./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913ee18e-975a-4a78-9212-ad2038ef8a32/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913ee18e-975a-4a78-9212-ad2038ef8a32/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913ee18e-975a-4a78-9212-ad2038ef8a32/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913ee18e-975a-4a78-9212-ad2038ef8a32/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913ee18e-975a-4a78-9212-ad2038ef8a32/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913ee18e-975a-4a78-9212-ad2038ef8a32/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash de3da06dbfc8734cb93dce42b312357899e8d9cc914b94ba94740650fa2d8258 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:06:57,097 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:06:57,100 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:06:57,158 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:06:57,159 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:06:57,163 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:06:57,166 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:06:57,170 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:06:57,175 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:06:57,184 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:06:57,185 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:06:57,187 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:06:57,188 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:06:57,190 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:06:57,193 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:06:57,195 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:06:57,197 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:06:57,198 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:06:57,200 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:06:57,203 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:06:57,205 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:06:57,206 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:06:57,208 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:06:57,209 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:06:57,215 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:06:57,220 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:06:57,221 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:06:57,222 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:06:57,223 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:06:57,225 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:06:57,225 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:06:57,226 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:06:57,228 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:06:57,230 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:06:57,232 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:06:57,233 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:06:57,234 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:06:57,234 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:06:57,234 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:06:57,235 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:06:57,236 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:06:57,237 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913ee18e-975a-4a78-9212-ad2038ef8a32/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 02:06:57,276 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:06:57,276 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:06:57,277 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:06:57,277 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:06:57,277 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:06:57,278 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:06:57,278 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:06:57,278 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:06:57,278 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:06:57,278 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:06:57,278 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:06:57,279 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:06:57,279 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:06:57,279 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:06:57,279 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:06:57,279 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:06:57,280 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:06:57,280 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:06:57,280 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:06:57,281 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:06:57,281 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:06:57,281 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:06:57,281 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:06:57,281 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:06:57,282 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:06:57,282 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:06:57,282 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:06:57,282 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:06:57,282 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:06:57,283 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:06:57,283 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:06:57,283 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:06:57,283 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:06:57,283 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:06:57,284 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:06:57,284 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:06:57,284 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:06:57,284 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:06:57,284 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913ee18e-975a-4a78-9212-ad2038ef8a32/bin/utaipan-7li7fVZpFI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913ee18e-975a-4a78-9212-ad2038ef8a32/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> de3da06dbfc8734cb93dce42b312357899e8d9cc914b94ba94740650fa2d8258 [2022-11-03 02:06:57,634 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:06:57,673 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:06:57,676 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:06:57,677 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:06:57,678 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:06:57,680 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913ee18e-975a-4a78-9212-ad2038ef8a32/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_harness.i [2022-11-03 02:06:57,756 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913ee18e-975a-4a78-9212-ad2038ef8a32/bin/utaipan-7li7fVZpFI/data/2f4bb1b0e/8a8362a2ddb1481e81466284e6c4fd60/FLAG412305dd1 [2022-11-03 02:06:58,563 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:06:58,563 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913ee18e-975a-4a78-9212-ad2038ef8a32/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_harness.i [2022-11-03 02:06:58,614 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913ee18e-975a-4a78-9212-ad2038ef8a32/bin/utaipan-7li7fVZpFI/data/2f4bb1b0e/8a8362a2ddb1481e81466284e6c4fd60/FLAG412305dd1 [2022-11-03 02:06:59,076 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913ee18e-975a-4a78-9212-ad2038ef8a32/bin/utaipan-7li7fVZpFI/data/2f4bb1b0e/8a8362a2ddb1481e81466284e6c4fd60 [2022-11-03 02:06:59,080 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:06:59,083 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:06:59,086 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:06:59,086 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:06:59,091 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:06:59,092 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:06:59" (1/1) ... [2022-11-03 02:06:59,095 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66d34fb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:06:59, skipping insertion in model container [2022-11-03 02:06:59,095 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:06:59" (1/1) ... [2022-11-03 02:06:59,119 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:06:59,253 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:06:59,541 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_913ee18e-975a-4a78-9212-ad2038ef8a32/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_harness.i[4494,4507] [2022-11-03 02:06:59,547 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_913ee18e-975a-4a78-9212-ad2038ef8a32/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_harness.i[4554,4567] [2022-11-03 02:07:00,505 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:07:00,515 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:07:00,518 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:07:00,519 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:07:00,521 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:07:00,549 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:07:00,550 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:07:00,556 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:07:00,557 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:07:00,995 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-03 02:07:00,997 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-03 02:07:00,998 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-03 02:07:01,000 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-03 02:07:01,002 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-03 02:07:01,003 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-03 02:07:01,004 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-03 02:07:01,005 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-03 02:07:01,006 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-03 02:07:01,007 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-03 02:07:01,240 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-03 02:07:01,333 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:07:01,333 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:07:01,487 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:07:01,489 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:07:01,588 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:07:01,664 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:07:01,682 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_913ee18e-975a-4a78-9212-ad2038ef8a32/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_harness.i[4494,4507] [2022-11-03 02:07:01,683 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_913ee18e-975a-4a78-9212-ad2038ef8a32/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_harness.i[4554,4567] [2022-11-03 02:07:01,735 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:07:01,736 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:07:01,736 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:07:01,738 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:07:01,738 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:07:01,753 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:07:01,754 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:07:01,755 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:07:01,755 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:07:01,808 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-03 02:07:01,809 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-03 02:07:01,810 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-03 02:07:01,811 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-03 02:07:01,812 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-03 02:07:01,812 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-03 02:07:01,813 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-03 02:07:01,822 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-03 02:07:01,823 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-03 02:07:01,825 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-03 02:07:01,853 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-03 02:07:01,876 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:07:01,877 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:07:01,937 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:07:01,937 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:07:02,046 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:07:02,329 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:07:02,330 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:02 WrapperNode [2022-11-03 02:07:02,330 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:07:02,331 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:07:02,331 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:07:02,332 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:07:02,339 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:02" (1/1) ... [2022-11-03 02:07:02,450 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:02" (1/1) ... [2022-11-03 02:07:02,558 INFO L138 Inliner]: procedures = 692, calls = 2621, calls flagged for inlining = 60, calls inlined = 10, statements flattened = 957 [2022-11-03 02:07:02,559 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:07:02,560 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:07:02,560 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:07:02,560 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:07:02,571 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:02" (1/1) ... [2022-11-03 02:07:02,571 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:02" (1/1) ... [2022-11-03 02:07:02,581 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:02" (1/1) ... [2022-11-03 02:07:02,581 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:02" (1/1) ... [2022-11-03 02:07:02,614 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:02" (1/1) ... [2022-11-03 02:07:02,619 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:02" (1/1) ... [2022-11-03 02:07:02,625 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:02" (1/1) ... [2022-11-03 02:07:02,630 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:02" (1/1) ... [2022-11-03 02:07:02,639 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:07:02,640 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:07:02,640 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:07:02,640 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:07:02,641 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:02" (1/1) ... [2022-11-03 02:07:02,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:07:02,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913ee18e-975a-4a78-9212-ad2038ef8a32/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:07:02,693 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913ee18e-975a-4a78-9212-ad2038ef8a32/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:07:02,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913ee18e-975a-4a78-9212-ad2038ef8a32/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:07:02,748 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2022-11-03 02:07:02,749 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2022-11-03 02:07:02,750 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 02:07:02,750 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2022-11-03 02:07:02,750 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2022-11-03 02:07:02,750 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 02:07:02,751 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2022-11-03 02:07:02,751 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2022-11-03 02:07:02,751 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-03 02:07:02,751 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-03 02:07:02,752 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 02:07:02,752 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:07:02,752 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 02:07:02,752 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:07:02,753 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:07:02,753 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2022-11-03 02:07:02,753 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2022-11-03 02:07:02,753 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_realloc [2022-11-03 02:07:02,754 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_realloc [2022-11-03 02:07:02,754 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_reserve [2022-11-03 02:07:02,755 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_reserve [2022-11-03 02:07:02,755 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_release [2022-11-03 02:07:02,755 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_release [2022-11-03 02:07:02,755 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-03 02:07:02,755 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-03 02:07:02,756 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 02:07:02,756 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 02:07:02,757 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-03 02:07:02,757 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2022-11-03 02:07:02,757 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2022-11-03 02:07:02,757 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-11-03 02:07:02,757 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-11-03 02:07:02,758 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 02:07:02,758 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:07:03,106 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:07:03,109 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:07:04,823 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:07:05,124 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:07:05,125 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-03 02:07:05,127 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:07:05 BoogieIcfgContainer [2022-11-03 02:07:05,128 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:07:05,131 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:07:05,132 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:07:05,135 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:07:05,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:06:59" (1/3) ... [2022-11-03 02:07:05,136 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68d0b73d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:07:05, skipping insertion in model container [2022-11-03 02:07:05,137 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:02" (2/3) ... [2022-11-03 02:07:05,137 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68d0b73d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:07:05, skipping insertion in model container [2022-11-03 02:07:05,138 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:07:05" (3/3) ... [2022-11-03 02:07:05,139 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_reserve_harness.i [2022-11-03 02:07:05,159 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:07:05,160 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:07:05,233 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:07:05,245 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@670cbf7c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:07:05,245 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:07:05,250 INFO L276 IsEmpty]: Start isEmpty. Operand has 116 states, 67 states have (on average 1.2537313432835822) internal successors, (84), 67 states have internal predecessors, (84), 37 states have call successors, (37), 11 states have call predecessors, (37), 11 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-11-03 02:07:05,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-03 02:07:05,260 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:05,261 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 02:07:05,262 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:07:05,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:05,273 INFO L85 PathProgramCache]: Analyzing trace with hash -355170412, now seen corresponding path program 1 times [2022-11-03 02:07:05,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:07:05,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933627554] [2022-11-03 02:07:05,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:05,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:07:05,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:06,046 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:07:06,047 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:07:06,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933627554] [2022-11-03 02:07:06,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933627554] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:06,054 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:07:06,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:07:06,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743631504] [2022-11-03 02:07:06,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:06,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-03 02:07:06,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:07:06,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-03 02:07:06,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 02:07:06,107 INFO L87 Difference]: Start difference. First operand has 116 states, 67 states have (on average 1.2537313432835822) internal successors, (84), 67 states have internal predecessors, (84), 37 states have call successors, (37), 11 states have call predecessors, (37), 11 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) Second operand has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-03 02:07:06,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:06,354 INFO L93 Difference]: Finished difference Result 215 states and 303 transitions. [2022-11-03 02:07:06,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-03 02:07:06,357 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 34 [2022-11-03 02:07:06,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:06,367 INFO L225 Difference]: With dead ends: 215 [2022-11-03 02:07:06,367 INFO L226 Difference]: Without dead ends: 112 [2022-11-03 02:07:06,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 02:07:06,374 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:06,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 138 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:07:06,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-11-03 02:07:06,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2022-11-03 02:07:06,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 63 states have (on average 1.1746031746031746) internal successors, (74), 64 states have internal predecessors, (74), 37 states have call successors, (37), 11 states have call predecessors, (37), 11 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-11-03 02:07:06,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 147 transitions. [2022-11-03 02:07:06,427 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 147 transitions. Word has length 34 [2022-11-03 02:07:06,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:06,428 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 147 transitions. [2022-11-03 02:07:06,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-03 02:07:06,429 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 147 transitions. [2022-11-03 02:07:06,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-03 02:07:06,431 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:06,431 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 02:07:06,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:07:06,432 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:07:06,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:06,432 INFO L85 PathProgramCache]: Analyzing trace with hash -424375952, now seen corresponding path program 1 times [2022-11-03 02:07:06,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:07:06,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434022300] [2022-11-03 02:07:06,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:06,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:07:06,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:07,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:07:07,046 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:07:07,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434022300] [2022-11-03 02:07:07,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434022300] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:07,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:07:07,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:07:07,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099962477] [2022-11-03 02:07:07,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:07,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:07:07,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:07:07,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:07:07,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:07:07,050 INFO L87 Difference]: Start difference. First operand 112 states and 147 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-03 02:07:08,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:08,366 INFO L93 Difference]: Finished difference Result 151 states and 192 transitions. [2022-11-03 02:07:08,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:07:08,367 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) Word has length 37 [2022-11-03 02:07:08,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:08,369 INFO L225 Difference]: With dead ends: 151 [2022-11-03 02:07:08,369 INFO L226 Difference]: Without dead ends: 116 [2022-11-03 02:07:08,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:07:08,371 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 0 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:08,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 640 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-03 02:07:08,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-11-03 02:07:08,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2022-11-03 02:07:08,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 66 states have (on average 1.1666666666666667) internal successors, (77), 67 states have internal predecessors, (77), 37 states have call successors, (37), 11 states have call predecessors, (37), 12 states have return successors, (37), 37 states have call predecessors, (37), 36 states have call successors, (37) [2022-11-03 02:07:08,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 151 transitions. [2022-11-03 02:07:08,387 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 151 transitions. Word has length 37 [2022-11-03 02:07:08,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:08,388 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 151 transitions. [2022-11-03 02:07:08,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-03 02:07:08,389 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 151 transitions. [2022-11-03 02:07:08,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-03 02:07:08,390 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:08,390 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 02:07:08,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 02:07:08,391 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:07:08,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:08,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1641044390, now seen corresponding path program 1 times [2022-11-03 02:07:08,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:07:08,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238236341] [2022-11-03 02:07:08,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:08,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:07:10,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:21,154 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:07:21,154 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:07:21,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238236341] [2022-11-03 02:07:21,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238236341] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:07:21,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224403339] [2022-11-03 02:07:21,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:21,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:07:21,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913ee18e-975a-4a78-9212-ad2038ef8a32/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:07:21,157 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913ee18e-975a-4a78-9212-ad2038ef8a32/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:07:21,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913ee18e-975a-4a78-9212-ad2038ef8a32/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:07:21,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:21,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 2458 conjuncts, 74 conjunts are in the unsatisfiable core [2022-11-03 02:07:21,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:07:22,351 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-03 02:07:22,361 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 02:07:29,035 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:07:29,035 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:07:29,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224403339] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:29,036 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:07:29,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [15] total 31 [2022-11-03 02:07:29,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976545291] [2022-11-03 02:07:29,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:29,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-03 02:07:29,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:07:29,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-03 02:07:29,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2022-11-03 02:07:29,038 INFO L87 Difference]: Start difference. First operand 116 states and 151 transitions. Second operand has 21 states, 11 states have (on average 2.090909090909091) internal successors, (23), 14 states have internal predecessors, (23), 8 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-11-03 02:07:32,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:32,512 INFO L93 Difference]: Finished difference Result 156 states and 198 transitions. [2022-11-03 02:07:32,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-03 02:07:32,521 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 11 states have (on average 2.090909090909091) internal successors, (23), 14 states have internal predecessors, (23), 8 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 40 [2022-11-03 02:07:32,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:32,529 INFO L225 Difference]: With dead ends: 156 [2022-11-03 02:07:32,534 INFO L226 Difference]: Without dead ends: 154 [2022-11-03 02:07:32,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=164, Invalid=1558, Unknown=0, NotChecked=0, Total=1722 [2022-11-03 02:07:32,536 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 69 mSDsluCounter, 809 mSDsCounter, 0 mSdLazyCounter, 859 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 885 SdHoareTripleChecker+Invalid, 1134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 228 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:32,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 885 Invalid, 1134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 859 Invalid, 0 Unknown, 228 Unchecked, 3.1s Time] [2022-11-03 02:07:32,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-11-03 02:07:32,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2022-11-03 02:07:32,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 88 states have (on average 1.1590909090909092) internal successors, (102), 90 states have internal predecessors, (102), 45 states have call successors, (45), 15 states have call predecessors, (45), 19 states have return successors, (48), 47 states have call predecessors, (48), 44 states have call successors, (48) [2022-11-03 02:07:32,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 195 transitions. [2022-11-03 02:07:32,582 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 195 transitions. Word has length 40 [2022-11-03 02:07:32,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:32,582 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 195 transitions. [2022-11-03 02:07:32,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 11 states have (on average 2.090909090909091) internal successors, (23), 14 states have internal predecessors, (23), 8 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-11-03 02:07:32,583 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 195 transitions. [2022-11-03 02:07:32,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-03 02:07:32,584 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:32,584 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:07:32,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913ee18e-975a-4a78-9212-ad2038ef8a32/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:07:32,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913ee18e-975a-4a78-9212-ad2038ef8a32/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:07:32,785 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:07:32,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:32,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1273911064, now seen corresponding path program 1 times [2022-11-03 02:07:32,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:07:32,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462955075] [2022-11-03 02:07:32,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:32,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:07:33,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:35,553 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 02:07:35,554 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:07:35,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462955075] [2022-11-03 02:07:35,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462955075] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:35,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:07:35,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 02:07:35,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524254463] [2022-11-03 02:07:35,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:35,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 02:07:35,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:07:35,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 02:07:35,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:07:35,556 INFO L87 Difference]: Start difference. First operand 153 states and 195 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-03 02:07:37,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:37,164 INFO L93 Difference]: Finished difference Result 312 states and 402 transitions. [2022-11-03 02:07:37,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:07:37,164 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 40 [2022-11-03 02:07:37,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:37,167 INFO L225 Difference]: With dead ends: 312 [2022-11-03 02:07:37,167 INFO L226 Difference]: Without dead ends: 184 [2022-11-03 02:07:37,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:07:37,169 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 55 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:37,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 640 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-03 02:07:37,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-11-03 02:07:37,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 167. [2022-11-03 02:07:37,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 96 states have (on average 1.1458333333333333) internal successors, (110), 99 states have internal predecessors, (110), 50 states have call successors, (50), 16 states have call predecessors, (50), 20 states have return successors, (53), 51 states have call predecessors, (53), 49 states have call successors, (53) [2022-11-03 02:07:37,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 213 transitions. [2022-11-03 02:07:37,220 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 213 transitions. Word has length 40 [2022-11-03 02:07:37,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:37,222 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 213 transitions. [2022-11-03 02:07:37,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-03 02:07:37,222 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 213 transitions. [2022-11-03 02:07:37,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-03 02:07:37,228 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:37,228 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:07:37,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 02:07:37,229 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:07:37,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:37,229 INFO L85 PathProgramCache]: Analyzing trace with hash 180781588, now seen corresponding path program 1 times [2022-11-03 02:07:37,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:07:37,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508918599] [2022-11-03 02:07:37,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:37,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:07:38,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:48,821 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 02:07:48,821 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:07:48,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508918599] [2022-11-03 02:07:48,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508918599] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:07:48,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257911372] [2022-11-03 02:07:48,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:48,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:07:48,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913ee18e-975a-4a78-9212-ad2038ef8a32/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:07:48,825 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913ee18e-975a-4a78-9212-ad2038ef8a32/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:07:48,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913ee18e-975a-4a78-9212-ad2038ef8a32/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:07:49,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:49,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 2461 conjuncts, 84 conjunts are in the unsatisfiable core [2022-11-03 02:07:49,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:07:49,634 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 02:07:57,404 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:07:57,405 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 78 treesize of output 62 [2022-11-03 02:07:57,464 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:07:57,465 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2022-11-03 02:07:57,736 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:07:57,739 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:07:57,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257911372] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:57,739 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:07:57,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [13] total 28 [2022-11-03 02:07:57,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545699590] [2022-11-03 02:07:57,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:57,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-03 02:07:57,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:07:57,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-03 02:07:57,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2022-11-03 02:07:57,742 INFO L87 Difference]: Start difference. First operand 167 states and 213 transitions. Second operand has 19 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 7 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-03 02:08:00,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:00,372 INFO L93 Difference]: Finished difference Result 237 states and 293 transitions. [2022-11-03 02:08:00,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-03 02:08:00,373 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 7 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) Word has length 44 [2022-11-03 02:08:00,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:00,375 INFO L225 Difference]: With dead ends: 237 [2022-11-03 02:08:00,376 INFO L226 Difference]: Without dead ends: 190 [2022-11-03 02:08:00,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=115, Invalid=815, Unknown=0, NotChecked=0, Total=930 [2022-11-03 02:08:00,378 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 32 mSDsluCounter, 1342 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 1341 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 214 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:00,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 1341 Invalid, 714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 495 Invalid, 0 Unknown, 214 Unchecked, 2.5s Time] [2022-11-03 02:08:00,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-11-03 02:08:00,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 171. [2022-11-03 02:08:00,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 99 states have (on average 1.1313131313131313) internal successors, (112), 102 states have internal predecessors, (112), 49 states have call successors, (49), 18 states have call predecessors, (49), 22 states have return successors, (52), 50 states have call predecessors, (52), 48 states have call successors, (52) [2022-11-03 02:08:00,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 213 transitions. [2022-11-03 02:08:00,409 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 213 transitions. Word has length 44 [2022-11-03 02:08:00,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:00,410 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 213 transitions. [2022-11-03 02:08:00,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 7 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-03 02:08:00,410 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 213 transitions. [2022-11-03 02:08:00,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-03 02:08:00,412 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:00,412 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 02:08:00,453 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913ee18e-975a-4a78-9212-ad2038ef8a32/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-03 02:08:00,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913ee18e-975a-4a78-9212-ad2038ef8a32/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:08:00,637 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:08:00,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:00,638 INFO L85 PathProgramCache]: Analyzing trace with hash -452361234, now seen corresponding path program 1 times [2022-11-03 02:08:00,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:08:00,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598409093] [2022-11-03 02:08:00,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:00,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:08:00,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:02,168 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:08:02,168 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:08:02,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598409093] [2022-11-03 02:08:02,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598409093] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:08:02,169 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:08:02,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:08:02,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122442155] [2022-11-03 02:08:02,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:08:02,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:08:02,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:08:02,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:08:02,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:08:02,172 INFO L87 Difference]: Start difference. First operand 171 states and 213 transitions. Second operand has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 4 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 02:08:04,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:04,678 INFO L93 Difference]: Finished difference Result 190 states and 236 transitions. [2022-11-03 02:08:04,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:08:04,678 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 4 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 46 [2022-11-03 02:08:04,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:04,680 INFO L225 Difference]: With dead ends: 190 [2022-11-03 02:08:04,680 INFO L226 Difference]: Without dead ends: 188 [2022-11-03 02:08:04,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:08:04,683 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 57 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:04,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 385 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-03 02:08:04,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-11-03 02:08:04,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 177. [2022-11-03 02:08:04,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 103 states have (on average 1.1262135922330097) internal successors, (116), 106 states have internal predecessors, (116), 50 states have call successors, (50), 19 states have call predecessors, (50), 23 states have return successors, (53), 51 states have call predecessors, (53), 49 states have call successors, (53) [2022-11-03 02:08:04,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 219 transitions. [2022-11-03 02:08:04,708 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 219 transitions. Word has length 46 [2022-11-03 02:08:04,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:04,709 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 219 transitions. [2022-11-03 02:08:04,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 4 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 02:08:04,709 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 219 transitions. [2022-11-03 02:08:04,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-03 02:08:04,710 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:04,711 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-03 02:08:04,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 02:08:04,711 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:08:04,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:04,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1055566720, now seen corresponding path program 1 times [2022-11-03 02:08:04,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:08:04,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017580803] [2022-11-03 02:08:04,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:04,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:08:04,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:05,760 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 02:08:05,760 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:08:05,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017580803] [2022-11-03 02:08:05,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017580803] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:08:05,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:08:05,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:08:05,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512950933] [2022-11-03 02:08:05,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:08:05,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:08:05,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:08:05,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:08:05,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:08:05,765 INFO L87 Difference]: Start difference. First operand 177 states and 219 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 4 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 02:08:06,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:06,880 INFO L93 Difference]: Finished difference Result 194 states and 239 transitions. [2022-11-03 02:08:06,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:08:06,881 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 4 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 52 [2022-11-03 02:08:06,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:06,883 INFO L225 Difference]: With dead ends: 194 [2022-11-03 02:08:06,883 INFO L226 Difference]: Without dead ends: 192 [2022-11-03 02:08:06,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:08:06,884 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 56 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:06,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 375 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 02:08:06,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-11-03 02:08:06,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 183. [2022-11-03 02:08:06,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 107 states have (on average 1.1214953271028036) internal successors, (120), 110 states have internal predecessors, (120), 51 states have call successors, (51), 20 states have call predecessors, (51), 24 states have return successors, (54), 52 states have call predecessors, (54), 50 states have call successors, (54) [2022-11-03 02:08:06,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 225 transitions. [2022-11-03 02:08:06,921 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 225 transitions. Word has length 52 [2022-11-03 02:08:06,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:06,923 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 225 transitions. [2022-11-03 02:08:06,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 4 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 02:08:06,923 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 225 transitions. [2022-11-03 02:08:06,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-03 02:08:06,928 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:06,929 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:08:06,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 02:08:06,929 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:08:06,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:06,930 INFO L85 PathProgramCache]: Analyzing trace with hash -501670539, now seen corresponding path program 1 times [2022-11-03 02:08:06,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:08:06,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832537501] [2022-11-03 02:08:06,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:06,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:08:08,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:10,195 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 02:08:10,196 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:08:10,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832537501] [2022-11-03 02:08:10,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832537501] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:08:10,196 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:08:10,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-03 02:08:10,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365734783] [2022-11-03 02:08:10,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:08:10,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-03 02:08:10,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:08:10,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-03 02:08:10,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:08:10,198 INFO L87 Difference]: Start difference. First operand 183 states and 225 transitions. Second operand has 11 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 10 states have internal predecessors, (30), 6 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-11-03 02:08:12,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:12,533 INFO L93 Difference]: Finished difference Result 210 states and 262 transitions. [2022-11-03 02:08:12,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 02:08:12,534 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 10 states have internal predecessors, (30), 6 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 54 [2022-11-03 02:08:12,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:12,536 INFO L225 Difference]: With dead ends: 210 [2022-11-03 02:08:12,536 INFO L226 Difference]: Without dead ends: 208 [2022-11-03 02:08:12,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-11-03 02:08:12,537 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 53 mSDsluCounter, 806 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 857 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:12,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 857 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-03 02:08:12,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-11-03 02:08:12,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 187. [2022-11-03 02:08:12,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 110 states have (on average 1.1181818181818182) internal successors, (123), 113 states have internal predecessors, (123), 51 states have call successors, (51), 21 states have call predecessors, (51), 25 states have return successors, (54), 52 states have call predecessors, (54), 50 states have call successors, (54) [2022-11-03 02:08:12,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 228 transitions. [2022-11-03 02:08:12,569 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 228 transitions. Word has length 54 [2022-11-03 02:08:12,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:12,570 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 228 transitions. [2022-11-03 02:08:12,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 10 states have internal predecessors, (30), 6 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-11-03 02:08:12,570 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 228 transitions. [2022-11-03 02:08:12,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-03 02:08:12,571 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:12,572 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:08:12,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 02:08:12,572 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:08:12,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:12,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1986068748, now seen corresponding path program 1 times [2022-11-03 02:08:12,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:08:12,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33435552] [2022-11-03 02:08:12,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:12,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:08:12,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:14,343 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 02:08:14,344 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:08:14,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33435552] [2022-11-03 02:08:14,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33435552] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:08:14,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:08:14,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:08:14,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014072171] [2022-11-03 02:08:14,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:08:14,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:08:14,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:08:14,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:08:14,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:08:14,346 INFO L87 Difference]: Start difference. First operand 187 states and 228 transitions. Second operand has 8 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 02:08:16,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:16,362 INFO L93 Difference]: Finished difference Result 202 states and 245 transitions. [2022-11-03 02:08:16,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:08:16,363 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 59 [2022-11-03 02:08:16,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:16,364 INFO L225 Difference]: With dead ends: 202 [2022-11-03 02:08:16,364 INFO L226 Difference]: Without dead ends: 200 [2022-11-03 02:08:16,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:08:16,365 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 60 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:16,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 367 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-03 02:08:16,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-11-03 02:08:16,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 194. [2022-11-03 02:08:16,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 115 states have (on average 1.1130434782608696) internal successors, (128), 118 states have internal predecessors, (128), 52 states have call successors, (52), 22 states have call predecessors, (52), 26 states have return successors, (55), 53 states have call predecessors, (55), 51 states have call successors, (55) [2022-11-03 02:08:16,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 235 transitions. [2022-11-03 02:08:16,399 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 235 transitions. Word has length 59 [2022-11-03 02:08:16,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:16,400 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 235 transitions. [2022-11-03 02:08:16,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 02:08:16,400 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 235 transitions. [2022-11-03 02:08:16,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-03 02:08:16,402 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:16,402 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-11-03 02:08:16,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 02:08:16,403 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:08:16,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:16,403 INFO L85 PathProgramCache]: Analyzing trace with hash 322424277, now seen corresponding path program 1 times [2022-11-03 02:08:16,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:08:16,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064746540] [2022-11-03 02:08:16,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:16,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:08:16,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:19,052 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 02:08:19,052 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:08:19,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064746540] [2022-11-03 02:08:19,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064746540] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:08:19,052 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:08:19,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-03 02:08:19,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400107450] [2022-11-03 02:08:19,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:08:19,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-03 02:08:19,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:08:19,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-03 02:08:19,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:08:19,054 INFO L87 Difference]: Start difference. First operand 194 states and 235 transitions. Second operand has 14 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 7 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) [2022-11-03 02:08:22,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:22,679 INFO L93 Difference]: Finished difference Result 217 states and 264 transitions. [2022-11-03 02:08:22,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 02:08:22,680 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 7 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) Word has length 64 [2022-11-03 02:08:22,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:22,682 INFO L225 Difference]: With dead ends: 217 [2022-11-03 02:08:22,682 INFO L226 Difference]: Without dead ends: 215 [2022-11-03 02:08:22,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-11-03 02:08:22,683 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 76 mSDsluCounter, 707 mSDsCounter, 0 mSdLazyCounter, 1197 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 814 SdHoareTripleChecker+Invalid, 1263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:22,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 814 Invalid, 1263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1197 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-03 02:08:22,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-11-03 02:08:22,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 198. [2022-11-03 02:08:22,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 118 states have (on average 1.1101694915254237) internal successors, (131), 121 states have internal predecessors, (131), 52 states have call successors, (52), 23 states have call predecessors, (52), 27 states have return successors, (55), 53 states have call predecessors, (55), 51 states have call successors, (55) [2022-11-03 02:08:22,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 238 transitions. [2022-11-03 02:08:22,716 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 238 transitions. Word has length 64 [2022-11-03 02:08:22,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:22,716 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 238 transitions. [2022-11-03 02:08:22,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 7 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) [2022-11-03 02:08:22,717 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 238 transitions. [2022-11-03 02:08:22,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-03 02:08:22,718 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:22,718 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:08:22,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-03 02:08:22,719 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:08:22,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:22,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1272784373, now seen corresponding path program 1 times [2022-11-03 02:08:22,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:08:22,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897904941] [2022-11-03 02:08:22,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:22,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:08:22,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:23,132 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-03 02:08:23,132 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:08:23,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897904941] [2022-11-03 02:08:23,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897904941] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:08:23,133 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:08:23,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:08:23,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548196749] [2022-11-03 02:08:23,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:08:23,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:08:23,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:08:23,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:08:23,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:08:23,135 INFO L87 Difference]: Start difference. First operand 198 states and 238 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-03 02:08:23,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:23,829 INFO L93 Difference]: Finished difference Result 271 states and 327 transitions. [2022-11-03 02:08:23,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:08:23,829 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) Word has length 66 [2022-11-03 02:08:23,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:23,831 INFO L225 Difference]: With dead ends: 271 [2022-11-03 02:08:23,831 INFO L226 Difference]: Without dead ends: 216 [2022-11-03 02:08:23,832 INFO L412 NwaCegarLoop]: 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 [2022-11-03 02:08:23,833 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 8 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:23,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 551 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 02:08:23,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-11-03 02:08:23,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 202. [2022-11-03 02:08:23,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 121 states have (on average 1.1074380165289257) internal successors, (134), 124 states have internal predecessors, (134), 52 states have call successors, (52), 23 states have call predecessors, (52), 28 states have return successors, (56), 54 states have call predecessors, (56), 51 states have call successors, (56) [2022-11-03 02:08:23,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 242 transitions. [2022-11-03 02:08:23,874 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 242 transitions. Word has length 66 [2022-11-03 02:08:23,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:23,877 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 242 transitions. [2022-11-03 02:08:23,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-03 02:08:23,878 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 242 transitions. [2022-11-03 02:08:23,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-03 02:08:23,879 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:23,879 INFO L195 NwaCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:08:23,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-03 02:08:23,880 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:08:23,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:23,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1331017075, now seen corresponding path program 1 times [2022-11-03 02:08:23,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:08:23,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148977416] [2022-11-03 02:08:23,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:23,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:08:24,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:24,745 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-03 02:08:24,745 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:08:24,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148977416] [2022-11-03 02:08:24,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148977416] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:08:24,745 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:08:24,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:08:24,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621594436] [2022-11-03 02:08:24,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:08:24,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:08:24,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:08:24,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:08:24,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:08:24,747 INFO L87 Difference]: Start difference. First operand 202 states and 242 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-03 02:08:25,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:25,719 INFO L93 Difference]: Finished difference Result 259 states and 309 transitions. [2022-11-03 02:08:25,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:08:25,720 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 71 [2022-11-03 02:08:25,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:25,722 INFO L225 Difference]: With dead ends: 259 [2022-11-03 02:08:25,722 INFO L226 Difference]: Without dead ends: 196 [2022-11-03 02:08:25,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:08:25,723 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 11 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:25,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 214 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 02:08:25,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-11-03 02:08:25,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 194. [2022-11-03 02:08:25,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 117 states have (on average 1.1025641025641026) internal successors, (129), 120 states have internal predecessors, (129), 49 states have call successors, (49), 22 states have call predecessors, (49), 27 states have return successors, (53), 51 states have call predecessors, (53), 48 states have call successors, (53) [2022-11-03 02:08:25,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 231 transitions. [2022-11-03 02:08:25,759 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 231 transitions. Word has length 71 [2022-11-03 02:08:25,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:25,759 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 231 transitions. [2022-11-03 02:08:25,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-03 02:08:25,760 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 231 transitions. [2022-11-03 02:08:25,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-03 02:08:25,761 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:25,761 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:08:25,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-03 02:08:25,762 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:08:25,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:25,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1772650051, now seen corresponding path program 1 times [2022-11-03 02:08:25,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:08:25,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883496509] [2022-11-03 02:08:25,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:25,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:08:25,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:26,087 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-03 02:08:26,087 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:08:26,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883496509] [2022-11-03 02:08:26,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883496509] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:08:26,088 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:08:26,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:08:26,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118308558] [2022-11-03 02:08:26,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:08:26,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:08:26,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:08:26,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:08:26,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:08:26,090 INFO L87 Difference]: Start difference. First operand 194 states and 231 transitions. Second operand has 6 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-03 02:08:27,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:27,420 INFO L93 Difference]: Finished difference Result 249 states and 296 transitions. [2022-11-03 02:08:27,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:08:27,421 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) Word has length 70 [2022-11-03 02:08:27,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:27,423 INFO L225 Difference]: With dead ends: 249 [2022-11-03 02:08:27,423 INFO L226 Difference]: Without dead ends: 203 [2022-11-03 02:08:27,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:08:27,424 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 3 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:27,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 611 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-03 02:08:27,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-11-03 02:08:27,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 196. [2022-11-03 02:08:27,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 119 states have (on average 1.0924369747899159) internal successors, (130), 122 states have internal predecessors, (130), 49 states have call successors, (49), 22 states have call predecessors, (49), 27 states have return successors, (53), 51 states have call predecessors, (53), 48 states have call successors, (53) [2022-11-03 02:08:27,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 232 transitions. [2022-11-03 02:08:27,461 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 232 transitions. Word has length 70 [2022-11-03 02:08:27,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:27,461 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 232 transitions. [2022-11-03 02:08:27,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-03 02:08:27,462 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 232 transitions. [2022-11-03 02:08:27,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-03 02:08:27,463 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:27,463 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:08:27,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-03 02:08:27,464 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:08:27,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:27,464 INFO L85 PathProgramCache]: Analyzing trace with hash -162484669, now seen corresponding path program 1 times [2022-11-03 02:08:27,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:08:27,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490846001] [2022-11-03 02:08:27,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:27,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:08:29,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:38,830 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 02:08:38,830 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:08:38,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490846001] [2022-11-03 02:08:38,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490846001] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:08:38,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318446533] [2022-11-03 02:08:38,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:38,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:08:38,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913ee18e-975a-4a78-9212-ad2038ef8a32/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:08:38,833 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913ee18e-975a-4a78-9212-ad2038ef8a32/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:08:38,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913ee18e-975a-4a78-9212-ad2038ef8a32/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:08:39,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:39,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 2600 conjuncts, 74 conjunts are in the unsatisfiable core [2022-11-03 02:08:39,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:08:39,656 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:08:39,660 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 02:08:47,184 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:08:47,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:08:51,011 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 76449 disjunctions. This might take some time... [2022-11-03 02:17:06,294 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 76449 disjunctions.