./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_priority_queue_capacity_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe63ddc-b5a7-43d3-829f-dfeafb0f5b67/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe63ddc-b5a7-43d3-829f-dfeafb0f5b67/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe63ddc-b5a7-43d3-829f-dfeafb0f5b67/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe63ddc-b5a7-43d3-829f-dfeafb0f5b67/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_priority_queue_capacity_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe63ddc-b5a7-43d3-829f-dfeafb0f5b67/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe63ddc-b5a7-43d3-829f-dfeafb0f5b67/bin/uautomizer-verify-VRDe98Ueme --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 Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash b8e2b19500a9ff32f182f41fca1db48d6268985503aaacd0cb9efdaafa7d6419 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:59:33,597 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:59:33,711 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe63ddc-b5a7-43d3-829f-dfeafb0f5b67/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-64bit-Automizer_Default.epf [2023-11-26 11:59:33,717 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:59:33,718 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:59:33,741 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:59:33,742 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:59:33,743 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:59:33,743 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:59:33,744 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:59:33,745 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:59:33,745 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:59:33,746 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:59:33,746 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:59:33,747 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:59:33,748 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:59:33,748 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 11:59:33,749 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:59:33,749 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:59:33,749 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 11:59:33,750 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:59:33,750 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 11:59:33,751 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 11:59:33,751 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:59:33,752 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:59:33,752 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:59:33,753 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:59:33,753 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:59:33,753 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:59:33,754 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:59:33,754 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:59:33,755 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 11:59:33,755 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:59:33,756 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:59:33,756 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:59:33,756 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:59:33,757 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 11:59:33,757 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:59:33,758 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:59:33,758 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_ffe63ddc-b5a7-43d3-829f-dfeafb0f5b67/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe63ddc-b5a7-43d3-829f-dfeafb0f5b67/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b8e2b19500a9ff32f182f41fca1db48d6268985503aaacd0cb9efdaafa7d6419 [2023-11-26 11:59:34,076 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:59:34,134 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:59:34,136 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:59:34,139 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:59:34,139 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:59:34,141 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe63ddc-b5a7-43d3-829f-dfeafb0f5b67/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/aws-c-common/aws_priority_queue_capacity_harness.i [2023-11-26 11:59:37,244 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:59:37,797 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:59:37,798 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe63ddc-b5a7-43d3-829f-dfeafb0f5b67/sv-benchmarks/c/aws-c-common/aws_priority_queue_capacity_harness.i [2023-11-26 11:59:37,835 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe63ddc-b5a7-43d3-829f-dfeafb0f5b67/bin/uautomizer-verify-VRDe98Ueme/data/78c5e14ec/a85ffd82b99c49d2b103a4bb1a41fc00/FLAG11e8602bb [2023-11-26 11:59:37,849 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe63ddc-b5a7-43d3-829f-dfeafb0f5b67/bin/uautomizer-verify-VRDe98Ueme/data/78c5e14ec/a85ffd82b99c49d2b103a4bb1a41fc00 [2023-11-26 11:59:37,852 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:59:37,854 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:59:37,855 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:59:37,855 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:59:37,860 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:59:37,861 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:59:37" (1/1) ... [2023-11-26 11:59:37,862 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77f404b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:37, skipping insertion in model container [2023-11-26 11:59:37,863 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:59:37" (1/1) ... [2023-11-26 11:59:37,970 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:59:38,264 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_ffe63ddc-b5a7-43d3-829f-dfeafb0f5b67/sv-benchmarks/c/aws-c-common/aws_priority_queue_capacity_harness.i[4501,4514] [2023-11-26 11:59:38,273 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_ffe63ddc-b5a7-43d3-829f-dfeafb0f5b67/sv-benchmarks/c/aws-c-common/aws_priority_queue_capacity_harness.i[4561,4574] [2023-11-26 11:59:39,293 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 11:59:39,300 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 11:59:39,301 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 11:59:39,302 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 11:59:39,305 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 11:59:39,328 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 11:59:39,329 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 11:59:39,333 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 11:59:39,335 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 11:59:39,725 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-26 11:59:39,727 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-26 11:59:39,728 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-26 11:59:39,730 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-26 11:59:39,732 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-26 11:59:39,733 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-26 11:59:39,733 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-26 11:59:39,734 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-26 11:59:39,735 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-26 11:59:39,736 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-26 11:59:39,955 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 11:59:39,956 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 11:59:40,026 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:59:40,087 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:59:40,113 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_ffe63ddc-b5a7-43d3-829f-dfeafb0f5b67/sv-benchmarks/c/aws-c-common/aws_priority_queue_capacity_harness.i[4501,4514] [2023-11-26 11:59:40,114 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_ffe63ddc-b5a7-43d3-829f-dfeafb0f5b67/sv-benchmarks/c/aws-c-common/aws_priority_queue_capacity_harness.i[4561,4574] [2023-11-26 11:59:40,192 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 11:59:40,208 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 11:59:40,208 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 11:59:40,209 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 11:59:40,210 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 11:59:40,217 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 11:59:40,221 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 11:59:40,223 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 11:59:40,225 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 11:59:40,281 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-26 11:59:40,282 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-26 11:59:40,283 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-26 11:59:40,284 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-26 11:59:40,285 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-26 11:59:40,286 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-26 11:59:40,287 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-26 11:59:40,288 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-26 11:59:40,289 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-26 11:59:40,290 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-26 11:59:40,361 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 11:59:40,361 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 11:59:40,370 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : : "r"(pBuf) : "memory"); [7703-7714] [2023-11-26 11:59:40,410 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:59:40,715 WARN L675 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:59:40,716 WARN L675 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:59:40,716 WARN L675 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:59:40,717 WARN L675 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:59:40,717 WARN L675 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:59:40,717 WARN L675 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:59:40,717 WARN L675 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:59:40,717 WARN L675 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:59:40,718 WARN L675 CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:59:40,718 WARN L675 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:59:40,718 WARN L675 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:59:40,719 WARN L675 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:59:40,719 WARN L675 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:59:40,720 WARN L675 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:59:40,720 WARN L675 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:59:40,729 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:59:40,730 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:40 WrapperNode [2023-11-26 11:59:40,730 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:59:40,731 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:59:40,732 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:59:40,732 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:59:40,741 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:40" (1/1) ... [2023-11-26 11:59:40,852 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:40" (1/1) ... [2023-11-26 11:59:40,923 INFO L138 Inliner]: procedures = 688, calls = 1537, calls flagged for inlining = 55, calls inlined = 11, statements flattened = 691 [2023-11-26 11:59:40,924 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:59:40,925 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:59:40,925 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:59:40,925 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:59:40,946 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:40" (1/1) ... [2023-11-26 11:59:40,946 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:40" (1/1) ... [2023-11-26 11:59:40,957 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:40" (1/1) ... [2023-11-26 11:59:41,103 INFO L175 MemorySlicer]: Split 326 memory accesses to 7 slices as follows [2, 236, 6, 69, 3, 7, 3]. 72 percent of accesses are in the largest equivalence class. The 257 initializations are split as follows [2, 236, 0, 10, 1, 5, 3]. The 7 writes are split as follows [0, 0, 2, 4, 1, 0, 0]. [2023-11-26 11:59:41,105 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:40" (1/1) ... [2023-11-26 11:59:41,106 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:40" (1/1) ... [2023-11-26 11:59:41,168 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:40" (1/1) ... [2023-11-26 11:59:41,173 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:40" (1/1) ... [2023-11-26 11:59:41,196 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:40" (1/1) ... [2023-11-26 11:59:41,202 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:40" (1/1) ... [2023-11-26 11:59:41,226 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:59:41,232 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:59:41,232 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:59:41,232 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:59:41,233 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:40" (1/1) ... [2023-11-26 11:59:41,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:59:41,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe63ddc-b5a7-43d3-829f-dfeafb0f5b67/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:59:41,263 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe63ddc-b5a7-43d3-829f-dfeafb0f5b67/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:59:41,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe63ddc-b5a7-43d3-829f-dfeafb0f5b67/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:59:41,308 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2023-11-26 11:59:41,309 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2023-11-26 11:59:41,309 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 11:59:41,309 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_bounded [2023-11-26 11:59:41,309 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_bounded [2023-11-26 11:59:41,309 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_valid [2023-11-26 11:59:41,310 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_valid [2023-11-26 11:59:41,310 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2023-11-26 11:59:41,310 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2023-11-26 11:59:41,310 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 11:59:41,310 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 11:59:41,310 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 11:59:41,311 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-26 11:59:41,311 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-26 11:59:41,311 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2023-11-26 11:59:41,311 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2023-11-26 11:59:41,311 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2023-11-26 11:59:41,311 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2023-11-26 11:59:41,312 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-26 11:59:41,312 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-26 11:59:41,312 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-26 11:59:41,312 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:59:41,312 INFO L130 BoogieDeclarations]: Found specification of procedure save_byte_from_array [2023-11-26 11:59:41,312 INFO L138 BoogieDeclarations]: Found implementation of procedure save_byte_from_array [2023-11-26 11:59:41,313 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-26 11:59:41,313 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-26 11:59:41,313 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-26 11:59:41,313 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2023-11-26 11:59:41,313 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#4 [2023-11-26 11:59:41,313 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#5 [2023-11-26 11:59:41,314 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#6 [2023-11-26 11:59:41,314 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:59:41,314 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:59:41,314 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2023-11-26 11:59:41,314 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2023-11-26 11:59:41,314 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2023-11-26 11:59:41,315 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2023-11-26 11:59:41,315 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2023-11-26 11:59:41,315 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2023-11-26 11:59:41,315 INFO L130 BoogieDeclarations]: Found specification of procedure aws_priority_queue_is_valid [2023-11-26 11:59:41,315 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_priority_queue_is_valid [2023-11-26 11:59:41,315 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-26 11:59:41,316 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-26 11:59:41,316 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 11:59:41,316 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-26 11:59:41,316 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-26 11:59:41,316 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-26 11:59:41,316 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2023-11-26 11:59:41,316 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#4 [2023-11-26 11:59:41,317 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#5 [2023-11-26 11:59:41,317 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#6 [2023-11-26 11:59:41,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2023-11-26 11:59:41,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2023-11-26 11:59:41,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2023-11-26 11:59:41,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2023-11-26 11:59:41,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#4 [2023-11-26 11:59:41,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#5 [2023-11-26 11:59:41,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#6 [2023-11-26 11:59:41,318 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2023-11-26 11:59:41,318 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2023-11-26 11:59:41,318 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2023-11-26 11:59:41,319 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2023-11-26 11:59:41,319 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 11:59:41,319 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 11:59:41,319 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 11:59:41,319 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-26 11:59:41,319 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-26 11:59:41,319 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2023-11-26 11:59:41,320 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2023-11-26 11:59:41,320 INFO L130 BoogieDeclarations]: Found specification of procedure assert_array_list_equivalence [2023-11-26 11:59:41,320 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_array_list_equivalence [2023-11-26 11:59:41,320 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_array_list_has_allocated_data_member [2023-11-26 11:59:41,320 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_array_list_has_allocated_data_member [2023-11-26 11:59:41,320 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:59:41,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 11:59:41,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 11:59:41,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-26 11:59:41,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-26 11:59:41,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-11-26 11:59:41,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2023-11-26 11:59:41,703 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:59:41,707 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:59:42,695 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:59:42,843 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:59:42,844 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-26 11:59:42,845 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:59:42 BoogieIcfgContainer [2023-11-26 11:59:42,845 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:59:42,849 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:59:42,849 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:59:42,853 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:59:42,854 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:59:37" (1/3) ... [2023-11-26 11:59:42,857 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21794317 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:59:42, skipping insertion in model container [2023-11-26 11:59:42,857 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:40" (2/3) ... [2023-11-26 11:59:42,859 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21794317 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:59:42, skipping insertion in model container [2023-11-26 11:59:42,859 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:59:42" (3/3) ... [2023-11-26 11:59:42,862 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_priority_queue_capacity_harness.i [2023-11-26 11:59:42,882 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:59:42,883 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 11:59:42,950 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:59:42,963 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=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;@2101a870, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:59:42,969 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 11:59:42,974 INFO L276 IsEmpty]: Start isEmpty. Operand has 152 states, 94 states have (on average 1.2659574468085106) internal successors, (119), 95 states have internal predecessors, (119), 40 states have call successors, (40), 16 states have call predecessors, (40), 16 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-26 11:59:42,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-11-26 11:59:42,996 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:42,998 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:42,998 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:59:43,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:43,006 INFO L85 PathProgramCache]: Analyzing trace with hash -856232963, now seen corresponding path program 1 times [2023-11-26 11:59:43,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:43,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16313129] [2023-11-26 11:59:43,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:43,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:43,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:43,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:43,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16313129] [2023-11-26 11:59:43,692 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-26 11:59:43,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188232893] [2023-11-26 11:59:43,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:43,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:43,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe63ddc-b5a7-43d3-829f-dfeafb0f5b67/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:59:43,700 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe63ddc-b5a7-43d3-829f-dfeafb0f5b67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:59:43,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe63ddc-b5a7-43d3-829f-dfeafb0f5b67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:59:44,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:44,415 INFO L262 TraceCheckSpWp]: Trace formula consists of 2285 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-26 11:59:44,431 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:59:44,509 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2023-11-26 11:59:44,509 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:59:44,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188232893] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:59:44,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:59:44,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:59:44,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461555696] [2023-11-26 11:59:44,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:59:44,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 11:59:44,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:44,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 11:59:44,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 11:59:44,570 INFO L87 Difference]: Start difference. First operand has 152 states, 94 states have (on average 1.2659574468085106) internal successors, (119), 95 states have internal predecessors, (119), 40 states have call successors, (40), 16 states have call predecessors, (40), 16 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) Second operand has 2 states, 2 states have (on average 18.0) internal successors, (36), 2 states have internal predecessors, (36), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2023-11-26 11:59:44,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:44,784 INFO L93 Difference]: Finished difference Result 296 states and 416 transitions. [2023-11-26 11:59:44,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 11:59:44,787 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 18.0) internal successors, (36), 2 states have internal predecessors, (36), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 103 [2023-11-26 11:59:44,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:44,802 INFO L225 Difference]: With dead ends: 296 [2023-11-26 11:59:44,803 INFO L226 Difference]: Without dead ends: 150 [2023-11-26 11:59:44,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 11:59:44,825 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:44,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 182 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:59:44,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2023-11-26 11:59:44,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2023-11-26 11:59:44,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 93 states have (on average 1.2365591397849462) internal successors, (115), 94 states have internal predecessors, (115), 40 states have call successors, (40), 16 states have call predecessors, (40), 16 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2023-11-26 11:59:44,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 194 transitions. [2023-11-26 11:59:44,897 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 194 transitions. Word has length 103 [2023-11-26 11:59:44,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:44,899 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 194 transitions. [2023-11-26 11:59:44,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 18.0) internal successors, (36), 2 states have internal predecessors, (36), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2023-11-26 11:59:44,900 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 194 transitions. [2023-11-26 11:59:44,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-11-26 11:59:44,909 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:44,910 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:44,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe63ddc-b5a7-43d3-829f-dfeafb0f5b67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 11:59:45,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe63ddc-b5a7-43d3-829f-dfeafb0f5b67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-26 11:59:45,120 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:59:45,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:45,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1416546291, now seen corresponding path program 1 times [2023-11-26 11:59:45,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:45,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151885020] [2023-11-26 11:59:45,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:45,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:45,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:45,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:45,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151885020] [2023-11-26 11:59:45,350 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-26 11:59:45,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085497572] [2023-11-26 11:59:45,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:45,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:45,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe63ddc-b5a7-43d3-829f-dfeafb0f5b67/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:59:45,352 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe63ddc-b5a7-43d3-829f-dfeafb0f5b67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:59:45,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe63ddc-b5a7-43d3-829f-dfeafb0f5b67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 11:59:46,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:46,037 INFO L262 TraceCheckSpWp]: Trace formula consists of 2285 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 11:59:46,047 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:59:46,155 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-11-26 11:59:46,156 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:59:46,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085497572] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:59:46,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:59:46,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 11:59:46,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86870742] [2023-11-26 11:59:46,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:59:46,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:59:46,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:46,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:59:46,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:59:46,160 INFO L87 Difference]: Start difference. First operand 150 states and 194 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-11-26 11:59:46,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:46,479 INFO L93 Difference]: Finished difference Result 265 states and 344 transitions. [2023-11-26 11:59:46,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:59:46,480 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 103 [2023-11-26 11:59:46,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:46,488 INFO L225 Difference]: With dead ends: 265 [2023-11-26 11:59:46,488 INFO L226 Difference]: Without dead ends: 150 [2023-11-26 11:59:46,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:59:46,490 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 34 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:46,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 626 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 11:59:46,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2023-11-26 11:59:46,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2023-11-26 11:59:46,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 93 states have (on average 1.2258064516129032) internal successors, (114), 94 states have internal predecessors, (114), 40 states have call successors, (40), 16 states have call predecessors, (40), 16 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2023-11-26 11:59:46,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 193 transitions. [2023-11-26 11:59:46,527 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 193 transitions. Word has length 103 [2023-11-26 11:59:46,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:46,529 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 193 transitions. [2023-11-26 11:59:46,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-11-26 11:59:46,530 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 193 transitions. [2023-11-26 11:59:46,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-11-26 11:59:46,537 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:46,537 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:46,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe63ddc-b5a7-43d3-829f-dfeafb0f5b67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 11:59:46,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe63ddc-b5a7-43d3-829f-dfeafb0f5b67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-26 11:59:46,754 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:59:46,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:46,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1251965281, now seen corresponding path program 1 times [2023-11-26 11:59:46,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:46,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957392014] [2023-11-26 11:59:46,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:46,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:46,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:46,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:46,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957392014] [2023-11-26 11:59:46,985 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-26 11:59:46,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318122287] [2023-11-26 11:59:46,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:46,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:46,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe63ddc-b5a7-43d3-829f-dfeafb0f5b67/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:59:46,990 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe63ddc-b5a7-43d3-829f-dfeafb0f5b67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:59:47,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe63ddc-b5a7-43d3-829f-dfeafb0f5b67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 11:59:47,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:47,633 INFO L262 TraceCheckSpWp]: Trace formula consists of 2335 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:59:47,639 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:59:47,715 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-11-26 11:59:47,716 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:59:47,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318122287] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:59:47,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:59:47,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-26 11:59:47,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960093385] [2023-11-26 11:59:47,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:59:47,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:59:47,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:47,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:59:47,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:59:47,719 INFO L87 Difference]: Start difference. First operand 150 states and 193 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 4 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2023-11-26 11:59:48,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:48,354 INFO L93 Difference]: Finished difference Result 284 states and 373 transitions. [2023-11-26 11:59:48,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 11:59:48,355 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 4 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 111 [2023-11-26 11:59:48,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:48,358 INFO L225 Difference]: With dead ends: 284 [2023-11-26 11:59:48,359 INFO L226 Difference]: Without dead ends: 152 [2023-11-26 11:59:48,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-26 11:59:48,361 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 85 mSDsluCounter, 729 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 888 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:48,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 888 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-26 11:59:48,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2023-11-26 11:59:48,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2023-11-26 11:59:48,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 94 states have (on average 1.2234042553191489) internal successors, (115), 96 states have internal predecessors, (115), 40 states have call successors, (40), 16 states have call predecessors, (40), 17 states have return successors, (42), 39 states have call predecessors, (42), 39 states have call successors, (42) [2023-11-26 11:59:48,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 197 transitions. [2023-11-26 11:59:48,378 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 197 transitions. Word has length 111 [2023-11-26 11:59:48,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:48,379 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 197 transitions. [2023-11-26 11:59:48,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 4 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2023-11-26 11:59:48,379 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 197 transitions. [2023-11-26 11:59:48,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-11-26 11:59:48,381 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:48,381 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:48,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe63ddc-b5a7-43d3-829f-dfeafb0f5b67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 11:59:48,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe63ddc-b5a7-43d3-829f-dfeafb0f5b67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:48,592 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:59:48,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:48,592 INFO L85 PathProgramCache]: Analyzing trace with hash 164668786, now seen corresponding path program 1 times [2023-11-26 11:59:48,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:48,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302161977] [2023-11-26 11:59:48,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:48,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:48,737 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:59:48,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [48097257] [2023-11-26 11:59:48,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:48,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:48,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe63ddc-b5a7-43d3-829f-dfeafb0f5b67/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:59:48,739 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe63ddc-b5a7-43d3-829f-dfeafb0f5b67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:59:48,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe63ddc-b5a7-43d3-829f-dfeafb0f5b67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 11:59:49,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:49,390 INFO L262 TraceCheckSpWp]: Trace formula consists of 2469 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 11:59:49,397 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:59:49,428 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-11-26 11:59:49,428 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:59:49,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:49,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302161977] [2023-11-26 11:59:49,430 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:59:49,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48097257] [2023-11-26 11:59:49,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48097257] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:59:49,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:59:49,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:59:49,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771921984] [2023-11-26 11:59:49,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:59:49,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:59:49,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:49,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:59:49,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:59:49,434 INFO L87 Difference]: Start difference. First operand 152 states and 197 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-11-26 11:59:49,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:49,716 INFO L93 Difference]: Finished difference Result 272 states and 360 transitions. [2023-11-26 11:59:49,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:59:49,716 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 124 [2023-11-26 11:59:49,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:49,718 INFO L225 Difference]: With dead ends: 272 [2023-11-26 11:59:49,719 INFO L226 Difference]: Without dead ends: 157 [2023-11-26 11:59:49,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:59:49,720 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 10 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:49,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 527 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 11:59:49,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2023-11-26 11:59:49,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 154. [2023-11-26 11:59:49,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 96 states have (on average 1.21875) internal successors, (117), 98 states have internal predecessors, (117), 40 states have call successors, (40), 16 states have call predecessors, (40), 17 states have return successors, (42), 39 states have call predecessors, (42), 39 states have call successors, (42) [2023-11-26 11:59:49,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 199 transitions. [2023-11-26 11:59:49,735 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 199 transitions. Word has length 124 [2023-11-26 11:59:49,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:49,736 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 199 transitions. [2023-11-26 11:59:49,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-11-26 11:59:49,737 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 199 transitions. [2023-11-26 11:59:49,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-11-26 11:59:49,738 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:49,739 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:49,752 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe63ddc-b5a7-43d3-829f-dfeafb0f5b67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-26 11:59:49,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe63ddc-b5a7-43d3-829f-dfeafb0f5b67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:49,949 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:59:49,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:49,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1796905872, now seen corresponding path program 1 times [2023-11-26 11:59:49,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:49,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068455066] [2023-11-26 11:59:49,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:49,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:50,063 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:59:50,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1611862900] [2023-11-26 11:59:50,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:50,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:50,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe63ddc-b5a7-43d3-829f-dfeafb0f5b67/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:59:50,065 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe63ddc-b5a7-43d3-829f-dfeafb0f5b67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:59:50,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe63ddc-b5a7-43d3-829f-dfeafb0f5b67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 11:59:50,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:50,688 INFO L262 TraceCheckSpWp]: Trace formula consists of 2474 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-26 11:59:50,694 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:59:50,756 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-11-26 11:59:50,757 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:59:50,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:50,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068455066] [2023-11-26 11:59:50,757 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:59:50,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611862900] [2023-11-26 11:59:50,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611862900] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:59:50,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:59:50,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 11:59:50,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671704062] [2023-11-26 11:59:50,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:59:50,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 11:59:50,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:50,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 11:59:50,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:59:50,760 INFO L87 Difference]: Start difference. First operand 154 states and 199 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2023-11-26 11:59:51,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:51,206 INFO L93 Difference]: Finished difference Result 274 states and 355 transitions. [2023-11-26 11:59:51,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 11:59:51,206 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) Word has length 124 [2023-11-26 11:59:51,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:51,208 INFO L225 Difference]: With dead ends: 274 [2023-11-26 11:59:51,209 INFO L226 Difference]: Without dead ends: 154 [2023-11-26 11:59:51,209 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-26 11:59:51,210 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 52 mSDsluCounter, 586 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 749 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:51,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 749 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 11:59:51,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2023-11-26 11:59:51,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2023-11-26 11:59:51,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 96 states have (on average 1.2083333333333333) internal successors, (116), 98 states have internal predecessors, (116), 40 states have call successors, (40), 16 states have call predecessors, (40), 17 states have return successors, (42), 39 states have call predecessors, (42), 39 states have call successors, (42) [2023-11-26 11:59:51,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 198 transitions. [2023-11-26 11:59:51,223 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 198 transitions. Word has length 124 [2023-11-26 11:59:51,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:51,223 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 198 transitions. [2023-11-26 11:59:51,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2023-11-26 11:59:51,224 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 198 transitions. [2023-11-26 11:59:51,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2023-11-26 11:59:51,226 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:51,226 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:51,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe63ddc-b5a7-43d3-829f-dfeafb0f5b67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 11:59:51,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe63ddc-b5a7-43d3-829f-dfeafb0f5b67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:51,445 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:59:51,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:51,445 INFO L85 PathProgramCache]: Analyzing trace with hash -2109650347, now seen corresponding path program 1 times [2023-11-26 11:59:51,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:51,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918341336] [2023-11-26 11:59:51,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:51,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:51,570 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:59:51,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [84748261] [2023-11-26 11:59:51,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:51,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:51,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe63ddc-b5a7-43d3-829f-dfeafb0f5b67/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:59:51,572 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe63ddc-b5a7-43d3-829f-dfeafb0f5b67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:59:51,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe63ddc-b5a7-43d3-829f-dfeafb0f5b67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 11:59:52,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:52,210 INFO L262 TraceCheckSpWp]: Trace formula consists of 2543 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 11:59:52,216 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:59:52,231 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-11-26 11:59:52,231 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:59:52,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:52,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918341336] [2023-11-26 11:59:52,232 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:59:52,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84748261] [2023-11-26 11:59:52,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84748261] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:59:52,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:59:52,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:59:52,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444700806] [2023-11-26 11:59:52,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:59:52,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:59:52,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:52,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:59:52,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:59:52,235 INFO L87 Difference]: Start difference. First operand 154 states and 198 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2023-11-26 11:59:52,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:52,853 INFO L93 Difference]: Finished difference Result 275 states and 356 transitions. [2023-11-26 11:59:52,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:59:52,854 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 140 [2023-11-26 11:59:52,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:52,858 INFO L225 Difference]: With dead ends: 275 [2023-11-26 11:59:52,858 INFO L226 Difference]: Without dead ends: 158 [2023-11-26 11:59:52,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:59:52,860 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 3 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:52,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 521 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-26 11:59:52,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2023-11-26 11:59:52,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 156. [2023-11-26 11:59:52,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 98 states have (on average 1.2040816326530612) internal successors, (118), 100 states have internal predecessors, (118), 40 states have call successors, (40), 16 states have call predecessors, (40), 17 states have return successors, (42), 39 states have call predecessors, (42), 39 states have call successors, (42) [2023-11-26 11:59:52,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 200 transitions. [2023-11-26 11:59:52,876 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 200 transitions. Word has length 140 [2023-11-26 11:59:52,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:52,877 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 200 transitions. [2023-11-26 11:59:52,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2023-11-26 11:59:52,878 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 200 transitions. [2023-11-26 11:59:52,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2023-11-26 11:59:52,881 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:52,881 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:52,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe63ddc-b5a7-43d3-829f-dfeafb0f5b67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 11:59:53,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe63ddc-b5a7-43d3-829f-dfeafb0f5b67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:53,092 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:59:53,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:53,092 INFO L85 PathProgramCache]: Analyzing trace with hash -848733097, now seen corresponding path program 1 times [2023-11-26 11:59:53,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:53,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519510897] [2023-11-26 11:59:53,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:53,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:53,190 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:59:53,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1763874173] [2023-11-26 11:59:53,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:53,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:53,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe63ddc-b5a7-43d3-829f-dfeafb0f5b67/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:59:53,192 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe63ddc-b5a7-43d3-829f-dfeafb0f5b67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:59:53,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe63ddc-b5a7-43d3-829f-dfeafb0f5b67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 11:59:53,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:53,871 INFO L262 TraceCheckSpWp]: Trace formula consists of 2538 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 11:59:53,877 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:59:53,979 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-11-26 11:59:53,980 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:59:53,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:53,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519510897] [2023-11-26 11:59:53,980 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:59:53,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763874173] [2023-11-26 11:59:53,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763874173] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:59:53,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:59:53,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-26 11:59:53,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599268390] [2023-11-26 11:59:53,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:59:53,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 11:59:53,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:53,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 11:59:53,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:59:53,983 INFO L87 Difference]: Start difference. First operand 156 states and 200 transitions. Second operand has 8 states, 8 states have (on average 8.25) internal successors, (66), 8 states have internal predecessors, (66), 5 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) [2023-11-26 11:59:54,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:54,878 INFO L93 Difference]: Finished difference Result 293 states and 378 transitions. [2023-11-26 11:59:54,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 11:59:54,888 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.25) internal successors, (66), 8 states have internal predecessors, (66), 5 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) Word has length 140 [2023-11-26 11:59:54,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:54,891 INFO L225 Difference]: With dead ends: 293 [2023-11-26 11:59:54,892 INFO L226 Difference]: Without dead ends: 156 [2023-11-26 11:59:54,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-11-26 11:59:54,898 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 103 mSDsluCounter, 836 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 988 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:54,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 988 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-26 11:59:54,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2023-11-26 11:59:54,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2023-11-26 11:59:54,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 98 states have (on average 1.2040816326530612) internal successors, (118), 100 states have internal predecessors, (118), 40 states have call successors, (40), 16 states have call predecessors, (40), 17 states have return successors, (41), 39 states have call predecessors, (41), 39 states have call successors, (41) [2023-11-26 11:59:54,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 199 transitions. [2023-11-26 11:59:54,924 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 199 transitions. Word has length 140 [2023-11-26 11:59:54,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:54,926 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 199 transitions. [2023-11-26 11:59:54,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.25) internal successors, (66), 8 states have internal predecessors, (66), 5 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) [2023-11-26 11:59:54,926 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 199 transitions. [2023-11-26 11:59:54,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2023-11-26 11:59:54,929 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:54,930 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:54,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe63ddc-b5a7-43d3-829f-dfeafb0f5b67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 11:59:55,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe63ddc-b5a7-43d3-829f-dfeafb0f5b67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:55,141 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:59:55,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:55,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1638894968, now seen corresponding path program 2 times [2023-11-26 11:59:55,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:55,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437466999] [2023-11-26 11:59:55,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:55,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:55,246 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:59:55,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2124465683] [2023-11-26 11:59:55,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:59:55,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:55,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe63ddc-b5a7-43d3-829f-dfeafb0f5b67/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:59:55,248 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe63ddc-b5a7-43d3-829f-dfeafb0f5b67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:59:55,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe63ddc-b5a7-43d3-829f-dfeafb0f5b67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 11:59:56,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 11:59:56,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:59:56,445 INFO L262 TraceCheckSpWp]: Trace formula consists of 2677 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-26 11:59:56,452 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:59:56,527 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2023-11-26 11:59:56,527 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:59:56,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:56,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437466999] [2023-11-26 11:59:56,528 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:59:56,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124465683] [2023-11-26 11:59:56,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124465683] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:59:56,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:59:56,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 11:59:56,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251358681] [2023-11-26 11:59:56,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:59:56,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 11:59:56,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:56,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 11:59:56,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:59:56,531 INFO L87 Difference]: Start difference. First operand 156 states and 199 transitions. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 4 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 4 states have call predecessors, (20), 3 states have call successors, (20) [2023-11-26 11:59:56,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:56,981 INFO L93 Difference]: Finished difference Result 258 states and 326 transitions. [2023-11-26 11:59:56,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:59:56,982 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 4 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 4 states have call predecessors, (20), 3 states have call successors, (20) Word has length 153 [2023-11-26 11:59:56,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:56,984 INFO L225 Difference]: With dead ends: 258 [2023-11-26 11:59:56,984 INFO L226 Difference]: Without dead ends: 154 [2023-11-26 11:59:56,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:59:56,985 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 20 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 763 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:56,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 763 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 11:59:56,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2023-11-26 11:59:56,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2023-11-26 11:59:56,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 97 states have (on average 1.1958762886597938) internal successors, (116), 98 states have internal predecessors, (116), 40 states have call successors, (40), 16 states have call predecessors, (40), 16 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2023-11-26 11:59:56,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 195 transitions. [2023-11-26 11:59:56,995 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 195 transitions. Word has length 153 [2023-11-26 11:59:56,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:56,996 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 195 transitions. [2023-11-26 11:59:56,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 4 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 4 states have call predecessors, (20), 3 states have call successors, (20) [2023-11-26 11:59:56,996 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 195 transitions. [2023-11-26 11:59:56,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2023-11-26 11:59:56,999 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:56,999 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:57,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe63ddc-b5a7-43d3-829f-dfeafb0f5b67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 11:59:57,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe63ddc-b5a7-43d3-829f-dfeafb0f5b67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-26 11:59:57,211 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:59:57,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:57,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1196179990, now seen corresponding path program 1 times [2023-11-26 11:59:57,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:57,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700529111] [2023-11-26 11:59:57,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:57,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:57,336 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:59:57,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1469448905] [2023-11-26 11:59:57,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:57,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:57,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe63ddc-b5a7-43d3-829f-dfeafb0f5b67/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:59:57,340 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe63ddc-b5a7-43d3-829f-dfeafb0f5b67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:59:57,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe63ddc-b5a7-43d3-829f-dfeafb0f5b67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 11:59:58,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:58,087 INFO L262 TraceCheckSpWp]: Trace formula consists of 2955 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-26 11:59:58,132 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:59:58,443 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-11-26 11:59:58,443 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:59:58,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:58,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700529111] [2023-11-26 11:59:58,444 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:59:58,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469448905] [2023-11-26 11:59:58,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469448905] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:59:58,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:59:58,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-26 11:59:58,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805122552] [2023-11-26 11:59:58,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:59:58,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-26 11:59:58,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:58,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-26 11:59:58,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2023-11-26 11:59:58,447 INFO L87 Difference]: Start difference. First operand 154 states and 195 transitions. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 6 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) [2023-11-26 12:00:00,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:00:00,623 INFO L93 Difference]: Finished difference Result 292 states and 376 transitions. [2023-11-26 12:00:00,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-26 12:00:00,628 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 6 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) Word has length 179 [2023-11-26 12:00:00,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:00:00,630 INFO L225 Difference]: With dead ends: 292 [2023-11-26 12:00:00,631 INFO L226 Difference]: Without dead ends: 175 [2023-11-26 12:00:00,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-11-26 12:00:00,632 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 125 mSDsluCounter, 1073 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 1224 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-26 12:00:00,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 1224 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-26 12:00:00,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2023-11-26 12:00:00,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 163. [2023-11-26 12:00:00,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 105 states have (on average 1.2) internal successors, (126), 106 states have internal predecessors, (126), 40 states have call successors, (40), 16 states have call predecessors, (40), 17 states have return successors, (43), 40 states have call predecessors, (43), 39 states have call successors, (43) [2023-11-26 12:00:00,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 209 transitions. [2023-11-26 12:00:00,646 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 209 transitions. Word has length 179 [2023-11-26 12:00:00,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:00:00,646 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 209 transitions. [2023-11-26 12:00:00,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 6 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) [2023-11-26 12:00:00,647 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 209 transitions. [2023-11-26 12:00:00,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2023-11-26 12:00:00,649 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:00:00,650 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:00:00,669 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe63ddc-b5a7-43d3-829f-dfeafb0f5b67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-26 12:00:00,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe63ddc-b5a7-43d3-829f-dfeafb0f5b67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:00,869 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:00:00,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:00,869 INFO L85 PathProgramCache]: Analyzing trace with hash 609903768, now seen corresponding path program 1 times [2023-11-26 12:00:00,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:00,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104292821] [2023-11-26 12:00:00,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:00,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:00,979 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 12:00:00,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1192385675] [2023-11-26 12:00:00,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:00,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:00,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe63ddc-b5a7-43d3-829f-dfeafb0f5b67/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:00:00,981 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe63ddc-b5a7-43d3-829f-dfeafb0f5b67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:00:01,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe63ddc-b5a7-43d3-829f-dfeafb0f5b67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-26 12:00:01,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:01,699 INFO L262 TraceCheckSpWp]: Trace formula consists of 2950 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-26 12:00:01,706 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:00:01,922 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2023-11-26 12:00:01,922 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 12:00:01,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:00:01,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104292821] [2023-11-26 12:00:01,923 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 12:00:01,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192385675] [2023-11-26 12:00:01,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192385675] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:00:01,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:00:01,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 12:00:01,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470523823] [2023-11-26 12:00:01,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:00:01,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 12:00:01,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:00:01,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 12:00:01,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-26 12:00:01,927 INFO L87 Difference]: Start difference. First operand 163 states and 209 transitions. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2023-11-26 12:00:03,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:00:03,416 INFO L93 Difference]: Finished difference Result 304 states and 393 transitions. [2023-11-26 12:00:03,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 12:00:03,417 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 179 [2023-11-26 12:00:03,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:00:03,419 INFO L225 Difference]: With dead ends: 304 [2023-11-26 12:00:03,419 INFO L226 Difference]: Without dead ends: 178 [2023-11-26 12:00:03,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-11-26 12:00:03,420 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 14 mSDsluCounter, 585 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 759 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-26 12:00:03,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 759 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-26 12:00:03,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2023-11-26 12:00:03,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 169. [2023-11-26 12:00:03,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 111 states have (on average 1.1981981981981982) internal successors, (133), 112 states have internal predecessors, (133), 40 states have call successors, (40), 16 states have call predecessors, (40), 17 states have return successors, (43), 40 states have call predecessors, (43), 39 states have call successors, (43) [2023-11-26 12:00:03,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 216 transitions. [2023-11-26 12:00:03,433 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 216 transitions. Word has length 179 [2023-11-26 12:00:03,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:00:03,434 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 216 transitions. [2023-11-26 12:00:03,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2023-11-26 12:00:03,434 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 216 transitions. [2023-11-26 12:00:03,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2023-11-26 12:00:03,437 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:00:03,437 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:00:03,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe63ddc-b5a7-43d3-829f-dfeafb0f5b67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-26 12:00:03,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe63ddc-b5a7-43d3-829f-dfeafb0f5b67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-26 12:00:03,644 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:00:03,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:03,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1703532052, now seen corresponding path program 1 times [2023-11-26 12:00:03,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:03,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421191342] [2023-11-26 12:00:03,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:03,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:03,770 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 12:00:03,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1678729269] [2023-11-26 12:00:03,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:03,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:03,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe63ddc-b5a7-43d3-829f-dfeafb0f5b67/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:00:03,772 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe63ddc-b5a7-43d3-829f-dfeafb0f5b67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:00:03,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe63ddc-b5a7-43d3-829f-dfeafb0f5b67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-26 12:00:04,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:04,614 INFO L262 TraceCheckSpWp]: Trace formula consists of 2958 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-26 12:00:04,629 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:00:04,684 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2023-11-26 12:00:04,684 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 12:00:04,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:00:04,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421191342] [2023-11-26 12:00:04,685 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 12:00:04,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678729269] [2023-11-26 12:00:04,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678729269] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:00:04,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:00:04,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 12:00:04,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846960287] [2023-11-26 12:00:04,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:00:04,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 12:00:04,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:00:04,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 12:00:04,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 12:00:04,687 INFO L87 Difference]: Start difference. First operand 169 states and 216 transitions. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2023-11-26 12:00:05,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:00:05,098 INFO L93 Difference]: Finished difference Result 313 states and 403 transitions. [2023-11-26 12:00:05,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 12:00:05,099 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 179 [2023-11-26 12:00:05,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:00:05,101 INFO L225 Difference]: With dead ends: 313 [2023-11-26 12:00:05,101 INFO L226 Difference]: Without dead ends: 181 [2023-11-26 12:00:05,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-26 12:00:05,103 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 7 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 688 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 12:00:05,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 688 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 12:00:05,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2023-11-26 12:00:05,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 177. [2023-11-26 12:00:05,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 119 states have (on average 1.2016806722689075) internal successors, (143), 120 states have internal predecessors, (143), 40 states have call successors, (40), 16 states have call predecessors, (40), 17 states have return successors, (43), 40 states have call predecessors, (43), 39 states have call successors, (43) [2023-11-26 12:00:05,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 226 transitions. [2023-11-26 12:00:05,116 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 226 transitions. Word has length 179 [2023-11-26 12:00:05,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:00:05,117 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 226 transitions. [2023-11-26 12:00:05,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2023-11-26 12:00:05,117 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 226 transitions. [2023-11-26 12:00:05,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2023-11-26 12:00:05,120 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:00:05,120 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:00:05,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe63ddc-b5a7-43d3-829f-dfeafb0f5b67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-26 12:00:05,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe63ddc-b5a7-43d3-829f-dfeafb0f5b67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:05,332 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:00:05,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:05,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1073466414, now seen corresponding path program 1 times [2023-11-26 12:00:05,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:05,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463420394] [2023-11-26 12:00:05,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:05,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:05,508 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 12:00:05,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2045767180] [2023-11-26 12:00:05,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:05,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:05,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe63ddc-b5a7-43d3-829f-dfeafb0f5b67/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:00:05,510 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe63ddc-b5a7-43d3-829f-dfeafb0f5b67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:00:05,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe63ddc-b5a7-43d3-829f-dfeafb0f5b67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-26 12:00:06,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:06,274 INFO L262 TraceCheckSpWp]: Trace formula consists of 2955 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 12:00:06,280 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:00:06,362 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2023-11-26 12:00:06,362 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 12:00:06,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:00:06,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463420394] [2023-11-26 12:00:06,363 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 12:00:06,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045767180] [2023-11-26 12:00:06,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045767180] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:00:06,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:00:06,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 12:00:06,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486253241] [2023-11-26 12:00:06,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:00:06,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 12:00:06,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:00:06,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 12:00:06,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 12:00:06,366 INFO L87 Difference]: Start difference. First operand 177 states and 226 transitions. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2023-11-26 12:00:07,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:00:07,407 INFO L93 Difference]: Finished difference Result 317 states and 411 transitions. [2023-11-26 12:00:07,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 12:00:07,407 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 181 [2023-11-26 12:00:07,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:00:07,409 INFO L225 Difference]: With dead ends: 317 [2023-11-26 12:00:07,410 INFO L226 Difference]: Without dead ends: 177 [2023-11-26 12:00:07,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-26 12:00:07,411 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 10 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 627 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-26 12:00:07,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 627 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-26 12:00:07,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2023-11-26 12:00:07,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2023-11-26 12:00:07,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 119 states have (on average 1.1932773109243697) internal successors, (142), 120 states have internal predecessors, (142), 40 states have call successors, (40), 16 states have call predecessors, (40), 17 states have return successors, (43), 40 states have call predecessors, (43), 39 states have call successors, (43) [2023-11-26 12:00:07,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 225 transitions. [2023-11-26 12:00:07,425 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 225 transitions. Word has length 181 [2023-11-26 12:00:07,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:00:07,425 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 225 transitions. [2023-11-26 12:00:07,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2023-11-26 12:00:07,426 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 225 transitions. [2023-11-26 12:00:07,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2023-11-26 12:00:07,428 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:00:07,429 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:00:07,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe63ddc-b5a7-43d3-829f-dfeafb0f5b67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-26 12:00:07,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe63ddc-b5a7-43d3-829f-dfeafb0f5b67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:07,641 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:00:07,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:07,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1870115664, now seen corresponding path program 1 times [2023-11-26 12:00:07,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:07,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754543645] [2023-11-26 12:00:07,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:07,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:07,749 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 12:00:07,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [351680097] [2023-11-26 12:00:07,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:07,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:07,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe63ddc-b5a7-43d3-829f-dfeafb0f5b67/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:00:07,752 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe63ddc-b5a7-43d3-829f-dfeafb0f5b67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:00:07,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe63ddc-b5a7-43d3-829f-dfeafb0f5b67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-26 12:00:08,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:08,565 INFO L262 TraceCheckSpWp]: Trace formula consists of 2960 conjuncts, 83 conjunts are in the unsatisfiable core [2023-11-26 12:00:08,574 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:00:08,750 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-26 12:00:08,754 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-26 12:00:10,749 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-26 12:00:10,750 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 13 [2023-11-26 12:00:10,764 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-26 12:00:10,765 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 20 [2023-11-26 12:00:10,772 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-26 12:00:10,773 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2023-11-26 12:00:10,940 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 132 proven. 4 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2023-11-26 12:00:10,940 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:00:11,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:00:11,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754543645] [2023-11-26 12:00:11,750 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 12:00:11,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351680097] [2023-11-26 12:00:11,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351680097] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:00:11,750 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-26 12:00:11,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2023-11-26 12:00:11,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806896407] [2023-11-26 12:00:11,751 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-26 12:00:11,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-26 12:00:11,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:00:11,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-26 12:00:11,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2023-11-26 12:00:11,755 INFO L87 Difference]: Start difference. First operand 177 states and 225 transitions. Second operand has 19 states, 18 states have (on average 4.555555555555555) internal successors, (82), 18 states have internal predecessors, (82), 8 states have call successors, (23), 4 states have call predecessors, (23), 5 states have return successors, (22), 7 states have call predecessors, (22), 8 states have call successors, (22) [2023-11-26 12:00:16,869 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-26 12:00:22,215 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-26 12:00:26,322 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]