./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_array_list_init_dynamic_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_095c9576-c743-4299-ac79-4195ff03091a/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_095c9576-c743-4299-ac79-4195ff03091a/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_095c9576-c743-4299-ac79-4195ff03091a/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_095c9576-c743-4299-ac79-4195ff03091a/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_array_list_init_dynamic_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_095c9576-c743-4299-ac79-4195ff03091a/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_095c9576-c743-4299-ac79-4195ff03091a/bin/uautomizer-verify-BQ2R08f2Ya --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 ffbf3b1479afd9aaa2ec45fcd2782998a39316f97238379433376f7ba5094eb5 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-28 20:20:41,076 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-28 20:20:41,141 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_095c9576-c743-4299-ac79-4195ff03091a/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-64bit-Automizer_Default.epf [2023-11-28 20:20:41,147 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-28 20:20:41,147 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-28 20:20:41,171 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-28 20:20:41,172 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-28 20:20:41,172 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-28 20:20:41,173 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-28 20:20:41,174 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-28 20:20:41,174 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-28 20:20:41,175 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-28 20:20:41,176 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-28 20:20:41,176 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-28 20:20:41,177 INFO L153 SettingsManager]: * Use SBE=true [2023-11-28 20:20:41,177 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-28 20:20:41,178 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-28 20:20:41,179 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-28 20:20:41,179 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-28 20:20:41,180 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-28 20:20:41,180 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-28 20:20:41,181 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-28 20:20:41,182 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-28 20:20:41,182 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-28 20:20:41,183 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-28 20:20:41,183 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-28 20:20:41,183 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-28 20:20:41,184 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-28 20:20:41,184 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 20:20:41,185 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-28 20:20:41,185 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-28 20:20:41,185 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-28 20:20:41,186 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-28 20:20:41,186 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-28 20:20:41,186 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-28 20:20:41,186 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-28 20:20:41,186 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-28 20:20:41,187 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-28 20:20:41,187 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-28 20:20:41,187 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_095c9576-c743-4299-ac79-4195ff03091a/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_095c9576-c743-4299-ac79-4195ff03091a/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ffbf3b1479afd9aaa2ec45fcd2782998a39316f97238379433376f7ba5094eb5 [2023-11-28 20:20:41,402 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-28 20:20:41,423 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-28 20:20:41,425 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-28 20:20:41,426 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-28 20:20:41,427 INFO L274 PluginConnector]: CDTParser initialized [2023-11-28 20:20:41,428 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_095c9576-c743-4299-ac79-4195ff03091a/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/aws-c-common/aws_array_list_init_dynamic_harness.i [2023-11-28 20:20:44,195 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-28 20:20:44,596 INFO L384 CDTParser]: Found 1 translation units. [2023-11-28 20:20:44,596 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_095c9576-c743-4299-ac79-4195ff03091a/sv-benchmarks/c/aws-c-common/aws_array_list_init_dynamic_harness.i [2023-11-28 20:20:44,627 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_095c9576-c743-4299-ac79-4195ff03091a/bin/uautomizer-verify-BQ2R08f2Ya/data/4ad113cd4/4278eee42c1b4134ab6c5d2253b96357/FLAG183783d82 [2023-11-28 20:20:44,642 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_095c9576-c743-4299-ac79-4195ff03091a/bin/uautomizer-verify-BQ2R08f2Ya/data/4ad113cd4/4278eee42c1b4134ab6c5d2253b96357 [2023-11-28 20:20:44,645 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-28 20:20:44,646 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-28 20:20:44,648 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-28 20:20:44,648 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-28 20:20:44,654 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-28 20:20:44,654 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:20:44" (1/1) ... [2023-11-28 20:20:44,656 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56f4856e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:20:44, skipping insertion in model container [2023-11-28 20:20:44,656 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:20:44" (1/1) ... [2023-11-28 20:20:44,788 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-28 20:20:45,009 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_095c9576-c743-4299-ac79-4195ff03091a/sv-benchmarks/c/aws-c-common/aws_array_list_init_dynamic_harness.i[4501,4514] [2023-11-28 20:20:45,015 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_095c9576-c743-4299-ac79-4195ff03091a/sv-benchmarks/c/aws-c-common/aws_array_list_init_dynamic_harness.i[4561,4574] [2023-11-28 20:20:45,892 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-28 20:20:45,893 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-28 20:20:45,893 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-28 20:20:45,894 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-28 20:20:45,896 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-28 20:20:45,910 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-28 20:20:45,910 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-28 20:20:45,912 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-28 20:20:45,914 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-28 20:20:45,916 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-28 20:20:45,917 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-28 20:20:45,918 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-28 20:20:45,918 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-28 20:20:46,257 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-28 20:20:46,258 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-28 20:20:46,259 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-28 20:20:46,260 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-28 20:20:46,262 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-28 20:20:46,263 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-28 20:20:46,263 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-28 20:20:46,264 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-28 20:20:46,265 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-28 20:20:46,265 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-28 20:20:46,387 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-28 20:20:46,392 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-28 20:20:46,440 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 20:20:46,471 INFO L202 MainTranslator]: Completed pre-run [2023-11-28 20:20:46,482 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_095c9576-c743-4299-ac79-4195ff03091a/sv-benchmarks/c/aws-c-common/aws_array_list_init_dynamic_harness.i[4501,4514] [2023-11-28 20:20:46,482 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_095c9576-c743-4299-ac79-4195ff03091a/sv-benchmarks/c/aws-c-common/aws_array_list_init_dynamic_harness.i[4561,4574] [2023-11-28 20:20:46,540 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-28 20:20:46,541 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-28 20:20:46,541 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-28 20:20:46,542 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-28 20:20:46,543 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-28 20:20:46,550 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-28 20:20:46,551 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-28 20:20:46,552 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-28 20:20:46,553 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-28 20:20:46,554 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-28 20:20:46,555 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-28 20:20:46,556 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-28 20:20:46,556 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-28 20:20:46,595 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-28 20:20:46,596 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-28 20:20:46,597 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-28 20:20:46,598 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-28 20:20:46,599 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-28 20:20:46,600 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-28 20:20:46,601 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-28 20:20:46,601 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-28 20:20:46,602 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-28 20:20:46,603 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-28 20:20:46,624 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-28 20:20:46,630 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-28 20:20:46,639 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : : "r"(pBuf) : "memory"); [7529-7540] [2023-11-28 20:20:46,660 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 20:20:46,928 WARN L675 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-28 20:20:46,928 WARN L675 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-28 20:20:46,929 WARN L675 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-28 20:20:46,929 WARN L675 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-28 20:20:46,929 WARN L675 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-28 20:20:46,929 WARN L675 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-28 20:20:46,929 WARN L675 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-28 20:20:46,929 WARN L675 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-28 20:20:46,930 WARN L675 CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-28 20:20:46,930 WARN L675 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-28 20:20:46,930 WARN L675 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-28 20:20:46,930 WARN L675 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-28 20:20:46,930 WARN L675 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-28 20:20:46,930 WARN L675 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-28 20:20:46,931 WARN L675 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-28 20:20:46,939 INFO L206 MainTranslator]: Completed translation [2023-11-28 20:20:46,939 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:20:46 WrapperNode [2023-11-28 20:20:46,955 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-28 20:20:46,956 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-28 20:20:46,956 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-28 20:20:46,956 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-28 20:20:46,964 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:20:46" (1/1) ... [2023-11-28 20:20:47,045 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:20:46" (1/1) ... [2023-11-28 20:20:47,112 INFO L138 Inliner]: procedures = 689, calls = 1562, calls flagged for inlining = 47, calls inlined = 6, statements flattened = 596 [2023-11-28 20:20:47,113 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-28 20:20:47,113 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-28 20:20:47,113 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-28 20:20:47,113 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-28 20:20:47,123 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:20:46" (1/1) ... [2023-11-28 20:20:47,123 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:20:46" (1/1) ... [2023-11-28 20:20:47,132 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:20:46" (1/1) ... [2023-11-28 20:20:47,190 INFO L175 MemorySlicer]: Split 278 memory accesses to 6 slices as follows [2, 5, 236, 26, 6, 3]. 85 percent of accesses are in the largest equivalence class. The 252 initializations are split as follows [2, 5, 236, 5, 1, 3]. The 6 writes are split as follows [0, 0, 0, 5, 1, 0]. [2023-11-28 20:20:47,191 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:20:46" (1/1) ... [2023-11-28 20:20:47,191 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:20:46" (1/1) ... [2023-11-28 20:20:47,218 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:20:46" (1/1) ... [2023-11-28 20:20:47,224 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:20:46" (1/1) ... [2023-11-28 20:20:47,233 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:20:46" (1/1) ... [2023-11-28 20:20:47,238 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:20:46" (1/1) ... [2023-11-28 20:20:47,251 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-28 20:20:47,252 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-28 20:20:47,252 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-28 20:20:47,252 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-28 20:20:47,253 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:20:46" (1/1) ... [2023-11-28 20:20:47,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 20:20:47,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_095c9576-c743-4299-ac79-4195ff03091a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:20:47,281 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_095c9576-c743-4299-ac79-4195ff03091a/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-28 20:20:47,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_095c9576-c743-4299-ac79-4195ff03091a/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-28 20:20:47,314 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2023-11-28 20:20:47,314 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2023-11-28 20:20:47,314 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-28 20:20:47,314 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_valid [2023-11-28 20:20:47,314 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_valid [2023-11-28 20:20:47,314 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2023-11-28 20:20:47,314 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2023-11-28 20:20:47,315 INFO L130 BoogieDeclarations]: Found specification of procedure aws_allocator_is_valid [2023-11-28 20:20:47,315 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_allocator_is_valid [2023-11-28 20:20:47,315 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-28 20:20:47,315 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-28 20:20:47,315 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-28 20:20:47,315 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-28 20:20:47,316 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-28 20:20:47,316 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2023-11-28 20:20:47,316 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2023-11-28 20:20:47,316 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2023-11-28 20:20:47,316 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-28 20:20:47,316 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-28 20:20:47,316 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-28 20:20:47,317 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-28 20:20:47,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-28 20:20:47,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-28 20:20:47,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-28 20:20:47,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2023-11-28 20:20:47,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#4 [2023-11-28 20:20:47,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#5 [2023-11-28 20:20:47,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-28 20:20:47,318 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-28 20:20:47,318 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2023-11-28 20:20:47,318 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2023-11-28 20:20:47,318 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2023-11-28 20:20:47,318 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2023-11-28 20:20:47,319 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_malloc [2023-11-28 20:20:47,319 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_malloc [2023-11-28 20:20:47,319 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#0 [2023-11-28 20:20:47,319 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#1 [2023-11-28 20:20:47,319 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#2 [2023-11-28 20:20:47,319 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#3 [2023-11-28 20:20:47,319 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#4 [2023-11-28 20:20:47,320 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#5 [2023-11-28 20:20:47,320 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#0 [2023-11-28 20:20:47,320 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#1 [2023-11-28 20:20:47,320 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#2 [2023-11-28 20:20:47,320 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#3 [2023-11-28 20:20:47,320 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#4 [2023-11-28 20:20:47,320 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#5 [2023-11-28 20:20:47,321 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-28 20:20:47,321 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-28 20:20:47,321 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_acquire [2023-11-28 20:20:47,321 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_acquire [2023-11-28 20:20:47,321 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-28 20:20:47,321 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-28 20:20:47,321 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-28 20:20:47,321 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-28 20:20:47,321 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2023-11-28 20:20:47,321 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#4 [2023-11-28 20:20:47,322 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#5 [2023-11-28 20:20:47,322 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2023-11-28 20:20:47,322 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2023-11-28 20:20:47,322 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2023-11-28 20:20:47,322 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2023-11-28 20:20:47,322 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#4 [2023-11-28 20:20:47,322 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#5 [2023-11-28 20:20:47,323 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2023-11-28 20:20:47,323 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2023-11-28 20:20:47,323 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2023-11-28 20:20:47,323 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2023-11-28 20:20:47,323 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-28 20:20:47,323 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-28 20:20:47,323 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-28 20:20:47,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-28 20:20:47,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-28 20:20:47,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2023-11-28 20:20:47,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-28 20:20:47,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-28 20:20:47,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-28 20:20:47,325 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-28 20:20:47,325 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-28 20:20:47,325 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-11-28 20:20:47,587 INFO L241 CfgBuilder]: Building ICFG [2023-11-28 20:20:47,590 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-28 20:20:48,340 INFO L282 CfgBuilder]: Performing block encoding [2023-11-28 20:20:48,455 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-28 20:20:48,455 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-28 20:20:48,455 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:20:48 BoogieIcfgContainer [2023-11-28 20:20:48,456 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-28 20:20:48,458 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-28 20:20:48,458 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-28 20:20:48,461 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-28 20:20:48,461 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 08:20:44" (1/3) ... [2023-11-28 20:20:48,462 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fc26e6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:20:48, skipping insertion in model container [2023-11-28 20:20:48,462 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:20:46" (2/3) ... [2023-11-28 20:20:48,462 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fc26e6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:20:48, skipping insertion in model container [2023-11-28 20:20:48,463 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:20:48" (3/3) ... [2023-11-28 20:20:48,464 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_array_list_init_dynamic_harness.i [2023-11-28 20:20:48,478 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-28 20:20:48,479 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-28 20:20:48,524 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-28 20:20:48,531 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;@22bfddd6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-28 20:20:48,531 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-28 20:20:48,535 INFO L276 IsEmpty]: Start isEmpty. Operand has 121 states, 72 states have (on average 1.2777777777777777) internal successors, (92), 73 states have internal predecessors, (92), 34 states have call successors, (34), 14 states have call predecessors, (34), 14 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2023-11-28 20:20:48,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-28 20:20:48,545 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:20:48,545 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:20:48,546 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:20:48,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:20:48,552 INFO L85 PathProgramCache]: Analyzing trace with hash 939421649, now seen corresponding path program 1 times [2023-11-28 20:20:48,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:20:48,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681474929] [2023-11-28 20:20:48,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:20:48,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:20:48,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:20:48,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:20:48,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681474929] [2023-11-28 20:20:48,928 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-28 20:20:48,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679574160] [2023-11-28 20:20:48,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:20:48,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:20:48,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_095c9576-c743-4299-ac79-4195ff03091a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:20:48,932 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_095c9576-c743-4299-ac79-4195ff03091a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:20:48,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_095c9576-c743-4299-ac79-4195ff03091a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-28 20:20:49,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:20:49,468 INFO L262 TraceCheckSpWp]: Trace formula consists of 1967 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-28 20:20:49,475 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:20:49,498 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-28 20:20:49,498 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:20:49,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679574160] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:20:49,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:20:49,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-28 20:20:49,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488474522] [2023-11-28 20:20:49,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:20:49,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-28 20:20:49,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:20:49,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-28 20:20:49,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-28 20:20:49,531 INFO L87 Difference]: Start difference. First operand has 121 states, 72 states have (on average 1.2777777777777777) internal successors, (92), 73 states have internal predecessors, (92), 34 states have call successors, (34), 14 states have call predecessors, (34), 14 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) Second operand has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-28 20:20:49,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:20:49,664 INFO L93 Difference]: Finished difference Result 238 states and 336 transitions. [2023-11-28 20:20:49,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-28 20:20:49,666 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 50 [2023-11-28 20:20:49,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:20:49,675 INFO L225 Difference]: With dead ends: 238 [2023-11-28 20:20:49,675 INFO L226 Difference]: Without dead ends: 117 [2023-11-28 20:20:49,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-28 20:20:49,682 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 20:20:49,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 142 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 20:20:49,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-11-28 20:20:49,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2023-11-28 20:20:49,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 68 states have (on average 1.2352941176470589) internal successors, (84), 70 states have internal predecessors, (84), 34 states have call successors, (34), 14 states have call predecessors, (34), 14 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2023-11-28 20:20:49,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 150 transitions. [2023-11-28 20:20:49,728 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 150 transitions. Word has length 50 [2023-11-28 20:20:49,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:20:49,730 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 150 transitions. [2023-11-28 20:20:49,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-28 20:20:49,730 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 150 transitions. [2023-11-28 20:20:49,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-28 20:20:49,733 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:20:49,733 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:20:49,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_095c9576-c743-4299-ac79-4195ff03091a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-28 20:20:49,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_095c9576-c743-4299-ac79-4195ff03091a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:20:49,934 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:20:49,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:20:49,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1591418000, now seen corresponding path program 1 times [2023-11-28 20:20:49,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:20:49,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605077878] [2023-11-28 20:20:49,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:20:49,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:20:50,023 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:20:50,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [655170267] [2023-11-28 20:20:50,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:20:50,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:20:50,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_095c9576-c743-4299-ac79-4195ff03091a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:20:50,024 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_095c9576-c743-4299-ac79-4195ff03091a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:20:50,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_095c9576-c743-4299-ac79-4195ff03091a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-28 20:20:50,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:20:50,542 INFO L262 TraceCheckSpWp]: Trace formula consists of 1995 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-28 20:20:50,547 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:20:50,585 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-28 20:20:50,585 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:20:50,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:20:50,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605077878] [2023-11-28 20:20:50,585 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:20:50,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655170267] [2023-11-28 20:20:50,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655170267] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:20:50,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:20:50,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-28 20:20:50,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603464097] [2023-11-28 20:20:50,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:20:50,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 20:20:50,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:20:50,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 20:20:50,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-28 20:20:50,589 INFO L87 Difference]: Start difference. First operand 117 states and 150 transitions. Second operand has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-28 20:20:51,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:20:51,022 INFO L93 Difference]: Finished difference Result 223 states and 283 transitions. [2023-11-28 20:20:51,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 20:20:51,022 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 55 [2023-11-28 20:20:51,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:20:51,025 INFO L225 Difference]: With dead ends: 223 [2023-11-28 20:20:51,025 INFO L226 Difference]: Without dead ends: 118 [2023-11-28 20:20:51,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-28 20:20:51,028 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 1 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-28 20:20:51,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 409 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-28 20:20:51,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2023-11-28 20:20:51,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2023-11-28 20:20:51,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 69 states have (on average 1.2318840579710144) internal successors, (85), 71 states have internal predecessors, (85), 34 states have call successors, (34), 14 states have call predecessors, (34), 14 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2023-11-28 20:20:51,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 151 transitions. [2023-11-28 20:20:51,046 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 151 transitions. Word has length 55 [2023-11-28 20:20:51,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:20:51,047 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 151 transitions. [2023-11-28 20:20:51,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-28 20:20:51,047 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 151 transitions. [2023-11-28 20:20:51,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-28 20:20:51,049 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:20:51,049 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:20:51,059 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_095c9576-c743-4299-ac79-4195ff03091a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-28 20:20:51,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_095c9576-c743-4299-ac79-4195ff03091a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-28 20:20:51,257 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:20:51,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:20:51,257 INFO L85 PathProgramCache]: Analyzing trace with hash 262724210, now seen corresponding path program 1 times [2023-11-28 20:20:51,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:20:51,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136384603] [2023-11-28 20:20:51,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:20:51,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:20:51,359 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:20:51,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [555785654] [2023-11-28 20:20:51,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:20:51,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:20:51,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_095c9576-c743-4299-ac79-4195ff03091a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:20:51,361 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_095c9576-c743-4299-ac79-4195ff03091a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:20:51,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_095c9576-c743-4299-ac79-4195ff03091a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-28 20:20:51,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:20:51,838 INFO L262 TraceCheckSpWp]: Trace formula consists of 2014 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-28 20:20:51,842 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:20:51,877 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-28 20:20:51,877 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:20:51,983 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-28 20:20:51,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:20:51,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136384603] [2023-11-28 20:20:51,984 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:20:51,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555785654] [2023-11-28 20:20:51,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555785654] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:20:51,984 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 20:20:51,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-28 20:20:51,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609055182] [2023-11-28 20:20:51,985 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 20:20:51,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-28 20:20:51,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:20:51,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-28 20:20:51,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-28 20:20:51,987 INFO L87 Difference]: Start difference. First operand 118 states and 151 transitions. Second operand has 8 states, 6 states have (on average 5.333333333333333) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2023-11-28 20:20:52,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:20:52,541 INFO L93 Difference]: Finished difference Result 227 states and 289 transitions. [2023-11-28 20:20:52,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-28 20:20:52,542 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 5.333333333333333) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 56 [2023-11-28 20:20:52,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:20:52,544 INFO L225 Difference]: With dead ends: 227 [2023-11-28 20:20:52,545 INFO L226 Difference]: Without dead ends: 121 [2023-11-28 20:20:52,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2023-11-28 20:20:52,547 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 1 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-28 20:20:52,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 406 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-28 20:20:52,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-11-28 20:20:52,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2023-11-28 20:20:52,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 72 states have (on average 1.2222222222222223) internal successors, (88), 74 states have internal predecessors, (88), 34 states have call successors, (34), 14 states have call predecessors, (34), 14 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2023-11-28 20:20:52,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 154 transitions. [2023-11-28 20:20:52,561 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 154 transitions. Word has length 56 [2023-11-28 20:20:52,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:20:52,562 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 154 transitions. [2023-11-28 20:20:52,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 5.333333333333333) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2023-11-28 20:20:52,562 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 154 transitions. [2023-11-28 20:20:52,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-28 20:20:52,564 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:20:52,565 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:20:52,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_095c9576-c743-4299-ac79-4195ff03091a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-28 20:20:52,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_095c9576-c743-4299-ac79-4195ff03091a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:20:52,769 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:20:52,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:20:52,769 INFO L85 PathProgramCache]: Analyzing trace with hash 501978096, now seen corresponding path program 2 times [2023-11-28 20:20:52,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:20:52,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439946704] [2023-11-28 20:20:52,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:20:52,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:20:52,864 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:20:52,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [291788218] [2023-11-28 20:20:52,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 20:20:52,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:20:52,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_095c9576-c743-4299-ac79-4195ff03091a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:20:52,866 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_095c9576-c743-4299-ac79-4195ff03091a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:20:52,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_095c9576-c743-4299-ac79-4195ff03091a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-28 20:20:53,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 20:20:53,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:20:53,865 INFO L262 TraceCheckSpWp]: Trace formula consists of 2071 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-28 20:20:53,869 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:20:53,912 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-28 20:20:53,912 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:20:54,099 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-28 20:20:54,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:20:54,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439946704] [2023-11-28 20:20:54,099 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:20:54,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291788218] [2023-11-28 20:20:54,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291788218] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:20:54,100 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 20:20:54,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-11-28 20:20:54,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6679788] [2023-11-28 20:20:54,100 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 20:20:54,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-28 20:20:54,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:20:54,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-28 20:20:54,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2023-11-28 20:20:54,102 INFO L87 Difference]: Start difference. First operand 121 states and 154 transitions. Second operand has 14 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 14 states have internal predecessors, (38), 2 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2023-11-28 20:20:55,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:20:55,116 INFO L93 Difference]: Finished difference Result 233 states and 298 transitions. [2023-11-28 20:20:55,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-28 20:20:55,117 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 14 states have internal predecessors, (38), 2 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 59 [2023-11-28 20:20:55,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:20:55,119 INFO L225 Difference]: With dead ends: 233 [2023-11-28 20:20:55,119 INFO L226 Difference]: Without dead ends: 127 [2023-11-28 20:20:55,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=131, Invalid=211, Unknown=0, NotChecked=0, Total=342 [2023-11-28 20:20:55,121 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 1 mSDsluCounter, 1220 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 1357 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-28 20:20:55,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 1357 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-28 20:20:55,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-11-28 20:20:55,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2023-11-28 20:20:55,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 78 states have (on average 1.205128205128205) internal successors, (94), 80 states have internal predecessors, (94), 34 states have call successors, (34), 14 states have call predecessors, (34), 14 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2023-11-28 20:20:55,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 160 transitions. [2023-11-28 20:20:55,132 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 160 transitions. Word has length 59 [2023-11-28 20:20:55,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:20:55,132 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 160 transitions. [2023-11-28 20:20:55,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 14 states have internal predecessors, (38), 2 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2023-11-28 20:20:55,133 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 160 transitions. [2023-11-28 20:20:55,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-28 20:20:55,134 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:20:55,134 INFO L195 NwaCegarLoop]: trace histogram [10, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:20:55,143 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_095c9576-c743-4299-ac79-4195ff03091a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-28 20:20:55,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_095c9576-c743-4299-ac79-4195ff03091a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:20:55,335 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:20:55,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:20:55,335 INFO L85 PathProgramCache]: Analyzing trace with hash -476011344, now seen corresponding path program 3 times [2023-11-28 20:20:55,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:20:55,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883641464] [2023-11-28 20:20:55,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:20:55,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:20:55,430 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:20:55,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2081297111] [2023-11-28 20:20:55,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-28 20:20:55,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:20:55,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_095c9576-c743-4299-ac79-4195ff03091a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:20:55,432 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_095c9576-c743-4299-ac79-4195ff03091a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:20:55,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_095c9576-c743-4299-ac79-4195ff03091a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-28 20:21:01,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-28 20:21:01,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:21:01,442 INFO L262 TraceCheckSpWp]: Trace formula consists of 2185 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-28 20:21:01,447 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:21:01,645 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 13 treesize of output 9 [2023-11-28 20:21:01,706 INFO L349 Elim1Store]: treesize reduction 25, result has 26.5 percent of original size [2023-11-28 20:21:01,707 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2023-11-28 20:21:01,977 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 11 [2023-11-28 20:21:02,004 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-28 20:21:02,005 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:21:02,235 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2023-11-28 20:21:02,371 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2023-11-28 20:21:02,375 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 44 [2023-11-28 20:21:02,703 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-28 20:21:02,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:21:02,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883641464] [2023-11-28 20:21:02,703 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:21:02,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081297111] [2023-11-28 20:21:02,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081297111] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:21:02,704 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 20:21:02,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15] total 31 [2023-11-28 20:21:02,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861020860] [2023-11-28 20:21:02,704 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 20:21:02,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-28 20:21:02,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:21:02,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-28 20:21:02,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=851, Unknown=0, NotChecked=0, Total=930 [2023-11-28 20:21:02,707 INFO L87 Difference]: Start difference. First operand 127 states and 160 transitions. Second operand has 31 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 31 states have internal predecessors, (60), 7 states have call successors, (19), 3 states have call predecessors, (19), 4 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2023-11-28 20:21:05,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:21:05,369 INFO L93 Difference]: Finished difference Result 245 states and 306 transitions. [2023-11-28 20:21:05,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-28 20:21:05,369 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 31 states have internal predecessors, (60), 7 states have call successors, (19), 3 states have call predecessors, (19), 4 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) Word has length 65 [2023-11-28 20:21:05,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:21:05,371 INFO L225 Difference]: With dead ends: 245 [2023-11-28 20:21:05,371 INFO L226 Difference]: Without dead ends: 191 [2023-11-28 20:21:05,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=114, Invalid=1146, Unknown=0, NotChecked=0, Total=1260 [2023-11-28 20:21:05,373 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 146 mSDsluCounter, 2067 mSDsCounter, 0 mSdLazyCounter, 1163 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 2191 SdHoareTripleChecker+Invalid, 1218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-11-28 20:21:05,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 2191 Invalid, 1218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1163 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-11-28 20:21:05,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2023-11-28 20:21:05,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 187. [2023-11-28 20:21:05,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 116 states have (on average 1.2155172413793103) internal successors, (141), 120 states have internal predecessors, (141), 48 states have call successors, (48), 22 states have call predecessors, (48), 22 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2023-11-28 20:21:05,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 233 transitions. [2023-11-28 20:21:05,398 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 233 transitions. Word has length 65 [2023-11-28 20:21:05,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:21:05,399 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 233 transitions. [2023-11-28 20:21:05,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 31 states have internal predecessors, (60), 7 states have call successors, (19), 3 states have call predecessors, (19), 4 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2023-11-28 20:21:05,399 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 233 transitions. [2023-11-28 20:21:05,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-28 20:21:05,400 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:21:05,400 INFO L195 NwaCegarLoop]: trace histogram [10, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:21:05,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_095c9576-c743-4299-ac79-4195ff03091a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-28 20:21:05,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_095c9576-c743-4299-ac79-4195ff03091a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:21:05,601 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:21:05,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:21:05,601 INFO L85 PathProgramCache]: Analyzing trace with hash -477858386, now seen corresponding path program 1 times [2023-11-28 20:21:05,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:21:05,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714010600] [2023-11-28 20:21:05,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:05,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:21:05,693 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:21:05,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [115764405] [2023-11-28 20:21:05,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:05,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:21:05,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_095c9576-c743-4299-ac79-4195ff03091a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:21:05,695 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_095c9576-c743-4299-ac79-4195ff03091a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:21:05,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_095c9576-c743-4299-ac79-4195ff03091a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-28 20:21:06,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:06,176 INFO L262 TraceCheckSpWp]: Trace formula consists of 2180 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-28 20:21:06,179 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:21:06,232 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2023-11-28 20:21:06,232 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:21:06,296 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2023-11-28 20:21:06,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:21:06,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714010600] [2023-11-28 20:21:06,297 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:21:06,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115764405] [2023-11-28 20:21:06,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115764405] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-28 20:21:06,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-28 20:21:06,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2023-11-28 20:21:06,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956852719] [2023-11-28 20:21:06,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:21:06,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-28 20:21:06,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:21:06,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-28 20:21:06,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2023-11-28 20:21:06,299 INFO L87 Difference]: Start difference. First operand 187 states and 233 transitions. Second operand has 5 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2023-11-28 20:21:06,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:21:06,507 INFO L93 Difference]: Finished difference Result 199 states and 245 transitions. [2023-11-28 20:21:06,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-28 20:21:06,508 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) Word has length 65 [2023-11-28 20:21:06,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:21:06,509 INFO L225 Difference]: With dead ends: 199 [2023-11-28 20:21:06,509 INFO L226 Difference]: Without dead ends: 197 [2023-11-28 20:21:06,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-11-28 20:21:06,510 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 6 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-28 20:21:06,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 525 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-28 20:21:06,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2023-11-28 20:21:06,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 196. [2023-11-28 20:21:06,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 122 states have (on average 1.2049180327868851) internal successors, (147), 127 states have internal predecessors, (147), 49 states have call successors, (49), 24 states have call predecessors, (49), 24 states have return successors, (45), 44 states have call predecessors, (45), 45 states have call successors, (45) [2023-11-28 20:21:06,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 241 transitions. [2023-11-28 20:21:06,528 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 241 transitions. Word has length 65 [2023-11-28 20:21:06,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:21:06,528 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 241 transitions. [2023-11-28 20:21:06,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2023-11-28 20:21:06,529 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 241 transitions. [2023-11-28 20:21:06,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-28 20:21:06,530 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:21:06,530 INFO L195 NwaCegarLoop]: trace histogram [10, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:21:06,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_095c9576-c743-4299-ac79-4195ff03091a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-28 20:21:06,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_095c9576-c743-4299-ac79-4195ff03091a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:21:06,733 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:21:06,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:21:06,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1965813320, now seen corresponding path program 1 times [2023-11-28 20:21:06,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:21:06,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156631681] [2023-11-28 20:21:06,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:06,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:21:06,832 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:21:06,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [473505335] [2023-11-28 20:21:06,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:06,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:21:06,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_095c9576-c743-4299-ac79-4195ff03091a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:21:06,833 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_095c9576-c743-4299-ac79-4195ff03091a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:21:06,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_095c9576-c743-4299-ac79-4195ff03091a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-28 20:21:07,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:07,322 INFO L262 TraceCheckSpWp]: Trace formula consists of 2168 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-28 20:21:07,324 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:21:07,342 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2023-11-28 20:21:07,342 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:21:07,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:21:07,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156631681] [2023-11-28 20:21:07,342 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:21:07,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473505335] [2023-11-28 20:21:07,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473505335] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:21:07,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:21:07,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-28 20:21:07,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940786878] [2023-11-28 20:21:07,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:21:07,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-28 20:21:07,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:21:07,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-28 20:21:07,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-28 20:21:07,345 INFO L87 Difference]: Start difference. First operand 196 states and 241 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2023-11-28 20:21:07,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:21:07,530 INFO L93 Difference]: Finished difference Result 254 states and 314 transitions. [2023-11-28 20:21:07,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-28 20:21:07,531 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 68 [2023-11-28 20:21:07,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:21:07,533 INFO L225 Difference]: With dead ends: 254 [2023-11-28 20:21:07,534 INFO L226 Difference]: Without dead ends: 202 [2023-11-28 20:21:07,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-28 20:21:07,535 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 1 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-28 20:21:07,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 538 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-28 20:21:07,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2023-11-28 20:21:07,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 200. [2023-11-28 20:21:07,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 125 states have (on average 1.2) internal successors, (150), 130 states have internal predecessors, (150), 49 states have call successors, (49), 24 states have call predecessors, (49), 25 states have return successors, (47), 45 states have call predecessors, (47), 45 states have call successors, (47) [2023-11-28 20:21:07,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 246 transitions. [2023-11-28 20:21:07,551 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 246 transitions. Word has length 68 [2023-11-28 20:21:07,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:21:07,551 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 246 transitions. [2023-11-28 20:21:07,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2023-11-28 20:21:07,552 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 246 transitions. [2023-11-28 20:21:07,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-11-28 20:21:07,552 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:21:07,553 INFO L195 NwaCegarLoop]: trace histogram [10, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:21:07,561 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_095c9576-c743-4299-ac79-4195ff03091a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-28 20:21:07,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_095c9576-c743-4299-ac79-4195ff03091a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:21:07,753 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:21:07,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:21:07,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1525194587, now seen corresponding path program 1 times [2023-11-28 20:21:07,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:21:07,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915607803] [2023-11-28 20:21:07,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:07,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:21:07,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:08,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-28 20:21:08,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:08,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-28 20:21:08,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:08,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-28 20:21:08,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:08,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-28 20:21:08,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:08,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-28 20:21:08,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:08,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-11-28 20:21:08,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:08,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-28 20:21:08,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:08,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-11-28 20:21:08,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:08,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-28 20:21:08,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:08,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-28 20:21:08,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:08,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2023-11-28 20:21:08,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:08,472 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2023-11-28 20:21:08,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:21:08,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915607803] [2023-11-28 20:21:08,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915607803] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:21:08,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:21:08,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-28 20:21:08,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325468272] [2023-11-28 20:21:08,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:21:08,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-28 20:21:08,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:21:08,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-28 20:21:08,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-11-28 20:21:08,474 INFO L87 Difference]: Start difference. First operand 200 states and 246 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (12), 6 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2023-11-28 20:21:09,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:21:09,727 INFO L93 Difference]: Finished difference Result 248 states and 307 transitions. [2023-11-28 20:21:09,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-28 20:21:09,728 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (12), 6 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) Word has length 72 [2023-11-28 20:21:09,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:21:09,731 INFO L225 Difference]: With dead ends: 248 [2023-11-28 20:21:09,731 INFO L226 Difference]: Without dead ends: 246 [2023-11-28 20:21:09,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2023-11-28 20:21:09,732 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 225 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-28 20:21:09,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 314 Invalid, 816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 637 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-28 20:21:09,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2023-11-28 20:21:09,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 207. [2023-11-28 20:21:09,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 129 states have (on average 1.193798449612403) internal successors, (154), 135 states have internal predecessors, (154), 50 states have call successors, (50), 25 states have call predecessors, (50), 27 states have return successors, (50), 46 states have call predecessors, (50), 46 states have call successors, (50) [2023-11-28 20:21:09,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 254 transitions. [2023-11-28 20:21:09,767 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 254 transitions. Word has length 72 [2023-11-28 20:21:09,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:21:09,767 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 254 transitions. [2023-11-28 20:21:09,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (12), 6 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2023-11-28 20:21:09,768 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 254 transitions. [2023-11-28 20:21:09,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-11-28 20:21:09,769 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:21:09,769 INFO L195 NwaCegarLoop]: trace histogram [10, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:21:09,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-28 20:21:09,769 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:21:09,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:21:09,770 INFO L85 PathProgramCache]: Analyzing trace with hash 42867612, now seen corresponding path program 1 times [2023-11-28 20:21:09,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:21:09,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131877472] [2023-11-28 20:21:09,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:09,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:21:09,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:10,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-28 20:21:10,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:10,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-28 20:21:10,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:10,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-28 20:21:10,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:10,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-28 20:21:10,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:10,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-28 20:21:10,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:10,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-11-28 20:21:10,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:10,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-28 20:21:10,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:11,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-11-28 20:21:11,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:11,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-28 20:21:11,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:11,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-28 20:21:11,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:11,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2023-11-28 20:21:11,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:11,615 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-28 20:21:11,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:21:11,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131877472] [2023-11-28 20:21:11,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131877472] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:21:11,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765343646] [2023-11-28 20:21:11,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:11,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:21:11,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_095c9576-c743-4299-ac79-4195ff03091a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:21:11,617 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_095c9576-c743-4299-ac79-4195ff03091a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:21:11,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_095c9576-c743-4299-ac79-4195ff03091a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-28 20:21:12,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:12,421 INFO L262 TraceCheckSpWp]: Trace formula consists of 2170 conjuncts, 94 conjunts are in the unsatisfiable core [2023-11-28 20:21:12,428 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:21:12,499 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 11 treesize of output 7 [2023-11-28 20:21:12,549 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-11-28 20:21:12,610 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:21:12,611 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2023-11-28 20:21:12,685 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:21:12,686 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2023-11-28 20:21:12,767 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:21:12,768 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 56 [2023-11-28 20:21:12,871 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:21:12,871 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 68 [2023-11-28 20:21:12,997 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:21:12,998 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 80 [2023-11-28 20:21:13,115 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:21:13,116 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 75 treesize of output 92 [2023-11-28 20:21:13,254 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:21:13,254 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 84 treesize of output 104 [2023-11-28 20:21:13,406 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:21:13,407 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 99 treesize of output 107 [2023-11-28 20:21:15,020 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-28 20:21:15,020 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:21:20,638 WARN L293 SmtUtils]: Spent 5.11s on a formula simplification. DAG size of input: 140 DAG size of output: 137 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-11-28 20:21:22,440 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 66 [2023-11-28 20:21:22,447 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16374 treesize of output 16372 [2023-11-28 20:21:22,607 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-28 20:21:22,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765343646] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:21:22,607 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:21:22,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20, 17] total 50 [2023-11-28 20:21:22,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425466493] [2023-11-28 20:21:22,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:21:22,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-11-28 20:21:22,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:21:22,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-11-28 20:21:22,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=2198, Unknown=0, NotChecked=0, Total=2450 [2023-11-28 20:21:22,611 INFO L87 Difference]: Start difference. First operand 207 states and 254 transitions. Second operand has 50 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 46 states have internal predecessors, (91), 7 states have call successors, (28), 7 states have call predecessors, (28), 7 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2023-11-28 20:21:37,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:21:37,270 INFO L93 Difference]: Finished difference Result 508 states and 632 transitions. [2023-11-28 20:21:37,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-28 20:21:37,271 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 46 states have internal predecessors, (91), 7 states have call successors, (28), 7 states have call predecessors, (28), 7 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) Word has length 72 [2023-11-28 20:21:37,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:21:37,273 INFO L225 Difference]: With dead ends: 508 [2023-11-28 20:21:37,273 INFO L226 Difference]: Without dead ends: 329 [2023-11-28 20:21:37,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 136 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1368 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=678, Invalid=5802, Unknown=0, NotChecked=0, Total=6480 [2023-11-28 20:21:37,278 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 349 mSDsluCounter, 692 mSDsCounter, 0 mSdLazyCounter, 3828 mSolverCounterSat, 205 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 741 SdHoareTripleChecker+Invalid, 4037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 3828 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.3s IncrementalHoareTripleChecker+Time [2023-11-28 20:21:37,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [357 Valid, 741 Invalid, 4037 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 3828 Invalid, 4 Unknown, 0 Unchecked, 11.3s Time] [2023-11-28 20:21:37,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2023-11-28 20:21:37,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 259. [2023-11-28 20:21:37,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 163 states have (on average 1.2208588957055215) internal successors, (199), 172 states have internal predecessors, (199), 61 states have call successors, (61), 31 states have call predecessors, (61), 34 states have return successors, (60), 55 states have call predecessors, (60), 55 states have call successors, (60) [2023-11-28 20:21:37,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 320 transitions. [2023-11-28 20:21:37,321 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 320 transitions. Word has length 72 [2023-11-28 20:21:37,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:21:37,322 INFO L495 AbstractCegarLoop]: Abstraction has 259 states and 320 transitions. [2023-11-28 20:21:37,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 46 states have internal predecessors, (91), 7 states have call successors, (28), 7 states have call predecessors, (28), 7 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2023-11-28 20:21:37,322 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 320 transitions. [2023-11-28 20:21:37,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-11-28 20:21:37,324 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:21:37,324 INFO L195 NwaCegarLoop]: trace histogram [11, 5, 5, 5, 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] [2023-11-28 20:21:37,335 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_095c9576-c743-4299-ac79-4195ff03091a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-28 20:21:37,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_095c9576-c743-4299-ac79-4195ff03091a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:21:37,536 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:21:37,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:21:37,537 INFO L85 PathProgramCache]: Analyzing trace with hash 2137768095, now seen corresponding path program 1 times [2023-11-28 20:21:37,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:21:37,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996670497] [2023-11-28 20:21:37,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:37,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:21:37,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:38,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-28 20:21:38,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:38,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-28 20:21:38,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:38,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-28 20:21:38,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:38,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-28 20:21:38,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:38,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-28 20:21:38,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:38,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-11-28 20:21:38,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:38,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-28 20:21:38,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:39,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-28 20:21:39,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:39,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-28 20:21:39,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:39,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-28 20:21:39,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:39,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-28 20:21:39,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:39,169 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-11-28 20:21:39,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:21:39,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996670497] [2023-11-28 20:21:39,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996670497] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:21:39,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375093300] [2023-11-28 20:21:39,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:39,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:21:39,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_095c9576-c743-4299-ac79-4195ff03091a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:21:39,171 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_095c9576-c743-4299-ac79-4195ff03091a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:21:39,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_095c9576-c743-4299-ac79-4195ff03091a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-28 20:21:39,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:39,909 INFO L262 TraceCheckSpWp]: Trace formula consists of 2196 conjuncts, 76 conjunts are in the unsatisfiable core [2023-11-28 20:21:39,915 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:21:39,923 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 11 treesize of output 7 [2023-11-28 20:21:39,957 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-11-28 20:21:40,018 INFO L349 Elim1Store]: treesize reduction 46, result has 27.0 percent of original size [2023-11-28 20:21:40,018 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 23 [2023-11-28 20:21:40,087 INFO L349 Elim1Store]: treesize reduction 46, result has 27.0 percent of original size [2023-11-28 20:21:40,087 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 23 [2023-11-28 20:21:40,151 INFO L349 Elim1Store]: treesize reduction 46, result has 27.0 percent of original size [2023-11-28 20:21:40,151 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 23 [2023-11-28 20:21:40,217 INFO L349 Elim1Store]: treesize reduction 46, result has 27.0 percent of original size [2023-11-28 20:21:40,217 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 23 [2023-11-28 20:21:40,291 INFO L349 Elim1Store]: treesize reduction 46, result has 27.0 percent of original size [2023-11-28 20:21:40,292 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 23 [2023-11-28 20:21:40,365 INFO L349 Elim1Store]: treesize reduction 46, result has 27.0 percent of original size [2023-11-28 20:21:40,366 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 23 [2023-11-28 20:21:40,429 INFO L349 Elim1Store]: treesize reduction 34, result has 33.3 percent of original size [2023-11-28 20:21:40,429 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2023-11-28 20:21:40,545 INFO L349 Elim1Store]: treesize reduction 68, result has 27.7 percent of original size [2023-11-28 20:21:40,545 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 44 [2023-11-28 20:21:40,711 INFO L349 Elim1Store]: treesize reduction 134, result has 20.7 percent of original size [2023-11-28 20:21:40,711 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 54 treesize of output 47 [2023-11-28 20:22:26,324 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 36 proven. 32 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-28 20:22:26,324 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:26:32,351 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 65