./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_hash_table_eq_harness_negated.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_8929e1da-b58f-4cdc-9bd1-54b2d90366cd/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8929e1da-b58f-4cdc-9bd1-54b2d90366cd/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_8929e1da-b58f-4cdc-9bd1-54b2d90366cd/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8929e1da-b58f-4cdc-9bd1-54b2d90366cd/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_hash_table_eq_harness_negated.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8929e1da-b58f-4cdc-9bd1-54b2d90366cd/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_8929e1da-b58f-4cdc-9bd1-54b2d90366cd/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 418444d45b0c7850a9989314dcd5f57e0b0ef1cb83134fc862bc4bb0b0db0821 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 19:11:17,016 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 19:11:17,088 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8929e1da-b58f-4cdc-9bd1-54b2d90366cd/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-12-02 19:11:17,093 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 19:11:17,094 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 19:11:17,117 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 19:11:17,118 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 19:11:17,118 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 19:11:17,119 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 19:11:17,120 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 19:11:17,120 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 19:11:17,121 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 19:11:17,121 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 19:11:17,122 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 19:11:17,123 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 19:11:17,123 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 19:11:17,124 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 19:11:17,124 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 19:11:17,125 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 19:11:17,126 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 19:11:17,126 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 19:11:17,127 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 19:11:17,128 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 19:11:17,128 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 19:11:17,129 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 19:11:17,129 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 19:11:17,130 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 19:11:17,130 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 19:11:17,130 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 19:11:17,131 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 19:11:17,131 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 19:11:17,132 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 19:11:17,132 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 19:11:17,132 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 19:11:17,133 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 19:11:17,133 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 19:11:17,133 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 19:11:17,133 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 19:11:17,133 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 19:11:17,134 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 19:11:17,134 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 19:11:17,134 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 19:11:17,134 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 19:11:17,135 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 19:11:17,135 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_8929e1da-b58f-4cdc-9bd1-54b2d90366cd/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8929e1da-b58f-4cdc-9bd1-54b2d90366cd/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 418444d45b0c7850a9989314dcd5f57e0b0ef1cb83134fc862bc4bb0b0db0821 [2023-12-02 19:11:17,381 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 19:11:17,406 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 19:11:17,409 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 19:11:17,410 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 19:11:17,411 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 19:11:17,412 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8929e1da-b58f-4cdc-9bd1-54b2d90366cd/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/aws-c-common/aws_hash_table_eq_harness_negated.i [2023-12-02 19:11:20,460 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 19:11:20,947 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 19:11:20,948 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8929e1da-b58f-4cdc-9bd1-54b2d90366cd/sv-benchmarks/c/aws-c-common/aws_hash_table_eq_harness_negated.i [2023-12-02 19:11:20,985 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8929e1da-b58f-4cdc-9bd1-54b2d90366cd/bin/utaipan-verify-nQ1chXbOIh/data/05b1fd9e6/c3801063c38b489d81d6075f85f0f218/FLAG0e7376914 [2023-12-02 19:11:21,057 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8929e1da-b58f-4cdc-9bd1-54b2d90366cd/bin/utaipan-verify-nQ1chXbOIh/data/05b1fd9e6/c3801063c38b489d81d6075f85f0f218 [2023-12-02 19:11:21,061 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 19:11:21,062 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 19:11:21,064 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 19:11:21,064 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 19:11:21,069 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 19:11:21,070 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 07:11:21" (1/1) ... [2023-12-02 19:11:21,071 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@222e650e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:11:21, skipping insertion in model container [2023-12-02 19:11:21,071 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 07:11:21" (1/1) ... [2023-12-02 19:11:21,212 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 19:11:21,519 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_8929e1da-b58f-4cdc-9bd1-54b2d90366cd/sv-benchmarks/c/aws-c-common/aws_hash_table_eq_harness_negated.i[4491,4504] [2023-12-02 19:11:21,530 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_8929e1da-b58f-4cdc-9bd1-54b2d90366cd/sv-benchmarks/c/aws-c-common/aws_hash_table_eq_harness_negated.i[4551,4564] [2023-12-02 19:11:22,814 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 19:11:22,815 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 19:11:22,816 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 19:11:22,817 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 19:11:22,819 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 19:11:22,837 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 19:11:22,838 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 19:11:22,862 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 19:11:22,863 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 19:11:22,866 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 19:11:22,867 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 19:11:22,868 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 19:11:22,869 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 19:11:23,407 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-12-02 19:11:23,408 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-12-02 19:11:23,409 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-12-02 19:11:23,410 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-12-02 19:11:23,412 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-12-02 19:11:23,413 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-12-02 19:11:23,414 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-12-02 19:11:23,415 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-12-02 19:11:23,416 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-12-02 19:11:23,417 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-12-02 19:11:24,006 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 19:11:24,006 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 19:11:24,032 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 19:11:24,034 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 19:11:24,041 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 19:11:24,042 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 19:11:24,058 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 19:11:24,059 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 19:11:24,060 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 19:11:24,060 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 19:11:24,060 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 19:11:24,061 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 19:11:24,061 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 19:11:24,098 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 19:11:24,135 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 19:11:24,148 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_8929e1da-b58f-4cdc-9bd1-54b2d90366cd/sv-benchmarks/c/aws-c-common/aws_hash_table_eq_harness_negated.i[4491,4504] [2023-12-02 19:11:24,149 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_8929e1da-b58f-4cdc-9bd1-54b2d90366cd/sv-benchmarks/c/aws-c-common/aws_hash_table_eq_harness_negated.i[4551,4564] [2023-12-02 19:11:24,186 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 19:11:24,186 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 19:11:24,187 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 19:11:24,187 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 19:11:24,188 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 19:11:24,194 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 19:11:24,195 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 19:11:24,196 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 19:11:24,197 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 19:11:24,198 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 19:11:24,199 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 19:11:24,199 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 19:11:24,200 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 19:11:24,234 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-12-02 19:11:24,235 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-12-02 19:11:24,236 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-12-02 19:11:24,237 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-12-02 19:11:24,238 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-12-02 19:11:24,238 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-12-02 19:11:24,239 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-12-02 19:11:24,240 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-12-02 19:11:24,240 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-12-02 19:11:24,241 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-12-02 19:11:24,316 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : : "r"(pBuf) : "memory"); [7526-7537] [2023-12-02 19:11:24,390 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 19:11:24,390 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 19:11:24,397 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 19:11:24,398 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 19:11:24,401 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 19:11:24,401 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 19:11:24,410 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 19:11:24,411 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 19:11:24,412 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 19:11:24,412 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 19:11:24,412 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 19:11:24,413 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 19:11:24,413 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 19:11:24,431 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 19:11:24,648 WARN L675 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 19:11:24,648 WARN L675 CHandler]: The function equals_fn is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 19:11:24,648 WARN L675 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 19:11:24,649 WARN L675 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 19:11:24,649 WARN L675 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 19:11:24,649 WARN L675 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 19:11:24,649 WARN L675 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 19:11:24,649 WARN L675 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 19:11:24,649 WARN L675 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 19:11:24,649 WARN L675 CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 19:11:24,649 WARN L675 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 19:11:24,649 WARN L675 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 19:11:24,650 WARN L675 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 19:11:24,650 WARN L675 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 19:11:24,650 WARN L675 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 19:11:24,650 WARN L675 CHandler]: The function callback is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 19:11:24,650 WARN L675 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 19:11:24,650 WARN L675 CHandler]: The function aws_array_list_ensure_capacity is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 19:11:24,658 INFO L206 MainTranslator]: Completed translation [2023-12-02 19:11:24,658 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:11:24 WrapperNode [2023-12-02 19:11:24,658 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 19:11:24,660 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 19:11:24,660 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 19:11:24,660 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 19:11:24,668 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:11:24" (1/1) ... [2023-12-02 19:11:24,784 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:11:24" (1/1) ... [2023-12-02 19:11:24,866 INFO L138 Inliner]: procedures = 772, calls = 2456, calls flagged for inlining = 68, calls inlined = 18, statements flattened = 968 [2023-12-02 19:11:24,866 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 19:11:24,867 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 19:11:24,867 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 19:11:24,868 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 19:11:24,879 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:11:24" (1/1) ... [2023-12-02 19:11:24,880 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:11:24" (1/1) ... [2023-12-02 19:11:24,894 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:11:24" (1/1) ... [2023-12-02 19:11:24,894 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:11:24" (1/1) ... [2023-12-02 19:11:24,939 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:11:24" (1/1) ... [2023-12-02 19:11:24,947 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:11:24" (1/1) ... [2023-12-02 19:11:24,959 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:11:24" (1/1) ... [2023-12-02 19:11:24,968 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:11:24" (1/1) ... [2023-12-02 19:11:24,985 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 19:11:24,986 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 19:11:24,986 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 19:11:24,986 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 19:11:24,987 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:11:24" (1/1) ... [2023-12-02 19:11:24,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 19:11:25,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8929e1da-b58f-4cdc-9bd1-54b2d90366cd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:11:25,022 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8929e1da-b58f-4cdc-9bd1-54b2d90366cd/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 19:11:25,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8929e1da-b58f-4cdc-9bd1-54b2d90366cd/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 19:11:25,071 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2023-12-02 19:11:25,072 INFO L130 BoogieDeclarations]: Found specification of procedure save_byte_from_hash_table [2023-12-02 19:11:25,072 INFO L138 BoogieDeclarations]: Found implementation of procedure save_byte_from_hash_table [2023-12-02 19:11:25,072 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 19:11:25,072 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2023-12-02 19:11:25,072 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2023-12-02 19:11:25,072 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-02 19:11:25,073 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-02 19:11:25,073 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_is_valid [2023-12-02 19:11:25,073 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_is_valid [2023-12-02 19:11:25,073 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-02 19:11:25,073 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 19:11:25,073 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-12-02 19:11:25,073 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 19:11:25,073 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 19:11:25,074 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2023-12-02 19:11:25,074 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2023-12-02 19:11:25,074 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2023-12-02 19:11:25,074 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2023-12-02 19:11:25,074 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 19:11:25,075 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_plus [2023-12-02 19:11:25,075 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_plus [2023-12-02 19:11:25,075 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-12-02 19:11:25,075 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2023-12-02 19:11:25,075 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2023-12-02 19:11:25,075 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 19:11:25,075 INFO L130 BoogieDeclarations]: Found specification of procedure s_hash_for [2023-12-02 19:11:25,075 INFO L138 BoogieDeclarations]: Found implementation of procedure s_hash_for [2023-12-02 19:11:25,076 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_power_of_two [2023-12-02 19:11:25,076 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_power_of_two [2023-12-02 19:11:25,076 INFO L130 BoogieDeclarations]: Found specification of procedure s_hash_keys_eq [2023-12-02 19:11:25,076 INFO L138 BoogieDeclarations]: Found implementation of procedure s_hash_keys_eq [2023-12-02 19:11:25,076 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_uninterpreted_equals [2023-12-02 19:11:25,076 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_uninterpreted_equals [2023-12-02 19:11:25,077 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 19:11:25,077 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_table_get_entry_count [2023-12-02 19:11:25,077 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_table_get_entry_count [2023-12-02 19:11:25,077 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_required_bytes [2023-12-02 19:11:25,077 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_required_bytes [2023-12-02 19:11:25,077 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_uninterpreted_hasher [2023-12-02 19:11:25,077 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_uninterpreted_hasher [2023-12-02 19:11:25,078 INFO L130 BoogieDeclarations]: Found specification of procedure s_safe_eq_check [2023-12-02 19:11:25,078 INFO L138 BoogieDeclarations]: Found implementation of procedure s_safe_eq_check [2023-12-02 19:11:25,078 INFO L130 BoogieDeclarations]: Found specification of procedure s_find_entry [2023-12-02 19:11:25,078 INFO L138 BoogieDeclarations]: Found implementation of procedure s_find_entry [2023-12-02 19:11:25,078 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-02 19:11:25,078 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-02 19:11:25,079 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_table_is_valid [2023-12-02 19:11:25,079 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_table_is_valid [2023-12-02 19:11:25,079 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-12-02 19:11:25,079 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_allocated_hash_table [2023-12-02 19:11:25,079 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_allocated_hash_table [2023-12-02 19:11:25,079 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2023-12-02 19:11:25,080 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2023-12-02 19:11:25,080 INFO L130 BoogieDeclarations]: Found specification of procedure aws_add_size_checked [2023-12-02 19:11:25,080 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_add_size_checked [2023-12-02 19:11:25,080 INFO L130 BoogieDeclarations]: Found specification of procedure check_hash_table_unchanged [2023-12-02 19:11:25,080 INFO L138 BoogieDeclarations]: Found implementation of procedure check_hash_table_unchanged [2023-12-02 19:11:25,081 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2023-12-02 19:11:25,081 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2023-12-02 19:11:25,081 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 19:11:25,435 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 19:11:25,439 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 19:11:25,568 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##5: assume !true; [2023-12-02 19:11:25,651 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume !true; [2023-12-02 19:11:26,427 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##39: assume !true; [2023-12-02 19:11:26,427 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##28: assume !true; [2023-12-02 19:11:26,427 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume !true; [2023-12-02 19:11:26,427 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##60: assume !true; [2023-12-02 19:11:26,427 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##51: assume !true; [2023-12-02 19:11:26,459 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 19:11:26,714 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 19:11:26,714 INFO L309 CfgBuilder]: Removed 16 assume(true) statements. [2023-12-02 19:11:26,716 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:11:26 BoogieIcfgContainer [2023-12-02 19:11:26,716 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 19:11:26,719 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 19:11:26,719 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 19:11:26,722 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 19:11:26,722 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 07:11:21" (1/3) ... [2023-12-02 19:11:26,723 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c12b42c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 07:11:26, skipping insertion in model container [2023-12-02 19:11:26,723 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:11:24" (2/3) ... [2023-12-02 19:11:26,724 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c12b42c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 07:11:26, skipping insertion in model container [2023-12-02 19:11:26,724 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:11:26" (3/3) ... [2023-12-02 19:11:26,725 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_hash_table_eq_harness_negated.i [2023-12-02 19:11:26,747 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 19:11:26,747 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 19:11:26,809 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 19:11:26,817 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;@39b5961a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 19:11:26,817 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 19:11:26,823 INFO L276 IsEmpty]: Start isEmpty. Operand has 248 states, 140 states have (on average 1.2214285714285715) internal successors, (171), 134 states have internal predecessors, (171), 89 states have call successors, (89), 24 states have call predecessors, (89), 24 states have return successors, (89), 89 states have call predecessors, (89), 89 states have call successors, (89) [2023-12-02 19:11:26,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2023-12-02 19:11:26,846 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:11:26,847 INFO L195 NwaCegarLoop]: trace histogram [17, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-12-02 19:11:26,847 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:11:26,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:11:26,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1114410107, now seen corresponding path program 1 times [2023-12-02 19:11:26,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:11:26,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394020493] [2023-12-02 19:11:26,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:11:26,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:11:27,338 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 19:11:27,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2131555791] [2023-12-02 19:11:27,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:11:27,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:11:27,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8929e1da-b58f-4cdc-9bd1-54b2d90366cd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:11:27,343 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8929e1da-b58f-4cdc-9bd1-54b2d90366cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:11:27,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8929e1da-b58f-4cdc-9bd1-54b2d90366cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 19:11:28,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:11:28,278 INFO L262 TraceCheckSpWp]: Trace formula consists of 3156 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 19:11:28,299 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:11:28,415 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2023-12-02 19:11:28,415 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 19:11:28,416 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:11:28,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394020493] [2023-12-02 19:11:28,416 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 19:11:28,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131555791] [2023-12-02 19:11:28,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131555791] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:11:28,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:11:28,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 19:11:28,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881963446] [2023-12-02 19:11:28,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:11:28,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 19:11:28,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:11:28,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 19:11:28,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 19:11:28,464 INFO L87 Difference]: Start difference. First operand has 248 states, 140 states have (on average 1.2214285714285715) internal successors, (171), 134 states have internal predecessors, (171), 89 states have call successors, (89), 24 states have call predecessors, (89), 24 states have return successors, (89), 89 states have call predecessors, (89), 89 states have call successors, (89) Second operand has 5 states, 4 states have (on average 13.75) internal successors, (55), 5 states have internal predecessors, (55), 2 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (39), 3 states have call predecessors, (39), 2 states have call successors, (39) [2023-12-02 19:11:29,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:11:29,108 INFO L93 Difference]: Finished difference Result 498 states and 730 transitions. [2023-12-02 19:11:29,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 19:11:29,111 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 13.75) internal successors, (55), 5 states have internal predecessors, (55), 2 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (39), 3 states have call predecessors, (39), 2 states have call successors, (39) Word has length 213 [2023-12-02 19:11:29,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:11:29,125 INFO L225 Difference]: With dead ends: 498 [2023-12-02 19:11:29,125 INFO L226 Difference]: Without dead ends: 250 [2023-12-02 19:11:29,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 209 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 19:11:29,138 INFO L413 NwaCegarLoop]: 304 mSDtfsCounter, 1 mSDsluCounter, 908 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 1212 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 19:11:29,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 1212 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 19:11:29,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2023-12-02 19:11:29,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 250. [2023-12-02 19:11:29,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 135 states have (on average 1.2074074074074075) internal successors, (163), 136 states have internal predecessors, (163), 89 states have call successors, (89), 24 states have call predecessors, (89), 25 states have return successors, (89), 89 states have call predecessors, (89), 88 states have call successors, (89) [2023-12-02 19:11:29,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 341 transitions. [2023-12-02 19:11:29,219 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 341 transitions. Word has length 213 [2023-12-02 19:11:29,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:11:29,221 INFO L495 AbstractCegarLoop]: Abstraction has 250 states and 341 transitions. [2023-12-02 19:11:29,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 13.75) internal successors, (55), 5 states have internal predecessors, (55), 2 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (39), 3 states have call predecessors, (39), 2 states have call successors, (39) [2023-12-02 19:11:29,222 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 341 transitions. [2023-12-02 19:11:29,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2023-12-02 19:11:29,228 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:11:29,229 INFO L195 NwaCegarLoop]: trace histogram [17, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-12-02 19:11:29,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8929e1da-b58f-4cdc-9bd1-54b2d90366cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 19:11:29,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8929e1da-b58f-4cdc-9bd1-54b2d90366cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-12-02 19:11:29,430 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:11:29,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:11:29,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1145489787, now seen corresponding path program 1 times [2023-12-02 19:11:29,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:11:29,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760701195] [2023-12-02 19:11:29,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:11:29,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:11:29,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:11:32,609 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 458 trivial. 0 not checked. [2023-12-02 19:11:32,609 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:11:32,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760701195] [2023-12-02 19:11:32,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760701195] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:11:32,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578536879] [2023-12-02 19:11:32,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:11:32,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:11:32,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8929e1da-b58f-4cdc-9bd1-54b2d90366cd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:11:32,613 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8929e1da-b58f-4cdc-9bd1-54b2d90366cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:11:32,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8929e1da-b58f-4cdc-9bd1-54b2d90366cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 19:11:33,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:11:33,527 INFO L262 TraceCheckSpWp]: Trace formula consists of 3152 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-02 19:11:33,541 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:11:33,636 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 221 proven. 0 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2023-12-02 19:11:33,636 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 19:11:33,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578536879] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:11:33,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 19:11:33,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2023-12-02 19:11:33,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38679236] [2023-12-02 19:11:33,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:11:33,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 19:11:33,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:11:33,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 19:11:33,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2023-12-02 19:11:33,641 INFO L87 Difference]: Start difference. First operand 250 states and 341 transitions. Second operand has 6 states, 3 states have (on average 23.0) internal successors, (69), 5 states have internal predecessors, (69), 3 states have call successors, (45), 2 states have call predecessors, (45), 4 states have return successors, (44), 3 states have call predecessors, (44), 3 states have call successors, (44) [2023-12-02 19:11:34,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:11:34,206 INFO L93 Difference]: Finished difference Result 499 states and 696 transitions. [2023-12-02 19:11:34,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 19:11:34,207 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 3 states have (on average 23.0) internal successors, (69), 5 states have internal predecessors, (69), 3 states have call successors, (45), 2 states have call predecessors, (45), 4 states have return successors, (44), 3 states have call predecessors, (44), 3 states have call successors, (44) Word has length 229 [2023-12-02 19:11:34,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:11:34,214 INFO L225 Difference]: With dead ends: 499 [2023-12-02 19:11:34,214 INFO L226 Difference]: Without dead ends: 252 [2023-12-02 19:11:34,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2023-12-02 19:11:34,218 INFO L413 NwaCegarLoop]: 285 mSDtfsCounter, 0 mSDsluCounter, 1116 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1401 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 19:11:34,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1401 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 19:11:34,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2023-12-02 19:11:34,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 252. [2023-12-02 19:11:34,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 136 states have (on average 1.2058823529411764) internal successors, (164), 138 states have internal predecessors, (164), 89 states have call successors, (89), 24 states have call predecessors, (89), 26 states have return successors, (106), 89 states have call predecessors, (106), 88 states have call successors, (106) [2023-12-02 19:11:34,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 359 transitions. [2023-12-02 19:11:34,259 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 359 transitions. Word has length 229 [2023-12-02 19:11:34,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:11:34,260 INFO L495 AbstractCegarLoop]: Abstraction has 252 states and 359 transitions. [2023-12-02 19:11:34,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 3 states have (on average 23.0) internal successors, (69), 5 states have internal predecessors, (69), 3 states have call successors, (45), 2 states have call predecessors, (45), 4 states have return successors, (44), 3 states have call predecessors, (44), 3 states have call successors, (44) [2023-12-02 19:11:34,261 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 359 transitions. [2023-12-02 19:11:34,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2023-12-02 19:11:34,266 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:11:34,267 INFO L195 NwaCegarLoop]: trace histogram [17, 7, 7, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-12-02 19:11:34,280 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8929e1da-b58f-4cdc-9bd1-54b2d90366cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 19:11:34,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8929e1da-b58f-4cdc-9bd1-54b2d90366cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:11:34,468 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:11:34,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:11:34,468 INFO L85 PathProgramCache]: Analyzing trace with hash 45152394, now seen corresponding path program 1 times [2023-12-02 19:11:34,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:11:34,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589266423] [2023-12-02 19:11:34,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:11:34,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:11:34,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:11:36,685 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 472 trivial. 0 not checked. [2023-12-02 19:11:36,686 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:11:36,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589266423] [2023-12-02 19:11:36,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589266423] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:11:36,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957085537] [2023-12-02 19:11:36,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:11:36,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:11:36,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8929e1da-b58f-4cdc-9bd1-54b2d90366cd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:11:36,688 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8929e1da-b58f-4cdc-9bd1-54b2d90366cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:11:36,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8929e1da-b58f-4cdc-9bd1-54b2d90366cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 19:11:37,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:11:37,486 INFO L262 TraceCheckSpWp]: Trace formula consists of 3176 conjuncts, 35 conjunts are in the unsatisfiable core [2023-12-02 19:11:37,500 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:11:37,680 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 19:11:38,070 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 201 proven. 0 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2023-12-02 19:11:38,070 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 19:11:38,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957085537] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:11:38,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 19:11:38,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [8] total 20 [2023-12-02 19:11:38,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45821645] [2023-12-02 19:11:38,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:11:38,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-02 19:11:38,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:11:38,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-02 19:11:38,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2023-12-02 19:11:38,075 INFO L87 Difference]: Start difference. First operand 252 states and 359 transitions. Second operand has 14 states, 9 states have (on average 8.0) internal successors, (72), 11 states have internal predecessors, (72), 6 states have call successors, (46), 3 states have call predecessors, (46), 6 states have return successors, (45), 6 states have call predecessors, (45), 6 states have call successors, (45) [2023-12-02 19:11:42,218 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 19:11:44,300 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 19:11:46,338 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 19:11:48,422 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 19:11:50,442 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 19:11:52,566 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 19:11:54,595 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 19:11:56,949 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 19:11:59,208 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 19:12:01,270 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 19:12:03,285 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 19:12:05,289 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 19:12:07,309 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 19:12:09,312 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 19:12:11,358 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 19:12:13,396 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 19:12:15,448 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 19:12:17,543 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 19:12:19,587 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 19:12:21,627 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 19:12:23,682 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 19:12:23,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:12:23,831 INFO L93 Difference]: Finished difference Result 581 states and 809 transitions. [2023-12-02 19:12:23,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-02 19:12:23,832 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 9 states have (on average 8.0) internal successors, (72), 11 states have internal predecessors, (72), 6 states have call successors, (46), 3 states have call predecessors, (46), 6 states have return successors, (45), 6 states have call predecessors, (45), 6 states have call successors, (45) Word has length 235 [2023-12-02 19:12:23,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:12:23,835 INFO L225 Difference]: With dead ends: 581 [2023-12-02 19:12:23,835 INFO L226 Difference]: Without dead ends: 325 [2023-12-02 19:12:23,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2023-12-02 19:12:23,838 INFO L413 NwaCegarLoop]: 305 mSDtfsCounter, 128 mSDsluCounter, 1985 mSDsCounter, 0 mSdLazyCounter, 881 mSolverCounterSat, 26 mSolverCounterUnsat, 21 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 45.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 2290 SdHoareTripleChecker+Invalid, 928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 881 IncrementalHoareTripleChecker+Invalid, 21 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 45.5s IncrementalHoareTripleChecker+Time [2023-12-02 19:12:23,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 2290 Invalid, 928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 881 Invalid, 21 Unknown, 0 Unchecked, 45.5s Time] [2023-12-02 19:12:23,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2023-12-02 19:12:23,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 322. [2023-12-02 19:12:23,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 175 states have (on average 1.1828571428571428) internal successors, (207), 176 states have internal predecessors, (207), 108 states have call successors, (108), 38 states have call predecessors, (108), 38 states have return successors, (113), 107 states have call predecessors, (113), 107 states have call successors, (113) [2023-12-02 19:12:23,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 428 transitions. [2023-12-02 19:12:23,879 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 428 transitions. Word has length 235 [2023-12-02 19:12:23,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:12:23,879 INFO L495 AbstractCegarLoop]: Abstraction has 322 states and 428 transitions. [2023-12-02 19:12:23,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 9 states have (on average 8.0) internal successors, (72), 11 states have internal predecessors, (72), 6 states have call successors, (46), 3 states have call predecessors, (46), 6 states have return successors, (45), 6 states have call predecessors, (45), 6 states have call successors, (45) [2023-12-02 19:12:23,880 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 428 transitions. [2023-12-02 19:12:23,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2023-12-02 19:12:23,885 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:12:23,886 INFO L195 NwaCegarLoop]: trace histogram [17, 7, 7, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:12:23,899 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8929e1da-b58f-4cdc-9bd1-54b2d90366cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 19:12:24,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8929e1da-b58f-4cdc-9bd1-54b2d90366cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:12:24,087 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:12:24,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:12:24,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1174474153, now seen corresponding path program 1 times [2023-12-02 19:12:24,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:12:24,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411920701] [2023-12-02 19:12:24,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:12:24,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:12:24,249 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 19:12:24,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [687126315] [2023-12-02 19:12:24,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:12:24,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:12:24,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8929e1da-b58f-4cdc-9bd1-54b2d90366cd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:12:24,253 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8929e1da-b58f-4cdc-9bd1-54b2d90366cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:12:24,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8929e1da-b58f-4cdc-9bd1-54b2d90366cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 19:12:25,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:12:25,128 INFO L262 TraceCheckSpWp]: Trace formula consists of 3311 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-02 19:12:25,139 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:12:25,188 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 239 proven. 0 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2023-12-02 19:12:25,188 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 19:12:25,189 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:12:25,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411920701] [2023-12-02 19:12:25,189 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 19:12:25,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687126315] [2023-12-02 19:12:25,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687126315] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:12:25,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:12:25,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 19:12:25,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866722366] [2023-12-02 19:12:25,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:12:25,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 19:12:25,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:12:25,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 19:12:25,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 19:12:25,193 INFO L87 Difference]: Start difference. First operand 322 states and 428 transitions. Second operand has 6 states, 3 states have (on average 26.0) internal successors, (78), 5 states have internal predecessors, (78), 3 states have call successors, (43), 2 states have call predecessors, (43), 4 states have return successors, (42), 3 states have call predecessors, (42), 3 states have call successors, (42) [2023-12-02 19:12:25,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:12:25,776 INFO L93 Difference]: Finished difference Result 545 states and 747 transitions. [2023-12-02 19:12:25,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 19:12:25,777 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 3 states have (on average 26.0) internal successors, (78), 5 states have internal predecessors, (78), 3 states have call successors, (43), 2 states have call predecessors, (43), 4 states have return successors, (42), 3 states have call predecessors, (42), 3 states have call successors, (42) Word has length 244 [2023-12-02 19:12:25,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:12:25,781 INFO L225 Difference]: With dead ends: 545 [2023-12-02 19:12:25,781 INFO L226 Difference]: Without dead ends: 324 [2023-12-02 19:12:25,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 19:12:25,783 INFO L413 NwaCegarLoop]: 285 mSDtfsCounter, 0 mSDsluCounter, 1116 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1401 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 19:12:25,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1401 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 19:12:25,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2023-12-02 19:12:25,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 324. [2023-12-02 19:12:25,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 176 states have (on average 1.1818181818181819) internal successors, (208), 178 states have internal predecessors, (208), 108 states have call successors, (108), 38 states have call predecessors, (108), 39 states have return successors, (129), 107 states have call predecessors, (129), 107 states have call successors, (129) [2023-12-02 19:12:25,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 445 transitions. [2023-12-02 19:12:25,821 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 445 transitions. Word has length 244 [2023-12-02 19:12:25,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:12:25,823 INFO L495 AbstractCegarLoop]: Abstraction has 324 states and 445 transitions. [2023-12-02 19:12:25,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 3 states have (on average 26.0) internal successors, (78), 5 states have internal predecessors, (78), 3 states have call successors, (43), 2 states have call predecessors, (43), 4 states have return successors, (42), 3 states have call predecessors, (42), 3 states have call successors, (42) [2023-12-02 19:12:25,823 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 445 transitions. [2023-12-02 19:12:25,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2023-12-02 19:12:25,827 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:12:25,827 INFO L195 NwaCegarLoop]: trace histogram [17, 7, 7, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2023-12-02 19:12:25,841 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8929e1da-b58f-4cdc-9bd1-54b2d90366cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 19:12:26,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8929e1da-b58f-4cdc-9bd1-54b2d90366cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:12:26,037 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:12:26,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:12:26,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1887893483, now seen corresponding path program 1 times [2023-12-02 19:12:26,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:12:26,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894071877] [2023-12-02 19:12:26,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:12:26,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:12:26,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:12:27,965 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2023-12-02 19:12:27,965 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:12:27,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894071877] [2023-12-02 19:12:27,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894071877] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:12:27,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715675672] [2023-12-02 19:12:27,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:12:27,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:12:27,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8929e1da-b58f-4cdc-9bd1-54b2d90366cd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:12:27,967 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8929e1da-b58f-4cdc-9bd1-54b2d90366cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:12:27,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8929e1da-b58f-4cdc-9bd1-54b2d90366cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 19:12:28,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:12:28,750 INFO L262 TraceCheckSpWp]: Trace formula consists of 3231 conjuncts, 33 conjunts are in the unsatisfiable core [2023-12-02 19:12:28,759 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:12:28,884 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 19:12:29,191 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 263 proven. 0 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2023-12-02 19:12:29,191 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 19:12:29,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715675672] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:12:29,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 19:12:29,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [8] total 20 [2023-12-02 19:12:29,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939194319] [2023-12-02 19:12:29,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:12:29,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-02 19:12:29,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:12:29,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-02 19:12:29,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2023-12-02 19:12:29,194 INFO L87 Difference]: Start difference. First operand 324 states and 445 transitions. Second operand has 14 states, 9 states have (on average 9.11111111111111) internal successors, (82), 11 states have internal predecessors, (82), 6 states have call successors, (49), 3 states have call predecessors, (49), 6 states have return successors, (48), 6 states have call predecessors, (48), 6 states have call successors, (48) [2023-12-02 19:12:33,648 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 19:12:35,740 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 19:12:37,782 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 19:12:39,860 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 19:12:41,880 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 19:12:43,998 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 19:12:46,035 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 19:12:48,196 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 19:12:50,211 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 19:12:52,216 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 19:12:54,220 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 19:12:56,325 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 19:12:58,350 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 19:13:00,366 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 19:13:02,396 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 19:13:04,877 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 19:13:07,395 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 19:13:10,057 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 19:13:12,138 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 19:13:14,164 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 19:13:16,243 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 19:13:18,361 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 19:13:20,446 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 19:13:22,512 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 19:13:23,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:13:23,267 INFO L93 Difference]: Finished difference Result 790 states and 1108 transitions. [2023-12-02 19:13:23,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-02 19:13:23,268 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 9 states have (on average 9.11111111111111) internal successors, (82), 11 states have internal predecessors, (82), 6 states have call successors, (49), 3 states have call predecessors, (49), 6 states have return successors, (48), 6 states have call predecessors, (48), 6 states have call successors, (48) Word has length 245 [2023-12-02 19:13:23,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:13:23,272 INFO L225 Difference]: With dead ends: 790 [2023-12-02 19:13:23,272 INFO L226 Difference]: Without dead ends: 567 [2023-12-02 19:13:23,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2023-12-02 19:13:23,274 INFO L413 NwaCegarLoop]: 463 mSDtfsCounter, 269 mSDsluCounter, 4031 mSDsCounter, 0 mSdLazyCounter, 2291 mSolverCounterSat, 60 mSolverCounterUnsat, 24 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 53.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 4494 SdHoareTripleChecker+Invalid, 2375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 2291 IncrementalHoareTripleChecker+Invalid, 24 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 53.8s IncrementalHoareTripleChecker+Time [2023-12-02 19:13:23,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [314 Valid, 4494 Invalid, 2375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 2291 Invalid, 24 Unknown, 0 Unchecked, 53.8s Time] [2023-12-02 19:13:23,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2023-12-02 19:13:23,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 559. [2023-12-02 19:13:23,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 304 states have (on average 1.194078947368421) internal successors, (363), 306 states have internal predecessors, (363), 184 states have call successors, (184), 69 states have call predecessors, (184), 70 states have return successors, (210), 183 states have call predecessors, (210), 182 states have call successors, (210) [2023-12-02 19:13:23,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 757 transitions. [2023-12-02 19:13:23,325 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 757 transitions. Word has length 245 [2023-12-02 19:13:23,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:13:23,325 INFO L495 AbstractCegarLoop]: Abstraction has 559 states and 757 transitions. [2023-12-02 19:13:23,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 9 states have (on average 9.11111111111111) internal successors, (82), 11 states have internal predecessors, (82), 6 states have call successors, (49), 3 states have call predecessors, (49), 6 states have return successors, (48), 6 states have call predecessors, (48), 6 states have call successors, (48) [2023-12-02 19:13:23,326 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 757 transitions. [2023-12-02 19:13:23,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2023-12-02 19:13:23,329 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:13:23,330 INFO L195 NwaCegarLoop]: trace histogram [17, 7, 7, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-12-02 19:13:23,339 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8929e1da-b58f-4cdc-9bd1-54b2d90366cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 19:13:23,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8929e1da-b58f-4cdc-9bd1-54b2d90366cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:13:23,530 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:13:23,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:13:23,531 INFO L85 PathProgramCache]: Analyzing trace with hash -2140611107, now seen corresponding path program 2 times [2023-12-02 19:13:23,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:13:23,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172094060] [2023-12-02 19:13:23,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:13:23,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:13:23,630 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 19:13:23,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1901661247] [2023-12-02 19:13:23,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 19:13:23,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:13:23,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8929e1da-b58f-4cdc-9bd1-54b2d90366cd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:13:23,632 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8929e1da-b58f-4cdc-9bd1-54b2d90366cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:13:23,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8929e1da-b58f-4cdc-9bd1-54b2d90366cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 19:13:24,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-12-02 19:13:24,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 19:13:24,253 INFO L262 TraceCheckSpWp]: Trace formula consists of 1799 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 19:13:24,263 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:13:24,289 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 497 trivial. 0 not checked. [2023-12-02 19:13:24,290 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 19:13:24,290 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:13:24,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172094060] [2023-12-02 19:13:24,290 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 19:13:24,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901661247] [2023-12-02 19:13:24,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901661247] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:13:24,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:13:24,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 19:13:24,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797259829] [2023-12-02 19:13:24,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:13:24,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 19:13:24,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:13:24,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 19:13:24,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 19:13:24,293 INFO L87 Difference]: Start difference. First operand 559 states and 757 transitions. Second operand has 5 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (37), 1 states have call predecessors, (37), 1 states have call successors, (37) [2023-12-02 19:13:24,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:13:24,684 INFO L93 Difference]: Finished difference Result 573 states and 772 transitions. [2023-12-02 19:13:24,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 19:13:24,685 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (37), 1 states have call predecessors, (37), 1 states have call successors, (37) Word has length 259 [2023-12-02 19:13:24,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:13:24,689 INFO L225 Difference]: With dead ends: 573 [2023-12-02 19:13:24,690 INFO L226 Difference]: Without dead ends: 571 [2023-12-02 19:13:24,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 255 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 19:13:24,691 INFO L413 NwaCegarLoop]: 305 mSDtfsCounter, 5 mSDsluCounter, 888 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 1193 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 19:13:24,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 1193 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 19:13:24,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2023-12-02 19:13:24,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 569. [2023-12-02 19:13:24,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 310 states have (on average 1.1903225806451614) internal successors, (369), 314 states have internal predecessors, (369), 186 states have call successors, (186), 71 states have call predecessors, (186), 72 states have return successors, (212), 183 states have call predecessors, (212), 184 states have call successors, (212) [2023-12-02 19:13:24,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 767 transitions. [2023-12-02 19:13:24,739 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 767 transitions. Word has length 259 [2023-12-02 19:13:24,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:13:24,740 INFO L495 AbstractCegarLoop]: Abstraction has 569 states and 767 transitions. [2023-12-02 19:13:24,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (37), 1 states have call predecessors, (37), 1 states have call successors, (37) [2023-12-02 19:13:24,740 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 767 transitions. [2023-12-02 19:13:24,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2023-12-02 19:13:24,744 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:13:24,744 INFO L195 NwaCegarLoop]: trace histogram [17, 7, 7, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-12-02 19:13:24,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8929e1da-b58f-4cdc-9bd1-54b2d90366cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-02 19:13:24,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8929e1da-b58f-4cdc-9bd1-54b2d90366cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-12-02 19:13:24,949 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:13:24,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:13:24,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1711086461, now seen corresponding path program 1 times [2023-12-02 19:13:24,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:13:24,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071333142] [2023-12-02 19:13:24,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:13:24,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:13:25,071 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 19:13:25,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1272309030] [2023-12-02 19:13:25,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:13:25,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:13:25,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8929e1da-b58f-4cdc-9bd1-54b2d90366cd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:13:25,073 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8929e1da-b58f-4cdc-9bd1-54b2d90366cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:13:25,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8929e1da-b58f-4cdc-9bd1-54b2d90366cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 19:13:25,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:13:25,803 INFO L262 TraceCheckSpWp]: Trace formula consists of 3481 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-02 19:13:25,814 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:13:25,850 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 168 proven. 0 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2023-12-02 19:13:25,850 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 19:13:25,850 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:13:25,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071333142] [2023-12-02 19:13:25,850 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 19:13:25,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272309030] [2023-12-02 19:13:25,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272309030] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:13:25,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:13:25,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 19:13:25,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123482197] [2023-12-02 19:13:25,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:13:25,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 19:13:25,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:13:25,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 19:13:25,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 19:13:25,853 INFO L87 Difference]: Start difference. First operand 569 states and 767 transitions. Second operand has 6 states, 3 states have (on average 22.333333333333332) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (38), 2 states have call predecessors, (38), 4 states have return successors, (37), 3 states have call predecessors, (37), 3 states have call successors, (37) [2023-12-02 19:13:26,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:13:26,319 INFO L93 Difference]: Finished difference Result 910 states and 1276 transitions. [2023-12-02 19:13:26,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 19:13:26,319 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 3 states have (on average 22.333333333333332) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (38), 2 states have call predecessors, (38), 4 states have return successors, (37), 3 states have call predecessors, (37), 3 states have call successors, (37) Word has length 263 [2023-12-02 19:13:26,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:13:26,325 INFO L225 Difference]: With dead ends: 910 [2023-12-02 19:13:26,325 INFO L226 Difference]: Without dead ends: 573 [2023-12-02 19:13:26,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 19:13:26,327 INFO L413 NwaCegarLoop]: 285 mSDtfsCounter, 0 mSDsluCounter, 1116 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1401 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 19:13:26,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1401 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 19:13:26,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2023-12-02 19:13:26,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 573. [2023-12-02 19:13:26,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 312 states have (on average 1.189102564102564) internal successors, (371), 318 states have internal predecessors, (371), 186 states have call successors, (186), 71 states have call predecessors, (186), 74 states have return successors, (237), 183 states have call predecessors, (237), 184 states have call successors, (237) [2023-12-02 19:13:26,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 794 transitions. [2023-12-02 19:13:26,375 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 794 transitions. Word has length 263 [2023-12-02 19:13:26,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:13:26,376 INFO L495 AbstractCegarLoop]: Abstraction has 573 states and 794 transitions. [2023-12-02 19:13:26,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 3 states have (on average 22.333333333333332) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (38), 2 states have call predecessors, (38), 4 states have return successors, (37), 3 states have call predecessors, (37), 3 states have call successors, (37) [2023-12-02 19:13:26,376 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 794 transitions. [2023-12-02 19:13:26,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2023-12-02 19:13:26,380 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:13:26,380 INFO L195 NwaCegarLoop]: trace histogram [17, 7, 7, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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 19:13:26,390 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8929e1da-b58f-4cdc-9bd1-54b2d90366cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 19:13:26,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8929e1da-b58f-4cdc-9bd1-54b2d90366cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:13:26,581 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:13:26,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:13:26,581 INFO L85 PathProgramCache]: Analyzing trace with hash 348278255, now seen corresponding path program 2 times [2023-12-02 19:13:26,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:13:26,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47924234] [2023-12-02 19:13:26,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:13:26,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:13:26,706 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 19:13:26,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1000744120] [2023-12-02 19:13:26,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 19:13:26,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:13:26,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8929e1da-b58f-4cdc-9bd1-54b2d90366cd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:13:26,707 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8929e1da-b58f-4cdc-9bd1-54b2d90366cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:13:26,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8929e1da-b58f-4cdc-9bd1-54b2d90366cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 19:13:27,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-12-02 19:13:27,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 19:13:27,332 INFO L262 TraceCheckSpWp]: Trace formula consists of 1810 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 19:13:27,338 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:13:27,362 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 520 trivial. 0 not checked. [2023-12-02 19:13:27,362 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 19:13:27,362 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:13:27,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47924234] [2023-12-02 19:13:27,362 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 19:13:27,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000744120] [2023-12-02 19:13:27,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000744120] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:13:27,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:13:27,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 19:13:27,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379746460] [2023-12-02 19:13:27,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:13:27,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 19:13:27,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:13:27,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 19:13:27,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 19:13:27,365 INFO L87 Difference]: Start difference. First operand 573 states and 794 transitions. Second operand has 5 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (37), 1 states have call predecessors, (37), 1 states have call successors, (37) [2023-12-02 19:13:27,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:13:27,769 INFO L93 Difference]: Finished difference Result 587 states and 809 transitions. [2023-12-02 19:13:27,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 19:13:27,769 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (37), 1 states have call predecessors, (37), 1 states have call successors, (37) Word has length 268 [2023-12-02 19:13:27,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:13:27,773 INFO L225 Difference]: With dead ends: 587 [2023-12-02 19:13:27,773 INFO L226 Difference]: Without dead ends: 585 [2023-12-02 19:13:27,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 264 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 19:13:27,774 INFO L413 NwaCegarLoop]: 305 mSDtfsCounter, 5 mSDsluCounter, 888 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 1193 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 19:13:27,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 1193 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 19:13:27,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2023-12-02 19:13:27,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 583. [2023-12-02 19:13:27,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 318 states have (on average 1.1855345911949686) internal successors, (377), 326 states have internal predecessors, (377), 188 states have call successors, (188), 73 states have call predecessors, (188), 76 states have return successors, (239), 183 states have call predecessors, (239), 186 states have call successors, (239) [2023-12-02 19:13:27,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 804 transitions. [2023-12-02 19:13:27,812 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 804 transitions. Word has length 268 [2023-12-02 19:13:27,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:13:27,813 INFO L495 AbstractCegarLoop]: Abstraction has 583 states and 804 transitions. [2023-12-02 19:13:27,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (37), 1 states have call predecessors, (37), 1 states have call successors, (37) [2023-12-02 19:13:27,813 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 804 transitions. [2023-12-02 19:13:27,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2023-12-02 19:13:27,816 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:13:27,816 INFO L195 NwaCegarLoop]: trace histogram [17, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2023-12-02 19:13:27,824 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8929e1da-b58f-4cdc-9bd1-54b2d90366cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-02 19:13:28,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8929e1da-b58f-4cdc-9bd1-54b2d90366cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:13:28,017 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:13:28,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:13:28,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1167264763, now seen corresponding path program 1 times [2023-12-02 19:13:28,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:13:28,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764988434] [2023-12-02 19:13:28,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:13:28,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:13:28,142 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 19:13:28,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1434360878] [2023-12-02 19:13:28,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:13:28,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:13:28,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8929e1da-b58f-4cdc-9bd1-54b2d90366cd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:13:28,143 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8929e1da-b58f-4cdc-9bd1-54b2d90366cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:13:28,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8929e1da-b58f-4cdc-9bd1-54b2d90366cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 19:13:28,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:13:28,968 INFO L262 TraceCheckSpWp]: Trace formula consists of 3440 conjuncts, 21 conjunts are in the unsatisfiable core [2023-12-02 19:13:28,974 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:13:29,006 INFO L134 CoverageAnalysis]: Checked inductivity of 548 backedges. 167 proven. 0 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2023-12-02 19:13:29,006 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 19:13:29,006 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:13:29,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764988434] [2023-12-02 19:13:29,006 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 19:13:29,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434360878] [2023-12-02 19:13:29,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434360878] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:13:29,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:13:29,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 19:13:29,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57317383] [2023-12-02 19:13:29,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:13:29,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 19:13:29,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:13:29,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 19:13:29,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 19:13:29,009 INFO L87 Difference]: Start difference. First operand 583 states and 804 transitions. Second operand has 6 states, 3 states have (on average 21.333333333333332) internal successors, (64), 5 states have internal predecessors, (64), 3 states have call successors, (39), 2 states have call predecessors, (39), 4 states have return successors, (38), 3 states have call predecessors, (38), 3 states have call successors, (38) [2023-12-02 19:13:29,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:13:29,595 INFO L93 Difference]: Finished difference Result 928 states and 1308 transitions. [2023-12-02 19:13:29,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 19:13:29,595 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 3 states have (on average 21.333333333333332) internal successors, (64), 5 states have internal predecessors, (64), 3 states have call successors, (39), 2 states have call predecessors, (39), 4 states have return successors, (38), 3 states have call predecessors, (38), 3 states have call successors, (38) Word has length 270 [2023-12-02 19:13:29,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:13:29,599 INFO L225 Difference]: With dead ends: 928 [2023-12-02 19:13:29,599 INFO L226 Difference]: Without dead ends: 583 [2023-12-02 19:13:29,601 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 19:13:29,601 INFO L413 NwaCegarLoop]: 285 mSDtfsCounter, 0 mSDsluCounter, 1116 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1401 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 19:13:29,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1401 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 19:13:29,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2023-12-02 19:13:29,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 583. [2023-12-02 19:13:29,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 318 states have (on average 1.1855345911949686) internal successors, (377), 326 states have internal predecessors, (377), 188 states have call successors, (188), 73 states have call predecessors, (188), 76 states have return successors, (237), 183 states have call predecessors, (237), 186 states have call successors, (237) [2023-12-02 19:13:29,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 802 transitions. [2023-12-02 19:13:29,645 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 802 transitions. Word has length 270 [2023-12-02 19:13:29,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:13:29,646 INFO L495 AbstractCegarLoop]: Abstraction has 583 states and 802 transitions. [2023-12-02 19:13:29,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 3 states have (on average 21.333333333333332) internal successors, (64), 5 states have internal predecessors, (64), 3 states have call successors, (39), 2 states have call predecessors, (39), 4 states have return successors, (38), 3 states have call predecessors, (38), 3 states have call successors, (38) [2023-12-02 19:13:29,646 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 802 transitions. [2023-12-02 19:13:29,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2023-12-02 19:13:29,649 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:13:29,650 INFO L195 NwaCegarLoop]: trace histogram [17, 8, 8, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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 19:13:29,663 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8929e1da-b58f-4cdc-9bd1-54b2d90366cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-02 19:13:29,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8929e1da-b58f-4cdc-9bd1-54b2d90366cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:13:29,850 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:13:29,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:13:29,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1952171014, now seen corresponding path program 1 times [2023-12-02 19:13:29,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:13:29,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015269734] [2023-12-02 19:13:29,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:13:29,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:13:30,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:13:30,688 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 22 proven. 8 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2023-12-02 19:13:30,688 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:13:30,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015269734] [2023-12-02 19:13:30,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015269734] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:13:30,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055645559] [2023-12-02 19:13:30,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:13:30,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:13:30,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8929e1da-b58f-4cdc-9bd1-54b2d90366cd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:13:30,690 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8929e1da-b58f-4cdc-9bd1-54b2d90366cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:13:30,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8929e1da-b58f-4cdc-9bd1-54b2d90366cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 19:13:31,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:13:31,360 INFO L262 TraceCheckSpWp]: Trace formula consists of 3494 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 19:13:31,367 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:13:31,395 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 297 proven. 0 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2023-12-02 19:13:31,395 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 19:13:31,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055645559] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:13:31,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 19:13:31,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 7 [2023-12-02 19:13:31,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385714281] [2023-12-02 19:13:31,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:13:31,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 19:13:31,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:13:31,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 19:13:31,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 19:13:31,399 INFO L87 Difference]: Start difference. First operand 583 states and 802 transitions. Second operand has 7 states, 5 states have (on average 18.2) internal successors, (91), 6 states have internal predecessors, (91), 2 states have call successors, (49), 2 states have call predecessors, (49), 4 states have return successors, (51), 4 states have call predecessors, (51), 2 states have call successors, (51) [2023-12-02 19:13:31,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:13:31,896 INFO L93 Difference]: Finished difference Result 1106 states and 1542 transitions. [2023-12-02 19:13:31,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 19:13:31,896 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 18.2) internal successors, (91), 6 states have internal predecessors, (91), 2 states have call successors, (49), 2 states have call predecessors, (49), 4 states have return successors, (51), 4 states have call predecessors, (51), 2 states have call successors, (51) Word has length 284 [2023-12-02 19:13:31,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:13:31,901 INFO L225 Difference]: With dead ends: 1106 [2023-12-02 19:13:31,901 INFO L226 Difference]: Without dead ends: 550 [2023-12-02 19:13:31,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 285 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-12-02 19:13:31,905 INFO L413 NwaCegarLoop]: 304 mSDtfsCounter, 1 mSDsluCounter, 1513 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 1817 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 19:13:31,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 1817 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 19:13:31,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2023-12-02 19:13:31,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 550. [2023-12-02 19:13:31,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 300 states have (on average 1.1733333333333333) internal successors, (352), 308 states have internal predecessors, (352), 179 states have call successors, (179), 67 states have call predecessors, (179), 70 states have return successors, (225), 174 states have call predecessors, (225), 177 states have call successors, (225) [2023-12-02 19:13:31,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 756 transitions. [2023-12-02 19:13:31,954 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 756 transitions. Word has length 284 [2023-12-02 19:13:31,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:13:31,954 INFO L495 AbstractCegarLoop]: Abstraction has 550 states and 756 transitions. [2023-12-02 19:13:31,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 18.2) internal successors, (91), 6 states have internal predecessors, (91), 2 states have call successors, (49), 2 states have call predecessors, (49), 4 states have return successors, (51), 4 states have call predecessors, (51), 2 states have call successors, (51) [2023-12-02 19:13:31,955 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 756 transitions. [2023-12-02 19:13:31,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2023-12-02 19:13:31,958 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:13:31,958 INFO L195 NwaCegarLoop]: trace histogram [17, 8, 8, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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, 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] [2023-12-02 19:13:31,971 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8929e1da-b58f-4cdc-9bd1-54b2d90366cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-12-02 19:13:32,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8929e1da-b58f-4cdc-9bd1-54b2d90366cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:13:32,159 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:13:32,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:13:32,159 INFO L85 PathProgramCache]: Analyzing trace with hash 2056757382, now seen corresponding path program 2 times [2023-12-02 19:13:32,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:13:32,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780055614] [2023-12-02 19:13:32,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:13:32,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:13:32,254 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 19:13:32,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [515423047] [2023-12-02 19:13:32,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 19:13:32,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:13:32,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8929e1da-b58f-4cdc-9bd1-54b2d90366cd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:13:32,255 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8929e1da-b58f-4cdc-9bd1-54b2d90366cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:13:32,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8929e1da-b58f-4cdc-9bd1-54b2d90366cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-02 19:13:32,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-12-02 19:13:32,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 19:13:32,839 INFO L262 TraceCheckSpWp]: Trace formula consists of 1798 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-02 19:13:32,845 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:13:32,887 INFO L134 CoverageAnalysis]: Checked inductivity of 582 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 568 trivial. 0 not checked. [2023-12-02 19:13:32,887 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 19:13:32,887 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:13:32,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780055614] [2023-12-02 19:13:32,887 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 19:13:32,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515423047] [2023-12-02 19:13:32,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515423047] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:13:32,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:13:32,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 19:13:32,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773006586] [2023-12-02 19:13:32,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:13:32,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 19:13:32,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:13:32,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 19:13:32,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-12-02 19:13:32,890 INFO L87 Difference]: Start difference. First operand 550 states and 756 transitions. Second operand has 8 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 2 states have call successors, (39), 2 states have call predecessors, (39), 2 states have return successors, (38), 2 states have call predecessors, (38), 1 states have call successors, (38) [2023-12-02 19:13:33,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:13:33,398 INFO L93 Difference]: Finished difference Result 568 states and 775 transitions. [2023-12-02 19:13:33,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 19:13:33,399 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 2 states have call successors, (39), 2 states have call predecessors, (39), 2 states have return successors, (38), 2 states have call predecessors, (38), 1 states have call successors, (38) Word has length 280 [2023-12-02 19:13:33,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:13:33,403 INFO L225 Difference]: With dead ends: 568 [2023-12-02 19:13:33,403 INFO L226 Difference]: Without dead ends: 566 [2023-12-02 19:13:33,403 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 273 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-12-02 19:13:33,404 INFO L413 NwaCegarLoop]: 306 mSDtfsCounter, 6 mSDsluCounter, 1801 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 2107 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 19:13:33,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 2107 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 19:13:33,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2023-12-02 19:13:33,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 552. [2023-12-02 19:13:33,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 302 states have (on average 1.1721854304635762) internal successors, (354), 308 states have internal predecessors, (354), 179 states have call successors, (179), 67 states have call predecessors, (179), 70 states have return successors, (225), 176 states have call predecessors, (225), 177 states have call successors, (225) [2023-12-02 19:13:33,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 758 transitions. [2023-12-02 19:13:33,434 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 758 transitions. Word has length 280 [2023-12-02 19:13:33,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:13:33,435 INFO L495 AbstractCegarLoop]: Abstraction has 552 states and 758 transitions. [2023-12-02 19:13:33,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 2 states have call successors, (39), 2 states have call predecessors, (39), 2 states have return successors, (38), 2 states have call predecessors, (38), 1 states have call successors, (38) [2023-12-02 19:13:33,435 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 758 transitions. [2023-12-02 19:13:33,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2023-12-02 19:13:33,437 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:13:33,437 INFO L195 NwaCegarLoop]: trace histogram [17, 8, 8, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-12-02 19:13:33,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8929e1da-b58f-4cdc-9bd1-54b2d90366cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-02 19:13:33,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8929e1da-b58f-4cdc-9bd1-54b2d90366cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:13:33,638 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:13:33,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:13:33,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1805455407, now seen corresponding path program 3 times [2023-12-02 19:13:33,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:13:33,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558415136] [2023-12-02 19:13:33,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:13:33,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:13:33,750 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 19:13:33,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [143281913] [2023-12-02 19:13:33,751 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 19:13:33,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:13:33,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8929e1da-b58f-4cdc-9bd1-54b2d90366cd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:13:33,752 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8929e1da-b58f-4cdc-9bd1-54b2d90366cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:13:33,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8929e1da-b58f-4cdc-9bd1-54b2d90366cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-02 19:13:34,314 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 19:13:34,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 19:13:34,321 INFO L262 TraceCheckSpWp]: Trace formula consists of 1211 conjuncts, 40 conjunts are in the unsatisfiable core [2023-12-02 19:13:34,330 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:13:36,545 WARN L876 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_hash_table_is_valid_#in~map.base_BEFORE_CALL_3| Int)) (and (exists ((|v_aws_hash_table_is_valid_#in~map.offset_BEFORE_CALL_3| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_hash_table_is_valid_#in~map.base_BEFORE_CALL_3|) |v_aws_hash_table_is_valid_#in~map.offset_BEFORE_CALL_3|) 0))) (not (= |v_aws_hash_table_is_valid_#in~map.base_BEFORE_CALL_3| 0)))) (exists ((|v_aws_hash_table_is_valid_#in~map.offset_BEFORE_CALL_3| Int)) (and (exists ((|v_aws_hash_table_is_valid_#in~map.base_BEFORE_CALL_3| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_hash_table_is_valid_#in~map.base_BEFORE_CALL_3|) |v_aws_hash_table_is_valid_#in~map.offset_BEFORE_CALL_3|) 0))) (not (= |v_aws_hash_table_is_valid_#in~map.offset_BEFORE_CALL_3| 0)))) (exists ((|v_aws_hash_table_is_valid_#in~map.base_BEFORE_CALL_3| Int)) (and (exists ((|v_aws_hash_table_is_valid_#in~map.offset_BEFORE_CALL_3| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_hash_table_is_valid_#in~map.base_BEFORE_CALL_3|) |v_aws_hash_table_is_valid_#in~map.offset_BEFORE_CALL_3|) 0))) (not (= |v_aws_hash_table_is_valid_#in~map.base_BEFORE_CALL_3| 0)))) (exists ((|v_aws_hash_table_is_valid_#in~map.offset_BEFORE_CALL_3| Int)) (and (exists ((|v_aws_hash_table_is_valid_#in~map.base_BEFORE_CALL_3| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_hash_table_is_valid_#in~map.base_BEFORE_CALL_3|) |v_aws_hash_table_is_valid_#in~map.offset_BEFORE_CALL_3|) 0))) (not (= |v_aws_hash_table_is_valid_#in~map.offset_BEFORE_CALL_3| 0))))) is different from true [2023-12-02 19:13:38,855 WARN L876 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_hash_table_eq_harness_~#map_a~0#1.base_BEFORE_CALL_2| Int)) (and (not (= |v_ULTIMATE.start_aws_hash_table_eq_harness_~#map_a~0#1.base_BEFORE_CALL_2| 0)) (exists ((|v_ULTIMATE.start_aws_hash_table_eq_harness_~#map_a~0#1.offset_BEFORE_CALL_3| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_hash_table_eq_harness_~#map_a~0#1.base_BEFORE_CALL_2|) |v_ULTIMATE.start_aws_hash_table_eq_harness_~#map_a~0#1.offset_BEFORE_CALL_3|) 0))))) (exists ((|v_ULTIMATE.start_aws_hash_table_eq_harness_~#map_a~0#1.offset_BEFORE_CALL_3| Int)) (and (exists ((|v_ULTIMATE.start_aws_hash_table_eq_harness_~#map_a~0#1.base_BEFORE_CALL_2| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_hash_table_eq_harness_~#map_a~0#1.base_BEFORE_CALL_2|) |v_ULTIMATE.start_aws_hash_table_eq_harness_~#map_a~0#1.offset_BEFORE_CALL_3|) 0))) (not (= |v_ULTIMATE.start_aws_hash_table_eq_harness_~#map_a~0#1.offset_BEFORE_CALL_3| 0)))) (exists ((|v_ULTIMATE.start_aws_hash_table_eq_harness_~#map_a~0#1.base_BEFORE_CALL_2| Int)) (and (not (= |v_ULTIMATE.start_aws_hash_table_eq_harness_~#map_a~0#1.base_BEFORE_CALL_2| 0)) (exists ((|v_ULTIMATE.start_aws_hash_table_eq_harness_~#map_a~0#1.offset_BEFORE_CALL_3| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_hash_table_eq_harness_~#map_a~0#1.base_BEFORE_CALL_2|) |v_ULTIMATE.start_aws_hash_table_eq_harness_~#map_a~0#1.offset_BEFORE_CALL_3|) 0))))) (exists ((|v_ULTIMATE.start_aws_hash_table_eq_harness_~#map_a~0#1.offset_BEFORE_CALL_3| Int)) (and (not (= |v_ULTIMATE.start_aws_hash_table_eq_harness_~#map_a~0#1.offset_BEFORE_CALL_3| 0)) (exists ((|v_ULTIMATE.start_aws_hash_table_eq_harness_~#map_a~0#1.base_BEFORE_CALL_2| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_hash_table_eq_harness_~#map_a~0#1.base_BEFORE_CALL_2|) |v_ULTIMATE.start_aws_hash_table_eq_harness_~#map_a~0#1.offset_BEFORE_CALL_3|) 0)))))) is different from true [2023-12-02 19:13:40,982 WARN L876 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_hash_table_eq_harness_~#map_a~0#1.offset_BEFORE_CALL_4| Int)) (and (not (= |v_ULTIMATE.start_aws_hash_table_eq_harness_~#map_a~0#1.offset_BEFORE_CALL_4| 0)) (exists ((|v_ULTIMATE.start_aws_hash_table_eq_harness_~#map_a~0#1.base_BEFORE_CALL_3| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_hash_table_eq_harness_~#map_a~0#1.base_BEFORE_CALL_3|) |v_ULTIMATE.start_aws_hash_table_eq_harness_~#map_a~0#1.offset_BEFORE_CALL_4|) 0))))) (exists ((|v_ULTIMATE.start_aws_hash_table_eq_harness_~#map_a~0#1.base_BEFORE_CALL_3| Int)) (and (not (= |v_ULTIMATE.start_aws_hash_table_eq_harness_~#map_a~0#1.base_BEFORE_CALL_3| 0)) (exists ((|v_ULTIMATE.start_aws_hash_table_eq_harness_~#map_a~0#1.offset_BEFORE_CALL_4| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_hash_table_eq_harness_~#map_a~0#1.base_BEFORE_CALL_3|) |v_ULTIMATE.start_aws_hash_table_eq_harness_~#map_a~0#1.offset_BEFORE_CALL_4|) 0))))) (exists ((|v_ULTIMATE.start_aws_hash_table_eq_harness_~#map_a~0#1.offset_BEFORE_CALL_4| Int)) (and (not (= |v_ULTIMATE.start_aws_hash_table_eq_harness_~#map_a~0#1.offset_BEFORE_CALL_4| 0)) (exists ((|v_ULTIMATE.start_aws_hash_table_eq_harness_~#map_a~0#1.base_BEFORE_CALL_3| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_hash_table_eq_harness_~#map_a~0#1.base_BEFORE_CALL_3|) |v_ULTIMATE.start_aws_hash_table_eq_harness_~#map_a~0#1.offset_BEFORE_CALL_4|) 0))))) (exists ((|v_ULTIMATE.start_aws_hash_table_eq_harness_~#map_a~0#1.base_BEFORE_CALL_3| Int)) (and (exists ((|v_ULTIMATE.start_aws_hash_table_eq_harness_~#map_a~0#1.offset_BEFORE_CALL_4| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_hash_table_eq_harness_~#map_a~0#1.base_BEFORE_CALL_3|) |v_ULTIMATE.start_aws_hash_table_eq_harness_~#map_a~0#1.offset_BEFORE_CALL_4|) 0))) (not (= |v_ULTIMATE.start_aws_hash_table_eq_harness_~#map_a~0#1.base_BEFORE_CALL_3| 0))))) is different from true [2023-12-02 19:13:43,328 WARN L876 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_hash_table_eq_harness_~#map_a~0#1.offset_BEFORE_CALL_5| Int)) (and (exists ((|v_ULTIMATE.start_aws_hash_table_eq_harness_~#map_a~0#1.base_BEFORE_CALL_4| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_hash_table_eq_harness_~#map_a~0#1.base_BEFORE_CALL_4|) |v_ULTIMATE.start_aws_hash_table_eq_harness_~#map_a~0#1.offset_BEFORE_CALL_5|) 0))) (not (= |v_ULTIMATE.start_aws_hash_table_eq_harness_~#map_a~0#1.offset_BEFORE_CALL_5| 0)))) (exists ((|v_ULTIMATE.start_aws_hash_table_eq_harness_~#map_a~0#1.offset_BEFORE_CALL_5| Int)) (and (exists ((|v_ULTIMATE.start_aws_hash_table_eq_harness_~#map_a~0#1.base_BEFORE_CALL_4| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_hash_table_eq_harness_~#map_a~0#1.base_BEFORE_CALL_4|) |v_ULTIMATE.start_aws_hash_table_eq_harness_~#map_a~0#1.offset_BEFORE_CALL_5|) 0))) (not (= |v_ULTIMATE.start_aws_hash_table_eq_harness_~#map_a~0#1.offset_BEFORE_CALL_5| 0)))) (exists ((|v_ULTIMATE.start_aws_hash_table_eq_harness_~#map_a~0#1.base_BEFORE_CALL_4| Int)) (and (exists ((|v_ULTIMATE.start_aws_hash_table_eq_harness_~#map_a~0#1.offset_BEFORE_CALL_5| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_hash_table_eq_harness_~#map_a~0#1.base_BEFORE_CALL_4|) |v_ULTIMATE.start_aws_hash_table_eq_harness_~#map_a~0#1.offset_BEFORE_CALL_5|) 0))) (not (= |v_ULTIMATE.start_aws_hash_table_eq_harness_~#map_a~0#1.base_BEFORE_CALL_4| 0)))) (exists ((|v_ULTIMATE.start_aws_hash_table_eq_harness_~#map_a~0#1.base_BEFORE_CALL_4| Int)) (and (exists ((|v_ULTIMATE.start_aws_hash_table_eq_harness_~#map_a~0#1.offset_BEFORE_CALL_5| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_hash_table_eq_harness_~#map_a~0#1.base_BEFORE_CALL_4|) |v_ULTIMATE.start_aws_hash_table_eq_harness_~#map_a~0#1.offset_BEFORE_CALL_5|) 0))) (not (= |v_ULTIMATE.start_aws_hash_table_eq_harness_~#map_a~0#1.base_BEFORE_CALL_4| 0))))) is different from true [2023-12-02 19:13:45,430 WARN L876 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_hash_table_eq_~a#1.base_BEFORE_CALL_1| Int)) (and (not (= |v_ULTIMATE.start_aws_hash_table_eq_~a#1.base_BEFORE_CALL_1| 0)) (exists ((|v_ULTIMATE.start_aws_hash_table_eq_~a#1.offset_BEFORE_CALL_1| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_hash_table_eq_~a#1.base_BEFORE_CALL_1|) |v_ULTIMATE.start_aws_hash_table_eq_~a#1.offset_BEFORE_CALL_1|) 0))))) (exists ((|v_ULTIMATE.start_aws_hash_table_eq_~a#1.base_BEFORE_CALL_1| Int)) (and (exists ((|v_ULTIMATE.start_aws_hash_table_eq_~a#1.offset_BEFORE_CALL_1| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_hash_table_eq_~a#1.base_BEFORE_CALL_1|) |v_ULTIMATE.start_aws_hash_table_eq_~a#1.offset_BEFORE_CALL_1|) 0))) (not (= |v_ULTIMATE.start_aws_hash_table_eq_~a#1.base_BEFORE_CALL_1| 0)))) (exists ((|v_ULTIMATE.start_aws_hash_table_eq_~a#1.offset_BEFORE_CALL_1| Int)) (and (exists ((|v_ULTIMATE.start_aws_hash_table_eq_~a#1.base_BEFORE_CALL_1| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_hash_table_eq_~a#1.base_BEFORE_CALL_1|) |v_ULTIMATE.start_aws_hash_table_eq_~a#1.offset_BEFORE_CALL_1|) 0))) (not (= |v_ULTIMATE.start_aws_hash_table_eq_~a#1.offset_BEFORE_CALL_1| 0)))) (exists ((|v_ULTIMATE.start_aws_hash_table_eq_~a#1.offset_BEFORE_CALL_1| Int)) (and (not (= |v_ULTIMATE.start_aws_hash_table_eq_~a#1.offset_BEFORE_CALL_1| 0)) (exists ((|v_ULTIMATE.start_aws_hash_table_eq_~a#1.base_BEFORE_CALL_1| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_hash_table_eq_~a#1.base_BEFORE_CALL_1|) |v_ULTIMATE.start_aws_hash_table_eq_~a#1.offset_BEFORE_CALL_1|) 0)))))) is different from true [2023-12-02 19:13:47,559 WARN L876 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_hash_table_eq_~a#1.offset_BEFORE_CALL_2| Int)) (and (not (= |v_ULTIMATE.start_aws_hash_table_eq_~a#1.offset_BEFORE_CALL_2| 0)) (exists ((|v_ULTIMATE.start_aws_hash_table_eq_~a#1.base_BEFORE_CALL_2| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_hash_table_eq_~a#1.base_BEFORE_CALL_2|) |v_ULTIMATE.start_aws_hash_table_eq_~a#1.offset_BEFORE_CALL_2|) 0))))) (exists ((|v_ULTIMATE.start_aws_hash_table_eq_~a#1.offset_BEFORE_CALL_2| Int)) (and (not (= |v_ULTIMATE.start_aws_hash_table_eq_~a#1.offset_BEFORE_CALL_2| 0)) (exists ((|v_ULTIMATE.start_aws_hash_table_eq_~a#1.base_BEFORE_CALL_2| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_hash_table_eq_~a#1.base_BEFORE_CALL_2|) |v_ULTIMATE.start_aws_hash_table_eq_~a#1.offset_BEFORE_CALL_2|) 0))))) (exists ((|v_ULTIMATE.start_aws_hash_table_eq_~a#1.base_BEFORE_CALL_2| Int)) (and (exists ((|v_ULTIMATE.start_aws_hash_table_eq_~a#1.offset_BEFORE_CALL_2| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_hash_table_eq_~a#1.base_BEFORE_CALL_2|) |v_ULTIMATE.start_aws_hash_table_eq_~a#1.offset_BEFORE_CALL_2|) 0))) (not (= |v_ULTIMATE.start_aws_hash_table_eq_~a#1.base_BEFORE_CALL_2| 0)))) (exists ((|v_ULTIMATE.start_aws_hash_table_eq_~a#1.base_BEFORE_CALL_2| Int)) (and (not (= |v_ULTIMATE.start_aws_hash_table_eq_~a#1.base_BEFORE_CALL_2| 0)) (exists ((|v_ULTIMATE.start_aws_hash_table_eq_~a#1.offset_BEFORE_CALL_2| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_hash_table_eq_~a#1.base_BEFORE_CALL_2|) |v_ULTIMATE.start_aws_hash_table_eq_~a#1.offset_BEFORE_CALL_2|) 0)))))) is different from true [2023-12-02 19:13:49,652 WARN L876 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_hash_table_eq_~a#1.offset_BEFORE_CALL_3| Int)) (and (exists ((|v_ULTIMATE.start_aws_hash_table_eq_~a#1.base_BEFORE_CALL_3| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_hash_table_eq_~a#1.base_BEFORE_CALL_3|) |v_ULTIMATE.start_aws_hash_table_eq_~a#1.offset_BEFORE_CALL_3|) 0))) (not (= |v_ULTIMATE.start_aws_hash_table_eq_~a#1.offset_BEFORE_CALL_3| 0)))) (exists ((|v_ULTIMATE.start_aws_hash_table_eq_~a#1.offset_BEFORE_CALL_3| Int)) (and (not (= |v_ULTIMATE.start_aws_hash_table_eq_~a#1.offset_BEFORE_CALL_3| 0)) (exists ((|v_ULTIMATE.start_aws_hash_table_eq_~a#1.base_BEFORE_CALL_3| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_hash_table_eq_~a#1.base_BEFORE_CALL_3|) |v_ULTIMATE.start_aws_hash_table_eq_~a#1.offset_BEFORE_CALL_3|) 0))))) (exists ((|v_ULTIMATE.start_aws_hash_table_eq_~a#1.base_BEFORE_CALL_3| Int)) (and (not (= |v_ULTIMATE.start_aws_hash_table_eq_~a#1.base_BEFORE_CALL_3| 0)) (exists ((|v_ULTIMATE.start_aws_hash_table_eq_~a#1.offset_BEFORE_CALL_3| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_hash_table_eq_~a#1.base_BEFORE_CALL_3|) |v_ULTIMATE.start_aws_hash_table_eq_~a#1.offset_BEFORE_CALL_3|) 0))))) (exists ((|v_ULTIMATE.start_aws_hash_table_eq_~a#1.base_BEFORE_CALL_3| Int)) (and (not (= |v_ULTIMATE.start_aws_hash_table_eq_~a#1.base_BEFORE_CALL_3| 0)) (exists ((|v_ULTIMATE.start_aws_hash_table_eq_~a#1.offset_BEFORE_CALL_3| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_hash_table_eq_~a#1.base_BEFORE_CALL_3|) |v_ULTIMATE.start_aws_hash_table_eq_~a#1.offset_BEFORE_CALL_3|) 0)))))) is different from true [2023-12-02 19:13:51,783 WARN L876 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_hash_table_eq_~a#1.offset_BEFORE_CALL_4| Int)) (and (exists ((|v_ULTIMATE.start_aws_hash_table_eq_~a#1.base_BEFORE_CALL_4| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_hash_table_eq_~a#1.base_BEFORE_CALL_4|) |v_ULTIMATE.start_aws_hash_table_eq_~a#1.offset_BEFORE_CALL_4|) 0))) (not (= |v_ULTIMATE.start_aws_hash_table_eq_~a#1.offset_BEFORE_CALL_4| 0)))) (exists ((|v_ULTIMATE.start_aws_hash_table_eq_~a#1.base_BEFORE_CALL_4| Int)) (and (not (= |v_ULTIMATE.start_aws_hash_table_eq_~a#1.base_BEFORE_CALL_4| 0)) (exists ((|v_ULTIMATE.start_aws_hash_table_eq_~a#1.offset_BEFORE_CALL_4| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_hash_table_eq_~a#1.base_BEFORE_CALL_4|) |v_ULTIMATE.start_aws_hash_table_eq_~a#1.offset_BEFORE_CALL_4|) 0))))) (exists ((|v_ULTIMATE.start_aws_hash_table_eq_~a#1.offset_BEFORE_CALL_4| Int)) (and (not (= |v_ULTIMATE.start_aws_hash_table_eq_~a#1.offset_BEFORE_CALL_4| 0)) (exists ((|v_ULTIMATE.start_aws_hash_table_eq_~a#1.base_BEFORE_CALL_4| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_hash_table_eq_~a#1.base_BEFORE_CALL_4|) |v_ULTIMATE.start_aws_hash_table_eq_~a#1.offset_BEFORE_CALL_4|) 0))))) (exists ((|v_ULTIMATE.start_aws_hash_table_eq_~a#1.base_BEFORE_CALL_4| Int)) (and (exists ((|v_ULTIMATE.start_aws_hash_table_eq_~a#1.offset_BEFORE_CALL_4| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_hash_table_eq_~a#1.base_BEFORE_CALL_4|) |v_ULTIMATE.start_aws_hash_table_eq_~a#1.offset_BEFORE_CALL_4|) 0))) (not (= |v_ULTIMATE.start_aws_hash_table_eq_~a#1.base_BEFORE_CALL_4| 0))))) is different from true [2023-12-02 19:13:53,891 WARN L876 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_hash_table_eq_~a#1.offset_BEFORE_CALL_5| Int)) (and (not (= |v_ULTIMATE.start_aws_hash_table_eq_~a#1.offset_BEFORE_CALL_5| 0)) (exists ((|v_ULTIMATE.start_aws_hash_table_eq_~a#1.base_BEFORE_CALL_5| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_hash_table_eq_~a#1.base_BEFORE_CALL_5|) |v_ULTIMATE.start_aws_hash_table_eq_~a#1.offset_BEFORE_CALL_5|) 0))))) (exists ((|v_ULTIMATE.start_aws_hash_table_eq_~a#1.offset_BEFORE_CALL_5| Int)) (and (not (= |v_ULTIMATE.start_aws_hash_table_eq_~a#1.offset_BEFORE_CALL_5| 0)) (exists ((|v_ULTIMATE.start_aws_hash_table_eq_~a#1.base_BEFORE_CALL_5| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_hash_table_eq_~a#1.base_BEFORE_CALL_5|) |v_ULTIMATE.start_aws_hash_table_eq_~a#1.offset_BEFORE_CALL_5|) 0))))) (exists ((|v_ULTIMATE.start_aws_hash_table_eq_~a#1.base_BEFORE_CALL_5| Int)) (and (exists ((|v_ULTIMATE.start_aws_hash_table_eq_~a#1.offset_BEFORE_CALL_5| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_hash_table_eq_~a#1.base_BEFORE_CALL_5|) |v_ULTIMATE.start_aws_hash_table_eq_~a#1.offset_BEFORE_CALL_5|) 0))) (not (= |v_ULTIMATE.start_aws_hash_table_eq_~a#1.base_BEFORE_CALL_5| 0)))) (exists ((|v_ULTIMATE.start_aws_hash_table_eq_~a#1.base_BEFORE_CALL_5| Int)) (and (exists ((|v_ULTIMATE.start_aws_hash_table_eq_~a#1.offset_BEFORE_CALL_5| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_hash_table_eq_~a#1.base_BEFORE_CALL_5|) |v_ULTIMATE.start_aws_hash_table_eq_~a#1.offset_BEFORE_CALL_5|) 0))) (not (= |v_ULTIMATE.start_aws_hash_table_eq_~a#1.base_BEFORE_CALL_5| 0))))) is different from true [2023-12-02 19:13:55,983 WARN L876 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_hash_table_eq_~a#1.base_BEFORE_CALL_6| Int)) (and (not (= |v_ULTIMATE.start_aws_hash_table_eq_~a#1.base_BEFORE_CALL_6| 0)) (exists ((|v_ULTIMATE.start_aws_hash_table_eq_~a#1.offset_BEFORE_CALL_6| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_hash_table_eq_~a#1.base_BEFORE_CALL_6|) |v_ULTIMATE.start_aws_hash_table_eq_~a#1.offset_BEFORE_CALL_6|) 0))))) (exists ((|v_ULTIMATE.start_aws_hash_table_eq_~a#1.base_BEFORE_CALL_6| Int)) (and (exists ((|v_ULTIMATE.start_aws_hash_table_eq_~a#1.offset_BEFORE_CALL_6| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_hash_table_eq_~a#1.base_BEFORE_CALL_6|) |v_ULTIMATE.start_aws_hash_table_eq_~a#1.offset_BEFORE_CALL_6|) 0))) (not (= |v_ULTIMATE.start_aws_hash_table_eq_~a#1.base_BEFORE_CALL_6| 0)))) (exists ((|v_ULTIMATE.start_aws_hash_table_eq_~a#1.offset_BEFORE_CALL_6| Int)) (and (not (= |v_ULTIMATE.start_aws_hash_table_eq_~a#1.offset_BEFORE_CALL_6| 0)) (exists ((|v_ULTIMATE.start_aws_hash_table_eq_~a#1.base_BEFORE_CALL_6| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_hash_table_eq_~a#1.base_BEFORE_CALL_6|) |v_ULTIMATE.start_aws_hash_table_eq_~a#1.offset_BEFORE_CALL_6|) 0))))) (exists ((|v_ULTIMATE.start_aws_hash_table_eq_~a#1.offset_BEFORE_CALL_6| Int)) (and (not (= |v_ULTIMATE.start_aws_hash_table_eq_~a#1.offset_BEFORE_CALL_6| 0)) (exists ((|v_ULTIMATE.start_aws_hash_table_eq_~a#1.base_BEFORE_CALL_6| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_hash_table_eq_~a#1.base_BEFORE_CALL_6|) |v_ULTIMATE.start_aws_hash_table_eq_~a#1.offset_BEFORE_CALL_6|) 0)))))) is different from true [2023-12-02 19:13:58,077 WARN L876 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_hash_table_eq_~a#1.offset_BEFORE_CALL_7| Int)) (and (not (= |v_ULTIMATE.start_aws_hash_table_eq_~a#1.offset_BEFORE_CALL_7| 0)) (exists ((|v_ULTIMATE.start_aws_hash_table_eq_~a#1.base_BEFORE_CALL_7| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_hash_table_eq_~a#1.base_BEFORE_CALL_7|) |v_ULTIMATE.start_aws_hash_table_eq_~a#1.offset_BEFORE_CALL_7|) 0))))) (exists ((|v_ULTIMATE.start_aws_hash_table_eq_~a#1.base_BEFORE_CALL_7| Int)) (and (exists ((|v_ULTIMATE.start_aws_hash_table_eq_~a#1.offset_BEFORE_CALL_7| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_hash_table_eq_~a#1.base_BEFORE_CALL_7|) |v_ULTIMATE.start_aws_hash_table_eq_~a#1.offset_BEFORE_CALL_7|) 0))) (not (= |v_ULTIMATE.start_aws_hash_table_eq_~a#1.base_BEFORE_CALL_7| 0)))) (exists ((|v_ULTIMATE.start_aws_hash_table_eq_~a#1.base_BEFORE_CALL_7| Int)) (and (exists ((|v_ULTIMATE.start_aws_hash_table_eq_~a#1.offset_BEFORE_CALL_7| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_hash_table_eq_~a#1.base_BEFORE_CALL_7|) |v_ULTIMATE.start_aws_hash_table_eq_~a#1.offset_BEFORE_CALL_7|) 0))) (not (= |v_ULTIMATE.start_aws_hash_table_eq_~a#1.base_BEFORE_CALL_7| 0)))) (exists ((|v_ULTIMATE.start_aws_hash_table_eq_~a#1.offset_BEFORE_CALL_7| Int)) (and (exists ((|v_ULTIMATE.start_aws_hash_table_eq_~a#1.base_BEFORE_CALL_7| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_hash_table_eq_~a#1.base_BEFORE_CALL_7|) |v_ULTIMATE.start_aws_hash_table_eq_~a#1.offset_BEFORE_CALL_7|) 0))) (not (= |v_ULTIMATE.start_aws_hash_table_eq_~a#1.offset_BEFORE_CALL_7| 0))))) is different from true [2023-12-02 19:14:00,199 WARN L876 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_hash_table_eq_~a#1.offset_BEFORE_CALL_8| Int)) (and (not (= |v_ULTIMATE.start_aws_hash_table_eq_~a#1.offset_BEFORE_CALL_8| 0)) (exists ((|v_ULTIMATE.start_aws_hash_table_eq_~a#1.base_BEFORE_CALL_8| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_hash_table_eq_~a#1.base_BEFORE_CALL_8|) |v_ULTIMATE.start_aws_hash_table_eq_~a#1.offset_BEFORE_CALL_8|) 0))))) (exists ((|v_ULTIMATE.start_aws_hash_table_eq_~a#1.base_BEFORE_CALL_8| Int)) (and (not (= |v_ULTIMATE.start_aws_hash_table_eq_~a#1.base_BEFORE_CALL_8| 0)) (exists ((|v_ULTIMATE.start_aws_hash_table_eq_~a#1.offset_BEFORE_CALL_8| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_hash_table_eq_~a#1.base_BEFORE_CALL_8|) |v_ULTIMATE.start_aws_hash_table_eq_~a#1.offset_BEFORE_CALL_8|) 0))))) (exists ((|v_ULTIMATE.start_aws_hash_table_eq_~a#1.base_BEFORE_CALL_8| Int)) (and (not (= |v_ULTIMATE.start_aws_hash_table_eq_~a#1.base_BEFORE_CALL_8| 0)) (exists ((|v_ULTIMATE.start_aws_hash_table_eq_~a#1.offset_BEFORE_CALL_8| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_hash_table_eq_~a#1.base_BEFORE_CALL_8|) |v_ULTIMATE.start_aws_hash_table_eq_~a#1.offset_BEFORE_CALL_8|) 0))))) (exists ((|v_ULTIMATE.start_aws_hash_table_eq_~a#1.offset_BEFORE_CALL_8| Int)) (and (exists ((|v_ULTIMATE.start_aws_hash_table_eq_~a#1.base_BEFORE_CALL_8| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_hash_table_eq_~a#1.base_BEFORE_CALL_8|) |v_ULTIMATE.start_aws_hash_table_eq_~a#1.offset_BEFORE_CALL_8|) 0))) (not (= |v_ULTIMATE.start_aws_hash_table_eq_~a#1.offset_BEFORE_CALL_8| 0))))) is different from true [2023-12-02 19:14:02,509 INFO L134 CoverageAnalysis]: Checked inductivity of 626 backedges. 283 proven. 2 refuted. 0 times theorem prover too weak. 276 trivial. 65 not checked. [2023-12-02 19:14:02,509 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:14:05,499 INFO L134 CoverageAnalysis]: Checked inductivity of 626 backedges. 25 proven. 22 refuted. 0 times theorem prover too weak. 579 trivial. 0 not checked. [2023-12-02 19:14:05,499 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:14:05,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558415136] [2023-12-02 19:14:05,500 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 19:14:05,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143281913] [2023-12-02 19:14:05,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143281913] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:14:05,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1412675559] [2023-12-02 19:14:05,527 INFO L159 IcfgInterpreter]: Started Sifa with 110 locations of interest [2023-12-02 19:14:05,527 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:14:05,532 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:14:05,537 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:14:05,538 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:15:16,876 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-12-02 19:15:16,965 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-12-02 19:17:00,928 INFO L197 IcfgInterpreter]: Interpreting procedure ensure_allocated_hash_table with input of size 2293 for LOIs [2023-12-02 19:18:46,019 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 59 for LOIs [2023-12-02 19:18:46,076 INFO L197 IcfgInterpreter]: Interpreting procedure aws_hash_table_get_entry_count with input of size 161 for LOIs [2023-12-02 19:18:46,357 INFO L197 IcfgInterpreter]: Interpreting procedure save_byte_from_hash_table with input of size 225 for LOIs [2023-12-02 19:18:47,635 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 2294 for LOIs [2023-12-02 19:19:04,301 INFO L197 IcfgInterpreter]: Interpreting procedure hash_table_state_required_bytes with input of size 40 for LOIs [2023-12-02 19:19:04,825 INFO L197 IcfgInterpreter]: Interpreting procedure aws_mul_size_checked with input of size 79 for LOIs [2023-12-02 19:19:05,535 INFO L197 IcfgInterpreter]: Interpreting procedure __CPROVER_overflow_mult with input of size 61 for LOIs [2023-12-02 19:19:05,549 INFO L197 IcfgInterpreter]: Interpreting procedure aws_raise_error with input of size 74 for LOIs [2023-12-02 19:19:05,563 INFO L197 IcfgInterpreter]: Interpreting procedure aws_add_size_checked with input of size 72 for LOIs [2023-12-02 19:19:05,782 INFO L197 IcfgInterpreter]: Interpreting procedure __CPROVER_overflow_plus with input of size 54 for LOIs [2023-12-02 19:19:05,793 INFO L197 IcfgInterpreter]: Interpreting procedure bounded_malloc with input of size 83 for LOIs [2023-12-02 19:19:06,175 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 36 for LOIs [2023-12-02 19:19:06,179 INFO L197 IcfgInterpreter]: Interpreting procedure aws_hash_table_is_valid with input of size 40 for LOIs [2023-12-02 19:19:08,484 INFO L197 IcfgInterpreter]: Interpreting procedure hash_table_state_is_valid with input of size 55 for LOIs [2023-12-02 19:19:09,419 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-12-02 19:19:09,538 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-12-02 19:19:13,663 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-12-02 19:19:14,969 INFO L197 IcfgInterpreter]: Interpreting procedure aws_is_power_of_two with input of size 36 for LOIs [2023-12-02 19:19:15,013 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:21:17,332 WARN L293 SmtUtils]: Spent 2.00m on a formula simplification. DAG size of input: 2137 DAG size of output: 2135 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)