./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/aws-c-common/aws_priority_queue_init_dynamic_harness.i --full-output --preprocessor.use.memory.slicer true --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version abd6749d Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/aws-c-common/aws_priority_queue_init_dynamic_harness.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 fd704c0997d5526a33ae946f9f6b6d8e05b412ad44e87cb653981b428eeb987a --preprocessor.use.memory.slicer true --- Real Ultimate output --- This is Ultimate 0.2.3-?-abd6749-m [2023-11-23 07:34:57,066 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 07:34:57,132 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2023-11-23 07:34:57,160 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 07:34:57,161 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 07:34:57,189 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 07:34:57,190 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 07:34:57,190 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 07:34:57,191 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-23 07:34:57,194 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-23 07:34:57,195 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 07:34:57,195 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 07:34:57,195 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 07:34:57,196 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 07:34:57,197 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 07:34:57,197 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 07:34:57,197 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 07:34:57,197 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 07:34:57,197 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 07:34:57,198 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 07:34:57,198 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 07:34:57,198 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 07:34:57,198 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 07:34:57,199 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 07:34:57,199 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 07:34:57,199 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 07:34:57,200 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 07:34:57,200 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 07:34:57,200 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 07:34:57,200 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 07:34:57,201 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 07:34:57,201 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 07:34:57,202 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 07:34:57,202 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 07:34:57,202 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 07:34:57,202 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 07:34:57,203 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 07:34:57,203 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 07:34:57,203 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 07:34:57,204 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fd704c0997d5526a33ae946f9f6b6d8e05b412ad44e87cb653981b428eeb987a Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.preprocessor: Use memory slicer -> true [2023-11-23 07:34:57,433 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 07:34:57,461 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 07:34:57,463 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 07:34:57,464 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 07:34:57,469 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 07:34:57,470 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/aws-c-common/aws_priority_queue_init_dynamic_harness.i [2023-11-23 07:34:58,635 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 07:34:59,026 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 07:34:59,026 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/aws-c-common/aws_priority_queue_init_dynamic_harness.i [2023-11-23 07:34:59,064 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a87d23987/b486adfdfb8f4a88bd0a16bd52f802bc/FLAG5366144ce [2023-11-23 07:34:59,076 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a87d23987/b486adfdfb8f4a88bd0a16bd52f802bc [2023-11-23 07:34:59,078 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 07:34:59,080 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 07:34:59,082 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 07:34:59,082 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 07:34:59,089 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 07:34:59,089 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 07:34:59" (1/1) ... [2023-11-23 07:34:59,090 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@436bdcc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:34:59, skipping insertion in model container [2023-11-23 07:34:59,090 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 07:34:59" (1/1) ... [2023-11-23 07:34:59,180 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 07:34:59,396 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/aws-c-common/aws_priority_queue_init_dynamic_harness.i[4505,4518] [2023-11-23 07:34:59,405 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/aws-c-common/aws_priority_queue_init_dynamic_harness.i[4565,4578] [2023-11-23 07:35:00,121 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:35:00,121 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:35:00,122 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:35:00,122 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:35:00,123 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:35:00,151 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:35:00,151 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:35:00,152 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:35:00,152 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:35:00,397 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-23 07:35:00,398 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-23 07:35:00,399 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-23 07:35:00,404 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-23 07:35:00,405 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-23 07:35:00,406 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-23 07:35:00,407 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-23 07:35:00,408 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-23 07:35:00,408 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-23 07:35:00,410 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-23 07:35:00,539 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:35:00,539 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:35:00,587 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 07:35:00,625 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 07:35:00,669 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/aws-c-common/aws_priority_queue_init_dynamic_harness.i[4505,4518] [2023-11-23 07:35:00,669 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/aws-c-common/aws_priority_queue_init_dynamic_harness.i[4565,4578] [2023-11-23 07:35:00,705 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:35:00,706 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:35:00,706 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:35:00,708 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:35:00,708 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:35:00,714 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:35:00,715 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:35:00,716 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:35:00,717 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:35:00,787 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-23 07:35:00,787 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-23 07:35:00,788 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-23 07:35:00,789 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-23 07:35:00,789 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-23 07:35:00,790 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-23 07:35:00,790 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-23 07:35:00,790 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-23 07:35:00,791 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-23 07:35:00,791 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-23 07:35:00,840 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:35:00,841 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:35:00,845 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : : "r"(pBuf) : "memory"); [7703-7714] [2023-11-23 07:35:00,869 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 07:35:01,053 WARN L675 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 07:35:01,054 WARN L675 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 07:35:01,054 WARN L675 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 07:35:01,054 WARN L675 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 07:35:01,054 WARN L675 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 07:35:01,054 WARN L675 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 07:35:01,054 WARN L675 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 07:35:01,055 WARN L675 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 07:35:01,055 WARN L675 CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 07:35:01,055 WARN L675 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 07:35:01,055 WARN L675 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 07:35:01,056 WARN L675 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 07:35:01,056 WARN L675 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 07:35:01,056 WARN L675 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 07:35:01,056 WARN L675 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 07:35:01,063 INFO L206 MainTranslator]: Completed translation [2023-11-23 07:35:01,064 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:35:01 WrapperNode [2023-11-23 07:35:01,064 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 07:35:01,065 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 07:35:01,065 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 07:35:01,065 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 07:35:01,071 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:35:01" (1/1) ... [2023-11-23 07:35:01,157 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:35:01" (1/1) ... [2023-11-23 07:35:01,224 INFO L138 Inliner]: procedures = 688, calls = 1515, calls flagged for inlining = 53, calls inlined = 9, statements flattened = 734 [2023-11-23 07:35:01,225 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 07:35:01,225 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 07:35:01,226 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 07:35:01,226 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 07:35:01,236 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:35:01" (1/1) ... [2023-11-23 07:35:01,236 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:35:01" (1/1) ... [2023-11-23 07:35:01,242 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:35:01" (1/1) ... [2023-11-23 07:35:01,336 INFO L188 MemorySlicer]: Split 288 memory accesses to 6 slices as follows [2, 236, 35, 7, 5, 3]. 82 percent of accesses are in the largest equivalence class. The 247 initializations are split as follows [2, 236, 0, 1, 5, 3]. The 7 writes are split as follows [0, 0, 6, 1, 0, 0]. [2023-11-23 07:35:01,336 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:35:01" (1/1) ... [2023-11-23 07:35:01,337 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:35:01" (1/1) ... [2023-11-23 07:35:01,379 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:35:01" (1/1) ... [2023-11-23 07:35:01,387 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:35:01" (1/1) ... [2023-11-23 07:35:01,404 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:35:01" (1/1) ... [2023-11-23 07:35:01,409 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:35:01" (1/1) ... [2023-11-23 07:35:01,446 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 07:35:01,450 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 07:35:01,452 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 07:35:01,452 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 07:35:01,453 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:35:01" (1/1) ... [2023-11-23 07:35:01,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 07:35:01,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:35:01,504 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 07:35:01,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 07:35:01,562 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2023-11-23 07:35:01,562 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2023-11-23 07:35:01,563 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 07:35:01,563 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_valid [2023-11-23 07:35:01,564 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_valid [2023-11-23 07:35:01,564 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2023-11-23 07:35:01,565 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2023-11-23 07:35:01,565 INFO L130 BoogieDeclarations]: Found specification of procedure aws_allocator_is_valid [2023-11-23 07:35:01,565 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_allocator_is_valid [2023-11-23 07:35:01,565 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-23 07:35:01,565 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-23 07:35:01,565 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-23 07:35:01,565 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-23 07:35:01,565 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-23 07:35:01,566 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2023-11-23 07:35:01,566 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2023-11-23 07:35:01,567 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2023-11-23 07:35:01,567 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-23 07:35:01,567 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-23 07:35:01,567 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 07:35:01,567 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 07:35:01,567 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-23 07:35:01,568 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-23 07:35:01,568 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-23 07:35:01,568 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2023-11-23 07:35:01,568 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#4 [2023-11-23 07:35:01,568 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#5 [2023-11-23 07:35:01,568 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 07:35:01,568 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 07:35:01,569 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2023-11-23 07:35:01,569 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2023-11-23 07:35:01,569 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2023-11-23 07:35:01,569 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2023-11-23 07:35:01,570 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_malloc [2023-11-23 07:35:01,570 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_malloc [2023-11-23 07:35:01,570 INFO L130 BoogieDeclarations]: Found specification of procedure aws_priority_queue_is_valid [2023-11-23 07:35:01,570 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_priority_queue_is_valid [2023-11-23 07:35:01,570 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-23 07:35:01,571 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-23 07:35:01,571 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 07:35:01,571 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-23 07:35:01,572 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-23 07:35:01,572 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-23 07:35:01,572 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2023-11-23 07:35:01,572 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#4 [2023-11-23 07:35:01,572 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#5 [2023-11-23 07:35:01,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2023-11-23 07:35:01,573 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2023-11-23 07:35:01,573 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2023-11-23 07:35:01,573 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2023-11-23 07:35:01,573 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#4 [2023-11-23 07:35:01,573 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#5 [2023-11-23 07:35:01,574 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2023-11-23 07:35:01,574 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2023-11-23 07:35:01,574 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2023-11-23 07:35:01,574 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2023-11-23 07:35:01,574 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-23 07:35:01,574 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-23 07:35:01,574 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-23 07:35:01,574 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-23 07:35:01,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-23 07:35:01,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2023-11-23 07:35:01,575 INFO L130 BoogieDeclarations]: Found specification of procedure memset_impl [2023-11-23 07:35:01,575 INFO L138 BoogieDeclarations]: Found implementation of procedure memset_impl [2023-11-23 07:35:01,575 INFO L130 BoogieDeclarations]: Found specification of procedure my_memset [2023-11-23 07:35:01,575 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memset [2023-11-23 07:35:01,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-23 07:35:01,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-23 07:35:01,576 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-23 07:35:01,576 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-23 07:35:01,576 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-23 07:35:01,576 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-11-23 07:35:01,880 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 07:35:01,884 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 07:35:02,520 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 07:35:02,628 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 07:35:02,628 INFO L309 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-23 07:35:02,629 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 07:35:02 BoogieIcfgContainer [2023-11-23 07:35:02,629 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 07:35:02,631 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 07:35:02,631 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 07:35:02,634 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 07:35:02,634 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 07:34:59" (1/3) ... [2023-11-23 07:35:02,635 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1861254b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 07:35:02, skipping insertion in model container [2023-11-23 07:35:02,635 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:35:01" (2/3) ... [2023-11-23 07:35:02,636 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1861254b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 07:35:02, skipping insertion in model container [2023-11-23 07:35:02,636 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 07:35:02" (3/3) ... [2023-11-23 07:35:02,637 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_priority_queue_init_dynamic_harness.i [2023-11-23 07:35:02,651 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 07:35:02,651 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 07:35:02,700 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 07:35:02,708 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;@1c829391, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 07:35:02,709 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 07:35:02,713 INFO L276 IsEmpty]: Start isEmpty. Operand has 179 states, 111 states have (on average 1.3063063063063063) internal successors, (145), 111 states have internal predecessors, (145), 53 states have call successors, (53), 15 states have call predecessors, (53), 15 states have return successors, (53), 53 states have call predecessors, (53), 53 states have call successors, (53) [2023-11-23 07:35:02,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-11-23 07:35:02,724 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:35:02,725 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 07:35:02,725 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:35:02,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:35:02,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1784102456, now seen corresponding path program 1 times [2023-11-23 07:35:02,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:35:02,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929644462] [2023-11-23 07:35:02,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:35:02,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:35:03,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:35:03,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:35:03,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929644462] [2023-11-23 07:35:03,091 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-23 07:35:03,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733267874] [2023-11-23 07:35:03,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:35:03,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:35:03,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:35:03,109 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 07:35:03,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 07:35:03,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:35:03,650 INFO L262 TraceCheckSpWp]: Trace formula consists of 2272 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-23 07:35:03,660 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:35:03,709 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2023-11-23 07:35:03,709 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 07:35:03,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733267874] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 07:35:03,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 07:35:03,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 07:35:03,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828200063] [2023-11-23 07:35:03,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 07:35:03,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-23 07:35:03,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:35:03,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-23 07:35:03,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 07:35:03,736 INFO L87 Difference]: Start difference. First operand has 179 states, 111 states have (on average 1.3063063063063063) internal successors, (145), 111 states have internal predecessors, (145), 53 states have call successors, (53), 15 states have call predecessors, (53), 15 states have return successors, (53), 53 states have call predecessors, (53), 53 states have call successors, (53) Second operand has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2023-11-23 07:35:03,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:35:03,844 INFO L93 Difference]: Finished difference Result 354 states and 536 transitions. [2023-11-23 07:35:03,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-23 07:35:03,846 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 92 [2023-11-23 07:35:03,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:35:03,854 INFO L225 Difference]: With dead ends: 354 [2023-11-23 07:35:03,854 INFO L226 Difference]: Without dead ends: 175 [2023-11-23 07:35:03,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 07:35:03,871 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 07:35:03,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 227 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 07:35:03,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2023-11-23 07:35:03,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2023-11-23 07:35:03,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 106 states have (on average 1.2641509433962264) internal successors, (134), 108 states have internal predecessors, (134), 53 states have call successors, (53), 15 states have call predecessors, (53), 15 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2023-11-23 07:35:03,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 238 transitions. [2023-11-23 07:35:03,937 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 238 transitions. Word has length 92 [2023-11-23 07:35:03,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:35:03,941 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 238 transitions. [2023-11-23 07:35:03,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2023-11-23 07:35:03,941 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 238 transitions. [2023-11-23 07:35:03,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-11-23 07:35:03,944 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:35:03,944 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 07:35:03,963 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-23 07:35:04,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-23 07:35:04,166 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:35:04,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:35:04,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1792221481, now seen corresponding path program 1 times [2023-11-23 07:35:04,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:35:04,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609559687] [2023-11-23 07:35:04,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:35:04,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:35:04,251 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:35:04,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [365338521] [2023-11-23 07:35:04,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:35:04,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:35:04,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:35:04,253 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 07:35:04,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 07:35:04,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:35:04,718 INFO L262 TraceCheckSpWp]: Trace formula consists of 2582 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-23 07:35:04,723 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:35:04,807 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2023-11-23 07:35:04,808 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 07:35:04,911 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2023-11-23 07:35:04,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:35:04,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609559687] [2023-11-23 07:35:04,911 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:35:04,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365338521] [2023-11-23 07:35:04,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365338521] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-23 07:35:04,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 07:35:04,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2023-11-23 07:35:04,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631106544] [2023-11-23 07:35:04,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 07:35:04,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 07:35:04,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:35:04,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 07:35:04,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2023-11-23 07:35:04,914 INFO L87 Difference]: Start difference. First operand 175 states and 238 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 1 states have call predecessors, (19), 1 states have call successors, (19) [2023-11-23 07:35:05,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:35:05,240 INFO L93 Difference]: Finished difference Result 183 states and 246 transitions. [2023-11-23 07:35:05,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 07:35:05,241 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 1 states have call predecessors, (19), 1 states have call successors, (19) Word has length 122 [2023-11-23 07:35:05,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:35:05,246 INFO L225 Difference]: With dead ends: 183 [2023-11-23 07:35:05,247 INFO L226 Difference]: Without dead ends: 181 [2023-11-23 07:35:05,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-11-23 07:35:05,248 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 6 mSDsluCounter, 641 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 861 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 07:35:05,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 861 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 07:35:05,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2023-11-23 07:35:05,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 180. [2023-11-23 07:35:05,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 109 states have (on average 1.2568807339449541) internal successors, (137), 112 states have internal predecessors, (137), 54 states have call successors, (54), 16 states have call predecessors, (54), 16 states have return successors, (52), 51 states have call predecessors, (52), 52 states have call successors, (52) [2023-11-23 07:35:05,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 243 transitions. [2023-11-23 07:35:05,272 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 243 transitions. Word has length 122 [2023-11-23 07:35:05,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:35:05,274 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 243 transitions. [2023-11-23 07:35:05,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 1 states have call predecessors, (19), 1 states have call successors, (19) [2023-11-23 07:35:05,275 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 243 transitions. [2023-11-23 07:35:05,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-11-23 07:35:05,282 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:35:05,282 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 07:35:05,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 07:35:05,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-23 07:35:05,500 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:35:05,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:35:05,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1790374439, now seen corresponding path program 1 times [2023-11-23 07:35:05,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:35:05,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627996681] [2023-11-23 07:35:05,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:35:05,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:35:05,557 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:35:05,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2039362426] [2023-11-23 07:35:05,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:35:05,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:35:05,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:35:05,560 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 07:35:05,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 07:35:06,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:35:06,063 INFO L262 TraceCheckSpWp]: Trace formula consists of 2587 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-23 07:35:06,069 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:35:06,101 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2023-11-23 07:35:06,102 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 07:35:06,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:35:06,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627996681] [2023-11-23 07:35:06,102 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:35:06,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039362426] [2023-11-23 07:35:06,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039362426] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 07:35:06,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 07:35:06,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 07:35:06,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773613052] [2023-11-23 07:35:06,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 07:35:06,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 07:35:06,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:35:06,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 07:35:06,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 07:35:06,105 INFO L87 Difference]: Start difference. First operand 180 states and 243 transitions. Second operand has 6 states, 5 states have (on average 9.4) internal successors, (47), 6 states have internal predecessors, (47), 4 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2023-11-23 07:35:06,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:35:06,428 INFO L93 Difference]: Finished difference Result 348 states and 465 transitions. [2023-11-23 07:35:06,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 07:35:06,429 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.4) internal successors, (47), 6 states have internal predecessors, (47), 4 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 122 [2023-11-23 07:35:06,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:35:06,432 INFO L225 Difference]: With dead ends: 348 [2023-11-23 07:35:06,432 INFO L226 Difference]: Without dead ends: 180 [2023-11-23 07:35:06,433 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-23 07:35:06,434 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 9 mSDsluCounter, 855 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 1072 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 07:35:06,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 1072 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 07:35:06,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2023-11-23 07:35:06,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2023-11-23 07:35:06,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 109 states have (on average 1.2477064220183487) internal successors, (136), 112 states have internal predecessors, (136), 54 states have call successors, (54), 16 states have call predecessors, (54), 16 states have return successors, (52), 51 states have call predecessors, (52), 52 states have call successors, (52) [2023-11-23 07:35:06,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 242 transitions. [2023-11-23 07:35:06,447 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 242 transitions. Word has length 122 [2023-11-23 07:35:06,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:35:06,448 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 242 transitions. [2023-11-23 07:35:06,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.4) internal successors, (47), 6 states have internal predecessors, (47), 4 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2023-11-23 07:35:06,449 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 242 transitions. [2023-11-23 07:35:06,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2023-11-23 07:35:06,450 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:35:06,450 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 07:35:06,464 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-23 07:35:06,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:35:06,653 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:35:06,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:35:06,653 INFO L85 PathProgramCache]: Analyzing trace with hash -215588471, now seen corresponding path program 1 times [2023-11-23 07:35:06,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:35:06,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471959266] [2023-11-23 07:35:06,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:35:06,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:35:06,743 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:35:06,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1717753279] [2023-11-23 07:35:06,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:35:06,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:35:06,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:35:06,745 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 07:35:06,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 07:35:07,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:35:07,223 INFO L262 TraceCheckSpWp]: Trace formula consists of 2603 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 07:35:07,226 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:35:07,249 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 141 proven. 0 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2023-11-23 07:35:07,251 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 07:35:07,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:35:07,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471959266] [2023-11-23 07:35:07,251 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:35:07,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717753279] [2023-11-23 07:35:07,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717753279] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 07:35:07,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 07:35:07,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 07:35:07,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146228640] [2023-11-23 07:35:07,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 07:35:07,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 07:35:07,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:35:07,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 07:35:07,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 07:35:07,253 INFO L87 Difference]: Start difference. First operand 180 states and 242 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2023-11-23 07:35:07,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:35:07,402 INFO L93 Difference]: Finished difference Result 345 states and 463 transitions. [2023-11-23 07:35:07,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 07:35:07,405 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 126 [2023-11-23 07:35:07,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:35:07,406 INFO L225 Difference]: With dead ends: 345 [2023-11-23 07:35:07,406 INFO L226 Difference]: Without dead ends: 181 [2023-11-23 07:35:07,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 07:35:07,407 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 0 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 07:35:07,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 440 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 07:35:07,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2023-11-23 07:35:07,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2023-11-23 07:35:07,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 110 states have (on average 1.2454545454545454) internal successors, (137), 113 states have internal predecessors, (137), 54 states have call successors, (54), 16 states have call predecessors, (54), 16 states have return successors, (52), 51 states have call predecessors, (52), 52 states have call successors, (52) [2023-11-23 07:35:07,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 243 transitions. [2023-11-23 07:35:07,416 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 243 transitions. Word has length 126 [2023-11-23 07:35:07,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:35:07,416 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 243 transitions. [2023-11-23 07:35:07,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2023-11-23 07:35:07,416 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 243 transitions. [2023-11-23 07:35:07,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-11-23 07:35:07,417 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:35:07,417 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 07:35:07,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 07:35:07,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:35:07,633 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:35:07,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:35:07,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1872924415, now seen corresponding path program 1 times [2023-11-23 07:35:07,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:35:07,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776510270] [2023-11-23 07:35:07,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:35:07,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:35:07,704 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:35:07,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1378086299] [2023-11-23 07:35:07,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:35:07,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:35:07,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:35:07,707 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 07:35:07,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 07:35:08,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:35:08,171 INFO L262 TraceCheckSpWp]: Trace formula consists of 2641 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-23 07:35:08,175 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:35:08,231 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 149 proven. 1 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2023-11-23 07:35:08,232 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 07:35:08,432 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2023-11-23 07:35:08,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:35:08,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776510270] [2023-11-23 07:35:08,432 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:35:08,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378086299] [2023-11-23 07:35:08,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378086299] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 07:35:08,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 07:35:08,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2023-11-23 07:35:08,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435044128] [2023-11-23 07:35:08,433 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 07:35:08,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-23 07:35:08,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:35:08,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-23 07:35:08,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-11-23 07:35:08,434 INFO L87 Difference]: Start difference. First operand 181 states and 243 transitions. Second operand has 13 states, 11 states have (on average 6.090909090909091) internal successors, (67), 13 states have internal predecessors, (67), 6 states have call successors, (32), 2 states have call predecessors, (32), 5 states have return successors, (32), 6 states have call predecessors, (32), 6 states have call successors, (32) [2023-11-23 07:35:08,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:35:08,919 INFO L93 Difference]: Finished difference Result 352 states and 468 transitions. [2023-11-23 07:35:08,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 07:35:08,920 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 6.090909090909091) internal successors, (67), 13 states have internal predecessors, (67), 6 states have call successors, (32), 2 states have call predecessors, (32), 5 states have return successors, (32), 6 states have call predecessors, (32), 6 states have call successors, (32) Word has length 128 [2023-11-23 07:35:08,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:35:08,921 INFO L225 Difference]: With dead ends: 352 [2023-11-23 07:35:08,921 INFO L226 Difference]: Without dead ends: 182 [2023-11-23 07:35:08,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-11-23 07:35:08,922 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 16 mSDsluCounter, 1067 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 1284 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 07:35:08,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 1284 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 07:35:08,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2023-11-23 07:35:08,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2023-11-23 07:35:08,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 111 states have (on average 1.2432432432432432) internal successors, (138), 114 states have internal predecessors, (138), 54 states have call successors, (54), 16 states have call predecessors, (54), 16 states have return successors, (52), 51 states have call predecessors, (52), 52 states have call successors, (52) [2023-11-23 07:35:08,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 244 transitions. [2023-11-23 07:35:08,929 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 244 transitions. Word has length 128 [2023-11-23 07:35:08,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:35:08,930 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 244 transitions. [2023-11-23 07:35:08,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 6.090909090909091) internal successors, (67), 13 states have internal predecessors, (67), 6 states have call successors, (32), 2 states have call predecessors, (32), 5 states have return successors, (32), 6 states have call predecessors, (32), 6 states have call successors, (32) [2023-11-23 07:35:08,930 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 244 transitions. [2023-11-23 07:35:08,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-11-23 07:35:08,931 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:35:08,931 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 07:35:08,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 07:35:09,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:35:09,133 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:35:09,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:35:09,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1232556745, now seen corresponding path program 2 times [2023-11-23 07:35:09,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:35:09,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424923862] [2023-11-23 07:35:09,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:35:09,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:35:09,180 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:35:09,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [657425800] [2023-11-23 07:35:09,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 07:35:09,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:35:09,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:35:09,182 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 07:35:09,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 07:35:09,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 07:35:09,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 07:35:09,771 INFO L262 TraceCheckSpWp]: Trace formula consists of 2679 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-23 07:35:09,774 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:35:09,843 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2023-11-23 07:35:09,843 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 07:35:10,102 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-11-23 07:35:10,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:35:10,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424923862] [2023-11-23 07:35:10,103 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:35:10,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657425800] [2023-11-23 07:35:10,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657425800] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 07:35:10,103 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 07:35:10,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2023-11-23 07:35:10,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217366707] [2023-11-23 07:35:10,104 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 07:35:10,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-23 07:35:10,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:35:10,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-23 07:35:10,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-11-23 07:35:10,105 INFO L87 Difference]: Start difference. First operand 182 states and 244 transitions. Second operand has 15 states, 13 states have (on average 4.461538461538462) internal successors, (58), 15 states have internal predecessors, (58), 6 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 6 states have call predecessors, (26), 6 states have call successors, (26) [2023-11-23 07:35:10,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:35:10,872 INFO L93 Difference]: Finished difference Result 354 states and 470 transitions. [2023-11-23 07:35:10,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-23 07:35:10,874 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 4.461538461538462) internal successors, (58), 15 states have internal predecessors, (58), 6 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 6 states have call predecessors, (26), 6 states have call successors, (26) Word has length 130 [2023-11-23 07:35:10,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:35:10,875 INFO L225 Difference]: With dead ends: 354 [2023-11-23 07:35:10,875 INFO L226 Difference]: Without dead ends: 183 [2023-11-23 07:35:10,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2023-11-23 07:35:10,876 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 12 mSDsluCounter, 1705 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 1922 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-23 07:35:10,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 1922 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-23 07:35:10,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2023-11-23 07:35:10,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2023-11-23 07:35:10,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 112 states have (on average 1.2410714285714286) internal successors, (139), 115 states have internal predecessors, (139), 54 states have call successors, (54), 16 states have call predecessors, (54), 16 states have return successors, (52), 51 states have call predecessors, (52), 52 states have call successors, (52) [2023-11-23 07:35:10,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 245 transitions. [2023-11-23 07:35:10,884 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 245 transitions. Word has length 130 [2023-11-23 07:35:10,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:35:10,885 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 245 transitions. [2023-11-23 07:35:10,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 4.461538461538462) internal successors, (58), 15 states have internal predecessors, (58), 6 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 6 states have call predecessors, (26), 6 states have call successors, (26) [2023-11-23 07:35:10,885 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 245 transitions. [2023-11-23 07:35:10,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-11-23 07:35:10,886 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:35:10,886 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 07:35:10,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-23 07:35:11,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:35:11,096 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:35:11,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:35:11,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1129389121, now seen corresponding path program 3 times [2023-11-23 07:35:11,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:35:11,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247182251] [2023-11-23 07:35:11,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:35:11,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:35:11,166 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:35:11,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [58616085] [2023-11-23 07:35:11,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 07:35:11,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:35:11,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:35:11,175 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 07:35:11,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-23 07:35:12,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-23 07:35:12,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 07:35:12,098 INFO L262 TraceCheckSpWp]: Trace formula consists of 2180 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-23 07:35:12,102 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:35:12,195 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 31 proven. 6 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2023-11-23 07:35:12,195 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 07:35:12,456 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 24 proven. 6 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2023-11-23 07:35:12,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:35:12,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247182251] [2023-11-23 07:35:12,457 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:35:12,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58616085] [2023-11-23 07:35:12,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58616085] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 07:35:12,457 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 07:35:12,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2023-11-23 07:35:12,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228100801] [2023-11-23 07:35:12,457 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 07:35:12,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-23 07:35:12,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:35:12,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-23 07:35:12,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2023-11-23 07:35:12,459 INFO L87 Difference]: Start difference. First operand 183 states and 245 transitions. Second operand has 17 states, 15 states have (on average 4.0) internal successors, (60), 17 states have internal predecessors, (60), 6 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 6 states have call predecessors, (26), 6 states have call successors, (26) [2023-11-23 07:35:13,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:35:13,112 INFO L93 Difference]: Finished difference Result 356 states and 472 transitions. [2023-11-23 07:35:13,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-23 07:35:13,113 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 4.0) internal successors, (60), 17 states have internal predecessors, (60), 6 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 6 states have call predecessors, (26), 6 states have call successors, (26) Word has length 132 [2023-11-23 07:35:13,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:35:13,114 INFO L225 Difference]: With dead ends: 356 [2023-11-23 07:35:13,114 INFO L226 Difference]: Without dead ends: 184 [2023-11-23 07:35:13,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2023-11-23 07:35:13,115 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 17 mSDsluCounter, 1280 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 1497 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 07:35:13,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 1497 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 07:35:13,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2023-11-23 07:35:13,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2023-11-23 07:35:13,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 113 states have (on average 1.238938053097345) internal successors, (140), 116 states have internal predecessors, (140), 54 states have call successors, (54), 16 states have call predecessors, (54), 16 states have return successors, (52), 51 states have call predecessors, (52), 52 states have call successors, (52) [2023-11-23 07:35:13,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 246 transitions. [2023-11-23 07:35:13,121 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 246 transitions. Word has length 132 [2023-11-23 07:35:13,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:35:13,121 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 246 transitions. [2023-11-23 07:35:13,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 4.0) internal successors, (60), 17 states have internal predecessors, (60), 6 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 6 states have call predecessors, (26), 6 states have call successors, (26) [2023-11-23 07:35:13,121 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 246 transitions. [2023-11-23 07:35:13,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-11-23 07:35:13,122 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:35:13,122 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 07:35:13,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-23 07:35:13,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:35:13,336 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:35:13,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:35:13,337 INFO L85 PathProgramCache]: Analyzing trace with hash 72639497, now seen corresponding path program 4 times [2023-11-23 07:35:13,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:35:13,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844434953] [2023-11-23 07:35:13,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:35:13,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:35:13,392 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:35:13,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [76493528] [2023-11-23 07:35:13,393 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-23 07:35:13,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:35:13,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:35:13,394 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 07:35:13,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-23 07:35:13,961 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-23 07:35:13,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 07:35:13,971 INFO L262 TraceCheckSpWp]: Trace formula consists of 2755 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-23 07:35:13,975 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:35:14,091 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 170 proven. 10 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2023-11-23 07:35:14,091 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 07:35:14,365 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2023-11-23 07:35:14,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:35:14,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844434953] [2023-11-23 07:35:14,366 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:35:14,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76493528] [2023-11-23 07:35:14,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76493528] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 07:35:14,366 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 07:35:14,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2023-11-23 07:35:14,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309571551] [2023-11-23 07:35:14,366 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 07:35:14,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-23 07:35:14,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:35:14,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-23 07:35:14,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2023-11-23 07:35:14,368 INFO L87 Difference]: Start difference. First operand 184 states and 246 transitions. Second operand has 19 states, 17 states have (on average 4.294117647058823) internal successors, (73), 19 states have internal predecessors, (73), 6 states have call successors, (32), 2 states have call predecessors, (32), 5 states have return successors, (32), 6 states have call predecessors, (32), 6 states have call successors, (32) [2023-11-23 07:35:15,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:35:15,229 INFO L93 Difference]: Finished difference Result 358 states and 474 transitions. [2023-11-23 07:35:15,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-23 07:35:15,230 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 4.294117647058823) internal successors, (73), 19 states have internal predecessors, (73), 6 states have call successors, (32), 2 states have call predecessors, (32), 5 states have return successors, (32), 6 states have call predecessors, (32), 6 states have call successors, (32) Word has length 134 [2023-11-23 07:35:15,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:35:15,231 INFO L225 Difference]: With dead ends: 358 [2023-11-23 07:35:15,231 INFO L226 Difference]: Without dead ends: 185 [2023-11-23 07:35:15,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2023-11-23 07:35:15,232 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 10 mSDsluCounter, 2559 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 2776 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-23 07:35:15,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 2776 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-23 07:35:15,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2023-11-23 07:35:15,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2023-11-23 07:35:15,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 114 states have (on average 1.236842105263158) internal successors, (141), 117 states have internal predecessors, (141), 54 states have call successors, (54), 16 states have call predecessors, (54), 16 states have return successors, (52), 51 states have call predecessors, (52), 52 states have call successors, (52) [2023-11-23 07:35:15,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 247 transitions. [2023-11-23 07:35:15,239 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 247 transitions. Word has length 134 [2023-11-23 07:35:15,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:35:15,239 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 247 transitions. [2023-11-23 07:35:15,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 4.294117647058823) internal successors, (73), 19 states have internal predecessors, (73), 6 states have call successors, (32), 2 states have call predecessors, (32), 5 states have return successors, (32), 6 states have call predecessors, (32), 6 states have call successors, (32) [2023-11-23 07:35:15,239 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 247 transitions. [2023-11-23 07:35:15,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-11-23 07:35:15,240 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:35:15,240 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 07:35:15,260 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-23 07:35:15,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-23 07:35:15,441 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:35:15,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:35:15,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1980864639, now seen corresponding path program 5 times [2023-11-23 07:35:15,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:35:15,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530265795] [2023-11-23 07:35:15,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:35:15,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:35:15,512 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:35:15,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1405318289] [2023-11-23 07:35:15,513 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-23 07:35:15,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:35:15,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:35:15,514 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 07:35:15,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-23 07:35:16,851 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-11-23 07:35:16,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 07:35:16,856 INFO L262 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-23 07:35:16,860 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:35:16,997 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 181 proven. 15 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2023-11-23 07:35:16,997 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 07:35:17,340 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2023-11-23 07:35:17,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:35:17,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530265795] [2023-11-23 07:35:17,340 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:35:17,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405318289] [2023-11-23 07:35:17,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405318289] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 07:35:17,340 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 07:35:17,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2023-11-23 07:35:17,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524580641] [2023-11-23 07:35:17,341 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 07:35:17,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-23 07:35:17,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:35:17,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-23 07:35:17,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2023-11-23 07:35:17,342 INFO L87 Difference]: Start difference. First operand 185 states and 247 transitions. Second operand has 21 states, 19 states have (on average 3.9473684210526314) internal successors, (75), 21 states have internal predecessors, (75), 6 states have call successors, (32), 2 states have call predecessors, (32), 5 states have return successors, (32), 6 states have call predecessors, (32), 6 states have call successors, (32) [2023-11-23 07:35:18,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:35:18,741 INFO L93 Difference]: Finished difference Result 360 states and 476 transitions. [2023-11-23 07:35:18,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-23 07:35:18,742 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 3.9473684210526314) internal successors, (75), 21 states have internal predecessors, (75), 6 states have call successors, (32), 2 states have call predecessors, (32), 5 states have return successors, (32), 6 states have call predecessors, (32), 6 states have call successors, (32) Word has length 136 [2023-11-23 07:35:18,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:35:18,745 INFO L225 Difference]: With dead ends: 360 [2023-11-23 07:35:18,746 INFO L226 Difference]: Without dead ends: 186 [2023-11-23 07:35:18,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2023-11-23 07:35:18,749 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 15 mSDsluCounter, 2560 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 2777 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-23 07:35:18,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 2777 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-23 07:35:18,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2023-11-23 07:35:18,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2023-11-23 07:35:18,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 115 states have (on average 1.2347826086956522) internal successors, (142), 118 states have internal predecessors, (142), 54 states have call successors, (54), 16 states have call predecessors, (54), 16 states have return successors, (52), 51 states have call predecessors, (52), 52 states have call successors, (52) [2023-11-23 07:35:18,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 248 transitions. [2023-11-23 07:35:18,762 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 248 transitions. Word has length 136 [2023-11-23 07:35:18,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:35:18,763 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 248 transitions. [2023-11-23 07:35:18,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 3.9473684210526314) internal successors, (75), 21 states have internal predecessors, (75), 6 states have call successors, (32), 2 states have call predecessors, (32), 5 states have return successors, (32), 6 states have call predecessors, (32), 6 states have call successors, (32) [2023-11-23 07:35:18,763 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 248 transitions. [2023-11-23 07:35:18,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-11-23 07:35:18,764 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:35:18,765 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 07:35:18,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-23 07:35:18,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:35:18,972 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:35:18,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:35:18,973 INFO L85 PathProgramCache]: Analyzing trace with hash 570266953, now seen corresponding path program 6 times [2023-11-23 07:35:18,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:35:18,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350483391] [2023-11-23 07:35:18,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:35:18,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:35:19,044 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:35:19,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [754645705] [2023-11-23 07:35:19,045 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-23 07:35:19,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:35:19,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:35:19,061 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 07:35:19,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-23 07:35:21,542 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-11-23 07:35:21,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 07:35:21,552 INFO L262 TraceCheckSpWp]: Trace formula consists of 2335 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-23 07:35:21,555 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:35:21,664 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 64 proven. 21 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2023-11-23 07:35:21,665 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 07:35:22,007 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2023-11-23 07:35:22,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:35:22,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350483391] [2023-11-23 07:35:22,007 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:35:22,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754645705] [2023-11-23 07:35:22,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754645705] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 07:35:22,008 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 07:35:22,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2023-11-23 07:35:22,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008755143] [2023-11-23 07:35:22,009 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 07:35:22,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-23 07:35:22,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:35:22,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-23 07:35:22,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2023-11-23 07:35:22,011 INFO L87 Difference]: Start difference. First operand 186 states and 248 transitions. Second operand has 23 states, 21 states have (on average 3.142857142857143) internal successors, (66), 23 states have internal predecessors, (66), 6 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 6 states have call predecessors, (26), 6 states have call successors, (26) [2023-11-23 07:35:23,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:35:23,348 INFO L93 Difference]: Finished difference Result 362 states and 478 transitions. [2023-11-23 07:35:23,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-23 07:35:23,349 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 3.142857142857143) internal successors, (66), 23 states have internal predecessors, (66), 6 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 6 states have call predecessors, (26), 6 states have call successors, (26) Word has length 138 [2023-11-23 07:35:23,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:35:23,350 INFO L225 Difference]: With dead ends: 362 [2023-11-23 07:35:23,350 INFO L226 Difference]: Without dead ends: 187 [2023-11-23 07:35:23,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2023-11-23 07:35:23,351 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 12 mSDsluCounter, 2771 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 2988 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-23 07:35:23,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 2988 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-23 07:35:23,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2023-11-23 07:35:23,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2023-11-23 07:35:23,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 116 states have (on average 1.2327586206896552) internal successors, (143), 119 states have internal predecessors, (143), 54 states have call successors, (54), 16 states have call predecessors, (54), 16 states have return successors, (52), 51 states have call predecessors, (52), 52 states have call successors, (52) [2023-11-23 07:35:23,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 249 transitions. [2023-11-23 07:35:23,357 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 249 transitions. Word has length 138 [2023-11-23 07:35:23,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:35:23,357 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 249 transitions. [2023-11-23 07:35:23,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 3.142857142857143) internal successors, (66), 23 states have internal predecessors, (66), 6 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 6 states have call predecessors, (26), 6 states have call successors, (26) [2023-11-23 07:35:23,357 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 249 transitions. [2023-11-23 07:35:23,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2023-11-23 07:35:23,358 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:35:23,358 INFO L195 NwaCegarLoop]: trace histogram [14, 12, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 07:35:23,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-23 07:35:23,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-23 07:35:23,571 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:35:23,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:35:23,572 INFO L85 PathProgramCache]: Analyzing trace with hash -15379775, now seen corresponding path program 7 times [2023-11-23 07:35:23,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:35:23,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904784401] [2023-11-23 07:35:23,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:35:23,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:35:23,633 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:35:23,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [808521355] [2023-11-23 07:35:23,634 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-23 07:35:23,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:35:23,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:35:23,635 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 07:35:23,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-23 07:35:24,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:35:24,606 INFO L262 TraceCheckSpWp]: Trace formula consists of 2869 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-23 07:35:24,610 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:35:24,760 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 209 proven. 28 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2023-11-23 07:35:24,760 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 07:35:25,253 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2023-11-23 07:35:25,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:35:25,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904784401] [2023-11-23 07:35:25,254 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:35:25,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808521355] [2023-11-23 07:35:25,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808521355] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 07:35:25,254 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 07:35:25,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2023-11-23 07:35:25,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655820409] [2023-11-23 07:35:25,254 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 07:35:25,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-23 07:35:25,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:35:25,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-23 07:35:25,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2023-11-23 07:35:25,256 INFO L87 Difference]: Start difference. First operand 187 states and 249 transitions. Second operand has 25 states, 23 states have (on average 3.4347826086956523) internal successors, (79), 25 states have internal predecessors, (79), 6 states have call successors, (32), 2 states have call predecessors, (32), 5 states have return successors, (32), 6 states have call predecessors, (32), 6 states have call successors, (32) [2023-11-23 07:35:26,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:35:26,773 INFO L93 Difference]: Finished difference Result 364 states and 480 transitions. [2023-11-23 07:35:26,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-23 07:35:26,774 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 3.4347826086956523) internal successors, (79), 25 states have internal predecessors, (79), 6 states have call successors, (32), 2 states have call predecessors, (32), 5 states have return successors, (32), 6 states have call predecessors, (32), 6 states have call successors, (32) Word has length 140 [2023-11-23 07:35:26,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:35:26,775 INFO L225 Difference]: With dead ends: 364 [2023-11-23 07:35:26,775 INFO L226 Difference]: Without dead ends: 188 [2023-11-23 07:35:26,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=147, Invalid=609, Unknown=0, NotChecked=0, Total=756 [2023-11-23 07:35:26,777 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 15 mSDsluCounter, 2773 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 2990 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-23 07:35:26,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 2990 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-23 07:35:26,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2023-11-23 07:35:26,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2023-11-23 07:35:26,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 117 states have (on average 1.2307692307692308) internal successors, (144), 120 states have internal predecessors, (144), 54 states have call successors, (54), 16 states have call predecessors, (54), 16 states have return successors, (52), 51 states have call predecessors, (52), 52 states have call successors, (52) [2023-11-23 07:35:26,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 250 transitions. [2023-11-23 07:35:26,787 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 250 transitions. Word has length 140 [2023-11-23 07:35:26,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:35:26,789 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 250 transitions. [2023-11-23 07:35:26,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 3.4347826086956523) internal successors, (79), 25 states have internal predecessors, (79), 6 states have call successors, (32), 2 states have call predecessors, (32), 5 states have return successors, (32), 6 states have call predecessors, (32), 6 states have call successors, (32) [2023-11-23 07:35:26,790 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 250 transitions. [2023-11-23 07:35:26,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-11-23 07:35:26,793 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:35:26,793 INFO L195 NwaCegarLoop]: trace histogram [16, 12, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 07:35:26,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-23 07:35:27,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-23 07:35:27,000 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:35:27,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:35:27,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1823663753, now seen corresponding path program 8 times [2023-11-23 07:35:27,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:35:27,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206277932] [2023-11-23 07:35:27,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:35:27,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:35:27,075 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:35:27,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1978813421] [2023-11-23 07:35:27,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 07:35:27,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:35:27,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:35:27,104 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 07:35:27,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-23 07:35:29,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 07:35:29,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 07:35:29,168 INFO L262 TraceCheckSpWp]: Trace formula consists of 2907 conjuncts, 55 conjunts are in the unsatisfiable core [2023-11-23 07:35:29,189 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:35:29,337 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 226 proven. 36 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2023-11-23 07:35:29,337 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 07:35:29,849 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 89 proven. 36 refuted. 0 times theorem prover too weak. 309 trivial. 0 not checked. [2023-11-23 07:35:29,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:35:29,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206277932] [2023-11-23 07:35:29,850 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:35:29,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978813421] [2023-11-23 07:35:29,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978813421] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 07:35:29,850 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 07:35:29,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2023-11-23 07:35:29,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135172800] [2023-11-23 07:35:29,850 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 07:35:29,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-23 07:35:29,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:35:29,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-23 07:35:29,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2023-11-23 07:35:29,852 INFO L87 Difference]: Start difference. First operand 188 states and 250 transitions. Second operand has 28 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 28 states have internal predecessors, (86), 6 states have call successors, (32), 2 states have call predecessors, (32), 6 states have return successors, (32), 6 states have call predecessors, (32), 6 states have call successors, (32) [2023-11-23 07:35:31,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:35:31,797 INFO L93 Difference]: Finished difference Result 366 states and 482 transitions. [2023-11-23 07:35:31,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-23 07:35:31,798 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 28 states have internal predecessors, (86), 6 states have call successors, (32), 2 states have call predecessors, (32), 6 states have return successors, (32), 6 states have call predecessors, (32), 6 states have call successors, (32) Word has length 142 [2023-11-23 07:35:31,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:35:31,801 INFO L225 Difference]: With dead ends: 366 [2023-11-23 07:35:31,802 INFO L226 Difference]: Without dead ends: 189 [2023-11-23 07:35:31,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=216, Invalid=1344, Unknown=0, NotChecked=0, Total=1560 [2023-11-23 07:35:31,803 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 11 mSDsluCounter, 3413 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 3630 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-23 07:35:31,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 3630 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-23 07:35:31,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2023-11-23 07:35:31,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2023-11-23 07:35:31,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 118 states have (on average 1.228813559322034) internal successors, (145), 121 states have internal predecessors, (145), 54 states have call successors, (54), 16 states have call predecessors, (54), 16 states have return successors, (52), 51 states have call predecessors, (52), 52 states have call successors, (52) [2023-11-23 07:35:31,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 251 transitions. [2023-11-23 07:35:31,813 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 251 transitions. Word has length 142 [2023-11-23 07:35:31,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:35:31,814 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 251 transitions. [2023-11-23 07:35:31,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 28 states have internal predecessors, (86), 6 states have call successors, (32), 2 states have call predecessors, (32), 6 states have return successors, (32), 6 states have call predecessors, (32), 6 states have call successors, (32) [2023-11-23 07:35:31,814 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 251 transitions. [2023-11-23 07:35:31,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-11-23 07:35:31,815 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:35:31,815 INFO L195 NwaCegarLoop]: trace histogram [18, 12, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 07:35:31,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-23 07:35:32,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-23 07:35:32,028 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:35:32,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:35:32,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1638260225, now seen corresponding path program 9 times [2023-11-23 07:35:32,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:35:32,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452693485] [2023-11-23 07:35:32,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:35:32,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:35:32,135 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:35:32,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [61516441] [2023-11-23 07:35:32,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 07:35:32,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:35:32,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:35:32,153 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 07:35:32,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-23 07:37:37,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-23 07:37:37,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 07:37:37,471 INFO L262 TraceCheckSpWp]: Trace formula consists of 2372 conjuncts, 74 conjunts are in the unsatisfiable core [2023-11-23 07:37:37,482 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:37:37,731 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 19 treesize of output 1 [2023-11-23 07:37:37,991 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 113 proven. 45 refuted. 0 times theorem prover too weak. 313 trivial. 0 not checked. [2023-11-23 07:37:37,992 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 07:37:38,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:37:38,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452693485] [2023-11-23 07:37:38,176 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:37:38,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61516441] [2023-11-23 07:37:38,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61516441] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 07:37:38,176 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-23 07:37:38,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2023-11-23 07:37:38,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874643825] [2023-11-23 07:37:38,176 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-23 07:37:38,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-23 07:37:38,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:37:38,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-23 07:37:38,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2023-11-23 07:37:38,178 INFO L87 Difference]: Start difference. First operand 189 states and 251 transitions. Second operand has 18 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 18 states have internal predecessors, (57), 6 states have call successors, (23), 3 states have call predecessors, (23), 4 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2023-11-23 07:37:41,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:37:41,175 INFO L93 Difference]: Finished difference Result 293 states and 394 transitions. [2023-11-23 07:37:41,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-23 07:37:41,176 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 18 states have internal predecessors, (57), 6 states have call successors, (23), 3 states have call predecessors, (23), 4 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) Word has length 144 [2023-11-23 07:37:41,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:37:41,177 INFO L225 Difference]: With dead ends: 293 [2023-11-23 07:37:41,178 INFO L226 Difference]: Without dead ends: 198 [2023-11-23 07:37:41,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=105, Invalid=1155, Unknown=0, NotChecked=0, Total=1260 [2023-11-23 07:37:41,180 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 104 mSDsluCounter, 1974 mSDsCounter, 0 mSdLazyCounter, 1849 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 2135 SdHoareTripleChecker+Invalid, 1913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-11-23 07:37:41,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 2135 Invalid, 1913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1849 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-11-23 07:37:41,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2023-11-23 07:37:41,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 191. [2023-11-23 07:37:41,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 120 states have (on average 1.225) internal successors, (147), 123 states have internal predecessors, (147), 54 states have call successors, (54), 16 states have call predecessors, (54), 16 states have return successors, (52), 51 states have call predecessors, (52), 52 states have call successors, (52) [2023-11-23 07:37:41,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 253 transitions. [2023-11-23 07:37:41,192 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 253 transitions. Word has length 144 [2023-11-23 07:37:41,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:37:41,193 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 253 transitions. [2023-11-23 07:37:41,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 18 states have internal predecessors, (57), 6 states have call successors, (23), 3 states have call predecessors, (23), 4 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2023-11-23 07:37:41,193 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 253 transitions. [2023-11-23 07:37:41,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2023-11-23 07:37:41,195 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:37:41,196 INFO L195 NwaCegarLoop]: trace histogram [18, 12, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 07:37:41,274 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-23 07:37:41,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-23 07:37:41,416 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:37:41,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:37:41,417 INFO L85 PathProgramCache]: Analyzing trace with hash -439835032, now seen corresponding path program 1 times [2023-11-23 07:37:41,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:37:41,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009613909] [2023-11-23 07:37:41,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:37:41,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:37:41,488 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:37:41,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [623573514] [2023-11-23 07:37:41,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:37:41,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:37:41,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:37:41,490 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 07:37:41,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-23 07:37:42,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:37:42,190 INFO L262 TraceCheckSpWp]: Trace formula consists of 2928 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-23 07:37:42,194 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:37:42,251 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2023-11-23 07:37:42,251 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 07:37:42,372 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 471 trivial. 0 not checked. [2023-11-23 07:37:42,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:37:42,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009613909] [2023-11-23 07:37:42,373 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:37:42,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623573514] [2023-11-23 07:37:42,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623573514] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-23 07:37:42,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 07:37:42,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2023-11-23 07:37:42,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276250974] [2023-11-23 07:37:42,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 07:37:42,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 07:37:42,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:37:42,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 07:37:42,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-11-23 07:37:42,375 INFO L87 Difference]: Start difference. First operand 191 states and 253 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 1 states have call successors, (20) [2023-11-23 07:37:42,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:37:42,590 INFO L93 Difference]: Finished difference Result 289 states and 397 transitions. [2023-11-23 07:37:42,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 07:37:42,591 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 1 states have call successors, (20) Word has length 147 [2023-11-23 07:37:42,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:37:42,592 INFO L225 Difference]: With dead ends: 289 [2023-11-23 07:37:42,593 INFO L226 Difference]: Without dead ends: 194 [2023-11-23 07:37:42,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-11-23 07:37:42,594 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 3 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 628 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 07:37:42,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 628 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 07:37:42,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2023-11-23 07:37:42,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 192. [2023-11-23 07:37:42,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 121 states have (on average 1.2231404958677685) internal successors, (148), 124 states have internal predecessors, (148), 54 states have call successors, (54), 16 states have call predecessors, (54), 16 states have return successors, (52), 51 states have call predecessors, (52), 52 states have call successors, (52) [2023-11-23 07:37:42,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 254 transitions. [2023-11-23 07:37:42,602 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 254 transitions. Word has length 147 [2023-11-23 07:37:42,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:37:42,603 INFO L495 AbstractCegarLoop]: Abstraction has 192 states and 254 transitions. [2023-11-23 07:37:42,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 1 states have call successors, (20) [2023-11-23 07:37:42,603 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 254 transitions. [2023-11-23 07:37:42,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2023-11-23 07:37:42,604 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:37:42,605 INFO L195 NwaCegarLoop]: trace histogram [18, 12, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 07:37:42,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-23 07:37:42,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:37:42,820 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:37:42,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:37:42,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1128227167, now seen corresponding path program 1 times [2023-11-23 07:37:42,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:37:42,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012373261] [2023-11-23 07:37:42,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:37:42,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:37:42,875 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:37:42,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [288660811] [2023-11-23 07:37:42,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:37:42,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:37:42,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:37:42,876 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 07:37:42,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-23 07:37:43,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:37:43,473 INFO L262 TraceCheckSpWp]: Trace formula consists of 2931 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 07:37:43,477 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:37:43,498 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 469 trivial. 0 not checked. [2023-11-23 07:37:43,499 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 07:37:43,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:37:43,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012373261] [2023-11-23 07:37:43,499 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:37:43,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288660811] [2023-11-23 07:37:43,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288660811] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 07:37:43,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 07:37:43,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 07:37:43,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973136217] [2023-11-23 07:37:43,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 07:37:43,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 07:37:43,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:37:43,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 07:37:43,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 07:37:43,503 INFO L87 Difference]: Start difference. First operand 192 states and 254 transitions. Second operand has 5 states, 4 states have (on average 10.25) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) [2023-11-23 07:37:43,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:37:43,763 INFO L93 Difference]: Finished difference Result 290 states and 389 transitions. [2023-11-23 07:37:43,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 07:37:43,764 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 10.25) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) Word has length 147 [2023-11-23 07:37:43,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:37:43,766 INFO L225 Difference]: With dead ends: 290 [2023-11-23 07:37:43,766 INFO L226 Difference]: Without dead ends: 196 [2023-11-23 07:37:43,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-23 07:37:43,767 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 1 mSDsluCounter, 654 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 874 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 07:37:43,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 874 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 07:37:43,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2023-11-23 07:37:43,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2023-11-23 07:37:43,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 124 states have (on average 1.217741935483871) internal successors, (151), 127 states have internal predecessors, (151), 54 states have call successors, (54), 16 states have call predecessors, (54), 17 states have return successors, (55), 52 states have call predecessors, (55), 52 states have call successors, (55) [2023-11-23 07:37:43,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 260 transitions. [2023-11-23 07:37:43,777 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 260 transitions. Word has length 147 [2023-11-23 07:37:43,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:37:43,777 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 260 transitions. [2023-11-23 07:37:43,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 10.25) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) [2023-11-23 07:37:43,778 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 260 transitions. [2023-11-23 07:37:43,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2023-11-23 07:37:43,779 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:37:43,779 INFO L195 NwaCegarLoop]: trace histogram [18, 12, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 07:37:43,804 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-23 07:37:43,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-23 07:37:43,992 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:37:43,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:37:43,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1538165829, now seen corresponding path program 1 times [2023-11-23 07:37:43,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:37:43,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361999689] [2023-11-23 07:37:43,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:37:43,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:37:44,084 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:37:44,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2075873467] [2023-11-23 07:37:44,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:37:44,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:37:44,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:37:44,085 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 07:37:44,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-23 07:37:45,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:37:45,146 INFO L262 TraceCheckSpWp]: Trace formula consists of 2930 conjuncts, 58 conjunts are in the unsatisfiable core [2023-11-23 07:37:45,149 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:37:45,307 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 245 proven. 45 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2023-11-23 07:37:45,307 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 07:37:45,873 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2023-11-23 07:37:45,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:37:45,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361999689] [2023-11-23 07:37:45,874 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:37:45,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075873467] [2023-11-23 07:37:45,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075873467] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 07:37:45,874 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 07:37:45,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2023-11-23 07:37:45,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526854340] [2023-11-23 07:37:45,874 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 07:37:45,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-23 07:37:45,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:37:45,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-23 07:37:45,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=701, Unknown=0, NotChecked=0, Total=812 [2023-11-23 07:37:45,876 INFO L87 Difference]: Start difference. First operand 196 states and 260 transitions. Second operand has 29 states, 27 states have (on average 3.4444444444444446) internal successors, (93), 29 states have internal predecessors, (93), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2023-11-23 07:37:47,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:37:47,256 INFO L93 Difference]: Finished difference Result 382 states and 501 transitions. [2023-11-23 07:37:47,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-23 07:37:47,257 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 3.4444444444444446) internal successors, (93), 29 states have internal predecessors, (93), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) Word has length 151 [2023-11-23 07:37:47,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:37:47,258 INFO L225 Difference]: With dead ends: 382 [2023-11-23 07:37:47,258 INFO L226 Difference]: Without dead ends: 197 [2023-11-23 07:37:47,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 273 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=164, Invalid=958, Unknown=0, NotChecked=0, Total=1122 [2023-11-23 07:37:47,260 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 11 mSDsluCounter, 2984 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 3201 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-23 07:37:47,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 3201 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-23 07:37:47,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2023-11-23 07:37:47,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2023-11-23 07:37:47,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 125 states have (on average 1.216) internal successors, (152), 128 states have internal predecessors, (152), 54 states have call successors, (54), 16 states have call predecessors, (54), 17 states have return successors, (55), 52 states have call predecessors, (55), 52 states have call successors, (55) [2023-11-23 07:37:47,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 261 transitions. [2023-11-23 07:37:47,275 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 261 transitions. Word has length 151 [2023-11-23 07:37:47,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:37:47,276 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 261 transitions. [2023-11-23 07:37:47,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 3.4444444444444446) internal successors, (93), 29 states have internal predecessors, (93), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2023-11-23 07:37:47,277 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 261 transitions. [2023-11-23 07:37:47,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2023-11-23 07:37:47,277 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:37:47,278 INFO L195 NwaCegarLoop]: trace histogram [20, 12, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 07:37:47,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-23 07:37:47,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-23 07:37:47,488 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:37:47,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:37:47,489 INFO L85 PathProgramCache]: Analyzing trace with hash 755040637, now seen corresponding path program 2 times [2023-11-23 07:37:47,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:37:47,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116995469] [2023-11-23 07:37:47,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:37:47,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:37:47,542 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:37:47,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1336685882] [2023-11-23 07:37:47,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 07:37:47,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:37:47,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:37:47,543 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 07:37:47,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-23 07:37:49,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 07:37:49,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 07:37:49,282 INFO L262 TraceCheckSpWp]: Trace formula consists of 2968 conjuncts, 65 conjunts are in the unsatisfiable core [2023-11-23 07:37:49,286 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:37:49,547 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 35 proven. 210 refuted. 0 times theorem prover too weak. 267 trivial. 0 not checked. [2023-11-23 07:37:49,547 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 07:37:50,111 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 129 proven. 55 refuted. 0 times theorem prover too weak. 328 trivial. 0 not checked. [2023-11-23 07:37:50,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:37:50,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116995469] [2023-11-23 07:37:50,112 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:37:50,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336685882] [2023-11-23 07:37:50,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336685882] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 07:37:50,153 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 07:37:50,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 17] total 41 [2023-11-23 07:37:50,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950661435] [2023-11-23 07:37:50,153 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 07:37:50,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-23 07:37:50,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:37:50,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-23 07:37:50,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1446, Unknown=0, NotChecked=0, Total=1640 [2023-11-23 07:37:50,155 INFO L87 Difference]: Start difference. First operand 197 states and 261 transitions. Second operand has 41 states, 39 states have (on average 2.4358974358974357) internal successors, (95), 41 states have internal predecessors, (95), 6 states have call successors, (30), 2 states have call predecessors, (30), 5 states have return successors, (31), 6 states have call predecessors, (31), 6 states have call successors, (31) [2023-11-23 07:37:51,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:37:51,860 INFO L93 Difference]: Finished difference Result 384 states and 503 transitions. [2023-11-23 07:37:51,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-23 07:37:51,861 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 39 states have (on average 2.4358974358974357) internal successors, (95), 41 states have internal predecessors, (95), 6 states have call successors, (30), 2 states have call predecessors, (30), 5 states have return successors, (31), 6 states have call predecessors, (31), 6 states have call successors, (31) Word has length 153 [2023-11-23 07:37:51,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:37:51,863 INFO L225 Difference]: With dead ends: 384 [2023-11-23 07:37:51,863 INFO L226 Difference]: Without dead ends: 198 [2023-11-23 07:37:51,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 264 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=234, Invalid=1658, Unknown=0, NotChecked=0, Total=1892 [2023-11-23 07:37:51,864 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 15 mSDsluCounter, 6423 mSDsCounter, 0 mSdLazyCounter, 932 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 6640 SdHoareTripleChecker+Invalid, 933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 932 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-23 07:37:51,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 6640 Invalid, 933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 932 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-23 07:37:51,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2023-11-23 07:37:51,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2023-11-23 07:37:51,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 126 states have (on average 1.2142857142857142) internal successors, (153), 129 states have internal predecessors, (153), 54 states have call successors, (54), 16 states have call predecessors, (54), 17 states have return successors, (55), 52 states have call predecessors, (55), 52 states have call successors, (55) [2023-11-23 07:37:51,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 262 transitions. [2023-11-23 07:37:51,871 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 262 transitions. Word has length 153 [2023-11-23 07:37:51,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:37:51,873 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 262 transitions. [2023-11-23 07:37:51,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 39 states have (on average 2.4358974358974357) internal successors, (95), 41 states have internal predecessors, (95), 6 states have call successors, (30), 2 states have call predecessors, (30), 5 states have return successors, (31), 6 states have call predecessors, (31), 6 states have call successors, (31) [2023-11-23 07:37:51,873 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 262 transitions. [2023-11-23 07:37:51,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2023-11-23 07:37:51,874 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:37:51,874 INFO L195 NwaCegarLoop]: trace histogram [22, 12, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 07:37:51,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-23 07:37:52,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-23 07:37:52,096 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:37:52,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:37:52,097 INFO L85 PathProgramCache]: Analyzing trace with hash -362202875, now seen corresponding path program 3 times [2023-11-23 07:37:52,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:37:52,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73070591] [2023-11-23 07:37:52,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:37:52,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:37:52,154 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:37:52,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [652733966] [2023-11-23 07:37:52,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 07:37:52,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:37:52,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:37:52,156 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 07:37:52,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-23 07:38:29,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-11-23 07:38:29,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 07:38:29,446 INFO L262 TraceCheckSpWp]: Trace formula consists of 2586 conjuncts, 107 conjunts are in the unsatisfiable core [2023-11-23 07:38:29,468 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:38:29,519 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 15 treesize of output 1 [2023-11-23 07:38:29,554 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 84 treesize of output 68 [2023-11-23 07:38:29,612 INFO L349 Elim1Store]: treesize reduction 23, result has 4.2 percent of original size [2023-11-23 07:38:29,612 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 104 [2023-11-23 07:38:29,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:38:29,716 INFO L349 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2023-11-23 07:38:29,716 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 42 [2023-11-23 07:38:29,923 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 84 treesize of output 68 [2023-11-23 07:38:29,931 INFO L349 Elim1Store]: treesize reduction 23, result has 4.2 percent of original size [2023-11-23 07:38:29,932 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 104 [2023-11-23 07:38:30,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:38:30,038 INFO L349 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2023-11-23 07:38:30,038 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 27 [2023-11-23 07:38:30,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:38:30,077 INFO L349 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2023-11-23 07:38:30,078 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 31 [2023-11-23 07:38:30,156 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 84 treesize of output 68 [2023-11-23 07:38:30,164 INFO L349 Elim1Store]: treesize reduction 23, result has 4.2 percent of original size [2023-11-23 07:38:30,164 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 104 [2023-11-23 07:38:30,178 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 10 [2023-11-23 07:38:30,353 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 84 treesize of output 68 [2023-11-23 07:38:30,360 INFO L349 Elim1Store]: treesize reduction 23, result has 4.2 percent of original size [2023-11-23 07:38:30,360 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 104 [2023-11-23 07:38:30,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 34 [2023-11-23 07:38:30,553 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 84 treesize of output 68 [2023-11-23 07:38:30,562 INFO L349 Elim1Store]: treesize reduction 23, result has 4.2 percent of original size [2023-11-23 07:38:30,563 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 104 [2023-11-23 07:38:30,580 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 8 [2023-11-23 07:38:30,798 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 84 treesize of output 68 [2023-11-23 07:38:30,806 INFO L349 Elim1Store]: treesize reduction 23, result has 4.2 percent of original size [2023-11-23 07:38:30,807 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 104 [2023-11-23 07:38:30,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:38:30,836 INFO L349 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2023-11-23 07:38:30,836 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 40 [2023-11-23 07:38:30,974 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 84 treesize of output 68 [2023-11-23 07:38:30,981 INFO L349 Elim1Store]: treesize reduction 23, result has 4.2 percent of original size [2023-11-23 07:38:30,981 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 104 [2023-11-23 07:38:31,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:38:31,075 INFO L349 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2023-11-23 07:38:31,075 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 31 [2023-11-23 07:38:31,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:38:31,120 INFO L349 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2023-11-23 07:38:31,120 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 27 [2023-11-23 07:38:31,166 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 84 treesize of output 68 [2023-11-23 07:38:31,173 INFO L349 Elim1Store]: treesize reduction 23, result has 4.2 percent of original size [2023-11-23 07:38:31,174 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 104 [2023-11-23 07:38:31,194 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 10 [2023-11-23 07:38:31,354 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 84 treesize of output 68 [2023-11-23 07:38:31,362 INFO L349 Elim1Store]: treesize reduction 23, result has 4.2 percent of original size [2023-11-23 07:38:31,362 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 104 [2023-11-23 07:38:31,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:38:31,437 INFO L349 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2023-11-23 07:38:31,438 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 40 [2023-11-23 07:38:31,547 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 84 treesize of output 68 [2023-11-23 07:38:31,554 INFO L349 Elim1Store]: treesize reduction 23, result has 4.2 percent of original size [2023-11-23 07:38:31,554 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 104 [2023-11-23 07:38:31,597 INFO L349 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2023-11-23 07:38:31,597 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 40 [2023-11-23 07:38:32,517 INFO L134 CoverageAnalysis]: Checked inductivity of 557 backedges. 157 proven. 21 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2023-11-23 07:38:32,518 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 07:38:32,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:38:32,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73070591] [2023-11-23 07:38:32,894 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:38:32,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652733966] [2023-11-23 07:38:32,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652733966] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 07:38:32,895 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-23 07:38:32,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2023-11-23 07:38:32,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960399414] [2023-11-23 07:38:32,895 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-23 07:38:32,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-23 07:38:32,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:38:32,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-23 07:38:32,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2023-11-23 07:38:32,896 INFO L87 Difference]: Start difference. First operand 198 states and 262 transitions. Second operand has 14 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 states have internal predecessors, (54), 6 states have call successors, (25), 4 states have call predecessors, (25), 5 states have return successors, (24), 6 states have call predecessors, (24), 5 states have call successors, (24) [2023-11-23 07:38:37,993 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 07:38:40,079 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 07:38:42,262 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 07:38:44,994 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 07:38:47,536 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 07:38:48,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:38:48,259 INFO L93 Difference]: Finished difference Result 341 states and 457 transitions. [2023-11-23 07:38:48,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-23 07:38:48,259 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 states have internal predecessors, (54), 6 states have call successors, (25), 4 states have call predecessors, (25), 5 states have return successors, (24), 6 states have call predecessors, (24), 5 states have call successors, (24) Word has length 155 [2023-11-23 07:38:48,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:38:48,261 INFO L225 Difference]: With dead ends: 341 [2023-11-23 07:38:48,261 INFO L226 Difference]: Without dead ends: 246 [2023-11-23 07:38:48,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 143 SyntacticMatches, 9 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=128, Invalid=928, Unknown=0, NotChecked=0, Total=1056 [2023-11-23 07:38:48,262 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 144 mSDsluCounter, 1479 mSDsCounter, 0 mSdLazyCounter, 1802 mSolverCounterSat, 67 mSolverCounterUnsat, 33 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 1669 SdHoareTripleChecker+Invalid, 1902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1802 IncrementalHoareTripleChecker+Invalid, 33 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.8s IncrementalHoareTripleChecker+Time [2023-11-23 07:38:48,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 1669 Invalid, 1902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1802 Invalid, 33 Unknown, 0 Unchecked, 14.8s Time] [2023-11-23 07:38:48,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2023-11-23 07:38:48,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 233. [2023-11-23 07:38:48,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 148 states have (on average 1.222972972972973) internal successors, (181), 153 states have internal predecessors, (181), 62 states have call successors, (62), 20 states have call predecessors, (62), 22 states have return successors, (66), 59 states have call predecessors, (66), 59 states have call successors, (66) [2023-11-23 07:38:48,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 309 transitions. [2023-11-23 07:38:48,275 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 309 transitions. Word has length 155 [2023-11-23 07:38:48,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:38:48,275 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 309 transitions. [2023-11-23 07:38:48,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 states have internal predecessors, (54), 6 states have call successors, (25), 4 states have call predecessors, (25), 5 states have return successors, (24), 6 states have call predecessors, (24), 5 states have call successors, (24) [2023-11-23 07:38:48,276 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 309 transitions. [2023-11-23 07:38:48,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2023-11-23 07:38:48,276 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:38:48,276 INFO L195 NwaCegarLoop]: trace histogram [22, 12, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 07:38:48,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-23 07:38:48,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-23 07:38:48,488 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:38:48,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:38:48,489 INFO L85 PathProgramCache]: Analyzing trace with hash 562772105, now seen corresponding path program 1 times [2023-11-23 07:38:48,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:38:48,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958922291] [2023-11-23 07:38:48,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:38:48,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:38:48,574 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:38:48,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1373402691] [2023-11-23 07:38:48,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:38:48,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:38:48,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:38:48,576 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 07:38:48,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-23 07:38:49,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:38:49,296 INFO L262 TraceCheckSpWp]: Trace formula consists of 3010 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-23 07:38:49,299 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:38:49,396 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2023-11-23 07:38:49,397 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 07:38:49,547 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 557 trivial. 0 not checked. [2023-11-23 07:38:49,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:38:49,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958922291] [2023-11-23 07:38:49,547 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:38:49,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373402691] [2023-11-23 07:38:49,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373402691] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 07:38:49,547 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 07:38:49,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 14 [2023-11-23 07:38:49,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112193106] [2023-11-23 07:38:49,548 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 07:38:49,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-23 07:38:49,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:38:49,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-23 07:38:49,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2023-11-23 07:38:49,549 INFO L87 Difference]: Start difference. First operand 233 states and 309 transitions. Second operand has 14 states, 13 states have (on average 4.615384615384615) internal successors, (60), 14 states have internal predecessors, (60), 4 states have call successors, (24), 2 states have call predecessors, (24), 5 states have return successors, (25), 4 states have call predecessors, (25), 3 states have call successors, (25) [2023-11-23 07:38:50,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:38:50,418 INFO L93 Difference]: Finished difference Result 391 states and 569 transitions. [2023-11-23 07:38:50,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-23 07:38:50,418 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.615384615384615) internal successors, (60), 14 states have internal predecessors, (60), 4 states have call successors, (24), 2 states have call predecessors, (24), 5 states have return successors, (25), 4 states have call predecessors, (25), 3 states have call successors, (25) Word has length 157 [2023-11-23 07:38:50,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:38:50,419 INFO L225 Difference]: With dead ends: 391 [2023-11-23 07:38:50,420 INFO L226 Difference]: Without dead ends: 258 [2023-11-23 07:38:50,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 300 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2023-11-23 07:38:50,421 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 27 mSDsluCounter, 1851 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 2060 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-23 07:38:50,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 2060 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-23 07:38:50,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2023-11-23 07:38:50,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 244. [2023-11-23 07:38:50,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 159 states have (on average 1.2389937106918238) internal successors, (197), 164 states have internal predecessors, (197), 62 states have call successors, (62), 20 states have call predecessors, (62), 22 states have return successors, (66), 59 states have call predecessors, (66), 59 states have call successors, (66) [2023-11-23 07:38:50,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 325 transitions. [2023-11-23 07:38:50,436 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 325 transitions. Word has length 157 [2023-11-23 07:38:50,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:38:50,436 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 325 transitions. [2023-11-23 07:38:50,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.615384615384615) internal successors, (60), 14 states have internal predecessors, (60), 4 states have call successors, (24), 2 states have call predecessors, (24), 5 states have return successors, (25), 4 states have call predecessors, (25), 3 states have call successors, (25) [2023-11-23 07:38:50,436 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 325 transitions. [2023-11-23 07:38:50,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2023-11-23 07:38:50,437 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:38:50,437 INFO L195 NwaCegarLoop]: trace histogram [22, 12, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 07:38:50,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-23 07:38:50,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:38:50,643 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:38:50,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:38:50,644 INFO L85 PathProgramCache]: Analyzing trace with hash 2130834304, now seen corresponding path program 1 times [2023-11-23 07:38:50,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:38:50,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611651675] [2023-11-23 07:38:50,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:38:50,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:38:50,700 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:38:50,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [355305974] [2023-11-23 07:38:50,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:38:50,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:38:50,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:38:50,702 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 07:38:50,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-23 07:38:51,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:38:51,968 INFO L262 TraceCheckSpWp]: Trace formula consists of 3013 conjuncts, 96 conjunts are in the unsatisfiable core [2023-11-23 07:38:51,974 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:38:52,008 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 15 treesize of output 1 [2023-11-23 07:38:52,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:38:52,045 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 33 [2023-11-23 07:38:52,102 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 121 treesize of output 101 [2023-11-23 07:38:52,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:38:52,114 INFO L349 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2023-11-23 07:38:52,115 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 101 treesize of output 136 [2023-11-23 07:38:52,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:38:52,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:38:52,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:38:52,231 INFO L349 Elim1Store]: treesize reduction 46, result has 27.0 percent of original size [2023-11-23 07:38:52,232 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 106 treesize of output 76 [2023-11-23 07:38:52,394 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 121 treesize of output 101 [2023-11-23 07:38:52,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:38:52,404 INFO L349 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2023-11-23 07:38:52,405 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 101 treesize of output 136 [2023-11-23 07:38:52,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:38:52,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:38:52,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:38:52,484 INFO L349 Elim1Store]: treesize reduction 46, result has 27.0 percent of original size [2023-11-23 07:38:52,485 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 141 treesize of output 101 [2023-11-23 07:38:52,675 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 121 treesize of output 101 [2023-11-23 07:38:52,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:38:52,686 INFO L349 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2023-11-23 07:38:52,687 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 101 treesize of output 136 [2023-11-23 07:38:52,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:38:52,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:38:52,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:38:52,734 INFO L349 Elim1Store]: treesize reduction 46, result has 27.0 percent of original size [2023-11-23 07:38:52,735 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 141 treesize of output 101 [2023-11-23 07:38:52,903 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 121 treesize of output 101 [2023-11-23 07:38:52,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:38:52,913 INFO L349 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2023-11-23 07:38:52,913 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 101 treesize of output 136 [2023-11-23 07:38:52,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:38:52,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:38:52,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:38:52,989 INFO L349 Elim1Store]: treesize reduction 46, result has 27.0 percent of original size [2023-11-23 07:38:52,989 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 106 treesize of output 76 [2023-11-23 07:38:53,181 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 121 treesize of output 101 [2023-11-23 07:38:53,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:38:53,191 INFO L349 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2023-11-23 07:38:53,192 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 101 treesize of output 136 [2023-11-23 07:38:53,205 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 10 [2023-11-23 07:38:53,477 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 121 treesize of output 101 [2023-11-23 07:38:53,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:38:53,489 INFO L349 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2023-11-23 07:38:53,490 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 101 treesize of output 136 [2023-11-23 07:38:53,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:38:53,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:38:53,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:38:53,632 INFO L349 Elim1Store]: treesize reduction 46, result has 27.0 percent of original size [2023-11-23 07:38:53,633 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 60 treesize of output 36 [2023-11-23 07:38:53,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:38:53,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:38:53,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:38:53,677 INFO L349 Elim1Store]: treesize reduction 46, result has 27.0 percent of original size [2023-11-23 07:38:53,677 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 64 treesize of output 40 [2023-11-23 07:38:53,739 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 121 treesize of output 101 [2023-11-23 07:38:53,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:38:53,749 INFO L349 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2023-11-23 07:38:53,750 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 101 treesize of output 136 [2023-11-23 07:38:53,761 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 34 [2023-11-23 07:38:53,997 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 121 treesize of output 101 [2023-11-23 07:38:54,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:38:54,008 INFO L349 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2023-11-23 07:38:54,009 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 101 treesize of output 136 [2023-11-23 07:38:54,025 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 34 [2023-11-23 07:38:54,246 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 121 treesize of output 101 [2023-11-23 07:38:54,256 INFO L349 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2023-11-23 07:38:54,256 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 101 treesize of output 136 [2023-11-23 07:38:54,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:38:54,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:38:54,390 INFO L349 Elim1Store]: treesize reduction 46, result has 27.0 percent of original size [2023-11-23 07:38:54,391 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 106 treesize of output 76 [2023-11-23 07:38:58,328 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 146 proven. 54 refuted. 0 times theorem prover too weak. 359 trivial. 0 not checked. [2023-11-23 07:38:58,329 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 07:38:58,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:38:58,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611651675] [2023-11-23 07:38:58,989 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:38:58,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355305974] [2023-11-23 07:38:58,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355305974] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 07:38:58,990 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-23 07:38:58,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2023-11-23 07:38:58,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179020689] [2023-11-23 07:38:58,990 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-23 07:38:58,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-23 07:38:58,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:38:58,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-23 07:38:58,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=524, Unknown=2, NotChecked=0, Total=600 [2023-11-23 07:38:58,992 INFO L87 Difference]: Start difference. First operand 244 states and 325 transitions. Second operand has 18 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 6 states have call successors, (25), 4 states have call predecessors, (25), 5 states have return successors, (24), 6 states have call predecessors, (24), 5 states have call successors, (24) [2023-11-23 07:39:01,886 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 07:39:03,959 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-23 07:39:06,181 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 07:39:08,294 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 07:39:10,582 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 07:39:13,742 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 07:39:16,000 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 07:39:18,030 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 07:39:20,108 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 07:39:22,276 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 07:39:24,377 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] Killed by 15