./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_priority_queue_top_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_priority_queue_top_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc --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 Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 1b920ac3045decc1a5a84e4c4a6d200f349784425219a23e0b9ddb547b7159b4 --- 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 [2022-11-02 20:31:25,440 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:31:25,443 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:31:25,500 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:31:25,501 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:31:25,503 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:31:25,506 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:31:25,512 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:31:25,515 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:31:25,518 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:31:25,519 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:31:25,522 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:31:25,524 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:31:25,529 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:31:25,531 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:31:25,533 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:31:25,535 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:31:25,544 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:31:25,546 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:31:25,548 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:31:25,550 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:31:25,552 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:31:25,554 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:31:25,555 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:31:25,559 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:31:25,560 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:31:25,560 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:31:25,561 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:31:25,562 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:31:25,563 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:31:25,564 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:31:25,565 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:31:25,566 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:31:25,567 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:31:25,569 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:31:25,570 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:31:25,571 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:31:25,571 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:31:25,571 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:31:25,573 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:31:25,574 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:31:25,578 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-11-02 20:31:25,631 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:31:25,635 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:31:25,636 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:31:25,636 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:31:25,638 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:31:25,639 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:31:25,640 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:31:25,640 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:31:25,640 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:31:25,641 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:31:25,642 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:31:25,643 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:31:25,643 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:31:25,643 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:31:25,644 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:31:25,644 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:31:25,644 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:31:25,644 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:31:25,645 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:31:25,645 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:31:25,645 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:31:25,646 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:31:25,646 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:31:25,646 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:31:25,647 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:31:25,647 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:31:25,647 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:31:25,647 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:31:25,648 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:31:25,648 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:31:25,648 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_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1b920ac3045decc1a5a84e4c4a6d200f349784425219a23e0b9ddb547b7159b4 [2022-11-02 20:31:26,015 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:31:26,049 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:31:26,053 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:31:26,056 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:31:26,057 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:31:26,059 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/aws-c-common/aws_priority_queue_top_harness.i [2022-11-02 20:31:26,153 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/data/a418625e2/95e9eb7338d44b05ac5be755b292a778/FLAGaad48f647 [2022-11-02 20:31:27,130 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:31:27,131 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/sv-benchmarks/c/aws-c-common/aws_priority_queue_top_harness.i [2022-11-02 20:31:27,199 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/data/a418625e2/95e9eb7338d44b05ac5be755b292a778/FLAGaad48f647 [2022-11-02 20:31:27,618 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/data/a418625e2/95e9eb7338d44b05ac5be755b292a778 [2022-11-02 20:31:27,621 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:31:27,626 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:31:27,629 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:31:27,629 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:31:27,635 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:31:27,636 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:31:27" (1/1) ... [2022-11-02 20:31:27,638 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f76a262 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:31:27, skipping insertion in model container [2022-11-02 20:31:27,638 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:31:27" (1/1) ... [2022-11-02 20:31:27,647 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:31:27,759 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:31:28,106 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_2da8dc41-6654-4330-b953-6e7acb1b6b8d/sv-benchmarks/c/aws-c-common/aws_priority_queue_top_harness.i[4496,4509] [2022-11-02 20:31:28,113 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_2da8dc41-6654-4330-b953-6e7acb1b6b8d/sv-benchmarks/c/aws-c-common/aws_priority_queue_top_harness.i[4556,4569] [2022-11-02 20:31:29,204 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-02 20:31:29,276 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:31:29,277 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:31:29,278 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:31:29,279 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:31:29,281 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:31:29,299 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:31:29,300 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:31:29,302 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:31:29,303 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:31:29,732 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-02 20:31:29,734 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-02 20:31:29,736 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-02 20:31:29,738 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-02 20:31:29,739 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-02 20:31:29,740 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-02 20:31:29,741 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-02 20:31:29,742 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-02 20:31:29,743 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-02 20:31:29,744 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-02 20:31:29,944 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:31:29,945 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:31:30,020 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:31:30,066 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:31:30,097 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_2da8dc41-6654-4330-b953-6e7acb1b6b8d/sv-benchmarks/c/aws-c-common/aws_priority_queue_top_harness.i[4496,4509] [2022-11-02 20:31:30,098 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_2da8dc41-6654-4330-b953-6e7acb1b6b8d/sv-benchmarks/c/aws-c-common/aws_priority_queue_top_harness.i[4556,4569] [2022-11-02 20:31:30,175 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-02 20:31:30,211 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:31:30,211 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:31:30,212 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:31:30,213 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:31:30,222 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:31:30,260 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:31:30,261 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:31:30,262 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:31:30,263 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:31:30,317 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-02 20:31:30,318 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-02 20:31:30,319 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-02 20:31:30,320 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-02 20:31:30,322 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-02 20:31:30,323 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-02 20:31:30,323 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-02 20:31:30,324 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-02 20:31:30,325 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-02 20:31:30,326 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-02 20:31:30,367 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:31:30,368 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:31:30,398 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:31:30,686 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:31:30,686 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:31:30 WrapperNode [2022-11-02 20:31:30,686 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:31:30,688 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:31:30,688 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:31:30,688 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:31:30,696 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:31:30" (1/1) ... [2022-11-02 20:31:30,774 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:31:30" (1/1) ... [2022-11-02 20:31:30,883 INFO L138 Inliner]: procedures = 689, calls = 1536, calls flagged for inlining = 55, calls inlined = 11, statements flattened = 719 [2022-11-02 20:31:30,885 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:31:30,885 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:31:30,886 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:31:30,886 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:31:30,896 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:31:30" (1/1) ... [2022-11-02 20:31:30,897 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:31:30" (1/1) ... [2022-11-02 20:31:30,922 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:31:30" (1/1) ... [2022-11-02 20:31:30,929 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:31:30" (1/1) ... [2022-11-02 20:31:30,974 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:31:30" (1/1) ... [2022-11-02 20:31:30,994 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:31:30" (1/1) ... [2022-11-02 20:31:31,015 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:31:30" (1/1) ... [2022-11-02 20:31:31,020 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:31:30" (1/1) ... [2022-11-02 20:31:31,030 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:31:31,031 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:31:31,031 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:31:31,031 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:31:31,034 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:31:30" (1/1) ... [2022-11-02 20:31:31,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:31:31,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:31:31,092 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:31:31,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:31:31,146 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2022-11-02 20:31:31,146 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2022-11-02 20:31:31,146 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 20:31:31,147 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_bounded [2022-11-02 20:31:31,147 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_bounded [2022-11-02 20:31:31,147 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_valid [2022-11-02 20:31:31,149 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_valid [2022-11-02 20:31:31,150 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2022-11-02 20:31:31,151 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2022-11-02 20:31:31,152 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-02 20:31:31,152 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2022-11-02 20:31:31,154 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2022-11-02 20:31:31,154 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-02 20:31:31,154 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-02 20:31:31,155 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-02 20:31:31,156 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:31:31,156 INFO L130 BoogieDeclarations]: Found specification of procedure save_byte_from_array [2022-11-02 20:31:31,156 INFO L138 BoogieDeclarations]: Found implementation of procedure save_byte_from_array [2022-11-02 20:31:31,157 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-02 20:31:31,157 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:31:31,157 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:31:31,158 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2022-11-02 20:31:31,158 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2022-11-02 20:31:31,158 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2022-11-02 20:31:31,158 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2022-11-02 20:31:31,159 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2022-11-02 20:31:31,160 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2022-11-02 20:31:31,160 INFO L130 BoogieDeclarations]: Found specification of procedure aws_priority_queue_is_valid [2022-11-02 20:31:31,160 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_priority_queue_is_valid [2022-11-02 20:31:31,160 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_length [2022-11-02 20:31:31,160 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_length [2022-11-02 20:31:31,161 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-02 20:31:31,162 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-02 20:31:31,162 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-02 20:31:31,162 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-02 20:31:31,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-02 20:31:31,162 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2022-11-02 20:31:31,163 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2022-11-02 20:31:31,163 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2022-11-02 20:31:31,163 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2022-11-02 20:31:31,164 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-02 20:31:31,164 INFO L130 BoogieDeclarations]: Found specification of procedure assert_array_list_equivalence [2022-11-02 20:31:31,164 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_array_list_equivalence [2022-11-02 20:31:31,165 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_array_list_has_allocated_data_member [2022-11-02 20:31:31,165 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_array_list_has_allocated_data_member [2022-11-02 20:31:31,165 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:31:31,597 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:31:31,620 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:31:33,264 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:31:33,281 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:31:33,282 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-02 20:31:33,285 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:31:33 BoogieIcfgContainer [2022-11-02 20:31:33,285 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:31:33,288 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:31:33,289 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:31:33,293 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:31:33,293 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:31:27" (1/3) ... [2022-11-02 20:31:33,294 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7788bc18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:31:33, skipping insertion in model container [2022-11-02 20:31:33,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:31:30" (2/3) ... [2022-11-02 20:31:33,296 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7788bc18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:31:33, skipping insertion in model container [2022-11-02 20:31:33,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:31:33" (3/3) ... [2022-11-02 20:31:33,300 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_priority_queue_top_harness.i [2022-11-02 20:31:33,326 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:31:33,327 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 20:31:33,442 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:31:33,457 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=PETRI_NET, 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;@3349b35e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:31:33,457 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-02 20:31:33,464 INFO L276 IsEmpty]: Start isEmpty. Operand has 192 states, 124 states have (on average 1.2338709677419355) internal successors, (153), 124 states have internal predecessors, (153), 50 states have call successors, (50), 17 states have call predecessors, (50), 17 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) [2022-11-02 20:31:33,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-11-02 20:31:33,500 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:31:33,502 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:31:33,503 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:31:33,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:31:33,516 INFO L85 PathProgramCache]: Analyzing trace with hash -2080692148, now seen corresponding path program 1 times [2022-11-02 20:31:33,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:31:33,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776356510] [2022-11-02 20:31:33,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:31:33,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:31:34,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:34,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:31:34,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:34,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 20:31:34,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:34,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-02 20:31:34,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:34,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-02 20:31:34,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:34,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:31:34,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:34,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-02 20:31:34,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:34,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-02 20:31:34,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:34,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:31:34,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:34,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-02 20:31:34,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:34,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-11-02 20:31:34,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:34,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-11-02 20:31:34,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:34,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-11-02 20:31:34,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:34,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-11-02 20:31:34,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:34,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-02 20:31:34,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:34,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:31:34,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:34,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-11-02 20:31:34,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:34,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-11-02 20:31:34,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:34,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-11-02 20:31:34,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:34,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-11-02 20:31:34,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:34,918 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2022-11-02 20:31:34,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:31:34,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776356510] [2022-11-02 20:31:34,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776356510] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:31:34,922 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:31:34,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 20:31:34,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133571831] [2022-11-02 20:31:34,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:31:34,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:31:34,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:31:34,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:31:34,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:31:34,986 INFO L87 Difference]: Start difference. First operand has 192 states, 124 states have (on average 1.2338709677419355) internal successors, (153), 124 states have internal predecessors, (153), 50 states have call successors, (50), 17 states have call predecessors, (50), 17 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 2 states have internal predecessors, (44), 2 states have call successors, (19), 6 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-02 20:31:35,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:31:35,948 INFO L93 Difference]: Finished difference Result 443 states and 653 transitions. [2022-11-02 20:31:35,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:31:35,951 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 2 states have internal predecessors, (44), 2 states have call successors, (19), 6 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 118 [2022-11-02 20:31:35,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:31:35,967 INFO L225 Difference]: With dead ends: 443 [2022-11-02 20:31:35,967 INFO L226 Difference]: Without dead ends: 257 [2022-11-02 20:31:35,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:31:35,977 INFO L413 NwaCegarLoop]: 229 mSDtfsCounter, 309 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-02 20:31:35,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [328 Valid, 382 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-02 20:31:36,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-11-02 20:31:36,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 187. [2022-11-02 20:31:36,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 119 states have (on average 1.2100840336134453) internal successors, (144), 120 states have internal predecessors, (144), 50 states have call successors, (50), 17 states have call predecessors, (50), 17 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) [2022-11-02 20:31:36,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 243 transitions. [2022-11-02 20:31:36,102 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 243 transitions. Word has length 118 [2022-11-02 20:31:36,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:31:36,105 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 243 transitions. [2022-11-02 20:31:36,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 2 states have internal predecessors, (44), 2 states have call successors, (19), 6 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-02 20:31:36,107 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 243 transitions. [2022-11-02 20:31:36,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-11-02 20:31:36,117 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:31:36,117 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:31:36,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 20:31:36,118 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:31:36,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:31:36,119 INFO L85 PathProgramCache]: Analyzing trace with hash 440490954, now seen corresponding path program 1 times [2022-11-02 20:31:36,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:31:36,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131014718] [2022-11-02 20:31:36,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:31:36,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:31:36,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:36,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:31:36,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:36,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 20:31:36,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:36,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-02 20:31:36,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:36,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-02 20:31:36,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:36,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:31:36,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:36,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-02 20:31:36,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:36,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-02 20:31:36,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:36,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:31:36,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:36,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-02 20:31:36,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:36,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-11-02 20:31:36,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:36,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-11-02 20:31:36,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:36,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-11-02 20:31:36,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:36,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-11-02 20:31:36,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:37,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-02 20:31:37,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:37,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:31:37,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:37,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-11-02 20:31:37,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:37,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-11-02 20:31:37,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:37,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-11-02 20:31:37,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:37,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-11-02 20:31:37,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:37,106 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2022-11-02 20:31:37,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:31:37,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131014718] [2022-11-02 20:31:37,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131014718] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:31:37,111 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:31:37,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-02 20:31:37,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472971639] [2022-11-02 20:31:37,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:31:37,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 20:31:37,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:31:37,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 20:31:37,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:31:37,118 INFO L87 Difference]: Start difference. First operand 187 states and 243 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 5 states have internal predecessors, (44), 3 states have call successors, (19), 6 states have call predecessors, (19), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-11-02 20:31:38,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:31:38,408 INFO L93 Difference]: Finished difference Result 407 states and 561 transitions. [2022-11-02 20:31:38,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-02 20:31:38,409 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 5 states have internal predecessors, (44), 3 states have call successors, (19), 6 states have call predecessors, (19), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 118 [2022-11-02 20:31:38,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:31:38,413 INFO L225 Difference]: With dead ends: 407 [2022-11-02 20:31:38,413 INFO L226 Difference]: Without dead ends: 257 [2022-11-02 20:31:38,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-11-02 20:31:38,416 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 379 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:31:38,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [427 Valid, 637 Invalid, 874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-02 20:31:38,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-11-02 20:31:38,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 187. [2022-11-02 20:31:38,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 119 states have (on average 1.2016806722689075) internal successors, (143), 120 states have internal predecessors, (143), 50 states have call successors, (50), 17 states have call predecessors, (50), 17 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) [2022-11-02 20:31:38,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 242 transitions. [2022-11-02 20:31:38,460 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 242 transitions. Word has length 118 [2022-11-02 20:31:38,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:31:38,463 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 242 transitions. [2022-11-02 20:31:38,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 5 states have internal predecessors, (44), 3 states have call successors, (19), 6 states have call predecessors, (19), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-11-02 20:31:38,463 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 242 transitions. [2022-11-02 20:31:38,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-02 20:31:38,465 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:31:38,465 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:31:38,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-02 20:31:38,466 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:31:38,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:31:38,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1705196580, now seen corresponding path program 1 times [2022-11-02 20:31:38,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:31:38,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153267024] [2022-11-02 20:31:38,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:31:38,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:31:38,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:39,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:31:39,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:39,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 20:31:39,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:39,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-02 20:31:39,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:39,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-02 20:31:39,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:39,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:31:39,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:39,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-02 20:31:39,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:39,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-02 20:31:39,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:39,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:31:39,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:39,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-02 20:31:39,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:39,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-11-02 20:31:39,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:39,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:31:39,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:39,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-11-02 20:31:39,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:39,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-11-02 20:31:39,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:39,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-11-02 20:31:39,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:39,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-11-02 20:31:39,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:39,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:31:39,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:39,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-11-02 20:31:39,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:39,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-11-02 20:31:39,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:39,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-11-02 20:31:39,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:39,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-11-02 20:31:39,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:39,689 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-11-02 20:31:39,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:31:39,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153267024] [2022-11-02 20:31:39,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153267024] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:31:39,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344558916] [2022-11-02 20:31:39,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:31:39,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:31:39,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:31:39,697 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:31:39,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 20:31:40,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:40,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 2405 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-02 20:31:40,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:31:40,724 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-11-02 20:31:40,725 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:31:40,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344558916] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:31:40,726 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:31:40,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [12] total 17 [2022-11-02 20:31:40,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987710000] [2022-11-02 20:31:40,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:31:40,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 20:31:40,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:31:40,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 20:31:40,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2022-11-02 20:31:40,732 INFO L87 Difference]: Start difference. First operand 187 states and 242 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 4 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2022-11-02 20:31:41,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:31:41,010 INFO L93 Difference]: Finished difference Result 356 states and 472 transitions. [2022-11-02 20:31:41,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:31:41,011 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 4 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 126 [2022-11-02 20:31:41,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:31:41,014 INFO L225 Difference]: With dead ends: 356 [2022-11-02 20:31:41,015 INFO L226 Difference]: Without dead ends: 189 [2022-11-02 20:31:41,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2022-11-02 20:31:41,021 INFO L413 NwaCegarLoop]: 237 mSDtfsCounter, 78 mSDsluCounter, 1040 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 1277 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:31:41,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 1277 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:31:41,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-11-02 20:31:41,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2022-11-02 20:31:41,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 120 states have (on average 1.2) internal successors, (144), 122 states have internal predecessors, (144), 50 states have call successors, (50), 17 states have call predecessors, (50), 18 states have return successors, (55), 49 states have call predecessors, (55), 49 states have call successors, (55) [2022-11-02 20:31:41,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 249 transitions. [2022-11-02 20:31:41,058 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 249 transitions. Word has length 126 [2022-11-02 20:31:41,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:31:41,060 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 249 transitions. [2022-11-02 20:31:41,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 4 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2022-11-02 20:31:41,060 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 249 transitions. [2022-11-02 20:31:41,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-02 20:31:41,063 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:31:41,063 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:31:41,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-02 20:31:41,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:31:41,277 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:31:41,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:31:41,278 INFO L85 PathProgramCache]: Analyzing trace with hash -371731420, now seen corresponding path program 1 times [2022-11-02 20:31:41,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:31:41,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323587980] [2022-11-02 20:31:41,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:31:41,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:31:41,387 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:31:41,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [628910732] [2022-11-02 20:31:41,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:31:41,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:31:41,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:31:41,389 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:31:41,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 20:31:42,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:42,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 2541 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-02 20:31:42,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:31:42,074 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-02 20:31:42,074 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:31:42,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:31:42,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323587980] [2022-11-02 20:31:42,075 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:31:42,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628910732] [2022-11-02 20:31:42,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628910732] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:31:42,076 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:31:42,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:31:42,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365376051] [2022-11-02 20:31:42,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:31:42,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:31:42,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:31:42,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:31:42,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:31:42,080 INFO L87 Difference]: Start difference. First operand 189 states and 249 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-02 20:31:42,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:31:42,135 INFO L93 Difference]: Finished difference Result 344 states and 467 transitions. [2022-11-02 20:31:42,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:31:42,136 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 141 [2022-11-02 20:31:42,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:31:42,145 INFO L225 Difference]: With dead ends: 344 [2022-11-02 20:31:42,145 INFO L226 Difference]: Without dead ends: 194 [2022-11-02 20:31:42,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:31:42,161 INFO L413 NwaCegarLoop]: 241 mSDtfsCounter, 10 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 713 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:31:42,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 713 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:31:42,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-11-02 20:31:42,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 191. [2022-11-02 20:31:42,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 122 states have (on average 1.1967213114754098) internal successors, (146), 124 states have internal predecessors, (146), 50 states have call successors, (50), 17 states have call predecessors, (50), 18 states have return successors, (55), 49 states have call predecessors, (55), 49 states have call successors, (55) [2022-11-02 20:31:42,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 251 transitions. [2022-11-02 20:31:42,196 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 251 transitions. Word has length 141 [2022-11-02 20:31:42,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:31:42,198 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 251 transitions. [2022-11-02 20:31:42,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-02 20:31:42,199 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 251 transitions. [2022-11-02 20:31:42,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-02 20:31:42,205 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:31:42,205 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:31:42,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 20:31:42,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:31:42,429 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:31:42,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:31:42,430 INFO L85 PathProgramCache]: Analyzing trace with hash 120894754, now seen corresponding path program 1 times [2022-11-02 20:31:42,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:31:42,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186848236] [2022-11-02 20:31:42,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:31:42,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:31:42,556 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:31:42,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [699532248] [2022-11-02 20:31:42,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:31:42,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:31:42,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:31:42,558 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:31:42,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 20:31:43,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:43,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 2546 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-02 20:31:43,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:31:43,446 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-11-02 20:31:43,446 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:31:43,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:31:43,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186848236] [2022-11-02 20:31:43,447 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:31:43,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699532248] [2022-11-02 20:31:43,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699532248] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:31:43,447 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:31:43,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-02 20:31:43,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968102787] [2022-11-02 20:31:43,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:31:43,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 20:31:43,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:31:43,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 20:31:43,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:31:43,455 INFO L87 Difference]: Start difference. First operand 191 states and 251 transitions. Second operand has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 4 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2022-11-02 20:31:43,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:31:43,854 INFO L93 Difference]: Finished difference Result 346 states and 457 transitions. [2022-11-02 20:31:43,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:31:43,855 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 4 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) Word has length 141 [2022-11-02 20:31:43,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:31:43,859 INFO L225 Difference]: With dead ends: 346 [2022-11-02 20:31:43,860 INFO L226 Difference]: Without dead ends: 191 [2022-11-02 20:31:43,861 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-02 20:31:43,862 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 278 mSDsluCounter, 710 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 907 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:31:43,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [278 Valid, 907 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 20:31:43,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-11-02 20:31:43,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2022-11-02 20:31:43,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 122 states have (on average 1.1885245901639345) internal successors, (145), 124 states have internal predecessors, (145), 50 states have call successors, (50), 17 states have call predecessors, (50), 18 states have return successors, (55), 49 states have call predecessors, (55), 49 states have call successors, (55) [2022-11-02 20:31:43,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 250 transitions. [2022-11-02 20:31:43,894 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 250 transitions. Word has length 141 [2022-11-02 20:31:43,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:31:43,896 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 250 transitions. [2022-11-02 20:31:43,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 4 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2022-11-02 20:31:43,896 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 250 transitions. [2022-11-02 20:31:43,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-11-02 20:31:43,900 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:31:43,900 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:31:43,957 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 20:31:44,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:31:44,125 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:31:44,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:31:44,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1915037087, now seen corresponding path program 1 times [2022-11-02 20:31:44,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:31:44,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25275088] [2022-11-02 20:31:44,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:31:44,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:31:44,224 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:31:44,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1145569177] [2022-11-02 20:31:44,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:31:44,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:31:44,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:31:44,226 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:31:44,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 20:31:44,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:45,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 2618 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:31:45,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:31:45,179 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-02 20:31:45,180 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:31:45,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:31:45,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25275088] [2022-11-02 20:31:45,180 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:31:45,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145569177] [2022-11-02 20:31:45,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145569177] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:31:45,181 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:31:45,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-02 20:31:45,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476879413] [2022-11-02 20:31:45,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:31:45,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 20:31:45,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:31:45,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 20:31:45,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:31:45,185 INFO L87 Difference]: Start difference. First operand 191 states and 250 transitions. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 5 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2022-11-02 20:31:45,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:31:45,551 INFO L93 Difference]: Finished difference Result 359 states and 474 transitions. [2022-11-02 20:31:45,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 20:31:45,552 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 5 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) Word has length 157 [2022-11-02 20:31:45,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:31:45,554 INFO L225 Difference]: With dead ends: 359 [2022-11-02 20:31:45,554 INFO L226 Difference]: Without dead ends: 191 [2022-11-02 20:31:45,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-11-02 20:31:45,557 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 116 mSDsluCounter, 1140 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 1353 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:31:45,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 1353 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 20:31:45,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-11-02 20:31:45,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2022-11-02 20:31:45,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 122 states have (on average 1.1885245901639345) internal successors, (145), 124 states have internal predecessors, (145), 50 states have call successors, (50), 17 states have call predecessors, (50), 18 states have return successors, (54), 49 states have call predecessors, (54), 49 states have call successors, (54) [2022-11-02 20:31:45,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 249 transitions. [2022-11-02 20:31:45,590 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 249 transitions. Word has length 157 [2022-11-02 20:31:45,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:31:45,592 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 249 transitions. [2022-11-02 20:31:45,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 5 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2022-11-02 20:31:45,593 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 249 transitions. [2022-11-02 20:31:45,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-11-02 20:31:45,596 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:31:45,596 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:31:45,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 20:31:45,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:31:45,817 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:31:45,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:31:45,818 INFO L85 PathProgramCache]: Analyzing trace with hash 725110269, now seen corresponding path program 2 times [2022-11-02 20:31:45,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:31:45,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445230272] [2022-11-02 20:31:45,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:31:45,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:31:45,934 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:31:45,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1485591343] [2022-11-02 20:31:45,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:31:45,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:31:45,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:31:45,936 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:31:45,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 20:31:46,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:31:46,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:31:46,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 2759 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-02 20:31:46,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:31:47,016 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2022-11-02 20:31:47,016 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:31:47,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:31:47,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445230272] [2022-11-02 20:31:47,017 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:31:47,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485591343] [2022-11-02 20:31:47,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485591343] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:31:47,017 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:31:47,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-02 20:31:47,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430915805] [2022-11-02 20:31:47,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:31:47,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 20:31:47,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:31:47,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 20:31:47,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:31:47,020 INFO L87 Difference]: Start difference. First operand 191 states and 249 transitions. Second operand has 9 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 5 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (21), 4 states have call predecessors, (21), 3 states have call successors, (21) [2022-11-02 20:31:47,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:31:47,583 INFO L93 Difference]: Finished difference Result 334 states and 442 transitions. [2022-11-02 20:31:47,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:31:47,584 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 5 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (21), 4 states have call predecessors, (21), 3 states have call successors, (21) Word has length 172 [2022-11-02 20:31:47,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:31:47,587 INFO L225 Difference]: With dead ends: 334 [2022-11-02 20:31:47,587 INFO L226 Difference]: Without dead ends: 203 [2022-11-02 20:31:47,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-11-02 20:31:47,589 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 270 mSDsluCounter, 1068 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 1261 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:31:47,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [276 Valid, 1261 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-02 20:31:47,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-11-02 20:31:47,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2022-11-02 20:31:47,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 128 states have (on average 1.1875) internal successors, (152), 130 states have internal predecessors, (152), 55 states have call successors, (55), 18 states have call predecessors, (55), 19 states have return successors, (59), 54 states have call predecessors, (59), 54 states have call successors, (59) [2022-11-02 20:31:47,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 266 transitions. [2022-11-02 20:31:47,614 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 266 transitions. Word has length 172 [2022-11-02 20:31:47,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:31:47,615 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 266 transitions. [2022-11-02 20:31:47,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 5 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (21), 4 states have call predecessors, (21), 3 states have call successors, (21) [2022-11-02 20:31:47,615 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 266 transitions. [2022-11-02 20:31:47,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2022-11-02 20:31:47,619 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:31:47,620 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:31:47,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-02 20:31:47,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-02 20:31:47,844 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:31:47,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:31:47,844 INFO L85 PathProgramCache]: Analyzing trace with hash -606014439, now seen corresponding path program 1 times [2022-11-02 20:31:47,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:31:47,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940130388] [2022-11-02 20:31:47,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:31:47,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:31:47,973 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:31:47,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [360253535] [2022-11-02 20:31:47,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:31:47,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:31:47,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:31:47,975 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:31:47,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 20:31:48,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:48,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 3041 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-02 20:31:48,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:31:48,952 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2022-11-02 20:31:48,953 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:31:48,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:31:48,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940130388] [2022-11-02 20:31:48,953 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:31:48,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360253535] [2022-11-02 20:31:48,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360253535] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:31:48,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:31:48,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 20:31:48,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788737974] [2022-11-02 20:31:48,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:31:48,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:31:48,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:31:48,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:31:48,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:31:48,956 INFO L87 Difference]: Start difference. First operand 203 states and 266 transitions. Second operand has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-02 20:31:49,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:31:49,441 INFO L93 Difference]: Finished difference Result 385 states and 510 transitions. [2022-11-02 20:31:49,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 20:31:49,443 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 202 [2022-11-02 20:31:49,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:31:49,445 INFO L225 Difference]: With dead ends: 385 [2022-11-02 20:31:49,445 INFO L226 Difference]: Without dead ends: 221 [2022-11-02 20:31:49,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:31:49,447 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 21 mSDsluCounter, 832 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 1068 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:31:49,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 1068 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-02 20:31:49,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-11-02 20:31:49,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 207. [2022-11-02 20:31:49,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 132 states have (on average 1.1893939393939394) internal successors, (157), 134 states have internal predecessors, (157), 55 states have call successors, (55), 18 states have call predecessors, (55), 19 states have return successors, (59), 54 states have call predecessors, (59), 54 states have call successors, (59) [2022-11-02 20:31:49,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 271 transitions. [2022-11-02 20:31:49,472 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 271 transitions. Word has length 202 [2022-11-02 20:31:49,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:31:49,473 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 271 transitions. [2022-11-02 20:31:49,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-02 20:31:49,473 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 271 transitions. [2022-11-02 20:31:49,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2022-11-02 20:31:49,476 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:31:49,477 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:31:49,529 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-02 20:31:49,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-02 20:31:49,701 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:31:49,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:31:49,702 INFO L85 PathProgramCache]: Analyzing trace with hash 995056667, now seen corresponding path program 1 times [2022-11-02 20:31:49,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:31:49,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100434574] [2022-11-02 20:31:49,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:31:49,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:31:49,836 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:31:49,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [376563286] [2022-11-02 20:31:49,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:31:49,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:31:49,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:31:49,839 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:31:49,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-02 20:31:50,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:50,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 3038 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-02 20:31:50,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:31:50,683 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2022-11-02 20:31:50,683 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:31:50,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:31:50,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100434574] [2022-11-02 20:31:50,684 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:31:50,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376563286] [2022-11-02 20:31:50,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376563286] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:31:50,684 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:31:50,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:31:50,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239151225] [2022-11-02 20:31:50,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:31:50,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:31:50,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:31:50,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:31:50,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:31:50,687 INFO L87 Difference]: Start difference. First operand 207 states and 271 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-02 20:31:50,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:31:50,736 INFO L93 Difference]: Finished difference Result 379 states and 500 transitions. [2022-11-02 20:31:50,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:31:50,737 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 202 [2022-11-02 20:31:50,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:31:50,740 INFO L225 Difference]: With dead ends: 379 [2022-11-02 20:31:50,740 INFO L226 Difference]: Without dead ends: 211 [2022-11-02 20:31:50,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:31:50,743 INFO L413 NwaCegarLoop]: 238 mSDtfsCounter, 3 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 709 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:31:50,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 709 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:31:50,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-11-02 20:31:50,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 209. [2022-11-02 20:31:50,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 134 states have (on average 1.1865671641791045) internal successors, (159), 136 states have internal predecessors, (159), 55 states have call successors, (55), 18 states have call predecessors, (55), 19 states have return successors, (59), 54 states have call predecessors, (59), 54 states have call successors, (59) [2022-11-02 20:31:50,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 273 transitions. [2022-11-02 20:31:50,768 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 273 transitions. Word has length 202 [2022-11-02 20:31:50,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:31:50,769 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 273 transitions. [2022-11-02 20:31:50,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-02 20:31:50,770 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 273 transitions. [2022-11-02 20:31:50,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2022-11-02 20:31:50,773 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:31:50,774 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:31:50,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-02 20:31:51,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:31:51,001 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:31:51,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:31:51,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1948525411, now seen corresponding path program 1 times [2022-11-02 20:31:51,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:31:51,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985823793] [2022-11-02 20:31:51,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:31:51,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:31:51,135 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:31:51,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [981469297] [2022-11-02 20:31:51,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:31:51,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:31:51,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:31:51,137 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:31:51,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-02 20:31:52,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:52,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 3033 conjuncts, 116 conjunts are in the unsatisfiable core [2022-11-02 20:31:52,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:31:56,162 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-02 20:31:56,163 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 40 treesize of output 20 [2022-11-02 20:31:56,558 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 136 proven. 4 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-02 20:31:56,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:32:01,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:32:01,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985823793] [2022-11-02 20:32:01,625 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:32:01,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981469297] [2022-11-02 20:32:01,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981469297] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:32:01,625 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:32:01,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-11-02 20:32:01,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016367118] [2022-11-02 20:32:01,626 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-02 20:32:01,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-02 20:32:01,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:32:01,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-02 20:32:01,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=730, Unknown=0, NotChecked=0, Total=812 [2022-11-02 20:32:01,629 INFO L87 Difference]: Start difference. First operand 209 states and 273 transitions. Second operand has 19 states, 18 states have (on average 5.111111111111111) internal successors, (92), 17 states have internal predecessors, (92), 7 states have call successors, (25), 5 states have call predecessors, (25), 6 states have return successors, (23), 6 states have call predecessors, (23), 7 states have call successors, (23) [2022-11-02 20:32:08,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:32:08,877 INFO L93 Difference]: Finished difference Result 687 states and 927 transitions. [2022-11-02 20:32:08,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-02 20:32:08,878 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 5.111111111111111) internal successors, (92), 17 states have internal predecessors, (92), 7 states have call successors, (25), 5 states have call predecessors, (25), 6 states have return successors, (23), 6 states have call predecessors, (23), 7 states have call successors, (23) Word has length 202 [2022-11-02 20:32:08,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:32:08,886 INFO L225 Difference]: With dead ends: 687 [2022-11-02 20:32:08,886 INFO L226 Difference]: Without dead ends: 529 [2022-11-02 20:32:08,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 251 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=311, Invalid=2239, Unknown=0, NotChecked=0, Total=2550 [2022-11-02 20:32:08,896 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 533 mSDsluCounter, 1122 mSDsCounter, 0 mSdLazyCounter, 2750 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 597 SdHoareTripleChecker+Valid, 1394 SdHoareTripleChecker+Invalid, 3607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 2750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 592 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:32:08,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [597 Valid, 1394 Invalid, 3607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 2750 Invalid, 0 Unknown, 592 Unchecked, 4.4s Time] [2022-11-02 20:32:08,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2022-11-02 20:32:08,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 395. [2022-11-02 20:32:08,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 257 states have (on average 1.1906614785992218) internal successors, (306), 263 states have internal predecessors, (306), 99 states have call successors, (99), 33 states have call predecessors, (99), 38 states have return successors, (112), 98 states have call predecessors, (112), 97 states have call successors, (112) [2022-11-02 20:32:08,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 517 transitions. [2022-11-02 20:32:08,952 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 517 transitions. Word has length 202 [2022-11-02 20:32:08,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:32:08,952 INFO L495 AbstractCegarLoop]: Abstraction has 395 states and 517 transitions. [2022-11-02 20:32:08,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 5.111111111111111) internal successors, (92), 17 states have internal predecessors, (92), 7 states have call successors, (25), 5 states have call predecessors, (25), 6 states have return successors, (23), 6 states have call predecessors, (23), 7 states have call successors, (23) [2022-11-02 20:32:08,953 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 517 transitions. [2022-11-02 20:32:08,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2022-11-02 20:32:08,959 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:32:08,959 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:32:09,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-02 20:32:09,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:32:09,177 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:32:09,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:32:09,178 INFO L85 PathProgramCache]: Analyzing trace with hash 425026459, now seen corresponding path program 1 times [2022-11-02 20:32:09,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:32:09,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590285161] [2022-11-02 20:32:09,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:32:09,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:32:09,297 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:32:09,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1239967147] [2022-11-02 20:32:09,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:32:09,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:32:09,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:32:09,299 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:32:09,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-02 20:32:10,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:32:10,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 3036 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-02 20:32:10,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:32:10,103 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2022-11-02 20:32:10,104 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:32:10,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:32:10,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590285161] [2022-11-02 20:32:10,104 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:32:10,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239967147] [2022-11-02 20:32:10,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239967147] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:32:10,105 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:32:10,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:32:10,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151998199] [2022-11-02 20:32:10,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:32:10,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:32:10,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:32:10,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:32:10,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:32:10,109 INFO L87 Difference]: Start difference. First operand 395 states and 517 transitions. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-02 20:32:10,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:32:10,201 INFO L93 Difference]: Finished difference Result 649 states and 847 transitions. [2022-11-02 20:32:10,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:32:10,202 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 202 [2022-11-02 20:32:10,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:32:10,208 INFO L225 Difference]: With dead ends: 649 [2022-11-02 20:32:10,209 INFO L226 Difference]: Without dead ends: 419 [2022-11-02 20:32:10,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:32:10,211 INFO L413 NwaCegarLoop]: 252 mSDtfsCounter, 8 mSDsluCounter, 730 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 982 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:32:10,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 982 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:32:10,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2022-11-02 20:32:10,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 407. [2022-11-02 20:32:10,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 269 states have (on average 1.1933085501858736) internal successors, (321), 275 states have internal predecessors, (321), 99 states have call successors, (99), 33 states have call predecessors, (99), 38 states have return successors, (112), 98 states have call predecessors, (112), 97 states have call successors, (112) [2022-11-02 20:32:10,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 532 transitions. [2022-11-02 20:32:10,254 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 532 transitions. Word has length 202 [2022-11-02 20:32:10,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:32:10,257 INFO L495 AbstractCegarLoop]: Abstraction has 407 states and 532 transitions. [2022-11-02 20:32:10,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-02 20:32:10,258 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 532 transitions. [2022-11-02 20:32:10,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2022-11-02 20:32:10,261 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:32:10,261 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:32:10,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-02 20:32:10,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:32:10,485 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:32:10,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:32:10,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1913156837, now seen corresponding path program 1 times [2022-11-02 20:32:10,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:32:10,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345709481] [2022-11-02 20:32:10,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:32:10,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:32:10,604 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:32:10,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2127003421] [2022-11-02 20:32:10,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:32:10,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:32:10,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:32:10,606 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:32:10,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-02 20:32:11,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:32:11,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 3038 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-02 20:32:11,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:32:11,515 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2022-11-02 20:32:11,515 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:32:11,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:32:11,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345709481] [2022-11-02 20:32:11,516 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:32:11,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127003421] [2022-11-02 20:32:11,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127003421] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:32:11,517 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:32:11,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:32:11,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731171841] [2022-11-02 20:32:11,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:32:11,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:32:11,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:32:11,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:32:11,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:32:11,520 INFO L87 Difference]: Start difference. First operand 407 states and 532 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-02 20:32:11,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:32:11,586 INFO L93 Difference]: Finished difference Result 767 states and 1006 transitions. [2022-11-02 20:32:11,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:32:11,588 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 202 [2022-11-02 20:32:11,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:32:11,591 INFO L225 Difference]: With dead ends: 767 [2022-11-02 20:32:11,591 INFO L226 Difference]: Without dead ends: 399 [2022-11-02 20:32:11,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:32:11,594 INFO L413 NwaCegarLoop]: 241 mSDtfsCounter, 2 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 712 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:32:11,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 712 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:32:11,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2022-11-02 20:32:11,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 397. [2022-11-02 20:32:11,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 259 states have (on average 1.1737451737451738) internal successors, (304), 265 states have internal predecessors, (304), 99 states have call successors, (99), 33 states have call predecessors, (99), 38 states have return successors, (112), 98 states have call predecessors, (112), 97 states have call successors, (112) [2022-11-02 20:32:11,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 515 transitions. [2022-11-02 20:32:11,628 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 515 transitions. Word has length 202 [2022-11-02 20:32:11,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:32:11,629 INFO L495 AbstractCegarLoop]: Abstraction has 397 states and 515 transitions. [2022-11-02 20:32:11,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-02 20:32:11,629 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 515 transitions. [2022-11-02 20:32:11,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-11-02 20:32:11,633 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:32:11,633 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:32:11,677 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-02 20:32:11,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:32:11,853 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:32:11,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:32:11,854 INFO L85 PathProgramCache]: Analyzing trace with hash -89821291, now seen corresponding path program 1 times [2022-11-02 20:32:11,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:32:11,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60318309] [2022-11-02 20:32:11,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:32:11,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:32:11,938 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:32:11,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [242272033] [2022-11-02 20:32:11,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:32:11,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:32:11,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:32:11,940 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:32:11,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-02 20:32:12,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:32:12,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 3078 conjuncts, 80 conjunts are in the unsatisfiable core [2022-11-02 20:32:12,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:32:13,220 WARN L855 $PredicateComparison]: unable to prove that (exists ((|aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| Int)) (and (exists ((v_ArrVal_1801 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| v_ArrVal_1801))) (exists ((v_ArrVal_1802 (Array Int Int))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| v_ArrVal_1802))))) is different from true [2022-11-02 20:32:13,587 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-02 20:32:13,588 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-02 20:32:13,614 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-02 20:32:13,615 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-02 20:32:13,624 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-02 20:32:13,630 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-02 20:32:13,725 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2022-11-02 20:32:13,757 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 146 proven. 6 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2022-11-02 20:32:13,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:32:16,033 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse6 (+ 40 |c_ULTIMATE.start_aws_priority_queue_top_harness_~#queue~0#1.offset|))) (let ((.cse1 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_aws_priority_queue_top_harness_~#queue~0#1.base|) .cse6)) (.cse2 (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_aws_priority_queue_top_harness_~#queue~0#1.base|) .cse6))) (and (forall ((|v_ULTIMATE.start_aws_priority_queue_top_harness_~#old_container~0#1.base_7| Int) (|v_ULTIMATE.start_aws_priority_queue_top_harness_~#old_container~0#1.offset_7| Int)) (let ((.cse3 (+ 32 |v_ULTIMATE.start_aws_priority_queue_top_harness_~#old_container~0#1.offset_7|))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_priority_queue_top_harness_~#old_container~0#1.base_7|) .cse3))) (or (not (= .cse0 .cse1)) (not (= .cse2 (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_priority_queue_top_harness_~#old_container~0#1.base_7|) .cse3))) (= .cse0 0))))) (forall ((|v_ULTIMATE.start_aws_priority_queue_top_harness_~#old_container~0#1.base_7| Int) (|v_ULTIMATE.start_aws_priority_queue_top_harness_~#old_container~0#1.offset_7| Int)) (let ((.cse4 (+ 32 |v_ULTIMATE.start_aws_priority_queue_top_harness_~#old_container~0#1.offset_7|))) (let ((.cse5 (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_priority_queue_top_harness_~#old_container~0#1.base_7|) .cse4))) (or (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_priority_queue_top_harness_~#old_container~0#1.base_7|) .cse4) .cse1)) (not (= .cse2 .cse5)) (= 0 .cse5)))))))) is different from false [2022-11-02 20:32:16,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:32:16,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60318309] [2022-11-02 20:32:16,066 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:32:16,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242272033] [2022-11-02 20:32:16,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242272033] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:32:16,067 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:32:16,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-11-02 20:32:16,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257046502] [2022-11-02 20:32:16,067 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-02 20:32:16,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:32:16,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:32:16,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:32:16,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=324, Unknown=18, NotChecked=74, Total=462 [2022-11-02 20:32:16,069 INFO L87 Difference]: Start difference. First operand 397 states and 515 transitions. Second operand has 18 states, 18 states have (on average 5.611111111111111) internal successors, (101), 16 states have internal predecessors, (101), 8 states have call successors, (28), 3 states have call predecessors, (28), 5 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2022-11-02 20:32:19,854 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-02 20:32:20,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:32:20,480 INFO L93 Difference]: Finished difference Result 929 states and 1253 transitions. [2022-11-02 20:32:20,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-02 20:32:20,482 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.611111111111111) internal successors, (101), 16 states have internal predecessors, (101), 8 states have call successors, (28), 3 states have call predecessors, (28), 5 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) Word has length 209 [2022-11-02 20:32:20,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:32:20,486 INFO L225 Difference]: With dead ends: 929 [2022-11-02 20:32:20,486 INFO L226 Difference]: Without dead ends: 567 [2022-11-02 20:32:20,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 279 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=106, Invalid=801, Unknown=31, NotChecked=118, Total=1056 [2022-11-02 20:32:20,490 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 142 mSDsluCounter, 1432 mSDsCounter, 0 mSdLazyCounter, 1830 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 1659 SdHoareTripleChecker+Invalid, 2694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 801 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-02 20:32:20,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 1659 Invalid, 2694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1830 Invalid, 0 Unknown, 801 Unchecked, 3.6s Time] [2022-11-02 20:32:20,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2022-11-02 20:32:20,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 441. [2022-11-02 20:32:20,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 295 states have (on average 1.1728813559322033) internal successors, (346), 303 states have internal predecessors, (346), 101 states have call successors, (101), 33 states have call predecessors, (101), 44 states have return successors, (156), 104 states have call predecessors, (156), 99 states have call successors, (156) [2022-11-02 20:32:20,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 603 transitions. [2022-11-02 20:32:20,540 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 603 transitions. Word has length 209 [2022-11-02 20:32:20,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:32:20,541 INFO L495 AbstractCegarLoop]: Abstraction has 441 states and 603 transitions. [2022-11-02 20:32:20,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.611111111111111) internal successors, (101), 16 states have internal predecessors, (101), 8 states have call successors, (28), 3 states have call predecessors, (28), 5 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2022-11-02 20:32:20,542 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 603 transitions. [2022-11-02 20:32:20,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2022-11-02 20:32:20,546 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:32:20,546 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:32:20,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-02 20:32:20,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-02 20:32:20,757 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:32:20,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:32:20,758 INFO L85 PathProgramCache]: Analyzing trace with hash 2064592787, now seen corresponding path program 1 times [2022-11-02 20:32:20,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:32:20,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469547920] [2022-11-02 20:32:20,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:32:20,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:32:20,858 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:32:20,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1515413459] [2022-11-02 20:32:20,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:32:20,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:32:20,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:32:20,861 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:32:20,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-02 20:32:21,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:32:21,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 3090 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-02 20:32:21,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:32:21,933 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-11-02 20:32:21,934 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:32:21,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:32:21,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469547920] [2022-11-02 20:32:21,934 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:32:21,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515413459] [2022-11-02 20:32:21,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515413459] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:32:21,935 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:32:21,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-02 20:32:21,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173143656] [2022-11-02 20:32:21,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:32:21,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-02 20:32:21,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:32:21,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-02 20:32:21,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:32:21,938 INFO L87 Difference]: Start difference. First operand 441 states and 603 transitions. Second operand has 14 states, 12 states have (on average 9.083333333333334) internal successors, (109), 11 states have internal predecessors, (109), 4 states have call successors, (28), 2 states have call predecessors, (28), 6 states have return successors, (28), 5 states have call predecessors, (28), 4 states have call successors, (28) [2022-11-02 20:32:22,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:32:22,411 INFO L93 Difference]: Finished difference Result 809 states and 1130 transitions. [2022-11-02 20:32:22,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-02 20:32:22,412 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 9.083333333333334) internal successors, (109), 11 states have internal predecessors, (109), 4 states have call successors, (28), 2 states have call predecessors, (28), 6 states have return successors, (28), 5 states have call predecessors, (28), 4 states have call successors, (28) Word has length 227 [2022-11-02 20:32:22,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:32:22,416 INFO L225 Difference]: With dead ends: 809 [2022-11-02 20:32:22,417 INFO L226 Difference]: Without dead ends: 465 [2022-11-02 20:32:22,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2022-11-02 20:32:22,420 INFO L413 NwaCegarLoop]: 248 mSDtfsCounter, 12 mSDsluCounter, 2881 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 3129 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:32:22,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 3129 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-02 20:32:22,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2022-11-02 20:32:22,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 455. [2022-11-02 20:32:22,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 307 states have (on average 1.1726384364820848) internal successors, (360), 317 states have internal predecessors, (360), 101 states have call successors, (101), 33 states have call predecessors, (101), 46 states have return successors, (166), 104 states have call predecessors, (166), 99 states have call successors, (166) [2022-11-02 20:32:22,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 627 transitions. [2022-11-02 20:32:22,467 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 627 transitions. Word has length 227 [2022-11-02 20:32:22,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:32:22,467 INFO L495 AbstractCegarLoop]: Abstraction has 455 states and 627 transitions. [2022-11-02 20:32:22,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 9.083333333333334) internal successors, (109), 11 states have internal predecessors, (109), 4 states have call successors, (28), 2 states have call predecessors, (28), 6 states have return successors, (28), 5 states have call predecessors, (28), 4 states have call successors, (28) [2022-11-02 20:32:22,468 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 627 transitions. [2022-11-02 20:32:22,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-11-02 20:32:22,470 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:32:22,471 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:32:22,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-02 20:32:22,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-02 20:32:22,689 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:32:22,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:32:22,689 INFO L85 PathProgramCache]: Analyzing trace with hash -297471985, now seen corresponding path program 1 times [2022-11-02 20:32:22,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:32:22,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231151924] [2022-11-02 20:32:22,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:32:22,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:32:22,802 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:32:22,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1589085963] [2022-11-02 20:32:22,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:32:22,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:32:22,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:32:22,804 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:32:22,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-02 20:32:24,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:32:24,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 3063 conjuncts, 102 conjunts are in the unsatisfiable core [2022-11-02 20:32:24,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:32:24,330 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:32:24,331 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 74 treesize of output 56 [2022-11-02 20:32:25,117 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-11-02 20:32:25,127 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-11-02 20:32:25,325 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 127 proven. 6 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-11-02 20:32:25,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:32:26,968 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 36 proven. 6 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2022-11-02 20:32:26,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:32:26,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231151924] [2022-11-02 20:32:26,968 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:32:26,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589085963] [2022-11-02 20:32:26,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589085963] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:32:26,969 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:32:26,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 13] total 31 [2022-11-02 20:32:26,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850347037] [2022-11-02 20:32:26,970 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:32:26,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-02 20:32:26,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:32:26,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-02 20:32:26,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=850, Unknown=0, NotChecked=0, Total=930 [2022-11-02 20:32:26,972 INFO L87 Difference]: Start difference. First operand 455 states and 627 transitions. Second operand has 31 states, 27 states have (on average 5.444444444444445) internal successors, (147), 28 states have internal predecessors, (147), 10 states have call successors, (45), 2 states have call predecessors, (45), 9 states have return successors, (43), 9 states have call predecessors, (43), 10 states have call successors, (43) [2022-11-02 20:32:29,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:32:29,726 INFO L93 Difference]: Finished difference Result 965 states and 1334 transitions. [2022-11-02 20:32:29,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-02 20:32:29,727 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 27 states have (on average 5.444444444444445) internal successors, (147), 28 states have internal predecessors, (147), 10 states have call successors, (45), 2 states have call predecessors, (45), 9 states have return successors, (43), 9 states have call predecessors, (43), 10 states have call successors, (43) Word has length 209 [2022-11-02 20:32:29,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:32:29,731 INFO L225 Difference]: With dead ends: 965 [2022-11-02 20:32:29,731 INFO L226 Difference]: Without dead ends: 537 [2022-11-02 20:32:29,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 397 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=194, Invalid=1876, Unknown=0, NotChecked=0, Total=2070 [2022-11-02 20:32:29,741 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 175 mSDsluCounter, 3464 mSDsCounter, 0 mSdLazyCounter, 1328 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 3661 SdHoareTripleChecker+Invalid, 1372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-02 20:32:29,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 3661 Invalid, 1372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1328 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-02 20:32:29,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2022-11-02 20:32:29,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 475. [2022-11-02 20:32:29,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 327 states have (on average 1.180428134556575) internal successors, (386), 335 states have internal predecessors, (386), 101 states have call successors, (101), 33 states have call predecessors, (101), 46 states have return successors, (166), 106 states have call predecessors, (166), 99 states have call successors, (166) [2022-11-02 20:32:29,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 653 transitions. [2022-11-02 20:32:29,785 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 653 transitions. Word has length 209 [2022-11-02 20:32:29,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:32:29,785 INFO L495 AbstractCegarLoop]: Abstraction has 475 states and 653 transitions. [2022-11-02 20:32:29,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 27 states have (on average 5.444444444444445) internal successors, (147), 28 states have internal predecessors, (147), 10 states have call successors, (45), 2 states have call predecessors, (45), 9 states have return successors, (43), 9 states have call predecessors, (43), 10 states have call successors, (43) [2022-11-02 20:32:29,786 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 653 transitions. [2022-11-02 20:32:29,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-11-02 20:32:29,788 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:32:29,789 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:32:29,846 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-02 20:32:30,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-02 20:32:30,009 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:32:30,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:32:30,010 INFO L85 PathProgramCache]: Analyzing trace with hash -2103736586, now seen corresponding path program 1 times [2022-11-02 20:32:30,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:32:30,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039005904] [2022-11-02 20:32:30,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:32:30,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:32:30,109 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:32:30,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1302516809] [2022-11-02 20:32:30,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:32:30,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:32:30,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:32:30,111 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:32:30,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-02 20:32:30,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:32:30,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 3071 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-02 20:32:30,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:32:31,109 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 140 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-11-02 20:32:31,109 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:32:31,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:32:31,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039005904] [2022-11-02 20:32:31,110 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:32:31,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302516809] [2022-11-02 20:32:31,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302516809] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:32:31,111 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:32:31,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-02 20:32:31,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676107951] [2022-11-02 20:32:31,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:32:31,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-02 20:32:31,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:32:31,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-02 20:32:31,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-11-02 20:32:31,113 INFO L87 Difference]: Start difference. First operand 475 states and 653 transitions. Second operand has 11 states, 11 states have (on average 9.909090909090908) internal successors, (109), 8 states have internal predecessors, (109), 2 states have call successors, (28), 2 states have call predecessors, (28), 5 states have return successors, (27), 5 states have call predecessors, (27), 2 states have call successors, (27) [2022-11-02 20:32:31,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:32:31,302 INFO L93 Difference]: Finished difference Result 933 states and 1287 transitions. [2022-11-02 20:32:31,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-02 20:32:31,303 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 9.909090909090908) internal successors, (109), 8 states have internal predecessors, (109), 2 states have call successors, (28), 2 states have call predecessors, (28), 5 states have return successors, (27), 5 states have call predecessors, (27), 2 states have call successors, (27) Word has length 221 [2022-11-02 20:32:31,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:32:31,306 INFO L225 Difference]: With dead ends: 933 [2022-11-02 20:32:31,307 INFO L226 Difference]: Without dead ends: 497 [2022-11-02 20:32:31,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:32:31,310 INFO L413 NwaCegarLoop]: 253 mSDtfsCounter, 18 mSDsluCounter, 2236 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 2489 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:32:31,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 2489 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:32:31,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2022-11-02 20:32:31,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 479. [2022-11-02 20:32:31,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 331 states have (on average 1.1782477341389728) internal successors, (390), 337 states have internal predecessors, (390), 101 states have call successors, (101), 33 states have call predecessors, (101), 46 states have return successors, (166), 108 states have call predecessors, (166), 99 states have call successors, (166) [2022-11-02 20:32:31,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 657 transitions. [2022-11-02 20:32:31,350 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 657 transitions. Word has length 221 [2022-11-02 20:32:31,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:32:31,351 INFO L495 AbstractCegarLoop]: Abstraction has 479 states and 657 transitions. [2022-11-02 20:32:31,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.909090909090908) internal successors, (109), 8 states have internal predecessors, (109), 2 states have call successors, (28), 2 states have call predecessors, (28), 5 states have return successors, (27), 5 states have call predecessors, (27), 2 states have call successors, (27) [2022-11-02 20:32:31,351 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 657 transitions. [2022-11-02 20:32:31,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-11-02 20:32:31,353 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:32:31,354 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:32:31,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-02 20:32:31,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-02 20:32:31,581 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:32:31,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:32:31,582 INFO L85 PathProgramCache]: Analyzing trace with hash 707191032, now seen corresponding path program 1 times [2022-11-02 20:32:31,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:32:31,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340675130] [2022-11-02 20:32:31,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:32:31,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:32:31,670 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:32:31,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1778185457] [2022-11-02 20:32:31,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:32:31,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:32:31,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:32:31,672 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:32:31,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-02 20:32:32,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:32:32,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 3066 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-02 20:32:32,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:32:32,624 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 133 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-11-02 20:32:32,624 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:32:32,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:32:32,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340675130] [2022-11-02 20:32:32,625 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:32:32,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778185457] [2022-11-02 20:32:32,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778185457] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:32:32,625 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:32:32,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-02 20:32:32,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154793722] [2022-11-02 20:32:32,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:32:32,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:32:32,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:32:32,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:32:32,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:32:32,628 INFO L87 Difference]: Start difference. First operand 479 states and 657 transitions. Second operand has 10 states, 9 states have (on average 10.444444444444445) internal successors, (94), 8 states have internal predecessors, (94), 3 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) [2022-11-02 20:32:32,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:32:32,900 INFO L93 Difference]: Finished difference Result 727 states and 989 transitions. [2022-11-02 20:32:32,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 20:32:32,901 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 10.444444444444445) internal successors, (94), 8 states have internal predecessors, (94), 3 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) Word has length 209 [2022-11-02 20:32:32,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:32:32,905 INFO L225 Difference]: With dead ends: 727 [2022-11-02 20:32:32,905 INFO L226 Difference]: Without dead ends: 493 [2022-11-02 20:32:32,907 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-11-02 20:32:32,908 INFO L413 NwaCegarLoop]: 228 mSDtfsCounter, 4 mSDsluCounter, 1782 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 2010 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:32:32,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 2010 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:32:32,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2022-11-02 20:32:32,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 486. [2022-11-02 20:32:32,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 336 states have (on average 1.1755952380952381) internal successors, (395), 343 states have internal predecessors, (395), 101 states have call successors, (101), 33 states have call predecessors, (101), 48 states have return successors, (168), 109 states have call predecessors, (168), 99 states have call successors, (168) [2022-11-02 20:32:32,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 664 transitions. [2022-11-02 20:32:32,950 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 664 transitions. Word has length 209 [2022-11-02 20:32:32,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:32:32,951 INFO L495 AbstractCegarLoop]: Abstraction has 486 states and 664 transitions. [2022-11-02 20:32:32,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 10.444444444444445) internal successors, (94), 8 states have internal predecessors, (94), 3 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) [2022-11-02 20:32:32,952 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 664 transitions. [2022-11-02 20:32:32,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-11-02 20:32:32,954 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:32:32,954 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:32:33,001 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-02 20:32:33,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-02 20:32:33,169 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:32:33,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:32:33,170 INFO L85 PathProgramCache]: Analyzing trace with hash -268648195, now seen corresponding path program 1 times [2022-11-02 20:32:33,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:32:33,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352034389] [2022-11-02 20:32:33,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:32:33,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:32:33,262 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:32:33,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [347794435] [2022-11-02 20:32:33,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:32:33,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:32:33,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:32:33,264 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:32:33,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-02 20:32:33,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:32:34,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 3078 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:32:34,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:32:34,085 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-11-02 20:32:34,086 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:32:34,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:32:34,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352034389] [2022-11-02 20:32:34,086 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:32:34,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347794435] [2022-11-02 20:32:34,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347794435] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:32:34,087 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:32:34,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:32:34,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421902109] [2022-11-02 20:32:34,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:32:34,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:32:34,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:32:34,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:32:34,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:32:34,089 INFO L87 Difference]: Start difference. First operand 486 states and 664 transitions. Second operand has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-11-02 20:32:34,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:32:34,523 INFO L93 Difference]: Finished difference Result 953 states and 1380 transitions. [2022-11-02 20:32:34,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:32:34,525 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 211 [2022-11-02 20:32:34,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:32:34,530 INFO L225 Difference]: With dead ends: 953 [2022-11-02 20:32:34,531 INFO L226 Difference]: Without dead ends: 506 [2022-11-02 20:32:34,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:32:34,536 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 7 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 895 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:32:34,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 895 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 20:32:34,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2022-11-02 20:32:34,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 490. [2022-11-02 20:32:34,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 340 states have (on average 1.173529411764706) internal successors, (399), 347 states have internal predecessors, (399), 101 states have call successors, (101), 33 states have call predecessors, (101), 48 states have return successors, (168), 109 states have call predecessors, (168), 99 states have call successors, (168) [2022-11-02 20:32:34,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 668 transitions. [2022-11-02 20:32:34,623 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 668 transitions. Word has length 211 [2022-11-02 20:32:34,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:32:34,623 INFO L495 AbstractCegarLoop]: Abstraction has 490 states and 668 transitions. [2022-11-02 20:32:34,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-11-02 20:32:34,624 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 668 transitions. [2022-11-02 20:32:34,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-11-02 20:32:34,627 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:32:34,628 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:32:34,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-02 20:32:34,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:32:34,853 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:32:34,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:32:34,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1733238075, now seen corresponding path program 1 times [2022-11-02 20:32:34,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:32:34,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578582596] [2022-11-02 20:32:34,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:32:34,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:32:34,981 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:32:34,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [457595322] [2022-11-02 20:32:34,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:32:34,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:32:34,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:32:34,983 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:32:34,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-02 20:32:35,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:32:35,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 3083 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-02 20:32:35,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:32:38,303 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2925 Int) (|aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| Int) (v_ArrVal_2924 Int)) (and (= (store |c_old(#memory_$Pointer$.base)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_$Pointer$.base)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) |c_aws_mul_size_checked_#in~r#1.offset| v_ArrVal_2924)) |c_#memory_$Pointer$.base|) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_$Pointer$.offset)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) |c_aws_mul_size_checked_#in~r#1.offset| v_ArrVal_2925))))) is different from true [2022-11-02 20:32:40,330 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2925 Int) (|aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| Int) (v_ArrVal_2924 Int)) (and (= (store |c_old(#memory_$Pointer$.base)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_$Pointer$.base)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) 0 v_ArrVal_2924)) |c_#memory_$Pointer$.base|) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_$Pointer$.offset)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) 0 v_ArrVal_2925))))) is different from true [2022-11-02 20:32:40,419 INFO L356 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-02 20:32:40,420 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 30 [2022-11-02 20:32:40,447 INFO L356 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-02 20:32:40,448 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 30 [2022-11-02 20:32:40,788 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-02 20:32:40,788 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 30 treesize of output 10 [2022-11-02 20:32:40,797 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-02 20:32:40,797 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 30 treesize of output 10 [2022-11-02 20:32:40,902 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 159 proven. 6 refuted. 0 times theorem prover too weak. 73 trivial. 7 not checked. [2022-11-02 20:32:40,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:32:43,115 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse6 (+ 40 |c_ULTIMATE.start_aws_priority_queue_top_harness_~#queue~0#1.offset|))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_aws_priority_queue_top_harness_~#queue~0#1.base|) .cse6)) (.cse2 (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_aws_priority_queue_top_harness_~#queue~0#1.base|) .cse6))) (and (forall ((|v_ULTIMATE.start_aws_priority_queue_top_harness_~#old_container~0#1.base_9| Int) (|v_ULTIMATE.start_aws_priority_queue_top_harness_~#old_container~0#1.offset_9| Int)) (let ((.cse1 (+ 32 |v_ULTIMATE.start_aws_priority_queue_top_harness_~#old_container~0#1.offset_9|))) (let ((.cse3 (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_priority_queue_top_harness_~#old_container~0#1.base_9|) .cse1))) (or (not (= .cse0 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_priority_queue_top_harness_~#old_container~0#1.base_9|) .cse1))) (not (= .cse2 .cse3)) (= 0 .cse3))))) (forall ((|v_ULTIMATE.start_aws_priority_queue_top_harness_~#old_container~0#1.base_9| Int) (|v_ULTIMATE.start_aws_priority_queue_top_harness_~#old_container~0#1.offset_9| Int)) (let ((.cse5 (+ 32 |v_ULTIMATE.start_aws_priority_queue_top_harness_~#old_container~0#1.offset_9|))) (let ((.cse4 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_priority_queue_top_harness_~#old_container~0#1.base_9|) .cse5))) (or (not (= .cse0 .cse4)) (= .cse4 0) (not (= .cse2 (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_priority_queue_top_harness_~#old_container~0#1.base_9|) .cse5)))))))))) is different from false [2022-11-02 20:32:43,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:32:43,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578582596] [2022-11-02 20:32:43,142 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:32:43,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457595322] [2022-11-02 20:32:43,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457595322] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:32:43,142 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:32:43,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-11-02 20:32:43,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252541992] [2022-11-02 20:32:43,143 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-02 20:32:43,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-02 20:32:43,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:32:43,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-02 20:32:43,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=303, Unknown=3, NotChecked=108, Total=462 [2022-11-02 20:32:43,145 INFO L87 Difference]: Start difference. First operand 490 states and 668 transitions. Second operand has 20 states, 18 states have (on average 6.0) internal successors, (108), 19 states have internal predecessors, (108), 11 states have call successors, (28), 4 states have call predecessors, (28), 8 states have return successors, (26), 10 states have call predecessors, (26), 11 states have call successors, (26) [2022-11-02 20:33:02,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:33:02,502 INFO L93 Difference]: Finished difference Result 1042 states and 1419 transitions. [2022-11-02 20:33:02,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-02 20:33:02,503 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 6.0) internal successors, (108), 19 states have internal predecessors, (108), 11 states have call successors, (28), 4 states have call predecessors, (28), 8 states have return successors, (26), 10 states have call predecessors, (26), 11 states have call successors, (26) Word has length 211 [2022-11-02 20:33:02,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:33:02,511 INFO L225 Difference]: With dead ends: 1042 [2022-11-02 20:33:02,511 INFO L226 Difference]: Without dead ends: 811 [2022-11-02 20:33:02,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 282 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 23.1s TimeCoverageRelationStatistics Valid=156, Invalid=1106, Unknown=10, NotChecked=210, Total=1482 [2022-11-02 20:33:02,514 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 292 mSDsluCounter, 1461 mSDsCounter, 0 mSdLazyCounter, 2301 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 1678 SdHoareTripleChecker+Invalid, 3455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 2301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1036 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:33:02,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [347 Valid, 1678 Invalid, 3455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 2301 Invalid, 0 Unknown, 1036 Unchecked, 2.5s Time] [2022-11-02 20:33:02,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2022-11-02 20:33:02,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 540. [2022-11-02 20:33:02,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 380 states have (on average 1.168421052631579) internal successors, (444), 388 states have internal predecessors, (444), 106 states have call successors, (106), 35 states have call predecessors, (106), 53 states have return successors, (188), 116 states have call predecessors, (188), 104 states have call successors, (188) [2022-11-02 20:33:02,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 738 transitions. [2022-11-02 20:33:02,580 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 738 transitions. Word has length 211 [2022-11-02 20:33:02,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:33:02,581 INFO L495 AbstractCegarLoop]: Abstraction has 540 states and 738 transitions. [2022-11-02 20:33:02,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 6.0) internal successors, (108), 19 states have internal predecessors, (108), 11 states have call successors, (28), 4 states have call predecessors, (28), 8 states have return successors, (26), 10 states have call predecessors, (26), 11 states have call successors, (26) [2022-11-02 20:33:02,581 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 738 transitions. [2022-11-02 20:33:02,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2022-11-02 20:33:02,584 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:33:02,584 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:33:02,632 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-11-02 20:33:02,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:33:02,801 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:33:02,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:33:02,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1763338631, now seen corresponding path program 1 times [2022-11-02 20:33:02,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:33:02,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072795617] [2022-11-02 20:33:02,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:33:02,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:33:02,895 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:33:02,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [476424847] [2022-11-02 20:33:02,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:33:02,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:33:02,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:33:02,897 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:33:02,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-02 20:33:03,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:33:03,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 3087 conjuncts, 81 conjunts are in the unsatisfiable core [2022-11-02 20:33:03,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:33:04,265 WARN L855 $PredicateComparison]: unable to prove that (exists ((|aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| Int)) (and (exists ((v_ArrVal_3128 (Array Int Int))) (= (store |c_old(#memory_$Pointer$.offset)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| v_ArrVal_3128) |c_#memory_$Pointer$.offset|)) (exists ((v_ArrVal_3127 (Array Int Int))) (= (store |c_old(#memory_$Pointer$.base)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| v_ArrVal_3127) |c_#memory_$Pointer$.base|)))) is different from true [2022-11-02 20:33:04,638 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-02 20:33:04,639 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-02 20:33:04,665 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-02 20:33:04,666 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-02 20:33:04,675 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-02 20:33:04,681 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-02 20:33:04,751 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2022-11-02 20:33:04,819 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 146 proven. 6 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2022-11-02 20:33:04,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:33:07,110 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse6 (+ 40 |c_ULTIMATE.start_aws_priority_queue_top_harness_~#queue~0#1.offset|))) (let ((.cse0 (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_aws_priority_queue_top_harness_~#queue~0#1.base|) .cse6)) (.cse2 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_aws_priority_queue_top_harness_~#queue~0#1.base|) .cse6))) (and (forall ((|v_ULTIMATE.start_aws_priority_queue_top_harness_~#old_container~0#1.offset_10| Int) (|v_ULTIMATE.start_aws_priority_queue_top_harness_~#old_container~0#1.base_10| Int)) (let ((.cse1 (+ 32 |v_ULTIMATE.start_aws_priority_queue_top_harness_~#old_container~0#1.offset_10|))) (let ((.cse3 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_priority_queue_top_harness_~#old_container~0#1.base_10|) .cse1))) (or (not (= .cse0 (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_priority_queue_top_harness_~#old_container~0#1.base_10|) .cse1))) (not (= .cse2 .cse3)) (= .cse3 0))))) (forall ((|v_ULTIMATE.start_aws_priority_queue_top_harness_~#old_container~0#1.offset_10| Int) (|v_ULTIMATE.start_aws_priority_queue_top_harness_~#old_container~0#1.base_10| Int)) (let ((.cse5 (+ 32 |v_ULTIMATE.start_aws_priority_queue_top_harness_~#old_container~0#1.offset_10|))) (let ((.cse4 (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_priority_queue_top_harness_~#old_container~0#1.base_10|) .cse5))) (or (not (= .cse0 .cse4)) (not (= .cse2 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_priority_queue_top_harness_~#old_container~0#1.base_10|) .cse5))) (= .cse4 0)))))))) is different from false [2022-11-02 20:33:07,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:33:07,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072795617] [2022-11-02 20:33:07,142 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:33:07,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476424847] [2022-11-02 20:33:07,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476424847] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:33:07,143 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:33:07,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2022-11-02 20:33:07,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325546264] [2022-11-02 20:33:07,143 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-02 20:33:07,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-02 20:33:07,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:33:07,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-02 20:33:07,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=361, Unknown=19, NotChecked=78, Total=506 [2022-11-02 20:33:07,146 INFO L87 Difference]: Start difference. First operand 540 states and 738 transitions. Second operand has 19 states, 19 states have (on average 5.684210526315789) internal successors, (108), 17 states have internal predecessors, (108), 8 states have call successors, (29), 3 states have call predecessors, (29), 5 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) [2022-11-02 20:33:10,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:33:10,893 INFO L93 Difference]: Finished difference Result 1226 states and 1689 transitions. [2022-11-02 20:33:10,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-02 20:33:10,895 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.684210526315789) internal successors, (108), 17 states have internal predecessors, (108), 8 states have call successors, (29), 3 states have call predecessors, (29), 5 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) Word has length 217 [2022-11-02 20:33:10,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:33:10,900 INFO L225 Difference]: With dead ends: 1226 [2022-11-02 20:33:10,901 INFO L226 Difference]: Without dead ends: 739 [2022-11-02 20:33:10,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=227, Invalid=1626, Unknown=47, NotChecked=170, Total=2070 [2022-11-02 20:33:10,905 INFO L413 NwaCegarLoop]: 248 mSDtfsCounter, 223 mSDsluCounter, 1610 mSDsCounter, 0 mSdLazyCounter, 1996 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 1858 SdHoareTripleChecker+Invalid, 2996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 907 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:33:10,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 1858 Invalid, 2996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1996 Invalid, 0 Unknown, 907 Unchecked, 2.4s Time] [2022-11-02 20:33:10,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2022-11-02 20:33:10,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 552. [2022-11-02 20:33:10,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 390 states have (on average 1.1692307692307693) internal successors, (456), 398 states have internal predecessors, (456), 106 states have call successors, (106), 35 states have call predecessors, (106), 55 states have return successors, (208), 118 states have call predecessors, (208), 104 states have call successors, (208) [2022-11-02 20:33:10,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 770 transitions. [2022-11-02 20:33:10,969 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 770 transitions. Word has length 217 [2022-11-02 20:33:10,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:33:10,969 INFO L495 AbstractCegarLoop]: Abstraction has 552 states and 770 transitions. [2022-11-02 20:33:10,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.684210526315789) internal successors, (108), 17 states have internal predecessors, (108), 8 states have call successors, (29), 3 states have call predecessors, (29), 5 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) [2022-11-02 20:33:10,970 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 770 transitions. [2022-11-02 20:33:10,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2022-11-02 20:33:10,973 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:33:10,973 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:33:11,032 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-02 20:33:11,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:33:11,201 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:33:11,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:33:11,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1438993463, now seen corresponding path program 1 times [2022-11-02 20:33:11,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:33:11,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524408027] [2022-11-02 20:33:11,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:33:11,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:33:11,301 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:33:11,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1071377995] [2022-11-02 20:33:11,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:33:11,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:33:11,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:33:11,303 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:33:11,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-02 20:33:12,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:33:12,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 3092 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:33:12,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:33:12,335 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-11-02 20:33:12,336 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:33:12,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:33:12,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524408027] [2022-11-02 20:33:12,336 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:33:12,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071377995] [2022-11-02 20:33:12,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071377995] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:33:12,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:33:12,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:33:12,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553429009] [2022-11-02 20:33:12,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:33:12,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:33:12,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:33:12,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:33:12,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:33:12,340 INFO L87 Difference]: Start difference. First operand 552 states and 770 transitions. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-11-02 20:33:12,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:33:12,697 INFO L93 Difference]: Finished difference Result 1062 states and 1537 transitions. [2022-11-02 20:33:12,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:33:12,698 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 217 [2022-11-02 20:33:12,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:33:12,705 INFO L225 Difference]: With dead ends: 1062 [2022-11-02 20:33:12,705 INFO L226 Difference]: Without dead ends: 556 [2022-11-02 20:33:12,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:33:12,709 INFO L413 NwaCegarLoop]: 239 mSDtfsCounter, 13 mSDsluCounter, 635 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 874 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:33:12,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 874 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 20:33:12,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2022-11-02 20:33:12,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 548. [2022-11-02 20:33:12,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 387 states have (on average 1.1602067183462532) internal successors, (449), 394 states have internal predecessors, (449), 106 states have call successors, (106), 35 states have call predecessors, (106), 54 states have return successors, (198), 118 states have call predecessors, (198), 104 states have call successors, (198) [2022-11-02 20:33:12,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 753 transitions. [2022-11-02 20:33:12,772 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 753 transitions. Word has length 217 [2022-11-02 20:33:12,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:33:12,773 INFO L495 AbstractCegarLoop]: Abstraction has 548 states and 753 transitions. [2022-11-02 20:33:12,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-11-02 20:33:12,774 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 753 transitions. [2022-11-02 20:33:12,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-11-02 20:33:12,776 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:33:12,777 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:33:12,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-02 20:33:13,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:33:13,005 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:33:13,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:33:13,006 INFO L85 PathProgramCache]: Analyzing trace with hash -2007524191, now seen corresponding path program 2 times [2022-11-02 20:33:13,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:33:13,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038446493] [2022-11-02 20:33:13,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:33:13,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:33:13,121 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:33:13,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [979887116] [2022-11-02 20:33:13,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:33:13,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:33:13,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:33:13,126 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:33:13,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8dc41-6654-4330-b953-6e7acb1b6b8d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-02 20:33:15,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:33:15,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:33:15,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 3088 conjuncts, 142 conjunts are in the unsatisfiable core [2022-11-02 20:33:15,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:33:29,258 WARN L234 SmtUtils]: Spent 5.21s on a formula simplification that was a NOOP. DAG size: 32 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-02 20:33:29,268 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-02 20:33:29,274 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-02 20:33:29,279 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-02 20:34:13,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:34:13,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:34:13,492 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 39 [2022-11-02 20:34:13,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:34:13,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:34:13,508 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 39 [2022-11-02 20:34:13,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:34:13,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:34:13,525 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2022-11-02 20:34:13,558 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-02 20:34:13,559 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 40 treesize of output 20 [2022-11-02 20:34:13,572 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-02 20:34:13,572 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 36 treesize of output 16 [2022-11-02 20:34:13,961 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 159 proven. 8 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-02 20:34:13,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:34:19,550 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse3 (+ 56 |c_ULTIMATE.start_aws_priority_queue_top_harness_~#queue~0#1.offset|)) (.cse6 (+ |c_ULTIMATE.start_aws_priority_queue_top_harness_~#queue~0#1.offset| 80)) (.cse4 (+ |c_ULTIMATE.start_aws_priority_queue_top_harness_~#old_byte_container~0#1.offset| 8))) (and (forall ((|v_ULTIMATE.start_aws_priority_queue_top_harness_~#old_backpointers~0#1.offset_12| Int) (v_ArrVal_3579 Int) (v_ArrVal_3577 Int) (v_ArrVal_3578 Int) (v_ArrVal_3575 Int) (v_ArrVal_3576 Int) (|v_ULTIMATE.start_aws_priority_queue_top_harness_~#old_backpointers~0#1.base_12| Int) (|v_save_byte_from_array_~storage#1.base_46| Int) (v_ArrVal_3580 Int)) (let ((.cse7 (store |c_#memory_$Pointer$.offset| |v_save_byte_from_array_~storage#1.base_46| (store (store (select |c_#memory_$Pointer$.offset| |v_save_byte_from_array_~storage#1.base_46|) |c_ULTIMATE.start_aws_priority_queue_top_harness_~#old_byte_container~0#1.offset| v_ArrVal_3578) .cse4 v_ArrVal_3577))) (.cse5 (store |c_#memory_$Pointer$.base| |v_save_byte_from_array_~storage#1.base_46| (store (store (select |c_#memory_$Pointer$.base| |v_save_byte_from_array_~storage#1.base_46|) |c_ULTIMATE.start_aws_priority_queue_top_harness_~#old_byte_container~0#1.offset| v_ArrVal_3576) .cse4 v_ArrVal_3580))) (.cse8 (+ 32 |v_ULTIMATE.start_aws_priority_queue_top_harness_~#old_backpointers~0#1.offset_12|))) (let ((.cse1 (select (select .cse5 |v_ULTIMATE.start_aws_priority_queue_top_harness_~#old_backpointers~0#1.base_12|) .cse8)) (.cse0 (select (select .cse7 |v_ULTIMATE.start_aws_priority_queue_top_harness_~#old_backpointers~0#1.base_12|) .cse8))) (or (not (= .cse0 0)) (not (= .cse1 0)) (not (let ((.cse2 (store |c_#memory_int| |v_save_byte_from_array_~storage#1.base_46| (store (store (select |c_#memory_int| |v_save_byte_from_array_~storage#1.base_46|) |c_ULTIMATE.start_aws_priority_queue_top_harness_~#old_byte_container~0#1.offset| v_ArrVal_3575) .cse4 v_ArrVal_3579)))) (= (select (select .cse2 |v_ULTIMATE.start_aws_priority_queue_top_harness_~#old_backpointers~0#1.base_12|) (+ 8 |v_ULTIMATE.start_aws_priority_queue_top_harness_~#old_backpointers~0#1.offset_12|)) (select (select .cse2 |c_ULTIMATE.start_aws_priority_queue_top_harness_~#queue~0#1.base|) .cse3)))) (not (= (select (select .cse5 |c_ULTIMATE.start_aws_priority_queue_top_harness_~#queue~0#1.base|) .cse6) .cse1)) (not (= (select (select .cse7 |c_ULTIMATE.start_aws_priority_queue_top_harness_~#queue~0#1.base|) .cse6) .cse0)))))) (or (forall ((|v_ULTIMATE.start_aws_priority_queue_top_harness_~#old_backpointers~0#1.offset_12| Int) (v_ArrVal_3579 Int) (v_ArrVal_3577 Int) (v_ArrVal_3578 Int) (v_ArrVal_3575 Int) (v_ArrVal_3576 Int) (|v_ULTIMATE.start_aws_priority_queue_top_harness_~#old_backpointers~0#1.base_12| Int) (|v_save_byte_from_array_~storage#1.base_46| Int) (v_ArrVal_3580 Int)) (let ((.cse11 (+ 32 |v_ULTIMATE.start_aws_priority_queue_top_harness_~#old_backpointers~0#1.offset_12|))) (or (not (let ((.cse9 (store |c_#memory_int| |v_save_byte_from_array_~storage#1.base_46| (store (store (select |c_#memory_int| |v_save_byte_from_array_~storage#1.base_46|) |c_ULTIMATE.start_aws_priority_queue_top_harness_~#old_byte_container~0#1.offset| v_ArrVal_3575) .cse4 v_ArrVal_3579)))) (= (select (select .cse9 |v_ULTIMATE.start_aws_priority_queue_top_harness_~#old_backpointers~0#1.base_12|) (+ 8 |v_ULTIMATE.start_aws_priority_queue_top_harness_~#old_backpointers~0#1.offset_12|)) (select (select .cse9 |c_ULTIMATE.start_aws_priority_queue_top_harness_~#queue~0#1.base|) .cse3)))) (not (let ((.cse10 (store |c_#memory_$Pointer$.base| |v_save_byte_from_array_~storage#1.base_46| (store (store (select |c_#memory_$Pointer$.base| |v_save_byte_from_array_~storage#1.base_46|) |c_ULTIMATE.start_aws_priority_queue_top_harness_~#old_byte_container~0#1.offset| v_ArrVal_3576) .cse4 v_ArrVal_3580)))) (= (select (select .cse10 |c_ULTIMATE.start_aws_priority_queue_top_harness_~#queue~0#1.base|) .cse6) (select (select .cse10 |v_ULTIMATE.start_aws_priority_queue_top_harness_~#old_backpointers~0#1.base_12|) .cse11)))) (not (let ((.cse12 (store |c_#memory_$Pointer$.offset| |v_save_byte_from_array_~storage#1.base_46| (store (store (select |c_#memory_$Pointer$.offset| |v_save_byte_from_array_~storage#1.base_46|) |c_ULTIMATE.start_aws_priority_queue_top_harness_~#old_byte_container~0#1.offset| v_ArrVal_3578) .cse4 v_ArrVal_3577)))) (= (select (select .cse12 |c_ULTIMATE.start_aws_priority_queue_top_harness_~#queue~0#1.base|) .cse6) (select (select .cse12 |v_ULTIMATE.start_aws_priority_queue_top_harness_~#old_backpointers~0#1.base_12|) .cse11))))))) (< 0 (+ |c_#StackHeapBarrier| 1))) (forall ((|v_ULTIMATE.start_aws_priority_queue_top_harness_~#old_backpointers~0#1.offset_12| Int) (v_ArrVal_3579 Int) (v_ArrVal_3577 Int) (v_ArrVal_3578 Int) (v_ArrVal_3575 Int) (v_ArrVal_3576 Int) (|v_ULTIMATE.start_aws_priority_queue_top_harness_~#old_backpointers~0#1.base_12| Int) (|v_save_byte_from_array_~storage#1.base_46| Int) (v_ArrVal_3580 Int)) (let ((.cse14 (store |c_#memory_int| |v_save_byte_from_array_~storage#1.base_46| (store (store (select |c_#memory_int| |v_save_byte_from_array_~storage#1.base_46|) |c_ULTIMATE.start_aws_priority_queue_top_harness_~#old_byte_container~0#1.offset| v_ArrVal_3575) .cse4 v_ArrVal_3579)))) (let ((.cse16 (+ 32 |v_ULTIMATE.start_aws_priority_queue_top_harness_~#old_backpointers~0#1.offset_12|)) (.cse13 (select (select .cse14 |v_ULTIMATE.start_aws_priority_queue_top_harness_~#old_backpointers~0#1.base_12|) (+ 8 |v_ULTIMATE.start_aws_priority_queue_top_harness_~#old_backpointers~0#1.offset_12|)))) (or (not (= .cse13 (select (select .cse14 |c_ULTIMATE.start_aws_priority_queue_top_harness_~#queue~0#1.base|) .cse3))) (not (let ((.cse15 (store |c_#memory_$Pointer$.base| |v_save_byte_from_array_~storage#1.base_46| (store (store (select |c_#memory_$Pointer$.base| |v_save_byte_from_array_~storage#1.base_46|) |c_ULTIMATE.start_aws_priority_queue_top_harness_~#old_byte_container~0#1.offset| v_ArrVal_3576) .cse4 v_ArrVal_3580)))) (= (select (select .cse15 |c_ULTIMATE.start_aws_priority_queue_top_harness_~#queue~0#1.base|) .cse6) (select (select .cse15 |v_ULTIMATE.start_aws_priority_queue_top_harness_~#old_backpointers~0#1.base_12|) .cse16)))) (not (let ((.cse17 (store |c_#memory_$Pointer$.offset| |v_save_byte_from_array_~storage#1.base_46| (store (store (select |c_#memory_$Pointer$.offset| |v_save_byte_from_array_~storage#1.base_46|) |c_ULTIMATE.start_aws_priority_queue_top_harness_~#old_byte_container~0#1.offset| v_ArrVal_3578) .cse4 v_ArrVal_3577)))) (= (select (select .cse17 |c_ULTIMATE.start_aws_priority_queue_top_harness_~#queue~0#1.base|) .cse6) (select (select .cse17 |v_ULTIMATE.start_aws_priority_queue_top_harness_~#old_backpointers~0#1.base_12|) .cse16)))) (< 0 (mod .cse13 18446744073709551616)))))))) is different from false [2022-11-02 20:34:19,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:34:19,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038446493] [2022-11-02 20:34:19,558 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:34:19,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979887116] [2022-11-02 20:34:19,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979887116] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:34:19,558 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:34:19,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2022-11-02 20:34:19,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099758029] [2022-11-02 20:34:19,559 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-02 20:34:19,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-02 20:34:19,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:34:19,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-02 20:34:19,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1194, Unknown=24, NotChecked=70, Total=1406 [2022-11-02 20:34:19,561 INFO L87 Difference]: Start difference. First operand 548 states and 753 transitions. Second operand has 27 states, 25 states have (on average 4.24) internal successors, (106), 22 states have internal predecessors, (106), 10 states have call successors, (27), 5 states have call predecessors, (27), 7 states have return successors, (25), 8 states have call predecessors, (25), 10 states have call successors, (25)