./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95b96906-c0e5-4d7a-b63d-f3af8efc76d1/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95b96906-c0e5-4d7a-b63d-f3af8efc76d1/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95b96906-c0e5-4d7a-b63d-f3af8efc76d1/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95b96906-c0e5-4d7a-b63d-f3af8efc76d1/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95b96906-c0e5-4d7a-b63d-f3af8efc76d1/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95b96906-c0e5-4d7a-b63d-f3af8efc76d1/bin/utaipan-verify-nQ1chXbOIh --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash efb3bc3d53d5de978717fadeb26804aec5f97721ade955fc2d1463ef24ff6010 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 18:32:17,561 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 18:32:17,626 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95b96906-c0e5-4d7a-b63d-f3af8efc76d1/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-12-02 18:32:17,630 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 18:32:17,631 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 18:32:17,655 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 18:32:17,656 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 18:32:17,656 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 18:32:17,657 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 18:32:17,657 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 18:32:17,658 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 18:32:17,658 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 18:32:17,659 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 18:32:17,659 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 18:32:17,660 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 18:32:17,660 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 18:32:17,661 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 18:32:17,661 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 18:32:17,662 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 18:32:17,662 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 18:32:17,663 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 18:32:17,666 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 18:32:17,666 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 18:32:17,667 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 18:32:17,667 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 18:32:17,668 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 18:32:17,668 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 18:32:17,668 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 18:32:17,668 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 18:32:17,669 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 18:32:17,669 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 18:32:17,670 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 18:32:17,670 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 18:32:17,670 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 18:32:17,670 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 18:32:17,671 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 18:32:17,671 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 18:32:17,671 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 18:32:17,671 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 18:32:17,671 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 18:32:17,672 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 18:32:17,672 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 18:32:17,672 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 18:32:17,672 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 18:32:17,673 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95b96906-c0e5-4d7a-b63d-f3af8efc76d1/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95b96906-c0e5-4d7a-b63d-f3af8efc76d1/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> efb3bc3d53d5de978717fadeb26804aec5f97721ade955fc2d1463ef24ff6010 [2023-12-02 18:32:17,876 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 18:32:17,895 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 18:32:17,897 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 18:32:17,898 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 18:32:17,899 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 18:32:17,900 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95b96906-c0e5-4d7a-b63d-f3af8efc76d1/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness.i [2023-12-02 18:32:20,762 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 18:32:21,130 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 18:32:21,131 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95b96906-c0e5-4d7a-b63d-f3af8efc76d1/sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness.i [2023-12-02 18:32:21,166 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95b96906-c0e5-4d7a-b63d-f3af8efc76d1/bin/utaipan-verify-nQ1chXbOIh/data/bb132010b/6bde1a80cfd2464cac6b9ed0493aa607/FLAG9e196e097 [2023-12-02 18:32:21,180 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95b96906-c0e5-4d7a-b63d-f3af8efc76d1/bin/utaipan-verify-nQ1chXbOIh/data/bb132010b/6bde1a80cfd2464cac6b9ed0493aa607 [2023-12-02 18:32:21,183 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 18:32:21,184 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 18:32:21,186 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 18:32:21,186 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 18:32:21,191 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 18:32:21,192 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 06:32:21" (1/1) ... [2023-12-02 18:32:21,193 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b479a52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:32:21, skipping insertion in model container [2023-12-02 18:32:21,193 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 06:32:21" (1/1) ... [2023-12-02 18:32:21,313 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 18:32:21,542 WARN L240 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_95b96906-c0e5-4d7a-b63d-f3af8efc76d1/sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness.i[4501,4514] [2023-12-02 18:32:21,550 WARN L240 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_95b96906-c0e5-4d7a-b63d-f3af8efc76d1/sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness.i[4561,4574] [2023-12-02 18:32:22,379 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:32:22,380 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:32:22,380 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:32:22,381 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:32:22,382 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:32:22,408 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:32:22,409 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:32:22,411 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:32:22,412 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:32:22,777 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-12-02 18:32:22,778 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-12-02 18:32:22,779 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-12-02 18:32:22,781 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-12-02 18:32:22,782 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-12-02 18:32:22,783 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-12-02 18:32:22,784 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-12-02 18:32:22,785 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-12-02 18:32:22,786 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-12-02 18:32:22,787 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-12-02 18:32:22,933 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:32:22,934 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:32:22,986 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 18:32:23,021 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 18:32:23,035 WARN L240 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_95b96906-c0e5-4d7a-b63d-f3af8efc76d1/sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness.i[4501,4514] [2023-12-02 18:32:23,036 WARN L240 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_95b96906-c0e5-4d7a-b63d-f3af8efc76d1/sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness.i[4561,4574] [2023-12-02 18:32:23,091 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:32:23,092 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:32:23,092 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:32:23,093 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:32:23,094 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:32:23,102 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:32:23,102 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:32:23,104 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:32:23,104 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:32:23,142 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-12-02 18:32:23,143 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-12-02 18:32:23,144 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-12-02 18:32:23,145 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-12-02 18:32:23,146 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-12-02 18:32:23,147 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-12-02 18:32:23,147 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-12-02 18:32:23,148 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-12-02 18:32:23,148 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-12-02 18:32:23,149 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-12-02 18:32:23,183 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:32:23,184 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:32:23,191 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : : "r"(pBuf) : "memory"); [7703-7714] [2023-12-02 18:32:23,210 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 18:32:23,429 WARN L675 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 18:32:23,430 WARN L675 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 18:32:23,430 WARN L675 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 18:32:23,430 WARN L675 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 18:32:23,430 WARN L675 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 18:32:23,430 WARN L675 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 18:32:23,430 WARN L675 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 18:32:23,431 WARN L675 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 18:32:23,431 WARN L675 CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 18:32:23,431 WARN L675 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 18:32:23,431 WARN L675 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 18:32:23,431 WARN L675 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 18:32:23,431 WARN L675 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 18:32:23,432 WARN L675 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 18:32:23,432 WARN L675 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 18:32:23,438 INFO L206 MainTranslator]: Completed translation [2023-12-02 18:32:23,438 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:32:23 WrapperNode [2023-12-02 18:32:23,438 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 18:32:23,439 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 18:32:23,439 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 18:32:23,439 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 18:32:23,445 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:32:23" (1/1) ... [2023-12-02 18:32:23,515 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:32:23" (1/1) ... [2023-12-02 18:32:23,573 INFO L138 Inliner]: procedures = 688, calls = 1498, calls flagged for inlining = 55, calls inlined = 9, statements flattened = 596 [2023-12-02 18:32:23,573 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 18:32:23,574 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 18:32:23,574 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 18:32:23,574 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 18:32:23,581 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:32:23" (1/1) ... [2023-12-02 18:32:23,581 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:32:23" (1/1) ... [2023-12-02 18:32:23,588 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:32:23" (1/1) ... [2023-12-02 18:32:23,589 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:32:23" (1/1) ... [2023-12-02 18:32:23,621 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:32:23" (1/1) ... [2023-12-02 18:32:23,626 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:32:23" (1/1) ... [2023-12-02 18:32:23,633 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:32:23" (1/1) ... [2023-12-02 18:32:23,638 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:32:23" (1/1) ... [2023-12-02 18:32:23,648 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 18:32:23,649 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 18:32:23,649 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 18:32:23,649 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 18:32:23,650 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:32:23" (1/1) ... [2023-12-02 18:32:23,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 18:32:23,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95b96906-c0e5-4d7a-b63d-f3af8efc76d1/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:32:23,682 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95b96906-c0e5-4d7a-b63d-f3af8efc76d1/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 18:32:23,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95b96906-c0e5-4d7a-b63d-f3af8efc76d1/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 18:32:23,717 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2023-12-02 18:32:23,718 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2023-12-02 18:32:23,718 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 18:32:23,718 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_bounded [2023-12-02 18:32:23,718 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_bounded [2023-12-02 18:32:23,718 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_valid [2023-12-02 18:32:23,718 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_valid [2023-12-02 18:32:23,719 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2023-12-02 18:32:23,719 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2023-12-02 18:32:23,719 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 18:32:23,719 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2023-12-02 18:32:23,719 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2023-12-02 18:32:23,719 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-02 18:32:23,720 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-02 18:32:23,720 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-02 18:32:23,720 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 18:32:23,720 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-12-02 18:32:23,720 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 18:32:23,720 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 18:32:23,720 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_clean_up [2023-12-02 18:32:23,720 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_clean_up [2023-12-02 18:32:23,720 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2023-12-02 18:32:23,720 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2023-12-02 18:32:23,721 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2023-12-02 18:32:23,721 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2023-12-02 18:32:23,721 INFO L130 BoogieDeclarations]: Found specification of procedure aws_priority_queue_is_valid [2023-12-02 18:32:23,721 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_priority_queue_is_valid [2023-12-02 18:32:23,721 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_release [2023-12-02 18:32:23,721 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_release [2023-12-02 18:32:23,721 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-02 18:32:23,721 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-02 18:32:23,721 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 18:32:23,722 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-12-02 18:32:23,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-12-02 18:32:23,722 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2023-12-02 18:32:23,722 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2023-12-02 18:32:23,722 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2023-12-02 18:32:23,722 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2023-12-02 18:32:23,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 18:32:23,722 INFO L130 BoogieDeclarations]: Found specification of procedure memset_impl [2023-12-02 18:32:23,722 INFO L138 BoogieDeclarations]: Found implementation of procedure memset_impl [2023-12-02 18:32:23,723 INFO L130 BoogieDeclarations]: Found specification of procedure my_memset [2023-12-02 18:32:23,723 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memset [2023-12-02 18:32:23,723 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_array_list_has_allocated_data_member [2023-12-02 18:32:23,723 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_array_list_has_allocated_data_member [2023-12-02 18:32:23,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 18:32:23,965 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 18:32:23,967 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 18:32:24,745 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 18:32:24,924 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 18:32:24,924 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-12-02 18:32:24,926 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:32:24 BoogieIcfgContainer [2023-12-02 18:32:24,926 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 18:32:24,928 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 18:32:24,928 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 18:32:24,930 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 18:32:24,930 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 06:32:21" (1/3) ... [2023-12-02 18:32:24,931 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11c1d107 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 06:32:24, skipping insertion in model container [2023-12-02 18:32:24,931 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:32:23" (2/3) ... [2023-12-02 18:32:24,931 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11c1d107 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 06:32:24, skipping insertion in model container [2023-12-02 18:32:24,931 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:32:24" (3/3) ... [2023-12-02 18:32:24,933 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_priority_queue_clean_up_harness.i [2023-12-02 18:32:24,947 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 18:32:24,947 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 18:32:24,997 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 18:32:25,003 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@34909a0a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 18:32:25,003 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 18:32:25,008 INFO L276 IsEmpty]: Start isEmpty. Operand has 126 states, 73 states have (on average 1.2328767123287672) internal successors, (90), 74 states have internal predecessors, (90), 35 states have call successors, (35), 17 states have call predecessors, (35), 17 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2023-12-02 18:32:25,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-12-02 18:32:25,023 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:32:25,023 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 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] [2023-12-02 18:32:25,024 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:32:25,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:32:25,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1188117460, now seen corresponding path program 1 times [2023-12-02 18:32:25,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:32:25,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14671256] [2023-12-02 18:32:25,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:32:25,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:32:25,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:32:25,585 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-12-02 18:32:25,586 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:32:25,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14671256] [2023-12-02 18:32:25,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14671256] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:32:25,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:32:25,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 18:32:25,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470582524] [2023-12-02 18:32:25,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:32:25,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-02 18:32:25,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:32:25,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-02 18:32:25,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-02 18:32:25,625 INFO L87 Difference]: Start difference. First operand has 126 states, 73 states have (on average 1.2328767123287672) internal successors, (90), 74 states have internal predecessors, (90), 35 states have call successors, (35), 17 states have call predecessors, (35), 17 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) Second operand has 2 states, 2 states have (on average 16.0) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2023-12-02 18:32:25,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:32:25,771 INFO L93 Difference]: Finished difference Result 199 states and 255 transitions. [2023-12-02 18:32:25,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-02 18:32:25,774 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 16.0) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 82 [2023-12-02 18:32:25,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:32:25,784 INFO L225 Difference]: With dead ends: 199 [2023-12-02 18:32:25,784 INFO L226 Difference]: Without dead ends: 124 [2023-12-02 18:32:25,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-02 18:32:25,791 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:32:25,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 134 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:32:25,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-12-02 18:32:25,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2023-12-02 18:32:25,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 71 states have (on average 1.2112676056338028) internal successors, (86), 73 states have internal predecessors, (86), 35 states have call successors, (35), 17 states have call predecessors, (35), 17 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2023-12-02 18:32:25,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 155 transitions. [2023-12-02 18:32:25,843 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 155 transitions. Word has length 82 [2023-12-02 18:32:25,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:32:25,844 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 155 transitions. [2023-12-02 18:32:25,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 16.0) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2023-12-02 18:32:25,845 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 155 transitions. [2023-12-02 18:32:25,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-12-02 18:32:25,850 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:32:25,850 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 3, 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] [2023-12-02 18:32:25,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 18:32:25,851 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:32:25,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:32:25,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1843381692, now seen corresponding path program 1 times [2023-12-02 18:32:25,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:32:25,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447150847] [2023-12-02 18:32:25,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:32:25,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:32:25,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:32:26,363 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-12-02 18:32:26,363 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:32:26,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447150847] [2023-12-02 18:32:26,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447150847] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:32:26,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:32:26,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 18:32:26,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209304369] [2023-12-02 18:32:26,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:32:26,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 18:32:26,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:32:26,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 18:32:26,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:32:26,367 INFO L87 Difference]: Start difference. First operand 124 states and 155 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2023-12-02 18:32:26,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:32:26,671 INFO L93 Difference]: Finished difference Result 200 states and 248 transitions. [2023-12-02 18:32:26,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 18:32:26,672 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 95 [2023-12-02 18:32:26,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:32:26,675 INFO L225 Difference]: With dead ends: 200 [2023-12-02 18:32:26,675 INFO L226 Difference]: Without dead ends: 124 [2023-12-02 18:32:26,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-02 18:32:26,678 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 18 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 18:32:26,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 473 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 18:32:26,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-12-02 18:32:26,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2023-12-02 18:32:26,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 71 states have (on average 1.1971830985915493) internal successors, (85), 73 states have internal predecessors, (85), 35 states have call successors, (35), 17 states have call predecessors, (35), 17 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2023-12-02 18:32:26,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 154 transitions. [2023-12-02 18:32:26,695 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 154 transitions. Word has length 95 [2023-12-02 18:32:26,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:32:26,696 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 154 transitions. [2023-12-02 18:32:26,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2023-12-02 18:32:26,696 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 154 transitions. [2023-12-02 18:32:26,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-12-02 18:32:26,698 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:32:26,699 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 3, 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] [2023-12-02 18:32:26,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 18:32:26,699 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:32:26,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:32:26,700 INFO L85 PathProgramCache]: Analyzing trace with hash 138453490, now seen corresponding path program 1 times [2023-12-02 18:32:26,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:32:26,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317775610] [2023-12-02 18:32:26,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:32:26,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:32:26,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:32:27,247 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-12-02 18:32:27,248 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:32:27,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317775610] [2023-12-02 18:32:27,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317775610] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:32:27,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:32:27,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 18:32:27,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642139939] [2023-12-02 18:32:27,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:32:27,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 18:32:27,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:32:27,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 18:32:27,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 18:32:27,251 INFO L87 Difference]: Start difference. First operand 124 states and 154 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2023-12-02 18:32:27,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:32:27,696 INFO L93 Difference]: Finished difference Result 211 states and 265 transitions. [2023-12-02 18:32:27,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 18:32:27,697 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 103 [2023-12-02 18:32:27,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:32:27,700 INFO L225 Difference]: With dead ends: 211 [2023-12-02 18:32:27,700 INFO L226 Difference]: Without dead ends: 126 [2023-12-02 18:32:27,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-12-02 18:32:27,703 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 32 mSDsluCounter, 582 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 708 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 18:32:27,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 708 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 18:32:27,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-12-02 18:32:27,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2023-12-02 18:32:27,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 72 states have (on average 1.1944444444444444) internal successors, (86), 75 states have internal predecessors, (86), 35 states have call successors, (35), 17 states have call predecessors, (35), 18 states have return successors, (36), 34 states have call predecessors, (36), 34 states have call successors, (36) [2023-12-02 18:32:27,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 157 transitions. [2023-12-02 18:32:27,718 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 157 transitions. Word has length 103 [2023-12-02 18:32:27,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:32:27,719 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 157 transitions. [2023-12-02 18:32:27,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2023-12-02 18:32:27,719 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 157 transitions. [2023-12-02 18:32:27,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-12-02 18:32:27,722 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:32:27,722 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 3, 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] [2023-12-02 18:32:27,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 18:32:27,722 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:32:27,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:32:27,723 INFO L85 PathProgramCache]: Analyzing trace with hash 2062453710, now seen corresponding path program 1 times [2023-12-02 18:32:27,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:32:27,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677559453] [2023-12-02 18:32:27,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:32:27,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:32:27,829 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 18:32:27,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1704714312] [2023-12-02 18:32:27,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:32:27,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:32:27,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95b96906-c0e5-4d7a-b63d-f3af8efc76d1/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:32:27,834 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95b96906-c0e5-4d7a-b63d-f3af8efc76d1/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:32:27,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95b96906-c0e5-4d7a-b63d-f3af8efc76d1/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 18:32:28,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:32:28,435 INFO L262 TraceCheckSpWp]: Trace formula consists of 2385 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 18:32:28,448 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:32:28,545 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-02 18:32:28,546 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:32:28,546 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:32:28,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677559453] [2023-12-02 18:32:28,546 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 18:32:28,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704714312] [2023-12-02 18:32:28,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704714312] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:32:28,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:32:28,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 18:32:28,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924832153] [2023-12-02 18:32:28,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:32:28,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 18:32:28,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:32:28,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 18:32:28,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 18:32:28,549 INFO L87 Difference]: Start difference. First operand 126 states and 157 transitions. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 4 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2023-12-02 18:32:29,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:32:29,069 INFO L93 Difference]: Finished difference Result 205 states and 253 transitions. [2023-12-02 18:32:29,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 18:32:29,070 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 4 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) Word has length 112 [2023-12-02 18:32:29,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:32:29,072 INFO L225 Difference]: With dead ends: 205 [2023-12-02 18:32:29,072 INFO L226 Difference]: Without dead ends: 126 [2023-12-02 18:32:29,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-12-02 18:32:29,074 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 24 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 18:32:29,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 582 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 18:32:29,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-12-02 18:32:29,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2023-12-02 18:32:29,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 75 states have internal predecessors, (85), 35 states have call successors, (35), 17 states have call predecessors, (35), 18 states have return successors, (36), 34 states have call predecessors, (36), 34 states have call successors, (36) [2023-12-02 18:32:29,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 156 transitions. [2023-12-02 18:32:29,088 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 156 transitions. Word has length 112 [2023-12-02 18:32:29,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:32:29,089 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 156 transitions. [2023-12-02 18:32:29,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 4 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2023-12-02 18:32:29,090 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 156 transitions. [2023-12-02 18:32:29,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-12-02 18:32:29,091 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:32:29,092 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 3, 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] [2023-12-02 18:32:29,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95b96906-c0e5-4d7a-b63d-f3af8efc76d1/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 18:32:29,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95b96906-c0e5-4d7a-b63d-f3af8efc76d1/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:32:29,293 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:32:29,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:32:29,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1168644479, now seen corresponding path program 1 times [2023-12-02 18:32:29,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:32:29,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744742992] [2023-12-02 18:32:29,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:32:29,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:32:29,387 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 18:32:29,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1639952245] [2023-12-02 18:32:29,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:32:29,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:32:29,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95b96906-c0e5-4d7a-b63d-f3af8efc76d1/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:32:29,389 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95b96906-c0e5-4d7a-b63d-f3af8efc76d1/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:32:29,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95b96906-c0e5-4d7a-b63d-f3af8efc76d1/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 18:32:29,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:32:29,993 INFO L262 TraceCheckSpWp]: Trace formula consists of 2439 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 18:32:30,001 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:32:30,094 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-12-02 18:32:30,095 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:32:30,095 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:32:30,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744742992] [2023-12-02 18:32:30,095 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 18:32:30,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639952245] [2023-12-02 18:32:30,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639952245] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:32:30,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:32:30,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 18:32:30,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89038657] [2023-12-02 18:32:30,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:32:30,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 18:32:30,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:32:30,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 18:32:30,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-12-02 18:32:30,098 INFO L87 Difference]: Start difference. First operand 126 states and 156 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 8 states have internal predecessors, (56), 5 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2023-12-02 18:32:30,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:32:30,693 INFO L93 Difference]: Finished difference Result 210 states and 259 transitions. [2023-12-02 18:32:30,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 18:32:30,694 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 8 states have internal predecessors, (56), 5 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) Word has length 120 [2023-12-02 18:32:30,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:32:30,696 INFO L225 Difference]: With dead ends: 210 [2023-12-02 18:32:30,696 INFO L226 Difference]: Without dead ends: 126 [2023-12-02 18:32:30,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-12-02 18:32:30,698 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 38 mSDsluCounter, 672 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 792 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 18:32:30,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 792 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 18:32:30,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-12-02 18:32:30,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2023-12-02 18:32:30,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 75 states have internal predecessors, (85), 35 states have call successors, (35), 17 states have call predecessors, (35), 18 states have return successors, (35), 34 states have call predecessors, (35), 34 states have call successors, (35) [2023-12-02 18:32:30,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 155 transitions. [2023-12-02 18:32:30,713 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 155 transitions. Word has length 120 [2023-12-02 18:32:30,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:32:30,713 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 155 transitions. [2023-12-02 18:32:30,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 8 states have internal predecessors, (56), 5 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2023-12-02 18:32:30,714 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 155 transitions. [2023-12-02 18:32:30,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-12-02 18:32:30,716 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:32:30,716 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:32:30,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95b96906-c0e5-4d7a-b63d-f3af8efc76d1/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-02 18:32:30,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95b96906-c0e5-4d7a-b63d-f3af8efc76d1/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:32:30,920 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:32:30,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:32:30,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1288177461, now seen corresponding path program 1 times [2023-12-02 18:32:30,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:32:30,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38371052] [2023-12-02 18:32:30,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:32:30,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:32:31,015 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 18:32:31,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [400769837] [2023-12-02 18:32:31,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:32:31,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:32:31,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95b96906-c0e5-4d7a-b63d-f3af8efc76d1/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:32:31,017 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95b96906-c0e5-4d7a-b63d-f3af8efc76d1/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:32:31,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95b96906-c0e5-4d7a-b63d-f3af8efc76d1/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 18:32:31,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:32:31,570 INFO L262 TraceCheckSpWp]: Trace formula consists of 2571 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-02 18:32:31,576 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:32:31,631 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-12-02 18:32:31,631 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:32:31,844 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-12-02 18:32:31,845 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:32:31,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38371052] [2023-12-02 18:32:31,845 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 18:32:31,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400769837] [2023-12-02 18:32:31,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400769837] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-02 18:32:31,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:32:31,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2023-12-02 18:32:31,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853611308] [2023-12-02 18:32:31,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:32:31,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 18:32:31,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:32:31,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 18:32:31,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-12-02 18:32:31,848 INFO L87 Difference]: Start difference. First operand 126 states and 155 transitions. Second operand has 6 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) [2023-12-02 18:32:32,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:32:32,221 INFO L93 Difference]: Finished difference Result 136 states and 169 transitions. [2023-12-02 18:32:32,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 18:32:32,221 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) Word has length 129 [2023-12-02 18:32:32,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:32:32,223 INFO L225 Difference]: With dead ends: 136 [2023-12-02 18:32:32,223 INFO L226 Difference]: Without dead ends: 134 [2023-12-02 18:32:32,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-12-02 18:32:32,225 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 6 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 18:32:32,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 636 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 18:32:32,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2023-12-02 18:32:32,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2023-12-02 18:32:32,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 76 states have (on average 1.1710526315789473) internal successors, (89), 80 states have internal predecessors, (89), 36 states have call successors, (36), 18 states have call predecessors, (36), 20 states have return successors, (41), 35 states have call predecessors, (41), 35 states have call successors, (41) [2023-12-02 18:32:32,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 166 transitions. [2023-12-02 18:32:32,236 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 166 transitions. Word has length 129 [2023-12-02 18:32:32,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:32:32,237 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 166 transitions. [2023-12-02 18:32:32,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) [2023-12-02 18:32:32,237 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 166 transitions. [2023-12-02 18:32:32,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-12-02 18:32:32,239 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:32:32,239 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:32:32,247 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95b96906-c0e5-4d7a-b63d-f3af8efc76d1/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-02 18:32:32,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95b96906-c0e5-4d7a-b63d-f3af8efc76d1/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:32:32,440 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:32:32,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:32:32,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1533142051, now seen corresponding path program 1 times [2023-12-02 18:32:32,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:32:32,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390321107] [2023-12-02 18:32:32,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:32:32,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:32:32,526 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 18:32:32,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1083038868] [2023-12-02 18:32:32,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:32:32,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:32:32,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95b96906-c0e5-4d7a-b63d-f3af8efc76d1/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:32:32,528 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95b96906-c0e5-4d7a-b63d-f3af8efc76d1/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:32:32,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95b96906-c0e5-4d7a-b63d-f3af8efc76d1/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 18:32:33,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:32:33,032 INFO L262 TraceCheckSpWp]: Trace formula consists of 2574 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-02 18:32:33,039 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:32:33,080 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-12-02 18:32:33,080 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:32:33,080 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:32:33,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390321107] [2023-12-02 18:32:33,081 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 18:32:33,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083038868] [2023-12-02 18:32:33,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083038868] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:32:33,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:32:33,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 18:32:33,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121925659] [2023-12-02 18:32:33,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:32:33,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 18:32:33,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:32:33,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 18:32:33,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 18:32:33,084 INFO L87 Difference]: Start difference. First operand 133 states and 166 transitions. Second operand has 6 states, 5 states have (on average 11.4) internal successors, (57), 6 states have internal predecessors, (57), 4 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2023-12-02 18:32:33,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:32:33,474 INFO L93 Difference]: Finished difference Result 217 states and 270 transitions. [2023-12-02 18:32:33,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 18:32:33,475 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 11.4) internal successors, (57), 6 states have internal predecessors, (57), 4 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 130 [2023-12-02 18:32:33,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:32:33,476 INFO L225 Difference]: With dead ends: 217 [2023-12-02 18:32:33,476 INFO L226 Difference]: Without dead ends: 133 [2023-12-02 18:32:33,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-12-02 18:32:33,478 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 8 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 18:32:33,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 625 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 18:32:33,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2023-12-02 18:32:33,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2023-12-02 18:32:33,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 76 states have (on average 1.1578947368421053) internal successors, (88), 80 states have internal predecessors, (88), 36 states have call successors, (36), 18 states have call predecessors, (36), 20 states have return successors, (41), 35 states have call predecessors, (41), 35 states have call successors, (41) [2023-12-02 18:32:33,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 165 transitions. [2023-12-02 18:32:33,489 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 165 transitions. Word has length 130 [2023-12-02 18:32:33,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:32:33,489 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 165 transitions. [2023-12-02 18:32:33,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 11.4) internal successors, (57), 6 states have internal predecessors, (57), 4 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2023-12-02 18:32:33,490 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 165 transitions. [2023-12-02 18:32:33,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-12-02 18:32:33,491 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:32:33,491 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:32:33,500 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95b96906-c0e5-4d7a-b63d-f3af8efc76d1/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 18:32:33,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95b96906-c0e5-4d7a-b63d-f3af8efc76d1/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:32:33,692 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:32:33,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:32:33,692 INFO L85 PathProgramCache]: Analyzing trace with hash -460980485, now seen corresponding path program 1 times [2023-12-02 18:32:33,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:32:33,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894858852] [2023-12-02 18:32:33,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:32:33,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:32:33,782 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 18:32:33,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [767488412] [2023-12-02 18:32:33,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:32:33,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:32:33,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95b96906-c0e5-4d7a-b63d-f3af8efc76d1/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:32:33,784 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95b96906-c0e5-4d7a-b63d-f3af8efc76d1/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:32:33,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95b96906-c0e5-4d7a-b63d-f3af8efc76d1/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 18:32:34,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:32:34,363 INFO L262 TraceCheckSpWp]: Trace formula consists of 2581 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-02 18:32:34,368 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:32:34,420 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-12-02 18:32:34,420 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:32:34,421 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:32:34,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894858852] [2023-12-02 18:32:34,421 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 18:32:34,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767488412] [2023-12-02 18:32:34,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767488412] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:32:34,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:32:34,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 18:32:34,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166864102] [2023-12-02 18:32:34,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:32:34,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 18:32:34,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:32:34,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 18:32:34,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 18:32:34,424 INFO L87 Difference]: Start difference. First operand 133 states and 165 transitions. Second operand has 7 states, 6 states have (on average 9.666666666666666) internal successors, (58), 7 states have internal predecessors, (58), 4 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2023-12-02 18:32:34,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:32:34,964 INFO L93 Difference]: Finished difference Result 218 states and 270 transitions. [2023-12-02 18:32:34,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 18:32:34,965 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 9.666666666666666) internal successors, (58), 7 states have internal predecessors, (58), 4 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 131 [2023-12-02 18:32:34,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:32:34,966 INFO L225 Difference]: With dead ends: 218 [2023-12-02 18:32:34,966 INFO L226 Difference]: Without dead ends: 134 [2023-12-02 18:32:34,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-12-02 18:32:34,968 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 8 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 18:32:34,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 625 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 18:32:34,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2023-12-02 18:32:34,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2023-12-02 18:32:34,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 77 states have (on average 1.155844155844156) internal successors, (89), 81 states have internal predecessors, (89), 36 states have call successors, (36), 18 states have call predecessors, (36), 20 states have return successors, (41), 35 states have call predecessors, (41), 35 states have call successors, (41) [2023-12-02 18:32:34,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 166 transitions. [2023-12-02 18:32:34,980 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 166 transitions. Word has length 131 [2023-12-02 18:32:34,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:32:34,981 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 166 transitions. [2023-12-02 18:32:34,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 9.666666666666666) internal successors, (58), 7 states have internal predecessors, (58), 4 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2023-12-02 18:32:34,982 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 166 transitions. [2023-12-02 18:32:34,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-12-02 18:32:34,984 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:32:34,984 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:32:34,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95b96906-c0e5-4d7a-b63d-f3af8efc76d1/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-02 18:32:35,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95b96906-c0e5-4d7a-b63d-f3af8efc76d1/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-12-02 18:32:35,188 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:32:35,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:32:35,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1107357061, now seen corresponding path program 1 times [2023-12-02 18:32:35,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:32:35,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710860749] [2023-12-02 18:32:35,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:32:35,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:32:35,273 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 18:32:35,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1434822631] [2023-12-02 18:32:35,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:32:35,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:32:35,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95b96906-c0e5-4d7a-b63d-f3af8efc76d1/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:32:35,275 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95b96906-c0e5-4d7a-b63d-f3af8efc76d1/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:32:35,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95b96906-c0e5-4d7a-b63d-f3af8efc76d1/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 18:32:35,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:32:35,750 INFO L262 TraceCheckSpWp]: Trace formula consists of 2600 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-02 18:32:35,755 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:32:35,780 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-12-02 18:32:35,781 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:32:35,781 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:32:35,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710860749] [2023-12-02 18:32:35,781 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 18:32:35,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434822631] [2023-12-02 18:32:35,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434822631] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:32:35,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:32:35,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 18:32:35,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170919467] [2023-12-02 18:32:35,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:32:35,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 18:32:35,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:32:35,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 18:32:35,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 18:32:35,784 INFO L87 Difference]: Start difference. First operand 134 states and 166 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2023-12-02 18:32:36,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:32:36,179 INFO L93 Difference]: Finished difference Result 229 states and 292 transitions. [2023-12-02 18:32:36,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 18:32:36,180 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 132 [2023-12-02 18:32:36,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:32:36,181 INFO L225 Difference]: With dead ends: 229 [2023-12-02 18:32:36,181 INFO L226 Difference]: Without dead ends: 138 [2023-12-02 18:32:36,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:32:36,182 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 5 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 18:32:36,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 360 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 18:32:36,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2023-12-02 18:32:36,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 135. [2023-12-02 18:32:36,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 78 states have (on average 1.1538461538461537) internal successors, (90), 82 states have internal predecessors, (90), 36 states have call successors, (36), 18 states have call predecessors, (36), 20 states have return successors, (41), 35 states have call predecessors, (41), 35 states have call successors, (41) [2023-12-02 18:32:36,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 167 transitions. [2023-12-02 18:32:36,193 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 167 transitions. Word has length 132 [2023-12-02 18:32:36,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:32:36,194 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 167 transitions. [2023-12-02 18:32:36,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2023-12-02 18:32:36,194 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 167 transitions. [2023-12-02 18:32:36,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-12-02 18:32:36,196 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:32:36,197 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:32:36,204 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95b96906-c0e5-4d7a-b63d-f3af8efc76d1/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 18:32:36,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95b96906-c0e5-4d7a-b63d-f3af8efc76d1/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:32:36,397 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:32:36,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:32:36,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1428839579, now seen corresponding path program 1 times [2023-12-02 18:32:36,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:32:36,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059181735] [2023-12-02 18:32:36,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:32:36,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:32:36,477 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 18:32:36,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2020793388] [2023-12-02 18:32:36,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:32:36,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:32:36,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95b96906-c0e5-4d7a-b63d-f3af8efc76d1/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:32:36,479 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95b96906-c0e5-4d7a-b63d-f3af8efc76d1/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:32:36,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95b96906-c0e5-4d7a-b63d-f3af8efc76d1/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 18:32:37,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:32:37,162 INFO L262 TraceCheckSpWp]: Trace formula consists of 2606 conjuncts, 134 conjunts are in the unsatisfiable core [2023-12-02 18:32:37,171 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:32:37,201 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 18:32:37,763 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:32:37,764 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 38 treesize of output 29 [2023-12-02 18:32:39,893 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 25 [2023-12-02 18:33:01,807 INFO L378 Elim1Store]: Elim1 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 53 treesize of output 47 [2023-12-02 18:33:01,816 INFO L378 Elim1Store]: Elim1 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 47 treesize of output 41 [2023-12-02 18:33:09,018 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 37 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-02 18:33:09,018 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:33:12,418 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2023-12-02 18:33:12,418 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:33:12,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059181735] [2023-12-02 18:33:12,418 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 18:33:12,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020793388] [2023-12-02 18:33:12,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020793388] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:33:12,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [200810394] [2023-12-02 18:33:12,441 INFO L159 IcfgInterpreter]: Started Sifa with 89 locations of interest [2023-12-02 18:33:12,441 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:33:12,444 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:33:12,448 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:33:12,449 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:37:17,133 WARN L293 SmtUtils]: Spent 5.52s on a formula simplification that was a NOOP. DAG size: 2281 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-12-02 18:37:22,513 WARN L293 SmtUtils]: Spent 5.34s on a formula simplification that was a NOOP. DAG size: 2281 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-12-02 18:38:33,019 INFO L197 IcfgInterpreter]: Interpreting procedure aws_array_list_clean_up with input of size 300 for LOIs [2023-12-02 18:38:36,614 INFO L197 IcfgInterpreter]: Interpreting procedure aws_is_mem_zeroed with input of size 282 for LOIs [2023-12-02 18:38:38,822 INFO L197 IcfgInterpreter]: Interpreting procedure aws_array_list_is_bounded with input of size 2235 for LOIs [2023-12-02 18:39:36,127 INFO L197 IcfgInterpreter]: Interpreting procedure aws_priority_queue_is_valid with input of size 231 for LOIs [2023-12-02 18:39:40,613 INFO L197 IcfgInterpreter]: Interpreting procedure aws_array_list_is_valid with input of size 240 for LOIs [2023-12-02 18:39:43,405 INFO L197 IcfgInterpreter]: Interpreting procedure aws_mul_size_checked with input of size 290 for LOIs [2023-12-02 18:39:46,936 INFO L197 IcfgInterpreter]: Interpreting procedure __CPROVER_overflow_mult with input of size 278 for LOIs [2023-12-02 18:39:47,273 INFO L197 IcfgInterpreter]: Interpreting procedure ensure_array_list_has_allocated_data_member with input of size 77 for LOIs [2023-12-02 18:39:47,793 INFO L197 IcfgInterpreter]: Interpreting procedure can_fail_allocator with input of size 38 for LOIs [2023-12-02 18:39:47,799 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 108 for LOIs [2023-12-02 18:39:47,881 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:40:52,279 WARN L293 SmtUtils]: Spent 53.19s on a formula simplification. DAG size of input: 2154 DAG size of output: 2152 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)