 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:57:42,374 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:57:42,375 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:57:42,376 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:57:42,377 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:57:41" (1/1) ... [2021-11-21 00:57:42,402 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:57:42,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84018b7-2e51-4e85-a7a5-1fa0c1e4b489/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:57:42,432 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84018b7-2e51-4e85-a7a5-1fa0c1e4b489/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:57:42,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84018b7-2e51-4e85-a7a5-1fa0c1e4b489/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:57:42,482 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2021-11-21 00:57:42,482 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-11-21 00:57:42,483 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-11-21 00:57:42,483 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 00:57:42,483 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2021-11-21 00:57:42,483 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2021-11-21 00:57:42,483 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-21 00:57:42,484 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-21 00:57:42,484 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_table_create [2021-11-21 00:57:42,484 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_table_create [2021-11-21 00:57:42,484 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_is_valid [2021-11-21 00:57:42,484 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_is_valid [2021-11-21 00:57:42,485 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-21 00:57:42,485 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 00:57:42,485 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-21 00:57:42,485 INFO L130 BoogieDeclarations]: Found specification of procedure s_emplace_item [2021-11-21 00:57:42,485 INFO L138 BoogieDeclarations]: Found implementation of procedure s_emplace_item [2021-11-21 00:57:42,486 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:57:42,486 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:57:42,486 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-21 00:57:42,486 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-21 00:57:42,486 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2021-11-21 00:57:42,487 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2021-11-21 00:57:42,487 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_release [2021-11-21 00:57:42,487 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_release [2021-11-21 00:57:42,487 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 00:57:42,487 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_plus [2021-11-21 00:57:42,487 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_plus [2021-11-21 00:57:42,488 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-21 00:57:42,488 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-11-21 00:57:42,488 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-11-21 00:57:42,489 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 00:57:42,489 INFO L130 BoogieDeclarations]: Found specification of procedure s_hash_for [2021-11-21 00:57:42,489 INFO L138 BoogieDeclarations]: Found implementation of procedure s_hash_for [2021-11-21 00:57:42,490 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_power_of_two [2021-11-21 00:57:42,490 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_power_of_two [2021-11-21 00:57:42,493 INFO L130 BoogieDeclarations]: Found specification of procedure s_update_template_size [2021-11-21 00:57:42,493 INFO L138 BoogieDeclarations]: Found implementation of procedure s_update_template_size [2021-11-21 00:57:42,493 INFO L130 BoogieDeclarations]: Found specification of procedure s_hash_keys_eq [2021-11-21 00:57:42,494 INFO L138 BoogieDeclarations]: Found implementation of procedure s_hash_keys_eq [2021-11-21 00:57:42,494 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_uninterpreted_equals [2021-11-21 00:57:42,495 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_uninterpreted_equals [2021-11-21 00:57:42,495 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 00:57:42,495 INFO L130 BoogieDeclarations]: Found specification of procedure aws_allocator_is_valid [2021-11-21 00:57:42,495 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_allocator_is_valid [2021-11-21 00:57:42,502 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real [2021-11-21 00:57:42,502 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_calloc [2021-11-21 00:57:42,502 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_calloc [2021-11-21 00:57:42,502 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-11-21 00:57:42,503 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_required_bytes [2021-11-21 00:57:42,503 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_required_bytes [2021-11-21 00:57:42,503 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_uninterpreted_hasher [2021-11-21 00:57:42,503 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_uninterpreted_hasher [2021-11-21 00:57:42,503 INFO L130 BoogieDeclarations]: Found specification of procedure s_safe_eq_check [2021-11-21 00:57:42,503 INFO L138 BoogieDeclarations]: Found implementation of procedure s_safe_eq_check [2021-11-21 00:57:42,503 INFO L130 BoogieDeclarations]: Found specification of procedure s_find_entry [2021-11-21 00:57:42,504 INFO L138 BoogieDeclarations]: Found implementation of procedure s_find_entry [2021-11-21 00:57:42,504 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-21 00:57:42,504 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-21 00:57:42,504 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_table_is_valid [2021-11-21 00:57:42,505 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_table_is_valid [2021-11-21 00:57:42,505 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-21 00:57:42,505 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-11-21 00:57:42,505 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-11-21 00:57:42,505 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2021-11-21 00:57:42,505 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2021-11-21 00:57:42,506 INFO L130 BoogieDeclarations]: Found specification of procedure aws_add_size_checked [2021-11-21 00:57:42,506 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_add_size_checked [2021-11-21 00:57:42,506 INFO L130 BoogieDeclarations]: Found specification of procedure s_alloc_state [2021-11-21 00:57:42,506 INFO L138 BoogieDeclarations]: Found implementation of procedure s_alloc_state [2021-11-21 00:57:42,506 INFO L130 BoogieDeclarations]: Found specification of procedure uninterpreted_equals [2021-11-21 00:57:42,506 INFO L138 BoogieDeclarations]: Found implementation of procedure uninterpreted_equals [2021-11-21 00:57:42,506 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-21 00:57:42,507 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-21 00:57:42,507 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 00:57:42,976 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:57:42,978 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:57:43,233 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##5: assume !true; [2021-11-21 00:57:43,289 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume !true; [2021-11-21 00:57:44,428 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##7: assume !true; [2021-11-21 00:57:44,428 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##29: assume !true; [2021-11-21 00:57:45,346 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:57:45,644 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:57:45,644 INFO L301 CfgBuilder]: Removed 11 assume(true) statements. [2021-11-21 00:57:45,650 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:57:45 BoogieIcfgContainer [2021-11-21 00:57:45,651 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:57:45,653 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:57:45,653 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:57:45,657 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:57:45,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:57:38" (1/3) ... [2021-11-21 00:57:45,659 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38072495 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:57:45, skipping insertion in model container [2021-11-21 00:57:45,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:57:41" (2/3) ... [2021-11-21 00:57:45,659 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38072495 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:57:45, skipping insertion in model container [2021-11-21 00:57:45,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:57:45" (3/3) ... [2021-11-21 00:57:45,661 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_hash_table_create_harness.i [2021-11-21 00:57:45,668 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:57:45,668 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 00:57:45,738 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:57:45,755 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 00:57:45,756 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 00:57:45,789 INFO L276 IsEmpty]: Start isEmpty. Operand has 281 states, 167 states have (on average 1.251497005988024) internal successors, (209), 164 states have internal predecessors, (209), 86 states have call successors, (86), 30 states have call predecessors, (86), 30 states have return successors, (86), 86 states have call predecessors, (86), 86 states have call successors, (86) [2021-11-21 00:57:45,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-21 00:57:45,801 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:57:45,802 INFO L514 BasicCegarLoop]: trace histogram [9, 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] [2021-11-21 00:57:45,803 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:57:45,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:57:45,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1755351517, now seen corresponding path program 1 times [2021-11-21 00:57:45,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:57:45,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530745226] [2021-11-21 00:57:45,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:57:45,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:57:46,213 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:57:46,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [262285723] [2021-11-21 00:57:46,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:57:46,217 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:57:46,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84018b7-2e51-4e85-a7a5-1fa0c1e4b489/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:57:46,220 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84018b7-2e51-4e85-a7a5-1fa0c1e4b489/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:57:46,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84018b7-2e51-4e85-a7a5-1fa0c1e4b489/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 00:57:46,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:57:46,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 2274 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 00:57:46,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:57:47,271 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-21 00:57:47,271 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:57:47,272 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:57:47,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530745226] [2021-11-21 00:57:47,273 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:57:47,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262285723] [2021-11-21 00:57:47,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262285723] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:57:47,274 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:57:47,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:57:47,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465197940] [2021-11-21 00:57:47,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:57:47,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:57:47,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:57:47,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:57:47,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:57:47,323 INFO L87 Difference]: Start difference. First operand has 281 states, 167 states have (on average 1.251497005988024) internal successors, (209), 164 states have internal predecessors, (209), 86 states have call successors, (86), 30 states have call predecessors, (86), 30 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 10.25) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-21 00:57:49,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:57:49,593 INFO L93 Difference]: Finished difference Result 558 states and 783 transitions. [2021-11-21 00:57:49,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:57:49,596 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 10.25) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) Word has length 89 [2021-11-21 00:57:49,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:57:49,613 INFO L225 Difference]: With dead ends: 558 [2021-11-21 00:57:49,613 INFO L226 Difference]: Without dead ends: 281 [2021-11-21 00:57:49,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 85 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 00:57:49,627 INFO L933 BasicCegarLoop]: 328 mSDtfsCounter, 1 mSDsluCounter, 1106 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 1308 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:57:49,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 1308 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-21 00:57:49,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-11-21 00:57:49,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 281. [2021-11-21 00:57:49,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 163 states have (on average 1.2269938650306749) internal successors, (200), 165 states have internal predecessors, (200), 86 states have call successors, (86), 30 states have call predecessors, (86), 31 states have return successors, (88), 85 states have call predecessors, (88), 84 states have call successors, (88) [2021-11-21 00:57:49,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 374 transitions. [2021-11-21 00:57:49,706 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 374 transitions. Word has length 89 [2021-11-21 00:57:49,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:57:49,707 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 374 transitions. [2021-11-21 00:57:49,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 10.25) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-21 00:57:49,708 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 374 transitions. [2021-11-21 00:57:49,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-21 00:57:49,713 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:57:49,713 INFO L514 BasicCegarLoop]: trace histogram [9, 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 00:57:49,756 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84018b7-2e51-4e85-a7a5-1fa0c1e4b489/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-21 00:57:49,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84018b7-2e51-4e85-a7a5-1fa0c1e4b489/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-21 00:57:49,939 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:57:49,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:57:49,940 INFO L85 PathProgramCache]: Analyzing trace with hash 670226085, now seen corresponding path program 1 times [2021-11-21 00:57:49,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:57:49,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397455989] [2021-11-21 00:57:49,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:57:49,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:57:50,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:57:50,523 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-21 00:57:50,523 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:57:50,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397455989] [2021-11-21 00:57:50,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397455989] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:57:50,526 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:57:50,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-21 00:57:50,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100939201] [2021-11-21 00:57:50,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:57:50,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 00:57:50,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:57:50,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 00:57:50,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:57:50,529 INFO L87 Difference]: Start difference. First operand 281 states and 374 transitions. Second operand has 8 states, 6 states have (on average 6.833333333333333) internal successors, (41), 7 states have internal predecessors, (41), 4 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2021-11-21 00:57:54,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:57:54,561 INFO L93 Difference]: Finished difference Result 546 states and 725 transitions. [2021-11-21 00:57:54,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 00:57:54,561 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 6.833333333333333) internal successors, (41), 7 states have internal predecessors, (41), 4 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) Word has length 93 [2021-11-21 00:57:54,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:57:54,566 INFO L225 Difference]: With dead ends: 546 [2021-11-21 00:57:54,566 INFO L226 Difference]: Without dead ends: 283 [2021-11-21 00:57:54,577 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 00:57:54,578 INFO L933 BasicCegarLoop]: 318 mSDtfsCounter, 16 mSDsluCounter, 1634 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 1784 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:57:54,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 1784 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2021-11-21 00:57:54,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-11-21 00:57:54,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 283. [2021-11-21 00:57:54,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 164 states have (on average 1.225609756097561) internal successors, (201), 167 states have internal predecessors, (201), 86 states have call successors, (86), 30 states have call predecessors, (86), 32 states have return successors, (89), 85 states have call predecessors, (89), 84 states have call successors, (89) [2021-11-21 00:57:54,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 376 transitions. [2021-11-21 00:57:54,625 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 376 transitions. Word has length 93 [2021-11-21 00:57:54,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:57:54,627 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 376 transitions. [2021-11-21 00:57:54,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 6.833333333333333) internal successors, (41), 7 states have internal predecessors, (41), 4 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2021-11-21 00:57:54,628 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 376 transitions. [2021-11-21 00:57:54,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-21 00:57:54,638 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:57:54,638 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] [2021-11-21 00:57:54,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 00:57:54,639 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:57:54,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:57:54,640 INFO L85 PathProgramCache]: Analyzing trace with hash 827076953, now seen corresponding path program 1 times [2021-11-21 00:57:54,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:57:54,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407802569] [2021-11-21 00:57:54,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:57:54,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:57:54,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:57:55,119 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-21 00:57:55,119 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:57:55,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407802569] [2021-11-21 00:57:55,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407802569] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:57:55,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715740011] [2021-11-21 00:57:55,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:57:55,120 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:57:55,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84018b7-2e51-4e85-a7a5-1fa0c1e4b489/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:57:55,122 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84018b7-2e51-4e85-a7a5-1fa0c1e4b489/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:57:55,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84018b7-2e51-4e85-a7a5-1fa0c1e4b489/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 00:57:55,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:57:55,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 2313 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-21 00:57:55,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:57:56,001 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 00:57:56,475 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-21 00:57:56,475 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:57:56,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715740011] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:57:56,476 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:57:56,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [8] total 18 [2021-11-21 00:57:56,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121270652] [2021-11-21 00:57:56,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:57:56,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-21 00:57:56,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:57:56,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-21 00:57:56,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-11-21 00:57:56,478 INFO L87 Difference]: Start difference. First operand 283 states and 376 transitions. Second operand has 12 states, 9 states have (on average 5.222222222222222) internal successors, (47), 10 states have internal predecessors, (47), 5 states have call successors, (24), 3 states have call predecessors, (24), 5 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2021-11-21 00:57:58,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:57:58,629 INFO L93 Difference]: Finished difference Result 559 states and 740 transitions. [2021-11-21 00:57:58,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-21 00:57:58,630 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 5.222222222222222) internal successors, (47), 10 states have internal predecessors, (47), 5 states have call successors, (24), 3 states have call predecessors, (24), 5 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) Word has length 99 [2021-11-21 00:57:58,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:57:58,633 INFO L225 Difference]: With dead ends: 559 [2021-11-21 00:57:58,634 INFO L226 Difference]: Without dead ends: 288 [2021-11-21 00:57:58,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-11-21 00:57:58,647 INFO L933 BasicCegarLoop]: 318 mSDtfsCounter, 20 mSDsluCounter, 1352 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 1536 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:57:58,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 1536 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 186 Invalid, 0 Unknown, 83 Unchecked, 2.1s Time] [2021-11-21 00:57:58,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-11-21 00:57:58,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 288. [2021-11-21 00:57:58,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 168 states have (on average 1.2202380952380953) internal successors, (205), 170 states have internal predecessors, (205), 87 states have call successors, (87), 32 states have call predecessors, (87), 32 states have return successors, (90), 85 states have call predecessors, (90), 85 states have call successors, (90) [2021-11-21 00:57:58,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 382 transitions. [2021-11-21 00:57:58,678 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 382 transitions. Word has length 99 [2021-11-21 00:57:58,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:57:58,679 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 382 transitions. [2021-11-21 00:57:58,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 5.222222222222222) internal successors, (47), 10 states have internal predecessors, (47), 5 states have call successors, (24), 3 states have call predecessors, (24), 5 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2021-11-21 00:57:58,679 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 382 transitions. [2021-11-21 00:57:58,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-21 00:57:58,681 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:57:58,681 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] [2021-11-21 00:57:58,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84018b7-2e51-4e85-a7a5-1fa0c1e4b489/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 00:57:58,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84018b7-2e51-4e85-a7a5-1fa0c1e4b489/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:57:58,907 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:57:58,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:57:58,908 INFO L85 PathProgramCache]: Analyzing trace with hash -2005035473, now seen corresponding path program 1 times [2021-11-21 00:57:58,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:57:58,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655649357] [2021-11-21 00:57:58,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:57:58,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:57:59,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:57:59,249 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-21 00:57:59,249 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:57:59,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655649357] [2021-11-21 00:57:59,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655649357] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:57:59,250 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:57:59,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:57:59,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896312625] [2021-11-21 00:57:59,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:57:59,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:57:59,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:57:59,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:57:59,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:57:59,252 INFO L87 Difference]: Start difference. First operand 288 states and 382 transitions. Second operand has 5 states, 3 states have (on average 15.333333333333334) internal successors, (46), 4 states have internal predecessors, (46), 3 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (22), 3 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-21 00:58:01,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:58:01,681 INFO L93 Difference]: Finished difference Result 536 states and 715 transitions. [2021-11-21 00:58:01,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:58:01,681 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 15.333333333333334) internal successors, (46), 4 states have internal predecessors, (46), 3 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (22), 3 states have call predecessors, (22), 2 states have call successors, (22) Word has length 103 [2021-11-21 00:58:01,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:58:01,684 INFO L225 Difference]: With dead ends: 536 [2021-11-21 00:58:01,684 INFO L226 Difference]: Without dead ends: 290 [2021-11-21 00:58:01,686 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 00:58:01,687 INFO L933 BasicCegarLoop]: 307 mSDtfsCounter, 0 mSDsluCounter, 1022 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1205 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:58:01,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1205 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-11-21 00:58:01,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-11-21 00:58:01,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 290. [2021-11-21 00:58:01,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 169 states have (on average 1.2189349112426036) internal successors, (206), 172 states have internal predecessors, (206), 87 states have call successors, (87), 32 states have call predecessors, (87), 33 states have return successors, (96), 85 states have call predecessors, (96), 85 states have call successors, (96) [2021-11-21 00:58:01,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 389 transitions. [2021-11-21 00:58:01,718 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 389 transitions. Word has length 103 [2021-11-21 00:58:01,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:58:01,719 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 389 transitions. [2021-11-21 00:58:01,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 15.333333333333334) internal successors, (46), 4 states have internal predecessors, (46), 3 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (22), 3 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-21 00:58:01,720 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 389 transitions. [2021-11-21 00:58:01,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-21 00:58:01,721 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:58:01,721 INFO L514 BasicCegarLoop]: trace histogram [9, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:58:01,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-21 00:58:01,722 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:58:01,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:58:01,723 INFO L85 PathProgramCache]: Analyzing trace with hash -307889915, now seen corresponding path program 1 times [2021-11-21 00:58:01,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:58:01,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252475739] [2021-11-21 00:58:01,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:58:01,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:58:01,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:58:02,062 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-21 00:58:02,063 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:58:02,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252475739] [2021-11-21 00:58:02,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252475739] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:58:02,063 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:58:02,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:58:02,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159091211] [2021-11-21 00:58:02,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:58:02,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:58:02,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:58:02,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:58:02,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:58:02,065 INFO L87 Difference]: Start difference. First operand 290 states and 389 transitions. Second operand has 5 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) [2021-11-21 00:58:04,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:58:04,174 INFO L93 Difference]: Finished difference Result 298 states and 396 transitions. [2021-11-21 00:58:04,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:58:04,179 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) Word has length 107 [2021-11-21 00:58:04,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:58:04,183 INFO L225 Difference]: With dead ends: 298 [2021-11-21 00:58:04,183 INFO L226 Difference]: Without dead ends: 296 [2021-11-21 00:58:04,184 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 00:58:04,184 INFO L933 BasicCegarLoop]: 324 mSDtfsCounter, 8 mSDsluCounter, 1078 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 1277 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:58:04,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 1277 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-21 00:58:04,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-11-21 00:58:04,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 294. [2021-11-21 00:58:04,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 172 states have (on average 1.2151162790697674) internal successors, (209), 175 states have internal predecessors, (209), 87 states have call successors, (87), 33 states have call predecessors, (87), 34 states have return successors, (96), 85 states have call predecessors, (96), 85 states have call successors, (96) [2021-11-21 00:58:04,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 392 transitions. [2021-11-21 00:58:04,213 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 392 transitions. Word has length 107 [2021-11-21 00:58:04,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:58:04,214 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 392 transitions. [2021-11-21 00:58:04,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) [2021-11-21 00:58:04,215 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 392 transitions. [2021-11-21 00:58:04,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-21 00:58:04,217 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:58:04,217 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] [2021-11-21 00:58:04,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-21 00:58:04,218 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:58:04,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:58:04,219 INFO L85 PathProgramCache]: Analyzing trace with hash -660957093, now seen corresponding path program 1 times [2021-11-21 00:58:04,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:58:04,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901582060] [2021-11-21 00:58:04,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:58:04,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:58:04,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:58:04,936 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-11-21 00:58:04,936 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:58:04,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901582060] [2021-11-21 00:58:04,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901582060] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:58:04,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543127631] [2021-11-21 00:58:04,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:58:04,937 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:58:04,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84018b7-2e51-4e85-a7a5-1fa0c1e4b489/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:58:04,939 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84018b7-2e51-4e85-a7a5-1fa0c1e4b489/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:58:04,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84018b7-2e51-4e85-a7a5-1fa0c1e4b489/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 00:58:05,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:58:05,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 2399 conjuncts, 58 conjunts are in the unsatisfiable core [2021-11-21 00:58:05,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:58:05,951 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-21 00:58:05,952 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:58:05,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543127631] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:58:05,952 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:58:05,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 8 [2021-11-21 00:58:05,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476127235] [2021-11-21 00:58:05,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:58:05,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:58:05,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:58:05,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:58:05,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:58:05,955 INFO L87 Difference]: Start difference. First operand 294 states and 392 transitions. Second operand has 6 states, 5 states have (on average 10.2) internal successors, (51), 6 states have internal predecessors, (51), 4 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) [2021-11-21 00:58:08,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:58:08,863 INFO L93 Difference]: Finished difference Result 582 states and 774 transitions. [2021-11-21 00:58:08,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:58:08,863 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.2) internal successors, (51), 6 states have internal predecessors, (51), 4 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) Word has length 116 [2021-11-21 00:58:08,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:58:08,866 INFO L225 Difference]: With dead ends: 582 [2021-11-21 00:58:08,867 INFO L226 Difference]: Without dead ends: 296 [2021-11-21 00:58:08,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 114 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 00:58:08,869 INFO L933 BasicCegarLoop]: 300 mSDtfsCounter, 19 mSDsluCounter, 979 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 1165 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-21 00:58:08,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 1165 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-11-21 00:58:08,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-11-21 00:58:08,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 296. [2021-11-21 00:58:08,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 173 states have (on average 1.2138728323699421) internal successors, (210), 177 states have internal predecessors, (210), 87 states have call successors, (87), 33 states have call predecessors, (87), 35 states have return successors, (97), 85 states have call predecessors, (97), 85 states have call successors, (97) [2021-11-21 00:58:08,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 394 transitions. [2021-11-21 00:58:08,923 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 394 transitions. Word has length 116 [2021-11-21 00:58:08,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:58:08,923 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 394 transitions. [2021-11-21 00:58:08,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.2) internal successors, (51), 6 states have internal predecessors, (51), 4 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) [2021-11-21 00:58:08,924 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 394 transitions. [2021-11-21 00:58:08,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-21 00:58:08,926 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:58:08,926 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] [2021-11-21 00:58:08,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84018b7-2e51-4e85-a7a5-1fa0c1e4b489/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 00:58:09,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84018b7-2e51-4e85-a7a5-1fa0c1e4b489/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:58:09,147 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:58:09,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:58:09,148 INFO L85 PathProgramCache]: Analyzing trace with hash -629247859, now seen corresponding path program 1 times [2021-11-21 00:58:09,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:58:09,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417378036] [2021-11-21 00:58:09,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:58:09,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:58:09,213 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:58:09,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1315478351] [2021-11-21 00:58:09,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:58:09,214 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:58:09,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84018b7-2e51-4e85-a7a5-1fa0c1e4b489/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:58:09,215 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84018b7-2e51-4e85-a7a5-1fa0c1e4b489/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:58:09,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84018b7-2e51-4e85-a7a5-1fa0c1e4b489/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 00:58:09,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:58:09,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 2471 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-21 00:58:09,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:58:10,339 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-11-21 00:58:10,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:58:10,846 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-21 00:58:10,846 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:58:10,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417378036] [2021-11-21 00:58:10,846 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:58:10,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315478351] [2021-11-21 00:58:10,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315478351] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-21 00:58:10,847 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:58:10,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 13 [2021-11-21 00:58:10,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913420710] [2021-11-21 00:58:10,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:58:10,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:58:10,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:58:10,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:58:10,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-11-21 00:58:10,849 INFO L87 Difference]: Start difference. First operand 296 states and 394 transitions. Second operand has 5 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (25), 1 states have call predecessors, (25), 1 states have call successors, (25) [2021-11-21 00:58:14,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:58:14,007 INFO L93 Difference]: Finished difference Result 304 states and 401 transitions. [2021-11-21 00:58:14,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:58:14,008 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (25), 1 states have call predecessors, (25), 1 states have call successors, (25) Word has length 121 [2021-11-21 00:58:14,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:58:14,012 INFO L225 Difference]: With dead ends: 304 [2021-11-21 00:58:14,012 INFO L226 Difference]: Without dead ends: 302 [2021-11-21 00:58:14,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 229 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 00:58:14,014 INFO L933 BasicCegarLoop]: 326 mSDtfsCounter, 6 mSDsluCounter, 1081 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 1282 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:58:14,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 1282 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-11-21 00:58:14,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-11-21 00:58:14,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 300. [2021-11-21 00:58:14,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 176 states have (on average 1.2102272727272727) internal successors, (213), 180 states have internal predecessors, (213), 87 states have call successors, (87), 34 states have call predecessors, (87), 36 states have return successors, (97), 85 states have call predecessors, (97), 85 states have call successors, (97) [2021-11-21 00:58:14,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 397 transitions. [2021-11-21 00:58:14,040 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 397 transitions. Word has length 121 [2021-11-21 00:58:14,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:58:14,041 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 397 transitions. [2021-11-21 00:58:14,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (25), 1 states have call predecessors, (25), 1 states have call successors, (25) [2021-11-21 00:58:14,042 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 397 transitions. [2021-11-21 00:58:14,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-21 00:58:14,044 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:58:14,045 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, 1, 1, 1] [2021-11-21 00:58:14,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84018b7-2e51-4e85-a7a5-1fa0c1e4b489/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-21 00:58:14,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84018b7-2e51-4e85-a7a5-1fa0c1e4b489/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:58:14,270 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:58:14,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:58:14,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1963608419, now seen corresponding path program 1 times [2021-11-21 00:58:14,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:58:14,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79361808] [2021-11-21 00:58:14,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:58:14,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:58:14,358 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:58:14,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [867511387] [2021-11-21 00:58:14,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:58:14,361 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:58:14,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84018b7-2e51-4e85-a7a5-1fa0c1e4b489/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:58:14,362 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84018b7-2e51-4e85-a7a5-1fa0c1e4b489/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:58:14,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84018b7-2e51-4e85-a7a5-1fa0c1e4b489/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 00:58:14,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:58:14,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 2551 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 00:58:14,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:58:15,180 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-21 00:58:15,181 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:58:15,181 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:58:15,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79361808] [2021-11-21 00:58:15,181 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:58:15,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867511387] [2021-11-21 00:58:15,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867511387] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:58:15,182 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:58:15,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:58:15,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116316548] [2021-11-21 00:58:15,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:58:15,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:58:15,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:58:15,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:58:15,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:58:15,184 INFO L87 Difference]: Start difference. First operand 300 states and 397 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 3 states have call predecessors, (27), 2 states have call successors, (27) [2021-11-21 00:58:17,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:58:17,278 INFO L93 Difference]: Finished difference Result 392 states and 516 transitions. [2021-11-21 00:58:17,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:58:17,278 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 3 states have call predecessors, (27), 2 states have call successors, (27) Word has length 130 [2021-11-21 00:58:17,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:58:17,282 INFO L225 Difference]: With dead ends: 392 [2021-11-21 00:58:17,282 INFO L226 Difference]: Without dead ends: 332 [2021-11-21 00:58:17,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 126 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 00:58:17,284 INFO L933 BasicCegarLoop]: 337 mSDtfsCounter, 27 mSDsluCounter, 1120 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 1333 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:58:17,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 1333 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-21 00:58:17,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-11-21 00:58:17,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 304. [2021-11-21 00:58:17,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 179 states have (on average 1.2067039106145252) internal successors, (216), 183 states have internal predecessors, (216), 87 states have call successors, (87), 34 states have call predecessors, (87), 37 states have return successors, (98), 86 states have call predecessors, (98), 85 states have call successors, (98) [2021-11-21 00:58:17,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 401 transitions. [2021-11-21 00:58:17,308 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 401 transitions. Word has length 130 [2021-11-21 00:58:17,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:58:17,309 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 401 transitions. [2021-11-21 00:58:17,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 3 states have call predecessors, (27), 2 states have call successors, (27) [2021-11-21 00:58:17,310 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 401 transitions. [2021-11-21 00:58:17,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-21 00:58:17,312 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:58:17,313 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, 1, 1, 1, 1, 1] [2021-11-21 00:58:17,344 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84018b7-2e51-4e85-a7a5-1fa0c1e4b489/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-21 00:58:17,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84018b7-2e51-4e85-a7a5-1fa0c1e4b489/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:58:17,523 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:58:17,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:58:17,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1372037724, now seen corresponding path program 1 times [2021-11-21 00:58:17,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:58:17,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407314556] [2021-11-21 00:58:17,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:58:17,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:58:17,610 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:58:17,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [134373894] [2021-11-21 00:58:17,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:58:17,611 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:58:17,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84018b7-2e51-4e85-a7a5-1fa0c1e4b489/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:58:17,612 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84018b7-2e51-4e85-a7a5-1fa0c1e4b489/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:58:17,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84018b7-2e51-4e85-a7a5-1fa0c1e4b489/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-21 00:58:18,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:58:18,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 2555 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 00:58:18,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:58:18,514 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-21 00:58:18,514 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:58:18,514 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:58:18,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407314556] [2021-11-21 00:58:18,514 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:58:18,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134373894] [2021-11-21 00:58:18,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134373894] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:58:18,515 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:58:18,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:58:18,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060859827] [2021-11-21 00:58:18,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:58:18,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:58:18,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:58:18,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:58:18,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:58:18,519 INFO L87 Difference]: Start difference. First operand 304 states and 401 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2021-11-21 00:58:20,490 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:58:20,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:58:20,515 INFO L93 Difference]: Finished difference Result 500 states and 655 transitions. [2021-11-21 00:58:20,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:58:20,515 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) Word has length 132 [2021-11-21 00:58:20,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:58:20,519 INFO L225 Difference]: With dead ends: 500 [2021-11-21 00:58:20,519 INFO L226 Difference]: Without dead ends: 305 [2021-11-21 00:58:20,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 130 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 00:58:20,522 INFO L933 BasicCegarLoop]: 324 mSDtfsCounter, 0 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:58:20,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 644 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-21 00:58:20,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2021-11-21 00:58:20,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 305. [2021-11-21 00:58:20,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 180 states have (on average 1.2055555555555555) internal successors, (217), 184 states have internal predecessors, (217), 87 states have call successors, (87), 34 states have call predecessors, (87), 37 states have return successors, (98), 86 states have call predecessors, (98), 85 states have call successors, (98) [2021-11-21 00:58:20,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 402 transitions. [2021-11-21 00:58:20,545 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 402 transitions. Word has length 132 [2021-11-21 00:58:20,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:58:20,546 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 402 transitions. [2021-11-21 00:58:20,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2021-11-21 00:58:20,547 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 402 transitions. [2021-11-21 00:58:20,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-21 00:58:20,550 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:58:20,550 INFO L514 BasicCegarLoop]: trace histogram [10, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:58:20,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84018b7-2e51-4e85-a7a5-1fa0c1e4b489/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-21 00:58:20,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84018b7-2e51-4e85-a7a5-1fa0c1e4b489/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-21 00:58:20,767 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:58:20,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:58:20,768 INFO L85 PathProgramCache]: Analyzing trace with hash -94620496, now seen corresponding path program 1 times [2021-11-21 00:58:20,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:58:20,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650409972] [2021-11-21 00:58:20,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:58:20,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:58:20,819 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:58:20,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [750774755] [2021-11-21 00:58:20,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:58:20,820 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:58:20,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84018b7-2e51-4e85-a7a5-1fa0c1e4b489/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:58:20,821 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84018b7-2e51-4e85-a7a5-1fa0c1e4b489/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:58:20,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84018b7-2e51-4e85-a7a5-1fa0c1e4b489/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-21 00:58:21,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:58:21,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 2634 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-21 00:58:21,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:58:21,474 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 00:58:21,479 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 00:58:21,791 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 26 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-21 00:58:21,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:58:22,567 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-21 00:58:22,568 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:58:22,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650409972] [2021-11-21 00:58:22,568 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:58:22,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750774755] [2021-11-21 00:58:22,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750774755] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:58:22,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [522276627] [2021-11-21 00:58:22,595 INFO L159 IcfgInterpreter]: Started Sifa with 104 locations of interest [2021-11-21 00:58:22,596 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:58:22,601 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:58:22,606 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:58:22,607 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:58:28,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:58:28,959 INFO L244 Elim1Store]: Index analysis took 469 ms [2021-11-21 00:59:00,856 WARN L227 SmtUtils]: Spent 31.80s 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 00:59:00,872 INFO L354 Elim1Store]: treesize reduction 3528, result has 33.3 percent of original size [2021-11-21 00:59:00,877 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 00:59:34,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:34,230 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