./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_priority_queue_size_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2c32644-d250-4875-8c56-c1352b68dc4d/bin/uautomizer-J5u9QxTXDZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2c32644-d250-4875-8c56-c1352b68dc4d/bin/uautomizer-J5u9QxTXDZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2c32644-d250-4875-8c56-c1352b68dc4d/bin/uautomizer-J5u9QxTXDZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2c32644-d250-4875-8c56-c1352b68dc4d/bin/uautomizer-J5u9QxTXDZ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_priority_queue_size_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2c32644-d250-4875-8c56-c1352b68dc4d/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2c32644-d250-4875-8c56-c1352b68dc4d/bin/uautomizer-J5u9QxTXDZ --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 1baae56bade188786b6c048f5a5545dd6165460ea50e58a0310e4360c89d1838 --- 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-dbf71c6-m [2022-10-17 11:04:22,582 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 11:04:22,587 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 11:04:22,617 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 11:04:22,617 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 11:04:22,618 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 11:04:22,620 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 11:04:22,622 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 11:04:22,624 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 11:04:22,625 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 11:04:22,626 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 11:04:22,628 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 11:04:22,628 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 11:04:22,629 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 11:04:22,631 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 11:04:22,632 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 11:04:22,633 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 11:04:22,634 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 11:04:22,636 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 11:04:22,638 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 11:04:22,640 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 11:04:22,645 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 11:04:22,646 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 11:04:22,647 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 11:04:22,652 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 11:04:22,652 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 11:04:22,653 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 11:04:22,654 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 11:04:22,655 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 11:04:22,663 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 11:04:22,664 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 11:04:22,665 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 11:04:22,667 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 11:04:22,668 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 11:04:22,669 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 11:04:22,669 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 11:04:22,670 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 11:04:22,670 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 11:04:22,670 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 11:04:22,671 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 11:04:22,672 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 11:04:22,672 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2c32644-d250-4875-8c56-c1352b68dc4d/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-10-17 11:04:22,722 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 11:04:22,722 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 11:04:22,722 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 11:04:22,723 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 11:04:22,723 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 11:04:22,723 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 11:04:22,724 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 11:04:22,724 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 11:04:22,724 INFO L138 SettingsManager]: * Use SBE=true [2022-10-17 11:04:22,728 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 11:04:22,729 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 11:04:22,729 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 11:04:22,729 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 11:04:22,729 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 11:04:22,730 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 11:04:22,730 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 11:04:22,730 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 11:04:22,730 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 11:04:22,730 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 11:04:22,731 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 11:04:22,731 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 11:04:22,731 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 11:04:22,731 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 11:04:22,732 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 11:04:22,732 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 11:04:22,732 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-17 11:04:22,734 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 11:04:22,734 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-10-17 11:04:22,734 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-10-17 11:04:22,734 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 11:04:22,734 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_f2c32644-d250-4875-8c56-c1352b68dc4d/bin/uautomizer-J5u9QxTXDZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2c32644-d250-4875-8c56-c1352b68dc4d/bin/uautomizer-J5u9QxTXDZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1baae56bade188786b6c048f5a5545dd6165460ea50e58a0310e4360c89d1838 [2022-10-17 11:04:23,001 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 11:04:23,032 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 11:04:23,035 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 11:04:23,036 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 11:04:23,038 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 11:04:23,039 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2c32644-d250-4875-8c56-c1352b68dc4d/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/aws-c-common/aws_priority_queue_size_harness.i [2022-10-17 11:04:23,121 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2c32644-d250-4875-8c56-c1352b68dc4d/bin/uautomizer-J5u9QxTXDZ/data/0f2f6c265/1eb2bc50ec4642d2982f83895f0227f1/FLAGe9c26de60 [2022-10-17 11:04:24,030 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 11:04:24,031 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2c32644-d250-4875-8c56-c1352b68dc4d/sv-benchmarks/c/aws-c-common/aws_priority_queue_size_harness.i [2022-10-17 11:04:24,076 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2c32644-d250-4875-8c56-c1352b68dc4d/bin/uautomizer-J5u9QxTXDZ/data/0f2f6c265/1eb2bc50ec4642d2982f83895f0227f1/FLAGe9c26de60 [2022-10-17 11:04:24,502 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2c32644-d250-4875-8c56-c1352b68dc4d/bin/uautomizer-J5u9QxTXDZ/data/0f2f6c265/1eb2bc50ec4642d2982f83895f0227f1 [2022-10-17 11:04:24,506 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 11:04:24,507 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 11:04:24,511 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 11:04:24,512 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 11:04:24,515 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 11:04:24,516 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 11:04:24" (1/1) ... [2022-10-17 11:04:24,517 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28ba4cfa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:04:24, skipping insertion in model container [2022-10-17 11:04:24,517 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 11:04:24" (1/1) ... [2022-10-17 11:04:24,524 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 11:04:24,660 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 11:04:24,936 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_f2c32644-d250-4875-8c56-c1352b68dc4d/sv-benchmarks/c/aws-c-common/aws_priority_queue_size_harness.i[4497,4510] [2022-10-17 11:04:24,942 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2c32644-d250-4875-8c56-c1352b68dc4d/sv-benchmarks/c/aws-c-common/aws_priority_queue_size_harness.i[4557,4570] [2022-10-17 11:04:25,736 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-10-17 11:04:25,849 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 11:04:25,852 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 11:04:25,854 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 11:04:25,855 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 11:04:25,857 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 11:04:25,876 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 11:04:25,880 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 11:04:25,883 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 11:04:25,884 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 11:04:26,222 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-10-17 11:04:26,223 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-10-17 11:04:26,224 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-10-17 11:04:26,225 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-10-17 11:04:26,227 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-10-17 11:04:26,227 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-10-17 11:04:26,228 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-10-17 11:04:26,229 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-10-17 11:04:26,229 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-10-17 11:04:26,230 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-10-17 11:04:26,372 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 11:04:26,372 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 11:04:26,470 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 11:04:26,550 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 11:04:26,576 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_f2c32644-d250-4875-8c56-c1352b68dc4d/sv-benchmarks/c/aws-c-common/aws_priority_queue_size_harness.i[4497,4510] [2022-10-17 11:04:26,583 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_f2c32644-d250-4875-8c56-c1352b68dc4d/sv-benchmarks/c/aws-c-common/aws_priority_queue_size_harness.i[4557,4570] [2022-10-17 11:04:26,642 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-10-17 11:04:26,676 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 11:04:26,677 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 11:04:26,677 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 11:04:26,683 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 11:04:26,684 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 11:04:26,690 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 11:04:26,695 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 11:04:26,696 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 11:04:26,696 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 11:04:26,728 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-10-17 11:04:26,729 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-10-17 11:04:26,730 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-10-17 11:04:26,731 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-10-17 11:04:26,732 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-10-17 11:04:26,732 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-10-17 11:04:26,733 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-10-17 11:04:26,733 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-10-17 11:04:26,734 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-10-17 11:04:26,734 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-10-17 11:04:26,760 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 11:04:26,760 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 11:04:26,785 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 11:04:27,033 INFO L208 MainTranslator]: Completed translation [2022-10-17 11:04:27,034 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:04:27 WrapperNode [2022-10-17 11:04:27,034 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 11:04:27,035 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 11:04:27,036 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 11:04:27,036 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 11:04:27,046 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:04:27" (1/1) ... [2022-10-17 11:04:27,167 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:04:27" (1/1) ... [2022-10-17 11:04:27,280 INFO L138 Inliner]: procedures = 689, calls = 1531, calls flagged for inlining = 55, calls inlined = 10, statements flattened = 667 [2022-10-17 11:04:27,281 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 11:04:27,282 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 11:04:27,282 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 11:04:27,282 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 11:04:27,298 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:04:27" (1/1) ... [2022-10-17 11:04:27,298 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:04:27" (1/1) ... [2022-10-17 11:04:27,320 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:04:27" (1/1) ... [2022-10-17 11:04:27,323 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:04:27" (1/1) ... [2022-10-17 11:04:27,363 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:04:27" (1/1) ... [2022-10-17 11:04:27,368 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:04:27" (1/1) ... [2022-10-17 11:04:27,375 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:04:27" (1/1) ... [2022-10-17 11:04:27,381 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:04:27" (1/1) ... [2022-10-17 11:04:27,391 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 11:04:27,392 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 11:04:27,393 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 11:04:27,393 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 11:04:27,394 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:04:27" (1/1) ... [2022-10-17 11:04:27,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 11:04:27,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2c32644-d250-4875-8c56-c1352b68dc4d/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 11:04:27,452 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2c32644-d250-4875-8c56-c1352b68dc4d/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 11:04:27,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2c32644-d250-4875-8c56-c1352b68dc4d/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 11:04:27,507 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2022-10-17 11:04:27,507 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2022-10-17 11:04:27,507 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 11:04:27,507 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_bounded [2022-10-17 11:04:27,508 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_bounded [2022-10-17 11:04:27,508 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_valid [2022-10-17 11:04:27,508 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_valid [2022-10-17 11:04:27,508 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2022-10-17 11:04:27,508 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2022-10-17 11:04:27,509 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-17 11:04:27,509 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2022-10-17 11:04:27,509 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2022-10-17 11:04:27,509 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-10-17 11:04:27,509 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-10-17 11:04:27,510 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-10-17 11:04:27,510 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 11:04:27,510 INFO L130 BoogieDeclarations]: Found specification of procedure save_byte_from_array [2022-10-17 11:04:27,510 INFO L138 BoogieDeclarations]: Found implementation of procedure save_byte_from_array [2022-10-17 11:04:27,510 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-10-17 11:04:27,511 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 11:04:27,511 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 11:04:27,511 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2022-10-17 11:04:27,511 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2022-10-17 11:04:27,511 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2022-10-17 11:04:27,512 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2022-10-17 11:04:27,512 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2022-10-17 11:04:27,512 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2022-10-17 11:04:27,512 INFO L130 BoogieDeclarations]: Found specification of procedure aws_priority_queue_is_valid [2022-10-17 11:04:27,512 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_priority_queue_is_valid [2022-10-17 11:04:27,512 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_length [2022-10-17 11:04:27,513 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_length [2022-10-17 11:04:27,513 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-10-17 11:04:27,513 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-10-17 11:04:27,513 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-17 11:04:27,513 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-10-17 11:04:27,513 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-10-17 11:04:27,514 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2022-10-17 11:04:27,514 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2022-10-17 11:04:27,514 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2022-10-17 11:04:27,514 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2022-10-17 11:04:27,514 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-17 11:04:27,515 INFO L130 BoogieDeclarations]: Found specification of procedure assert_array_list_equivalence [2022-10-17 11:04:27,515 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_array_list_equivalence [2022-10-17 11:04:27,515 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_array_list_has_allocated_data_member [2022-10-17 11:04:27,515 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_array_list_has_allocated_data_member [2022-10-17 11:04:27,515 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 11:04:27,851 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 11:04:27,853 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 11:04:28,985 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 11:04:28,997 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 11:04:28,997 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-10-17 11:04:29,001 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 11:04:29 BoogieIcfgContainer [2022-10-17 11:04:29,001 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 11:04:29,003 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 11:04:29,004 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 11:04:29,007 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 11:04:29,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 11:04:24" (1/3) ... [2022-10-17 11:04:29,008 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78298006 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 11:04:29, skipping insertion in model container [2022-10-17 11:04:29,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:04:27" (2/3) ... [2022-10-17 11:04:29,009 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78298006 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 11:04:29, skipping insertion in model container [2022-10-17 11:04:29,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 11:04:29" (3/3) ... [2022-10-17 11:04:29,012 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_priority_queue_size_harness.i [2022-10-17 11:04:29,036 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 11:04:29,036 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 11:04:29,127 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 11:04:29,140 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;@483b4972, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 11:04:29,141 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 11:04:29,146 INFO L276 IsEmpty]: Start isEmpty. Operand has 171 states, 113 states have (on average 1.2300884955752212) internal successors, (139), 114 states have internal predecessors, (139), 39 states have call successors, (39), 17 states have call predecessors, (39), 17 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2022-10-17 11:04:29,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-10-17 11:04:29,170 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:04:29,171 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 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] [2022-10-17 11:04:29,173 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:04:29,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:04:29,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1923135121, now seen corresponding path program 1 times [2022-10-17 11:04:29,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:04:29,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810371959] [2022-10-17 11:04:29,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:04:29,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:04:29,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:29,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 11:04:29,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:29,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-17 11:04:29,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:29,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-10-17 11:04:29,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:29,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-10-17 11:04:30,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:30,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 11:04:30,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:30,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 11:04:30,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:30,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-10-17 11:04:30,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:30,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 11:04:30,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:30,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 11:04:30,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:30,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-10-17 11:04:30,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:30,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-10-17 11:04:30,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:30,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-10-17 11:04:30,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:30,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-10-17 11:04:30,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:30,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-10-17 11:04:30,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:30,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-10-17 11:04:30,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:30,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-10-17 11:04:30,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:30,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-10-17 11:04:30,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:30,268 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-10-17 11:04:30,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:04:30,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810371959] [2022-10-17 11:04:30,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810371959] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:04:30,270 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:04:30,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 11:04:30,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094591356] [2022-10-17 11:04:30,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:04:30,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 11:04:30,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:04:30,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 11:04:30,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-10-17 11:04:30,322 INFO L87 Difference]: Start difference. First operand has 171 states, 113 states have (on average 1.2300884955752212) internal successors, (139), 114 states have internal predecessors, (139), 39 states have call successors, (39), 17 states have call predecessors, (39), 17 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 2 states have internal predecessors, (40), 2 states have call successors, (17), 5 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-10-17 11:04:31,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:04:31,158 INFO L93 Difference]: Finished difference Result 399 states and 564 transitions. [2022-10-17 11:04:31,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 11:04:31,160 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 2 states have internal predecessors, (40), 2 states have call successors, (17), 5 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 107 [2022-10-17 11:04:31,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:04:31,174 INFO L225 Difference]: With dead ends: 399 [2022-10-17 11:04:31,174 INFO L226 Difference]: Without dead ends: 234 [2022-10-17 11:04:31,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-10-17 11:04:31,184 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 131 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-10-17 11:04:31,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 356 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-10-17 11:04:31,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-10-17 11:04:31,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 166. [2022-10-17 11:04:31,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 109 states have (on average 1.2110091743119267) internal successors, (132), 110 states have internal predecessors, (132), 39 states have call successors, (39), 17 states have call predecessors, (39), 17 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2022-10-17 11:04:31,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 209 transitions. [2022-10-17 11:04:31,251 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 209 transitions. Word has length 107 [2022-10-17 11:04:31,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:04:31,251 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 209 transitions. [2022-10-17 11:04:31,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 2 states have internal predecessors, (40), 2 states have call successors, (17), 5 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-10-17 11:04:31,252 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 209 transitions. [2022-10-17 11:04:31,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-10-17 11:04:31,256 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:04:31,256 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 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] [2022-10-17 11:04:31,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 11:04:31,257 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:04:31,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:04:31,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1898390481, now seen corresponding path program 1 times [2022-10-17 11:04:31,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:04:31,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334102660] [2022-10-17 11:04:31,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:04:31,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:04:31,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:31,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 11:04:31,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:31,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-17 11:04:31,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:31,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-10-17 11:04:31,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:31,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-10-17 11:04:31,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:31,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 11:04:31,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:31,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 11:04:31,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:31,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-10-17 11:04:31,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:32,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 11:04:32,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:32,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 11:04:32,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:32,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-10-17 11:04:32,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:32,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-10-17 11:04:32,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:32,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-10-17 11:04:32,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:32,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-10-17 11:04:32,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:32,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-10-17 11:04:32,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:32,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-10-17 11:04:32,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:32,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-10-17 11:04:32,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:32,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-10-17 11:04:32,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:32,174 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-10-17 11:04:32,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:04:32,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334102660] [2022-10-17 11:04:32,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334102660] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:04:32,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:04:32,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-10-17 11:04:32,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046470782] [2022-10-17 11:04:32,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:04:32,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-17 11:04:32,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:04:32,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-17 11:04:32,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-10-17 11:04:32,178 INFO L87 Difference]: Start difference. First operand 166 states and 209 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 5 states have internal predecessors, (40), 3 states have call successors, (17), 5 states have call predecessors, (17), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-10-17 11:04:33,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:04:33,062 INFO L93 Difference]: Finished difference Result 358 states and 477 transitions. [2022-10-17 11:04:33,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-10-17 11:04:33,063 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 5 states have internal predecessors, (40), 3 states have call successors, (17), 5 states have call predecessors, (17), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 107 [2022-10-17 11:04:33,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:04:33,068 INFO L225 Difference]: With dead ends: 358 [2022-10-17 11:04:33,068 INFO L226 Difference]: Without dead ends: 234 [2022-10-17 11:04:33,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-10-17 11:04:33,070 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 288 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-10-17 11:04:33,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [319 Valid, 504 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 601 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-10-17 11:04:33,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-10-17 11:04:33,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 166. [2022-10-17 11:04:33,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 109 states have (on average 1.201834862385321) internal successors, (131), 110 states have internal predecessors, (131), 39 states have call successors, (39), 17 states have call predecessors, (39), 17 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2022-10-17 11:04:33,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 208 transitions. [2022-10-17 11:04:33,100 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 208 transitions. Word has length 107 [2022-10-17 11:04:33,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:04:33,100 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 208 transitions. [2022-10-17 11:04:33,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 5 states have internal predecessors, (40), 3 states have call successors, (17), 5 states have call predecessors, (17), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-10-17 11:04:33,101 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 208 transitions. [2022-10-17 11:04:33,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-10-17 11:04:33,104 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:04:33,104 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 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] [2022-10-17 11:04:33,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 11:04:33,104 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:04:33,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:04:33,105 INFO L85 PathProgramCache]: Analyzing trace with hash 413511437, now seen corresponding path program 1 times [2022-10-17 11:04:33,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:04:33,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487708523] [2022-10-17 11:04:33,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:04:33,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:04:33,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:33,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 11:04:33,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:33,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-17 11:04:33,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:33,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-10-17 11:04:33,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:33,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-10-17 11:04:33,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:33,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 11:04:33,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:33,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 11:04:33,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:33,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-10-17 11:04:33,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:33,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 11:04:33,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:33,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 11:04:33,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:33,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-10-17 11:04:33,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:33,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 11:04:33,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:34,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-10-17 11:04:34,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:34,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-10-17 11:04:34,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:34,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-10-17 11:04:34,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:34,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-10-17 11:04:34,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:34,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-10-17 11:04:34,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:34,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-10-17 11:04:34,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:34,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-10-17 11:04:34,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:34,087 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-10-17 11:04:34,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:04:34,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487708523] [2022-10-17 11:04:34,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487708523] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 11:04:34,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331798775] [2022-10-17 11:04:34,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:04:34,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:04:34,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2c32644-d250-4875-8c56-c1352b68dc4d/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 11:04:34,091 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2c32644-d250-4875-8c56-c1352b68dc4d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 11:04:34,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2c32644-d250-4875-8c56-c1352b68dc4d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 11:04:34,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:34,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 2345 conjuncts, 6 conjunts are in the unsatisfiable core [2022-10-17 11:04:34,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 11:04:34,814 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-10-17 11:04:34,814 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 11:04:34,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331798775] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:04:34,815 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 11:04:34,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 16 [2022-10-17 11:04:34,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033464924] [2022-10-17 11:04:34,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:04:34,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 11:04:34,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:04:34,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 11:04:34,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2022-10-17 11:04:34,820 INFO L87 Difference]: Start difference. First operand 166 states and 208 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 4 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-10-17 11:04:35,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:04:35,010 INFO L93 Difference]: Finished difference Result 309 states and 396 transitions. [2022-10-17 11:04:35,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 11:04:35,011 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 4 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 115 [2022-10-17 11:04:35,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:04:35,015 INFO L225 Difference]: With dead ends: 309 [2022-10-17 11:04:35,015 INFO L226 Difference]: Without dead ends: 168 [2022-10-17 11:04:35,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2022-10-17 11:04:35,021 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 81 mSDsluCounter, 865 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 1056 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 11:04:35,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 1056 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 11:04:35,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-10-17 11:04:35,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2022-10-17 11:04:35,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 110 states have (on average 1.2) internal successors, (132), 112 states have internal predecessors, (132), 39 states have call successors, (39), 17 states have call predecessors, (39), 18 states have return successors, (41), 38 states have call predecessors, (41), 38 states have call successors, (41) [2022-10-17 11:04:35,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 212 transitions. [2022-10-17 11:04:35,070 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 212 transitions. Word has length 115 [2022-10-17 11:04:35,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:04:35,072 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 212 transitions. [2022-10-17 11:04:35,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 4 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-10-17 11:04:35,073 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 212 transitions. [2022-10-17 11:04:35,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-10-17 11:04:35,076 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:04:35,077 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 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] [2022-10-17 11:04:35,119 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2c32644-d250-4875-8c56-c1352b68dc4d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 11:04:35,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2c32644-d250-4875-8c56-c1352b68dc4d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:04:35,299 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:04:35,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:04:35,300 INFO L85 PathProgramCache]: Analyzing trace with hash -445935835, now seen corresponding path program 1 times [2022-10-17 11:04:35,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:04:35,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600568553] [2022-10-17 11:04:35,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:04:35,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:04:35,394 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 11:04:35,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1607013425] [2022-10-17 11:04:35,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:04:35,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:04:35,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2c32644-d250-4875-8c56-c1352b68dc4d/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 11:04:35,395 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2c32644-d250-4875-8c56-c1352b68dc4d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 11:04:35,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2c32644-d250-4875-8c56-c1352b68dc4d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 11:04:35,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:35,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 2481 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-17 11:04:35,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 11:04:35,957 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-10-17 11:04:35,957 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 11:04:35,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:04:35,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600568553] [2022-10-17 11:04:35,958 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 11:04:35,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607013425] [2022-10-17 11:04:35,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607013425] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:04:35,958 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:04:35,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 11:04:36,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293670665] [2022-10-17 11:04:36,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:04:36,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 11:04:36,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:04:36,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 11:04:36,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 11:04:36,002 INFO L87 Difference]: Start difference. First operand 168 states and 212 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-10-17 11:04:36,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:04:36,051 INFO L93 Difference]: Finished difference Result 297 states and 384 transitions. [2022-10-17 11:04:36,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 11:04:36,052 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 130 [2022-10-17 11:04:36,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:04:36,055 INFO L225 Difference]: With dead ends: 297 [2022-10-17 11:04:36,055 INFO L226 Difference]: Without dead ends: 173 [2022-10-17 11:04:36,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-17 11:04:36,058 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 10 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 611 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 [2022-10-17 11:04:36,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 611 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 11:04:36,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-10-17 11:04:36,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 170. [2022-10-17 11:04:36,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 112 states have (on average 1.1964285714285714) internal successors, (134), 114 states have internal predecessors, (134), 39 states have call successors, (39), 17 states have call predecessors, (39), 18 states have return successors, (41), 38 states have call predecessors, (41), 38 states have call successors, (41) [2022-10-17 11:04:36,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 214 transitions. [2022-10-17 11:04:36,085 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 214 transitions. Word has length 130 [2022-10-17 11:04:36,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:04:36,086 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 214 transitions. [2022-10-17 11:04:36,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-10-17 11:04:36,086 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 214 transitions. [2022-10-17 11:04:36,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-10-17 11:04:36,088 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:04:36,088 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 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] [2022-10-17 11:04:36,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2c32644-d250-4875-8c56-c1352b68dc4d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-17 11:04:36,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2c32644-d250-4875-8c56-c1352b68dc4d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-10-17 11:04:36,315 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:04:36,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:04:36,316 INFO L85 PathProgramCache]: Analyzing trace with hash -879664921, now seen corresponding path program 1 times [2022-10-17 11:04:36,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:04:36,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841055328] [2022-10-17 11:04:36,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:04:36,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:04:36,411 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 11:04:36,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2133296700] [2022-10-17 11:04:36,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:04:36,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:04:36,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2c32644-d250-4875-8c56-c1352b68dc4d/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 11:04:36,413 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2c32644-d250-4875-8c56-c1352b68dc4d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 11:04:36,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2c32644-d250-4875-8c56-c1352b68dc4d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-17 11:04:36,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:36,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 2486 conjuncts, 7 conjunts are in the unsatisfiable core [2022-10-17 11:04:36,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 11:04:37,042 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-10-17 11:04:37,042 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 11:04:37,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:04:37,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841055328] [2022-10-17 11:04:37,043 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 11:04:37,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133296700] [2022-10-17 11:04:37,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133296700] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:04:37,043 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:04:37,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-10-17 11:04:37,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788062662] [2022-10-17 11:04:37,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:04:37,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 11:04:37,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:04:37,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 11:04:37,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-10-17 11:04:37,045 INFO L87 Difference]: Start difference. First operand 170 states and 214 transitions. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2022-10-17 11:04:37,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:04:37,292 INFO L93 Difference]: Finished difference Result 299 states and 378 transitions. [2022-10-17 11:04:37,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 11:04:37,293 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 130 [2022-10-17 11:04:37,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:04:37,298 INFO L225 Difference]: With dead ends: 299 [2022-10-17 11:04:37,299 INFO L226 Difference]: Without dead ends: 170 [2022-10-17 11:04:37,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-10-17 11:04:37,300 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 243 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 808 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 11:04:37,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 808 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 11:04:37,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-10-17 11:04:37,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2022-10-17 11:04:37,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 112 states have (on average 1.1875) internal successors, (133), 114 states have internal predecessors, (133), 39 states have call successors, (39), 17 states have call predecessors, (39), 18 states have return successors, (41), 38 states have call predecessors, (41), 38 states have call successors, (41) [2022-10-17 11:04:37,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 213 transitions. [2022-10-17 11:04:37,321 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 213 transitions. Word has length 130 [2022-10-17 11:04:37,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:04:37,321 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 213 transitions. [2022-10-17 11:04:37,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2022-10-17 11:04:37,322 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 213 transitions. [2022-10-17 11:04:37,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-10-17 11:04:37,324 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:04:37,324 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 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] [2022-10-17 11:04:37,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2c32644-d250-4875-8c56-c1352b68dc4d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-17 11:04:37,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2c32644-d250-4875-8c56-c1352b68dc4d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:04:37,546 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:04:37,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:04:37,546 INFO L85 PathProgramCache]: Analyzing trace with hash 391202648, now seen corresponding path program 1 times [2022-10-17 11:04:37,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:04:37,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182416826] [2022-10-17 11:04:37,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:04:37,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:04:37,649 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 11:04:37,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1656129457] [2022-10-17 11:04:37,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:04:37,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:04:37,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2c32644-d250-4875-8c56-c1352b68dc4d/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 11:04:37,650 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2c32644-d250-4875-8c56-c1352b68dc4d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 11:04:37,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2c32644-d250-4875-8c56-c1352b68dc4d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-17 11:04:38,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:38,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 2558 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-17 11:04:38,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 11:04:38,341 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-10-17 11:04:38,342 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 11:04:38,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:04:38,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182416826] [2022-10-17 11:04:38,342 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 11:04:38,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656129457] [2022-10-17 11:04:38,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656129457] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:04:38,343 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:04:38,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-10-17 11:04:38,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762042780] [2022-10-17 11:04:38,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:04:38,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-17 11:04:38,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:04:38,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-17 11:04:38,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-10-17 11:04:38,345 INFO L87 Difference]: Start difference. First operand 170 states and 213 transitions. Second operand has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 5 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-10-17 11:04:38,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:04:38,569 INFO L93 Difference]: Finished difference Result 312 states and 395 transitions. [2022-10-17 11:04:38,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 11:04:38,570 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 5 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 146 [2022-10-17 11:04:38,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:04:38,571 INFO L225 Difference]: With dead ends: 312 [2022-10-17 11:04:38,571 INFO L226 Difference]: Without dead ends: 170 [2022-10-17 11:04:38,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-10-17 11:04:38,573 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 104 mSDsluCounter, 985 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 1168 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 11:04:38,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 1168 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 11:04:38,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-10-17 11:04:38,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2022-10-17 11:04:38,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 112 states have (on average 1.1875) internal successors, (133), 114 states have internal predecessors, (133), 39 states have call successors, (39), 17 states have call predecessors, (39), 18 states have return successors, (40), 38 states have call predecessors, (40), 38 states have call successors, (40) [2022-10-17 11:04:38,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 212 transitions. [2022-10-17 11:04:38,590 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 212 transitions. Word has length 146 [2022-10-17 11:04:38,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:04:38,590 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 212 transitions. [2022-10-17 11:04:38,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 5 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-10-17 11:04:38,591 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 212 transitions. [2022-10-17 11:04:38,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-10-17 11:04:38,593 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:04:38,593 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 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] [2022-10-17 11:04:38,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2c32644-d250-4875-8c56-c1352b68dc4d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-17 11:04:38,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2c32644-d250-4875-8c56-c1352b68dc4d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-10-17 11:04:38,819 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:04:38,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:04:38,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1071073244, now seen corresponding path program 2 times [2022-10-17 11:04:38,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:04:38,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475327457] [2022-10-17 11:04:38,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:04:38,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:04:38,940 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 11:04:38,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [518338380] [2022-10-17 11:04:38,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-17 11:04:38,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:04:38,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2c32644-d250-4875-8c56-c1352b68dc4d/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 11:04:38,941 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2c32644-d250-4875-8c56-c1352b68dc4d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 11:04:38,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2c32644-d250-4875-8c56-c1352b68dc4d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-17 11:04:39,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-17 11:04:39,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 11:04:39,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 2699 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-17 11:04:39,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 11:04:40,010 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-10-17 11:04:40,010 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 11:04:40,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:04:40,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475327457] [2022-10-17 11:04:40,011 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 11:04:40,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518338380] [2022-10-17 11:04:40,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518338380] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:04:40,011 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:04:40,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-10-17 11:04:40,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863848249] [2022-10-17 11:04:40,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:04:40,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-17 11:04:40,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:04:40,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-17 11:04:40,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-10-17 11:04:40,014 INFO L87 Difference]: Start difference. First operand 170 states and 212 transitions. Second operand has 9 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 5 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) [2022-10-17 11:04:40,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:04:40,319 INFO L93 Difference]: Finished difference Result 277 states and 343 transitions. [2022-10-17 11:04:40,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-17 11:04:40,320 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 5 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) Word has length 161 [2022-10-17 11:04:40,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:04:40,322 INFO L225 Difference]: With dead ends: 277 [2022-10-17 11:04:40,322 INFO L226 Difference]: Without dead ends: 168 [2022-10-17 11:04:40,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-10-17 11:04:40,323 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 213 mSDsluCounter, 941 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 1110 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 11:04:40,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 1110 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 11:04:40,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-10-17 11:04:40,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2022-10-17 11:04:40,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 111 states have (on average 1.1801801801801801) internal successors, (131), 112 states have internal predecessors, (131), 39 states have call successors, (39), 17 states have call predecessors, (39), 17 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2022-10-17 11:04:40,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 208 transitions. [2022-10-17 11:04:40,341 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 208 transitions. Word has length 161 [2022-10-17 11:04:40,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:04:40,341 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 208 transitions. [2022-10-17 11:04:40,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 5 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) [2022-10-17 11:04:40,342 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 208 transitions. [2022-10-17 11:04:40,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-10-17 11:04:40,344 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:04:40,345 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 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] [2022-10-17 11:04:40,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2c32644-d250-4875-8c56-c1352b68dc4d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-10-17 11:04:40,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2c32644-d250-4875-8c56-c1352b68dc4d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-10-17 11:04:40,558 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:04:40,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:04:40,559 INFO L85 PathProgramCache]: Analyzing trace with hash 153523288, now seen corresponding path program 1 times [2022-10-17 11:04:40,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:04:40,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685764683] [2022-10-17 11:04:40,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:04:40,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:04:40,655 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 11:04:40,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2089366286] [2022-10-17 11:04:40,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:04:40,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:04:40,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2c32644-d250-4875-8c56-c1352b68dc4d/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 11:04:40,656 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2c32644-d250-4875-8c56-c1352b68dc4d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 11:04:40,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2c32644-d250-4875-8c56-c1352b68dc4d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-10-17 11:04:41,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:41,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 2981 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-17 11:04:41,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 11:04:41,470 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-10-17 11:04:41,471 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 11:04:41,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:04:41,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685764683] [2022-10-17 11:04:41,471 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 11:04:41,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089366286] [2022-10-17 11:04:41,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089366286] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:04:41,472 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:04:41,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 11:04:41,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068859436] [2022-10-17 11:04:41,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:04:41,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 11:04:41,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:04:41,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 11:04:41,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-10-17 11:04:41,474 INFO L87 Difference]: Start difference. First operand 168 states and 208 transitions. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-10-17 11:04:41,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:04:41,803 INFO L93 Difference]: Finished difference Result 310 states and 389 transitions. [2022-10-17 11:04:41,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 11:04:41,804 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 191 [2022-10-17 11:04:41,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:04:41,806 INFO L225 Difference]: With dead ends: 310 [2022-10-17 11:04:41,806 INFO L226 Difference]: Without dead ends: 186 [2022-10-17 11:04:41,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-10-17 11:04:41,807 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 21 mSDsluCounter, 698 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 899 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 11:04:41,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 899 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 11:04:41,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-10-17 11:04:41,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 172. [2022-10-17 11:04:41,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 115 states have (on average 1.182608695652174) internal successors, (136), 116 states have internal predecessors, (136), 39 states have call successors, (39), 17 states have call predecessors, (39), 17 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2022-10-17 11:04:41,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 213 transitions. [2022-10-17 11:04:41,825 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 213 transitions. Word has length 191 [2022-10-17 11:04:41,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:04:41,826 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 213 transitions. [2022-10-17 11:04:41,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-10-17 11:04:41,826 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 213 transitions. [2022-10-17 11:04:41,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-10-17 11:04:41,829 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:04:41,829 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 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] [2022-10-17 11:04:41,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2c32644-d250-4875-8c56-c1352b68dc4d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-10-17 11:04:42,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2c32644-d250-4875-8c56-c1352b68dc4d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:04:42,050 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:04:42,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:04:42,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1805051498, now seen corresponding path program 1 times [2022-10-17 11:04:42,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:04:42,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659342573] [2022-10-17 11:04:42,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:04:42,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:04:42,171 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 11:04:42,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1232683260] [2022-10-17 11:04:42,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:04:42,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:04:42,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2c32644-d250-4875-8c56-c1352b68dc4d/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 11:04:42,172 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2c32644-d250-4875-8c56-c1352b68dc4d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 11:04:42,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2c32644-d250-4875-8c56-c1352b68dc4d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-10-17 11:04:42,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:42,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 2978 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-17 11:04:42,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 11:04:42,859 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-10-17 11:04:42,859 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 11:04:42,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:04:42,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659342573] [2022-10-17 11:04:42,859 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 11:04:42,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232683260] [2022-10-17 11:04:42,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232683260] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:04:42,860 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:04:42,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 11:04:42,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849062198] [2022-10-17 11:04:42,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:04:42,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 11:04:42,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:04:42,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 11:04:42,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 11:04:42,862 INFO L87 Difference]: Start difference. First operand 172 states and 213 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-10-17 11:04:42,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:04:42,899 INFO L93 Difference]: Finished difference Result 304 states and 379 transitions. [2022-10-17 11:04:42,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 11:04:42,899 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 191 [2022-10-17 11:04:42,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:04:42,901 INFO L225 Difference]: With dead ends: 304 [2022-10-17 11:04:42,901 INFO L226 Difference]: Without dead ends: 176 [2022-10-17 11:04:42,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-17 11:04:42,903 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 3 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 604 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 [2022-10-17 11:04:42,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 604 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 11:04:42,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-10-17 11:04:42,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 174. [2022-10-17 11:04:42,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 117 states have (on average 1.1794871794871795) internal successors, (138), 118 states have internal predecessors, (138), 39 states have call successors, (39), 17 states have call predecessors, (39), 17 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2022-10-17 11:04:42,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 215 transitions. [2022-10-17 11:04:42,920 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 215 transitions. Word has length 191 [2022-10-17 11:04:42,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:04:42,920 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 215 transitions. [2022-10-17 11:04:42,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-10-17 11:04:42,920 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 215 transitions. [2022-10-17 11:04:42,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-10-17 11:04:42,923 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:04:42,923 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 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] [2022-10-17 11:04:42,964 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2c32644-d250-4875-8c56-c1352b68dc4d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-10-17 11:04:43,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2c32644-d250-4875-8c56-c1352b68dc4d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:04:43,139 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:04:43,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:04:43,140 INFO L85 PathProgramCache]: Analyzing trace with hash 610784852, now seen corresponding path program 1 times [2022-10-17 11:04:43,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:04:43,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789412160] [2022-10-17 11:04:43,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:04:43,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:04:43,235 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 11:04:43,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [221639605] [2022-10-17 11:04:43,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:04:43,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:04:43,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2c32644-d250-4875-8c56-c1352b68dc4d/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 11:04:43,237 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2c32644-d250-4875-8c56-c1352b68dc4d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 11:04:43,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2c32644-d250-4875-8c56-c1352b68dc4d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-10-17 11:04:43,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:43,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 2973 conjuncts, 38 conjunts are in the unsatisfiable core [2022-10-17 11:04:43,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 11:04:44,186 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 [2022-10-17 11:04:44,205 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 121 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-10-17 11:04:44,206 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 11:04:44,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:04:44,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789412160] [2022-10-17 11:04:44,206 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 11:04:44,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221639605] [2022-10-17 11:04:44,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221639605] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:04:44,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:04:44,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-10-17 11:04:44,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400013768] [2022-10-17 11:04:44,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:04:44,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-10-17 11:04:44,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:04:44,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-10-17 11:04:44,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-10-17 11:04:44,211 INFO L87 Difference]: Start difference. First operand 174 states and 215 transitions. Second operand has 10 states, 10 states have (on average 9.0) internal successors, (90), 10 states have internal predecessors, (90), 6 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2022-10-17 11:04:44,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:04:44,693 INFO L93 Difference]: Finished difference Result 329 states and 415 transitions. [2022-10-17 11:04:44,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-10-17 11:04:44,694 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 9.0) internal successors, (90), 10 states have internal predecessors, (90), 6 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) Word has length 191 [2022-10-17 11:04:44,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:04:44,696 INFO L225 Difference]: With dead ends: 329 [2022-10-17 11:04:44,696 INFO L226 Difference]: Without dead ends: 197 [2022-10-17 11:04:44,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-10-17 11:04:44,704 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 119 mSDsluCounter, 1128 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 1312 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-17 11:04:44,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 1312 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-17 11:04:44,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-10-17 11:04:44,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 187. [2022-10-17 11:04:44,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 129 states have (on average 1.186046511627907) internal successors, (153), 130 states have internal predecessors, (153), 39 states have call successors, (39), 17 states have call predecessors, (39), 18 states have return successors, (42), 39 states have call predecessors, (42), 38 states have call successors, (42) [2022-10-17 11:04:44,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 234 transitions. [2022-10-17 11:04:44,726 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 234 transitions. Word has length 191 [2022-10-17 11:04:44,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:04:44,727 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 234 transitions. [2022-10-17 11:04:44,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.0) internal successors, (90), 10 states have internal predecessors, (90), 6 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2022-10-17 11:04:44,727 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 234 transitions. [2022-10-17 11:04:44,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-10-17 11:04:44,731 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:04:44,731 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 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] [2022-10-17 11:04:44,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2c32644-d250-4875-8c56-c1352b68dc4d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-10-17 11:04:44,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2c32644-d250-4875-8c56-c1352b68dc4d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-10-17 11:04:44,956 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:04:44,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:04:44,956 INFO L85 PathProgramCache]: Analyzing trace with hash -841170410, now seen corresponding path program 1 times [2022-10-17 11:04:44,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:04:44,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134552354] [2022-10-17 11:04:44,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:04:44,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:04:45,047 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 11:04:45,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [387258243] [2022-10-17 11:04:45,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:04:45,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:04:45,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2c32644-d250-4875-8c56-c1352b68dc4d/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 11:04:45,049 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2c32644-d250-4875-8c56-c1352b68dc4d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 11:04:45,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2c32644-d250-4875-8c56-c1352b68dc4d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-10-17 11:04:45,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:45,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 2976 conjuncts, 22 conjunts are in the unsatisfiable core [2022-10-17 11:04:45,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 11:04:45,687 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-10-17 11:04:45,688 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 11:04:45,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:04:45,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134552354] [2022-10-17 11:04:45,688 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 11:04:45,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387258243] [2022-10-17 11:04:45,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387258243] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:04:45,689 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:04:45,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 11:04:45,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332279978] [2022-10-17 11:04:45,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:04:45,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 11:04:45,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:04:45,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 11:04:45,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 11:04:45,691 INFO L87 Difference]: Start difference. First operand 187 states and 234 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-10-17 11:04:45,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:04:45,740 INFO L93 Difference]: Finished difference Result 346 states and 437 transitions. [2022-10-17 11:04:45,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 11:04:45,741 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 191 [2022-10-17 11:04:45,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:04:45,743 INFO L225 Difference]: With dead ends: 346 [2022-10-17 11:04:45,743 INFO L226 Difference]: Without dead ends: 203 [2022-10-17 11:04:45,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-10-17 11:04:45,745 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 9 mSDsluCounter, 615 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 826 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 11:04:45,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 826 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 11:04:45,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-10-17 11:04:45,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 197. [2022-10-17 11:04:45,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 139 states have (on average 1.1870503597122302) internal successors, (165), 140 states have internal predecessors, (165), 39 states have call successors, (39), 17 states have call predecessors, (39), 18 states have return successors, (42), 39 states have call predecessors, (42), 38 states have call successors, (42) [2022-10-17 11:04:45,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 246 transitions. [2022-10-17 11:04:45,763 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 246 transitions. Word has length 191 [2022-10-17 11:04:45,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:04:45,764 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 246 transitions. [2022-10-17 11:04:45,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-10-17 11:04:45,764 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 246 transitions. [2022-10-17 11:04:45,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-10-17 11:04:45,767 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:04:45,767 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 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] [2022-10-17 11:04:45,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2c32644-d250-4875-8c56-c1352b68dc4d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-10-17 11:04:45,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2c32644-d250-4875-8c56-c1352b68dc4d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:04:45,983 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:04:45,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:04:45,983 INFO L85 PathProgramCache]: Analyzing trace with hash 2030586518, now seen corresponding path program 1 times [2022-10-17 11:04:45,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:04:45,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398847120] [2022-10-17 11:04:45,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:04:45,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:04:46,078 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 11:04:46,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1369461187] [2022-10-17 11:04:46,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:04:46,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:04:46,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2c32644-d250-4875-8c56-c1352b68dc4d/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 11:04:46,080 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2c32644-d250-4875-8c56-c1352b68dc4d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 11:04:46,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2c32644-d250-4875-8c56-c1352b68dc4d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-10-17 11:04:46,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:46,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 2978 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-17 11:04:46,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 11:04:46,708 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-10-17 11:04:46,708 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 11:04:46,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:04:46,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398847120] [2022-10-17 11:04:46,708 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 11:04:46,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369461187] [2022-10-17 11:04:46,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369461187] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:04:46,709 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:04:46,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 11:04:46,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365180808] [2022-10-17 11:04:46,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:04:46,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 11:04:46,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:04:46,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 11:04:46,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 11:04:46,711 INFO L87 Difference]: Start difference. First operand 197 states and 246 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-10-17 11:04:46,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:04:46,750 INFO L93 Difference]: Finished difference Result 346 states and 434 transitions. [2022-10-17 11:04:46,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 11:04:46,751 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 191 [2022-10-17 11:04:46,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:04:46,753 INFO L225 Difference]: With dead ends: 346 [2022-10-17 11:04:46,753 INFO L226 Difference]: Without dead ends: 193 [2022-10-17 11:04:46,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-17 11:04:46,755 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 2 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 11:04:46,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 606 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 11:04:46,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-10-17 11:04:46,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 189. [2022-10-17 11:04:46,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 131 states have (on average 1.16793893129771) internal successors, (153), 132 states have internal predecessors, (153), 39 states have call successors, (39), 17 states have call predecessors, (39), 18 states have return successors, (42), 39 states have call predecessors, (42), 38 states have call successors, (42) [2022-10-17 11:04:46,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 234 transitions. [2022-10-17 11:04:46,771 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 234 transitions. Word has length 191 [2022-10-17 11:04:46,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:04:46,772 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 234 transitions. [2022-10-17 11:04:46,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-10-17 11:04:46,773 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 234 transitions. [2022-10-17 11:04:46,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-10-17 11:04:46,775 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:04:46,775 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 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, 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] [2022-10-17 11:04:46,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2c32644-d250-4875-8c56-c1352b68dc4d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-10-17 11:04:47,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2c32644-d250-4875-8c56-c1352b68dc4d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-10-17 11:04:47,003 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:04:47,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:04:47,003 INFO L85 PathProgramCache]: Analyzing trace with hash 955866556, now seen corresponding path program 1 times [2022-10-17 11:04:47,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:04:47,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95901113] [2022-10-17 11:04:47,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:04:47,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:04:47,097 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 11:04:47,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1951582652] [2022-10-17 11:04:47,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:04:47,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:04:47,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2c32644-d250-4875-8c56-c1352b68dc4d/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 11:04:47,098 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2c32644-d250-4875-8c56-c1352b68dc4d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 11:04:47,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2c32644-d250-4875-8c56-c1352b68dc4d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-10-17 11:04:47,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:47,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 2973 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-17 11:04:47,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 11:04:47,884 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-10-17 11:04:47,887 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 11:04:47,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:04:47,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95901113] [2022-10-17 11:04:47,888 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 11:04:47,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951582652] [2022-10-17 11:04:47,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951582652] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:04:47,888 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:04:47,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 11:04:47,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447129012] [2022-10-17 11:04:47,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:04:47,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 11:04:47,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:04:47,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 11:04:47,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 11:04:47,892 INFO L87 Difference]: Start difference. First operand 189 states and 234 transitions. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-10-17 11:04:48,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:04:48,155 INFO L93 Difference]: Finished difference Result 334 states and 421 transitions. [2022-10-17 11:04:48,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 11:04:48,156 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 193 [2022-10-17 11:04:48,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:04:48,158 INFO L225 Difference]: With dead ends: 334 [2022-10-17 11:04:48,158 INFO L226 Difference]: Without dead ends: 189 [2022-10-17 11:04:48,159 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-10-17 11:04:48,160 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 7 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 755 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 11:04:48,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 755 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 11:04:48,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-10-17 11:04:48,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2022-10-17 11:04:48,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 131 states have (on average 1.1603053435114503) internal successors, (152), 132 states have internal predecessors, (152), 39 states have call successors, (39), 17 states have call predecessors, (39), 18 states have return successors, (42), 39 states have call predecessors, (42), 38 states have call successors, (42) [2022-10-17 11:04:48,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 233 transitions. [2022-10-17 11:04:48,180 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 233 transitions. Word has length 193 [2022-10-17 11:04:48,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:04:48,181 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 233 transitions. [2022-10-17 11:04:48,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-10-17 11:04:48,181 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 233 transitions. [2022-10-17 11:04:48,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-10-17 11:04:48,184 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:04:48,185 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 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, 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] [2022-10-17 11:04:48,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2c32644-d250-4875-8c56-c1352b68dc4d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-10-17 11:04:48,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2c32644-d250-4875-8c56-c1352b68dc4d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-10-17 11:04:48,411 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:04:48,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:04:48,411 INFO L85 PathProgramCache]: Analyzing trace with hash -100864646, now seen corresponding path program 1 times [2022-10-17 11:04:48,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:04:48,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262948125] [2022-10-17 11:04:48,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:04:48,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:04:48,519 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 11:04:48,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1500052481] [2022-10-17 11:04:48,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:04:48,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:04:48,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2c32644-d250-4875-8c56-c1352b68dc4d/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 11:04:48,522 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2c32644-d250-4875-8c56-c1352b68dc4d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 11:04:48,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2c32644-d250-4875-8c56-c1352b68dc4d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-10-17 11:04:49,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:49,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 2978 conjuncts, 103 conjunts are in the unsatisfiable core [2022-10-17 11:04:49,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 11:04:53,156 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-10-17 11:04:53,156 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 [2022-10-17 11:04:53,175 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-10-17 11:04:53,176 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 33 treesize of output 13 [2022-10-17 11:04:53,186 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-10-17 11:04:53,186 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 [2022-10-17 11:04:53,403 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 129 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-10-17 11:04:53,403 INFO L328 TraceCheckSpWp]: Computing backward predicates...