./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/aws-c-common/aws_priority_queue_size_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_size_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 1baae56bade188786b6c048f5a5545dd6165460ea50e58a0310e4360c89d1838 --preprocessor.use.memory.slicer true --- Real Ultimate output --- This is Ultimate 0.2.3-?-abd6749-m [2023-11-23 07:40:17,519 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 07:40:17,593 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2023-11-23 07:40:17,616 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 07:40:17,616 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 07:40:17,629 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 07:40:17,630 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 07:40:17,630 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 07:40:17,630 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-23 07:40:17,631 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-23 07:40:17,631 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 07:40:17,631 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 07:40:17,632 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 07:40:17,632 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 07:40:17,632 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 07:40:17,632 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 07:40:17,633 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 07:40:17,633 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 07:40:17,633 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 07:40:17,633 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 07:40:17,634 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 07:40:17,637 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 07:40:17,637 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 07:40:17,637 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 07:40:17,640 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 07:40:17,640 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 07:40:17,641 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 07:40:17,641 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 07:40:17,641 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 07:40:17,641 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 07:40:17,642 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 07:40:17,642 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 07:40:17,642 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 07:40:17,643 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 07:40:17,643 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 07:40:17,643 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 07:40:17,643 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 07:40:17,643 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 07:40:17,643 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 07:40:17,644 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1baae56bade188786b6c048f5a5545dd6165460ea50e58a0310e4360c89d1838 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.preprocessor: Use memory slicer -> true [2023-11-23 07:40:17,836 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 07:40:17,853 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 07:40:17,856 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 07:40:17,856 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 07:40:17,858 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 07:40:17,858 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/aws-c-common/aws_priority_queue_size_harness.i [2023-11-23 07:40:19,050 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 07:40:19,397 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 07:40:19,398 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/aws-c-common/aws_priority_queue_size_harness.i [2023-11-23 07:40:19,429 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5db01f98a/f76bdbc1e6544617bd94dcbfb88cac97/FLAG00e21a901 [2023-11-23 07:40:19,446 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5db01f98a/f76bdbc1e6544617bd94dcbfb88cac97 [2023-11-23 07:40:19,449 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 07:40:19,451 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 07:40:19,454 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 07:40:19,454 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 07:40:19,458 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 07:40:19,459 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 07:40:19" (1/1) ... [2023-11-23 07:40:19,460 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@763d1bd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:40:19, skipping insertion in model container [2023-11-23 07:40:19,460 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 07:40:19" (1/1) ... [2023-11-23 07:40:19,527 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 07:40:19,747 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_size_harness.i[4497,4510] [2023-11-23 07:40:19,756 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_size_harness.i[4557,4570] [2023-11-23 07:40:20,423 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:40:20,424 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:40:20,424 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:40:20,424 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:40:20,425 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:40:20,431 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:40:20,432 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:40:20,433 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:40:20,433 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:40:20,752 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-23 07:40:20,753 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-23 07:40:20,753 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-23 07:40:20,755 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-23 07:40:20,760 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-23 07:40:20,760 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-23 07:40:20,761 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-23 07:40:20,762 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-23 07:40:20,763 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-23 07:40:20,764 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-23 07:40:20,840 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:40:20,840 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:40:20,894 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 07:40:20,975 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 07:40:20,995 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_size_harness.i[4497,4510] [2023-11-23 07:40:20,995 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_size_harness.i[4557,4570] [2023-11-23 07:40:21,094 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:40:21,108 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:40:21,108 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:40:21,109 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:40:21,109 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:40:21,112 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:40:21,113 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:40:21,113 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:40:21,114 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:40:21,145 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-23 07:40:21,146 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-23 07:40:21,146 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-23 07:40:21,146 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-23 07:40:21,147 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-23 07:40:21,147 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-23 07:40:21,148 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-23 07:40:21,148 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-23 07:40:21,148 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-23 07:40:21,148 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-23 07:40:21,163 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:40:21,164 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:40:21,183 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : : "r"(pBuf) : "memory"); [7703-7714] [2023-11-23 07:40:21,192 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 07:40:21,317 WARN L675 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 07:40:21,317 WARN L675 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 07:40:21,317 WARN L675 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 07:40:21,317 WARN L675 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 07:40:21,317 WARN L675 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 07:40:21,318 WARN L675 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 07:40:21,318 WARN L675 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 07:40:21,318 WARN L675 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 07:40:21,318 WARN L675 CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 07:40:21,318 WARN L675 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 07:40:21,319 WARN L675 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 07:40:21,319 WARN L675 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 07:40:21,319 WARN L675 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 07:40:21,319 WARN L675 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 07:40:21,320 WARN L675 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 07:40:21,326 INFO L206 MainTranslator]: Completed translation [2023-11-23 07:40:21,326 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:40:21 WrapperNode [2023-11-23 07:40:21,326 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 07:40:21,327 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 07:40:21,329 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 07:40:21,329 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 07:40:21,335 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:40:21" (1/1) ... [2023-11-23 07:40:21,397 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:40:21" (1/1) ... [2023-11-23 07:40:21,465 INFO L138 Inliner]: procedures = 688, calls = 1532, calls flagged for inlining = 55, calls inlined = 10, statements flattened = 666 [2023-11-23 07:40:21,471 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 07:40:21,472 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 07:40:21,472 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 07:40:21,472 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 07:40:21,481 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:40:21" (1/1) ... [2023-11-23 07:40:21,482 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:40:21" (1/1) ... [2023-11-23 07:40:21,493 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:40:21" (1/1) ... [2023-11-23 07:40:21,579 INFO L188 MemorySlicer]: Split 323 memory accesses to 7 slices as follows [2, 66, 236, 6, 3, 7, 3]. 73 percent of accesses are in the largest equivalence class. The 257 initializations are split as follows [2, 10, 236, 0, 1, 5, 3]. The 7 writes are split as follows [0, 4, 0, 2, 1, 0, 0]. [2023-11-23 07:40:21,581 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:40:21" (1/1) ... [2023-11-23 07:40:21,581 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:40:21" (1/1) ... [2023-11-23 07:40:21,614 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:40:21" (1/1) ... [2023-11-23 07:40:21,629 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:40:21" (1/1) ... [2023-11-23 07:40:21,635 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:40:21" (1/1) ... [2023-11-23 07:40:21,651 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:40:21" (1/1) ... [2023-11-23 07:40:21,659 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 07:40:21,664 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 07:40:21,665 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 07:40:21,665 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 07:40:21,665 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:40:21" (1/1) ... [2023-11-23 07:40:21,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 07:40:21,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:40:21,698 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 07:40:21,752 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 07:40:21,835 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2023-11-23 07:40:21,835 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2023-11-23 07:40:21,835 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 07:40:21,836 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_bounded [2023-11-23 07:40:21,836 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_bounded [2023-11-23 07:40:21,837 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_valid [2023-11-23 07:40:21,837 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_valid [2023-11-23 07:40:21,837 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2023-11-23 07:40:21,837 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2023-11-23 07:40:21,837 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-23 07:40:21,837 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-23 07:40:21,837 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-23 07:40:21,837 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-23 07:40:21,837 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-23 07:40:21,837 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2023-11-23 07:40:21,838 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2023-11-23 07:40:21,838 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2023-11-23 07:40:21,838 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2023-11-23 07:40:21,838 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-23 07:40:21,838 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-23 07:40:21,839 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 07:40:21,839 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 07:40:21,839 INFO L130 BoogieDeclarations]: Found specification of procedure save_byte_from_array [2023-11-23 07:40:21,839 INFO L138 BoogieDeclarations]: Found implementation of procedure save_byte_from_array [2023-11-23 07:40:21,839 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-23 07:40:21,839 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-23 07:40:21,839 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-23 07:40:21,839 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2023-11-23 07:40:21,839 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#4 [2023-11-23 07:40:21,840 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#5 [2023-11-23 07:40:21,840 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#6 [2023-11-23 07:40:21,840 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 07:40:21,840 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 07:40:21,840 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2023-11-23 07:40:21,841 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2023-11-23 07:40:21,841 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2023-11-23 07:40:21,841 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2023-11-23 07:40:21,841 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2023-11-23 07:40:21,841 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2023-11-23 07:40:21,841 INFO L130 BoogieDeclarations]: Found specification of procedure aws_priority_queue_is_valid [2023-11-23 07:40:21,842 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_priority_queue_is_valid [2023-11-23 07:40:21,842 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_length [2023-11-23 07:40:21,842 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_length [2023-11-23 07:40:21,842 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-23 07:40:21,842 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-23 07:40:21,842 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 07:40:21,842 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-23 07:40:21,842 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-23 07:40:21,843 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-23 07:40:21,843 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2023-11-23 07:40:21,843 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#4 [2023-11-23 07:40:21,843 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#5 [2023-11-23 07:40:21,843 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#6 [2023-11-23 07:40:21,843 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2023-11-23 07:40:21,843 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2023-11-23 07:40:21,844 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2023-11-23 07:40:21,844 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2023-11-23 07:40:21,844 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#4 [2023-11-23 07:40:21,844 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#5 [2023-11-23 07:40:21,844 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#6 [2023-11-23 07:40:21,844 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2023-11-23 07:40:21,844 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2023-11-23 07:40:21,844 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2023-11-23 07:40:21,845 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2023-11-23 07:40:21,845 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-23 07:40:21,845 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-23 07:40:21,845 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-23 07:40:21,845 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-23 07:40:21,845 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-23 07:40:21,845 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2023-11-23 07:40:21,845 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2023-11-23 07:40:21,845 INFO L130 BoogieDeclarations]: Found specification of procedure assert_array_list_equivalence [2023-11-23 07:40:21,846 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_array_list_equivalence [2023-11-23 07:40:21,846 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_array_list_has_allocated_data_member [2023-11-23 07:40:21,846 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_array_list_has_allocated_data_member [2023-11-23 07:40:21,847 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-23 07:40:21,847 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-23 07:40:21,847 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-23 07:40:21,847 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-23 07:40:21,847 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-23 07:40:21,847 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-11-23 07:40:21,847 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2023-11-23 07:40:22,105 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 07:40:22,107 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 07:40:22,590 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 07:40:22,698 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 07:40:22,698 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-23 07:40:22,699 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 07:40:22 BoogieIcfgContainer [2023-11-23 07:40:22,699 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 07:40:22,700 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 07:40:22,701 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 07:40:22,703 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 07:40:22,703 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 07:40:19" (1/3) ... [2023-11-23 07:40:22,704 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55c466a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 07:40:22, skipping insertion in model container [2023-11-23 07:40:22,704 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:40:21" (2/3) ... [2023-11-23 07:40:22,704 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55c466a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 07:40:22, skipping insertion in model container [2023-11-23 07:40:22,704 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 07:40:22" (3/3) ... [2023-11-23 07:40:22,705 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_priority_queue_size_harness.i [2023-11-23 07:40:22,717 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 07:40:22,717 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 07:40:22,750 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 07:40:22,755 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;@27fa4f3d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 07:40:22,756 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 07:40:22,759 INFO L276 IsEmpty]: Start isEmpty. Operand has 153 states, 95 states have (on average 1.2736842105263158) internal successors, (121), 96 states have internal predecessors, (121), 39 states have call successors, (39), 17 states have call predecessors, (39), 17 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2023-11-23 07:40:22,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-11-23 07:40:22,768 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:40:22,768 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 07:40:22,769 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:40:22,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:40:22,772 INFO L85 PathProgramCache]: Analyzing trace with hash 23292969, now seen corresponding path program 1 times [2023-11-23 07:40:22,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:40:22,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208241370] [2023-11-23 07:40:22,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:40:22,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:40:23,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:40:23,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 07:40:23,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:40:23,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-23 07:40:23,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:40:23,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 07:40:23,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:40:23,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-23 07:40:23,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:40:23,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 07:40:23,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:40:23,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 07:40:23,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:40:23,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-23 07:40:23,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:40:23,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 07:40:23,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:40:23,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 07:40:23,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:40:23,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-11-23 07:40:23,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:40:23,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-23 07:40:23,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:40:23,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-11-23 07:40:23,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:40:23,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2023-11-23 07:40:23,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:40:23,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2023-11-23 07:40:23,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:40:23,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2023-11-23 07:40:23,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:40:23,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2023-11-23 07:40:23,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:40:23,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-11-23 07:40:23,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:40:23,648 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-11-23 07:40:23,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:40:23,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208241370] [2023-11-23 07:40:23,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208241370] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 07:40:23,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 07:40:23,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 07:40:23,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600152637] [2023-11-23 07:40:23,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 07:40:23,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 07:40:23,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:40:23,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 07:40:23,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-23 07:40:23,675 INFO L87 Difference]: Start difference. First operand has 153 states, 95 states have (on average 1.2736842105263158) internal successors, (121), 96 states have internal predecessors, (121), 39 states have call successors, (39), 17 states have call predecessors, (39), 17 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 2 states have internal predecessors, (35), 2 states have call successors, (17), 5 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2023-11-23 07:40:24,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:40:24,589 INFO L93 Difference]: Finished difference Result 363 states and 528 transitions. [2023-11-23 07:40:24,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 07:40:24,591 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 2 states have internal predecessors, (35), 2 states have call successors, (17), 5 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 100 [2023-11-23 07:40:24,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:40:24,598 INFO L225 Difference]: With dead ends: 363 [2023-11-23 07:40:24,599 INFO L226 Difference]: Without dead ends: 216 [2023-11-23 07:40:24,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-23 07:40:24,604 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 130 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-23 07:40:24,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 219 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-23 07:40:24,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2023-11-23 07:40:24,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 151. [2023-11-23 07:40:24,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 94 states have (on average 1.2446808510638299) internal successors, (117), 95 states have internal predecessors, (117), 39 states have call successors, (39), 17 states have call predecessors, (39), 17 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2023-11-23 07:40:24,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 194 transitions. [2023-11-23 07:40:24,651 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 194 transitions. Word has length 100 [2023-11-23 07:40:24,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:40:24,651 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 194 transitions. [2023-11-23 07:40:24,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 2 states have internal predecessors, (35), 2 states have call successors, (17), 5 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2023-11-23 07:40:24,652 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 194 transitions. [2023-11-23 07:40:24,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-11-23 07:40:24,655 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:40:24,655 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 07:40:24,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 07:40:24,655 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:40:24,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:40:24,656 INFO L85 PathProgramCache]: Analyzing trace with hash -751930639, now seen corresponding path program 1 times [2023-11-23 07:40:24,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:40:24,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858983186] [2023-11-23 07:40:24,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:40:24,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:40:24,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:40:24,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 07:40:24,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:40:24,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-23 07:40:24,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:40:24,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 07:40:24,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:40:25,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-23 07:40:25,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:40:25,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 07:40:25,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:40:25,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 07:40:25,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:40:25,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-23 07:40:25,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:40:25,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 07:40:25,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:40:25,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 07:40:25,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:40:25,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-11-23 07:40:25,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:40:25,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-23 07:40:25,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:40:25,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-11-23 07:40:25,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:40:25,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2023-11-23 07:40:25,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:40:25,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2023-11-23 07:40:25,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:40:25,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2023-11-23 07:40:25,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:40:25,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2023-11-23 07:40:25,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:40:25,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-11-23 07:40:25,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:40:25,394 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-11-23 07:40:25,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:40:25,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858983186] [2023-11-23 07:40:25,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858983186] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 07:40:25,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 07:40:25,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-23 07:40:25,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263743254] [2023-11-23 07:40:25,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 07:40:25,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 07:40:25,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:40:25,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 07:40:25,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-23 07:40:25,397 INFO L87 Difference]: Start difference. First operand 151 states and 194 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 5 states have internal predecessors, (35), 3 states have call successors, (17), 5 states have call predecessors, (17), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-11-23 07:40:26,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:40:26,845 INFO L93 Difference]: Finished difference Result 332 states and 451 transitions. [2023-11-23 07:40:26,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-23 07:40:26,846 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 5 states have internal predecessors, (35), 3 states have call successors, (17), 5 states have call predecessors, (17), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 100 [2023-11-23 07:40:26,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:40:26,848 INFO L225 Difference]: With dead ends: 332 [2023-11-23 07:40:26,848 INFO L226 Difference]: Without dead ends: 216 [2023-11-23 07:40:26,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-11-23 07:40:26,849 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 182 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-23 07:40:26,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 445 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 701 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-23 07:40:26,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2023-11-23 07:40:26,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 151. [2023-11-23 07:40:26,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 94 states have (on average 1.2340425531914894) internal successors, (116), 95 states have internal predecessors, (116), 39 states have call successors, (39), 17 states have call predecessors, (39), 17 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2023-11-23 07:40:26,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 193 transitions. [2023-11-23 07:40:26,874 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 193 transitions. Word has length 100 [2023-11-23 07:40:26,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:40:26,874 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 193 transitions. [2023-11-23 07:40:26,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 5 states have internal predecessors, (35), 3 states have call successors, (17), 5 states have call predecessors, (17), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-11-23 07:40:26,874 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 193 transitions. [2023-11-23 07:40:26,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-11-23 07:40:26,876 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:40:26,876 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 07:40:26,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 07:40:26,876 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:40:26,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:40:26,877 INFO L85 PathProgramCache]: Analyzing trace with hash 974061899, now seen corresponding path program 1 times [2023-11-23 07:40:26,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:40:26,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912495646] [2023-11-23 07:40:26,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:40:26,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:40:26,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:40:27,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 07:40:27,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:40:27,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-23 07:40:27,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:40:27,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 07:40:27,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:40:27,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-23 07:40:27,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:40:27,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 07:40:27,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:40:27,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 07:40:27,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:40:27,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-23 07:40:27,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:40:27,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 07:40:27,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:40:27,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 07:40:27,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:40:27,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-11-23 07:40:27,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:40:27,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-23 07:40:27,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:40:27,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2023-11-23 07:40:27,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:40:27,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2023-11-23 07:40:27,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:40:27,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2023-11-23 07:40:27,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:40:27,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2023-11-23 07:40:27,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:40:27,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2023-11-23 07:40:27,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:40:27,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2023-11-23 07:40:27,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:40:27,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2023-11-23 07:40:27,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:40:27,838 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2023-11-23 07:40:27,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:40:27,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912495646] [2023-11-23 07:40:27,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912495646] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 07:40:27,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381017891] [2023-11-23 07:40:27,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:40:27,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:40:27,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:40:27,840 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 07:40:27,846 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 07:40:28,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:40:28,297 INFO L262 TraceCheckSpWp]: Trace formula consists of 2758 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 07:40:28,305 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:40:28,396 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-23 07:40:28,396 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 07:40:28,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381017891] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 07:40:28,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 07:40:28,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 16 [2023-11-23 07:40:28,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727281260] [2023-11-23 07:40:28,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 07:40:28,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 07:40:28,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:40:28,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 07:40:28,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2023-11-23 07:40:28,399 INFO L87 Difference]: Start difference. First operand 151 states and 193 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2023-11-23 07:40:28,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:40:28,735 INFO L93 Difference]: Finished difference Result 286 states and 373 transitions. [2023-11-23 07:40:28,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 07:40:28,736 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 108 [2023-11-23 07:40:28,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:40:28,737 INFO L225 Difference]: With dead ends: 286 [2023-11-23 07:40:28,737 INFO L226 Difference]: Without dead ends: 153 [2023-11-23 07:40:28,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2023-11-23 07:40:28,738 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 81 mSDsluCounter, 740 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 900 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 07:40:28,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 900 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 07:40:28,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2023-11-23 07:40:28,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2023-11-23 07:40:28,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 95 states have (on average 1.231578947368421) internal successors, (117), 97 states have internal predecessors, (117), 39 states have call successors, (39), 17 states have call predecessors, (39), 18 states have return successors, (41), 38 states have call predecessors, (41), 38 states have call successors, (41) [2023-11-23 07:40:28,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 197 transitions. [2023-11-23 07:40:28,776 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 197 transitions. Word has length 108 [2023-11-23 07:40:28,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:40:28,777 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 197 transitions. [2023-11-23 07:40:28,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2023-11-23 07:40:28,777 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 197 transitions. [2023-11-23 07:40:28,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-11-23 07:40:28,779 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:40:28,779 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 07:40:28,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 07:40:29,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:40:29,009 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:40:29,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:40:29,010 INFO L85 PathProgramCache]: Analyzing trace with hash -154131305, now seen corresponding path program 1 times [2023-11-23 07:40:29,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:40:29,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483032825] [2023-11-23 07:40:29,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:40:29,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:40:29,194 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:40:29,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2083366612] [2023-11-23 07:40:29,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:40:29,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:40:29,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:40:29,196 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 07:40:29,227 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 07:40:29,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:40:29,707 INFO L262 TraceCheckSpWp]: Trace formula consists of 2940 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 07:40:29,712 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:40:29,745 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-11-23 07:40:29,745 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 07:40:29,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:40:29,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483032825] [2023-11-23 07:40:29,746 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:40:29,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083366612] [2023-11-23 07:40:29,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083366612] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 07:40:29,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 07:40:29,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 07:40:29,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178071893] [2023-11-23 07:40:29,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 07:40:29,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 07:40:29,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:40:29,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 07:40:29,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 07:40:29,755 INFO L87 Difference]: Start difference. First operand 153 states and 197 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2023-11-23 07:40:30,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:40:30,067 INFO L93 Difference]: Finished difference Result 274 states and 361 transitions. [2023-11-23 07:40:30,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 07:40:30,067 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 121 [2023-11-23 07:40:30,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:40:30,068 INFO L225 Difference]: With dead ends: 274 [2023-11-23 07:40:30,069 INFO L226 Difference]: Without dead ends: 158 [2023-11-23 07:40:30,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 07:40:30,070 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 10 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 07:40:30,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 524 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 07:40:30,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2023-11-23 07:40:30,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 155. [2023-11-23 07:40:30,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 97 states have (on average 1.2268041237113403) internal successors, (119), 99 states have internal predecessors, (119), 39 states have call successors, (39), 17 states have call predecessors, (39), 18 states have return successors, (41), 38 states have call predecessors, (41), 38 states have call successors, (41) [2023-11-23 07:40:30,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 199 transitions. [2023-11-23 07:40:30,083 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 199 transitions. Word has length 121 [2023-11-23 07:40:30,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:40:30,083 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 199 transitions. [2023-11-23 07:40:30,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2023-11-23 07:40:30,083 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 199 transitions. [2023-11-23 07:40:30,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-11-23 07:40:30,085 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:40:30,085 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 07:40:30,102 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 07:40:30,300 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,SelfDestructingSolverStorable3 [2023-11-23 07:40:30,300 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:40:30,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:40:30,301 INFO L85 PathProgramCache]: Analyzing trace with hash -587860391, now seen corresponding path program 1 times [2023-11-23 07:40:30,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:40:30,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033509655] [2023-11-23 07:40:30,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:40:30,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:40:30,352 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:40:30,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1168427118] [2023-11-23 07:40:30,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:40:30,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:40:30,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:40:30,353 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 07:40:30,371 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 07:40:30,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:40:30,862 INFO L262 TraceCheckSpWp]: Trace formula consists of 2945 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 07:40:30,866 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:40:31,022 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-23 07:40:31,022 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 07:40:31,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:40:31,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033509655] [2023-11-23 07:40:31,022 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:40:31,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168427118] [2023-11-23 07:40:31,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168427118] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 07:40:31,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 07:40:31,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 07:40:31,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747204471] [2023-11-23 07:40:31,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 07:40:31,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 07:40:31,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:40:31,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 07:40:31,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 07:40:31,024 INFO L87 Difference]: Start difference. First operand 155 states and 199 transitions. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2023-11-23 07:40:31,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:40:31,375 INFO L93 Difference]: Finished difference Result 276 states and 355 transitions. [2023-11-23 07:40:31,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 07:40:31,376 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 121 [2023-11-23 07:40:31,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:40:31,377 INFO L225 Difference]: With dead ends: 276 [2023-11-23 07:40:31,377 INFO L226 Difference]: Without dead ends: 155 [2023-11-23 07:40:31,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-23 07:40:31,378 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 48 mSDsluCounter, 598 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 762 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 07:40:31,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 762 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 07:40:31,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2023-11-23 07:40:31,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2023-11-23 07:40:31,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 97 states have (on average 1.2164948453608246) internal successors, (118), 99 states have internal predecessors, (118), 39 states have call successors, (39), 17 states have call predecessors, (39), 18 states have return successors, (41), 38 states have call predecessors, (41), 38 states have call successors, (41) [2023-11-23 07:40:31,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 198 transitions. [2023-11-23 07:40:31,390 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 198 transitions. Word has length 121 [2023-11-23 07:40:31,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:40:31,390 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 198 transitions. [2023-11-23 07:40:31,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2023-11-23 07:40:31,390 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 198 transitions. [2023-11-23 07:40:31,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-11-23 07:40:31,391 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:40:31,391 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 07:40:31,407 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 07:40:31,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:40:31,607 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:40:31,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:40:31,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1552648820, now seen corresponding path program 1 times [2023-11-23 07:40:31,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:40:31,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71206748] [2023-11-23 07:40:31,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:40:31,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:40:31,686 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:40:31,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1202801527] [2023-11-23 07:40:31,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:40:31,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:40:31,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:40:31,688 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 07:40:31,713 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 07:40:32,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:40:32,169 INFO L262 TraceCheckSpWp]: Trace formula consists of 3062 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 07:40:32,173 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:40:32,184 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-11-23 07:40:32,184 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 07:40:32,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:40:32,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71206748] [2023-11-23 07:40:32,184 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:40:32,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202801527] [2023-11-23 07:40:32,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202801527] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 07:40:32,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 07:40:32,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 07:40:32,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181142721] [2023-11-23 07:40:32,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 07:40:32,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 07:40:32,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:40:32,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 07:40:32,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 07:40:32,187 INFO L87 Difference]: Start difference. First operand 155 states and 198 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-11-23 07:40:32,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:40:32,362 INFO L93 Difference]: Finished difference Result 277 states and 356 transitions. [2023-11-23 07:40:32,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 07:40:32,363 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 137 [2023-11-23 07:40:32,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:40:32,364 INFO L225 Difference]: With dead ends: 277 [2023-11-23 07:40:32,364 INFO L226 Difference]: Without dead ends: 159 [2023-11-23 07:40:32,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 07:40:32,365 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 3 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 07:40:32,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 518 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 07:40:32,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2023-11-23 07:40:32,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 157. [2023-11-23 07:40:32,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 99 states have (on average 1.2121212121212122) internal successors, (120), 101 states have internal predecessors, (120), 39 states have call successors, (39), 17 states have call predecessors, (39), 18 states have return successors, (41), 38 states have call predecessors, (41), 38 states have call successors, (41) [2023-11-23 07:40:32,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 200 transitions. [2023-11-23 07:40:32,375 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 200 transitions. Word has length 137 [2023-11-23 07:40:32,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:40:32,375 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 200 transitions. [2023-11-23 07:40:32,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-11-23 07:40:32,376 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 200 transitions. [2023-11-23 07:40:32,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-11-23 07:40:32,377 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:40:32,377 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 07:40:32,392 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 07:40:32,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:40:32,592 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:40:32,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:40:32,593 INFO L85 PathProgramCache]: Analyzing trace with hash -676629814, now seen corresponding path program 1 times [2023-11-23 07:40:32,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:40:32,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259945260] [2023-11-23 07:40:32,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:40:32,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:40:32,638 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:40:32,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1845056723] [2023-11-23 07:40:32,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:40:32,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:40:32,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:40:32,640 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 07:40:32,679 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 07:40:33,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:40:33,158 INFO L262 TraceCheckSpWp]: Trace formula consists of 3057 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-23 07:40:33,162 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:40:33,226 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-23 07:40:33,226 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 07:40:33,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:40:33,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259945260] [2023-11-23 07:40:33,227 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:40:33,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845056723] [2023-11-23 07:40:33,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845056723] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 07:40:33,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 07:40:33,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-23 07:40:33,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130250717] [2023-11-23 07:40:33,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 07:40:33,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 07:40:33,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:40:33,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 07:40:33,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-23 07:40:33,229 INFO L87 Difference]: Start difference. First operand 157 states and 200 transitions. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 5 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2023-11-23 07:40:33,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:40:33,659 INFO L93 Difference]: Finished difference Result 295 states and 378 transitions. [2023-11-23 07:40:33,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 07:40:33,660 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 5 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 137 [2023-11-23 07:40:33,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:40:33,661 INFO L225 Difference]: With dead ends: 295 [2023-11-23 07:40:33,661 INFO L226 Difference]: Without dead ends: 157 [2023-11-23 07:40:33,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-11-23 07:40:33,662 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 99 mSDsluCounter, 848 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 1001 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 07:40:33,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 1001 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 07:40:33,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2023-11-23 07:40:33,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2023-11-23 07:40:33,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 99 states have (on average 1.2121212121212122) internal successors, (120), 101 states have internal predecessors, (120), 39 states have call successors, (39), 17 states have call predecessors, (39), 18 states have return successors, (40), 38 states have call predecessors, (40), 38 states have call successors, (40) [2023-11-23 07:40:33,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 199 transitions. [2023-11-23 07:40:33,671 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 199 transitions. Word has length 137 [2023-11-23 07:40:33,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:40:33,672 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 199 transitions. [2023-11-23 07:40:33,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 5 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2023-11-23 07:40:33,672 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 199 transitions. [2023-11-23 07:40:33,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2023-11-23 07:40:33,673 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:40:33,673 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 07:40:33,703 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 07:40:33,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:40:33,889 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:40:33,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:40:33,889 INFO L85 PathProgramCache]: Analyzing trace with hash 987098430, now seen corresponding path program 2 times [2023-11-23 07:40:33,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:40:33,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282235786] [2023-11-23 07:40:33,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:40:33,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:40:33,938 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:40:33,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [548504102] [2023-11-23 07:40:33,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 07:40:33,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:40:33,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:40:33,940 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 07:40:33,965 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 07:40:34,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 07:40:34,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 07:40:34,629 INFO L262 TraceCheckSpWp]: Trace formula consists of 3244 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-23 07:40:34,634 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:40:34,701 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-11-23 07:40:34,701 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 07:40:34,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:40:34,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282235786] [2023-11-23 07:40:34,701 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:40:34,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548504102] [2023-11-23 07:40:34,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548504102] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 07:40:34,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 07:40:34,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-23 07:40:34,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113483845] [2023-11-23 07:40:34,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 07:40:34,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 07:40:34,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:40:34,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 07:40:34,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-23 07:40:34,704 INFO L87 Difference]: Start difference. First operand 157 states and 199 transitions. Second operand has 8 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 5 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) [2023-11-23 07:40:35,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:40:35,029 INFO L93 Difference]: Finished difference Result 259 states and 325 transitions. [2023-11-23 07:40:35,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 07:40:35,029 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 5 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) Word has length 150 [2023-11-23 07:40:35,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:40:35,030 INFO L225 Difference]: With dead ends: 259 [2023-11-23 07:40:35,030 INFO L226 Difference]: Without dead ends: 155 [2023-11-23 07:40:35,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-11-23 07:40:35,031 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 25 mSDsluCounter, 911 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 1070 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 07:40:35,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 1070 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 07:40:35,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2023-11-23 07:40:35,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2023-11-23 07:40:35,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 98 states have (on average 1.2040816326530612) internal successors, (118), 99 states have internal predecessors, (118), 39 states have call successors, (39), 17 states have call predecessors, (39), 17 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2023-11-23 07:40:35,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 195 transitions. [2023-11-23 07:40:35,041 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 195 transitions. Word has length 150 [2023-11-23 07:40:35,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:40:35,041 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 195 transitions. [2023-11-23 07:40:35,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 5 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) [2023-11-23 07:40:35,041 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 195 transitions. [2023-11-23 07:40:35,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2023-11-23 07:40:35,043 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:40:35,043 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:40:35,059 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 07:40:35,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:40:35,246 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:40:35,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:40:35,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1942233486, now seen corresponding path program 1 times [2023-11-23 07:40:35,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:40:35,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162109740] [2023-11-23 07:40:35,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:40:35,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:40:35,346 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:40:35,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1925118880] [2023-11-23 07:40:35,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:40:35,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:40:35,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:40:35,347 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 07:40:35,360 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 07:40:36,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:40:36,067 INFO L262 TraceCheckSpWp]: Trace formula consists of 3618 conjuncts, 75 conjunts are in the unsatisfiable core [2023-11-23 07:40:36,073 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:40:36,102 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-23 07:40:36,103 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-23 07:40:36,530 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-11-23 07:40:36,531 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 07:40:36,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:40:36,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162109740] [2023-11-23 07:40:36,531 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:40:36,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925118880] [2023-11-23 07:40:36,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925118880] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 07:40:36,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 07:40:36,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-11-23 07:40:36,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175557158] [2023-11-23 07:40:36,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 07:40:36,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-23 07:40:36,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:40:36,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-23 07:40:36,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2023-11-23 07:40:36,533 INFO L87 Difference]: Start difference. First operand 155 states and 195 transitions. Second operand has 14 states, 14 states have (on average 5.785714285714286) internal successors, (81), 14 states have internal predecessors, (81), 7 states have call successors, (24), 3 states have call predecessors, (24), 4 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2023-11-23 07:40:39,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:40:39,097 INFO L93 Difference]: Finished difference Result 295 states and 377 transitions. [2023-11-23 07:40:39,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-23 07:40:39,097 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.785714285714286) internal successors, (81), 14 states have internal predecessors, (81), 7 states have call successors, (24), 3 states have call predecessors, (24), 4 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) Word has length 176 [2023-11-23 07:40:39,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:40:39,098 INFO L225 Difference]: With dead ends: 295 [2023-11-23 07:40:39,098 INFO L226 Difference]: Without dead ends: 177 [2023-11-23 07:40:39,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2023-11-23 07:40:39,099 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 176 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 1556 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 1599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-11-23 07:40:39,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 572 Invalid, 1599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1556 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-11-23 07:40:39,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2023-11-23 07:40:39,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 170. [2023-11-23 07:40:39,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 112 states have (on average 1.2142857142857142) internal successors, (136), 113 states have internal predecessors, (136), 39 states have call successors, (39), 17 states have call predecessors, (39), 18 states have return successors, (42), 39 states have call predecessors, (42), 38 states have call successors, (42) [2023-11-23 07:40:39,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 217 transitions. [2023-11-23 07:40:39,117 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 217 transitions. Word has length 176 [2023-11-23 07:40:39,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:40:39,117 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 217 transitions. [2023-11-23 07:40:39,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.785714285714286) internal successors, (81), 14 states have internal predecessors, (81), 7 states have call successors, (24), 3 states have call predecessors, (24), 4 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2023-11-23 07:40:39,118 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 217 transitions. [2023-11-23 07:40:39,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2023-11-23 07:40:39,123 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:40:39,123 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 07:40:39,140 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 07:40:39,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:40:39,340 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:40:39,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:40:39,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1838447798, now seen corresponding path program 1 times [2023-11-23 07:40:39,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:40:39,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547699994] [2023-11-23 07:40:39,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:40:39,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:40:39,422 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:40:39,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1660403554] [2023-11-23 07:40:39,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:40:39,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:40:39,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:40:39,424 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 07:40:39,458 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 07:40:42,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:40:42,901 INFO L262 TraceCheckSpWp]: Trace formula consists of 3618 conjuncts, 60 conjunts are in the unsatisfiable core [2023-11-23 07:40:42,907 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:40:43,187 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-11-23 07:40:43,187 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 07:40:43,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:40:43,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547699994] [2023-11-23 07:40:43,188 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:40:43,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660403554] [2023-11-23 07:40:43,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660403554] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 07:40:43,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 07:40:43,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-11-23 07:40:43,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992997601] [2023-11-23 07:40:43,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 07:40:43,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-23 07:40:43,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:40:43,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-23 07:40:43,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-11-23 07:40:43,191 INFO L87 Difference]: Start difference. First operand 170 states and 217 transitions. Second operand has 12 states, 12 states have (on average 6.916666666666667) internal successors, (83), 12 states have internal predecessors, (83), 6 states have call successors, (24), 3 states have call predecessors, (24), 4 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2023-11-23 07:40:45,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:40:45,697 INFO L93 Difference]: Finished difference Result 325 states and 421 transitions. [2023-11-23 07:40:45,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-23 07:40:45,698 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.916666666666667) internal successors, (83), 12 states have internal predecessors, (83), 6 states have call successors, (24), 3 states have call predecessors, (24), 4 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) Word has length 178 [2023-11-23 07:40:45,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:40:45,699 INFO L225 Difference]: With dead ends: 325 [2023-11-23 07:40:45,700 INFO L226 Difference]: Without dead ends: 192 [2023-11-23 07:40:45,700 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2023-11-23 07:40:45,700 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 143 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 1500 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 1537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-23 07:40:45,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 490 Invalid, 1537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1500 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-23 07:40:45,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2023-11-23 07:40:45,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 182. [2023-11-23 07:40:45,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 123 states have (on average 1.2276422764227641) internal successors, (151), 124 states have internal predecessors, (151), 39 states have call successors, (39), 17 states have call predecessors, (39), 19 states have return successors, (46), 40 states have call predecessors, (46), 38 states have call successors, (46) [2023-11-23 07:40:45,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 236 transitions. [2023-11-23 07:40:45,714 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 236 transitions. Word has length 178 [2023-11-23 07:40:45,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:40:45,714 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 236 transitions. [2023-11-23 07:40:45,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.916666666666667) internal successors, (83), 12 states have internal predecessors, (83), 6 states have call successors, (24), 3 states have call predecessors, (24), 4 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2023-11-23 07:40:45,715 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 236 transitions. [2023-11-23 07:40:45,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2023-11-23 07:40:45,716 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:40:45,716 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 07:40:45,738 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-23 07:40:45,932 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,SelfDestructingSolverStorable9 [2023-11-23 07:40:45,932 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:40:45,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:40:45,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1414192314, now seen corresponding path program 1 times [2023-11-23 07:40:45,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:40:45,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735327115] [2023-11-23 07:40:45,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:40:45,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:40:46,031 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:40:46,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [392961487] [2023-11-23 07:40:46,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:40:46,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:40:46,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:40:46,044 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 07:40:46,056 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 07:40:47,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:40:47,133 INFO L262 TraceCheckSpWp]: Trace formula consists of 3626 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-23 07:40:47,138 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:40:47,188 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 104 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2023-11-23 07:40:47,188 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 07:40:47,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:40:47,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735327115] [2023-11-23 07:40:47,189 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:40:47,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392961487] [2023-11-23 07:40:47,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392961487] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 07:40:47,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 07:40:47,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 07:40:47,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623702365] [2023-11-23 07:40:47,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 07:40:47,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 07:40:47,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:40:47,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 07:40:47,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 07:40:47,191 INFO L87 Difference]: Start difference. First operand 182 states and 236 transitions. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2023-11-23 07:40:47,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:40:47,488 INFO L93 Difference]: Finished difference Result 332 states and 441 transitions. [2023-11-23 07:40:47,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 07:40:47,489 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 178 [2023-11-23 07:40:47,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:40:47,492 INFO L225 Difference]: With dead ends: 332 [2023-11-23 07:40:47,493 INFO L226 Difference]: Without dead ends: 187 [2023-11-23 07:40:47,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-23 07:40:47,494 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 10 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 653 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 07:40:47,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 653 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 07:40:47,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2023-11-23 07:40:47,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 183. [2023-11-23 07:40:47,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 124 states have (on average 1.2258064516129032) internal successors, (152), 125 states have internal predecessors, (152), 39 states have call successors, (39), 17 states have call predecessors, (39), 19 states have return successors, (46), 40 states have call predecessors, (46), 38 states have call successors, (46) [2023-11-23 07:40:47,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 237 transitions. [2023-11-23 07:40:47,514 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 237 transitions. Word has length 178 [2023-11-23 07:40:47,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:40:47,515 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 237 transitions. [2023-11-23 07:40:47,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2023-11-23 07:40:47,515 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 237 transitions. [2023-11-23 07:40:47,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2023-11-23 07:40:47,517 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:40:47,517 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 07:40:47,547 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 07:40:47,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:40:47,748 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:40:47,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:40:47,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1809947508, now seen corresponding path program 1 times [2023-11-23 07:40:47,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:40:47,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140478901] [2023-11-23 07:40:47,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:40:47,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:40:47,812 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:40:47,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [524500078] [2023-11-23 07:40:47,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:40:47,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:40:47,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:40:47,832 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 07:40:47,864 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 07:40:48,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:40:48,738 INFO L262 TraceCheckSpWp]: Trace formula consists of 3623 conjuncts, 184 conjunts are in the unsatisfiable core [2023-11-23 07:40:48,750 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:40:48,778 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-23 07:40:48,969 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-23 07:40:49,034 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 55 [2023-11-23 07:40:49,457 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-23 07:40:49,556 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 55 [2023-11-23 07:40:53,326 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2023-11-23 07:40:53,327 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 07:40:53,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:40:53,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140478901] [2023-11-23 07:40:53,327 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:40:53,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524500078] [2023-11-23 07:40:53,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524500078] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 07:40:53,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 07:40:53,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2023-11-23 07:40:53,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746882524] [2023-11-23 07:40:53,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 07:40:53,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-23 07:40:53,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:40:53,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-23 07:40:53,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2023-11-23 07:40:53,329 INFO L87 Difference]: Start difference. First operand 183 states and 237 transitions. Second operand has 29 states, 23 states have (on average 3.652173913043478) internal successors, (84), 23 states have internal predecessors, (84), 12 states have call successors, (23), 4 states have call predecessors, (23), 7 states have return successors, (22), 11 states have call predecessors, (22), 10 states have call successors, (22) [2023-11-23 07:41:00,205 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-23 07:41:00,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:41:00,858 INFO L93 Difference]: Finished difference Result 221 states and 296 transitions. [2023-11-23 07:41:00,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-23 07:41:00,858 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 23 states have (on average 3.652173913043478) internal successors, (84), 23 states have internal predecessors, (84), 12 states have call successors, (23), 4 states have call predecessors, (23), 7 states have return successors, (22), 11 states have call predecessors, (22), 10 states have call successors, (22) Word has length 178 [2023-11-23 07:41:00,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:41:00,860 INFO L225 Difference]: With dead ends: 221 [2023-11-23 07:41:00,860 INFO L226 Difference]: Without dead ends: 219 [2023-11-23 07:41:00,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=220, Invalid=2132, Unknown=0, NotChecked=0, Total=2352 [2023-11-23 07:41:00,861 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 135 mSDsluCounter, 1418 mSDsCounter, 0 mSdLazyCounter, 3054 mSolverCounterSat, 58 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 1509 SdHoareTripleChecker+Invalid, 3113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 3054 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2023-11-23 07:41:00,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 1509 Invalid, 3113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 3054 Invalid, 1 Unknown, 0 Unchecked, 6.7s Time] [2023-11-23 07:41:00,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2023-11-23 07:41:00,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 212. [2023-11-23 07:41:00,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 145 states have (on average 1.2137931034482758) internal successors, (176), 149 states have internal predecessors, (176), 42 states have call successors, (42), 18 states have call predecessors, (42), 24 states have return successors, (67), 44 states have call predecessors, (67), 41 states have call successors, (67) [2023-11-23 07:41:00,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 285 transitions. [2023-11-23 07:41:00,874 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 285 transitions. Word has length 178 [2023-11-23 07:41:00,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:41:00,875 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 285 transitions. [2023-11-23 07:41:00,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 23 states have (on average 3.652173913043478) internal successors, (84), 23 states have internal predecessors, (84), 12 states have call successors, (23), 4 states have call predecessors, (23), 7 states have return successors, (22), 11 states have call predecessors, (22), 10 states have call successors, (22) [2023-11-23 07:41:00,875 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 285 transitions. [2023-11-23 07:41:00,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2023-11-23 07:41:00,876 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:41:00,876 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:41:00,888 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-23 07:41:01,091 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,SelfDestructingSolverStorable11 [2023-11-23 07:41:01,092 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:41:01,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:41:01,092 INFO L85 PathProgramCache]: Analyzing trace with hash 338158189, now seen corresponding path program 1 times [2023-11-23 07:41:01,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:41:01,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012841785] [2023-11-23 07:41:01,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:41:01,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:41:01,165 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:41:01,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [327064992] [2023-11-23 07:41:01,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:41:01,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:41:01,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:41:01,168 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 07:41:01,169 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 07:41:12,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:41:12,727 INFO L262 TraceCheckSpWp]: Trace formula consists of 3622 conjuncts, 135 conjunts are in the unsatisfiable core [2023-11-23 07:41:12,804 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:41:13,126 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 25 treesize of output 13 [2023-11-23 07:41:13,131 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 25 treesize of output 13 [2023-11-23 07:41:15,181 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 19 treesize of output 18 [2023-11-23 07:41:15,188 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 19 treesize of output 18 [2023-11-23 07:41:17,229 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-23 07:41:17,246 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 07:41:17,246 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2023-11-23 07:41:18,045 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 129 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-11-23 07:41:18,051 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 07:41:18,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:41:18,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012841785] [2023-11-23 07:41:18,052 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:41:18,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327064992] [2023-11-23 07:41:18,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327064992] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 07:41:18,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 07:41:18,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2023-11-23 07:41:18,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138405574] [2023-11-23 07:41:18,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 07:41:18,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-23 07:41:18,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:41:18,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-23 07:41:18,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=620, Unknown=2, NotChecked=0, Total=702 [2023-11-23 07:41:18,055 INFO L87 Difference]: Start difference. First operand 212 states and 285 transitions. Second operand has 27 states, 24 states have (on average 4.0) internal successors, (96), 24 states have internal predecessors, (96), 11 states have call successors, (27), 4 states have call predecessors, (27), 9 states have return successors, (25), 10 states have call predecessors, (25), 11 states have call successors, (25) [2023-11-23 07:41:29,876 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 07:41:31,883 WARN L539 Checker$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 07:41:33,905 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 07:41:35,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:41:35,292 INFO L93 Difference]: Finished difference Result 623 states and 845 transitions. [2023-11-23 07:41:35,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-11-23 07:41:35,292 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 4.0) internal successors, (96), 24 states have internal predecessors, (96), 11 states have call successors, (27), 4 states have call predecessors, (27), 9 states have return successors, (25), 10 states have call predecessors, (25), 11 states have call successors, (25) Word has length 182 [2023-11-23 07:41:35,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:41:35,305 INFO L225 Difference]: With dead ends: 623 [2023-11-23 07:41:35,305 INFO L226 Difference]: Without dead ends: 432 [2023-11-23 07:41:35,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 158 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1194 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=423, Invalid=3862, Unknown=5, NotChecked=0, Total=4290 [2023-11-23 07:41:35,308 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 422 mSDsluCounter, 1059 mSDsCounter, 0 mSdLazyCounter, 3253 mSolverCounterSat, 178 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 1152 SdHoareTripleChecker+Invalid, 3434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 3253 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.0s IncrementalHoareTripleChecker+Time [2023-11-23 07:41:35,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [447 Valid, 1152 Invalid, 3434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 3253 Invalid, 3 Unknown, 0 Unchecked, 10.0s Time] [2023-11-23 07:41:35,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2023-11-23 07:41:35,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 401. [2023-11-23 07:41:35,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 277 states have (on average 1.2166064981949458) internal successors, (337), 286 states have internal predecessors, (337), 77 states have call successors, (77), 34 states have call predecessors, (77), 46 states have return successors, (130), 80 states have call predecessors, (130), 75 states have call successors, (130) [2023-11-23 07:41:35,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 544 transitions. [2023-11-23 07:41:35,336 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 544 transitions. Word has length 182 [2023-11-23 07:41:35,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:41:35,337 INFO L495 AbstractCegarLoop]: Abstraction has 401 states and 544 transitions. [2023-11-23 07:41:35,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 4.0) internal successors, (96), 24 states have internal predecessors, (96), 11 states have call successors, (27), 4 states have call predecessors, (27), 9 states have return successors, (25), 10 states have call predecessors, (25), 11 states have call successors, (25) [2023-11-23 07:41:35,337 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 544 transitions. [2023-11-23 07:41:35,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2023-11-23 07:41:35,339 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:41:35,339 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:41:35,361 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 07:41:35,560 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,SelfDestructingSolverStorable12 [2023-11-23 07:41:35,560 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:41:35,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:41:35,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1697454133, now seen corresponding path program 1 times [2023-11-23 07:41:35,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:41:35,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143293579] [2023-11-23 07:41:35,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:41:35,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:41:35,673 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:41:35,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2101600120] [2023-11-23 07:41:35,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:41:35,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:41:35,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:41:35,697 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 07:41:35,698 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 07:41:36,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:41:36,326 INFO L262 TraceCheckSpWp]: Trace formula consists of 3617 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 07:41:36,331 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:41:36,340 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2023-11-23 07:41:36,341 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 07:41:36,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:41:36,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143293579] [2023-11-23 07:41:36,341 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:41:36,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101600120] [2023-11-23 07:41:36,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101600120] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 07:41:36,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 07:41:36,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 07:41:36,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248262066] [2023-11-23 07:41:36,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 07:41:36,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 07:41:36,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:41:36,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 07:41:36,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 07:41:36,345 INFO L87 Difference]: Start difference. First operand 401 states and 544 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2023-11-23 07:41:36,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:41:36,507 INFO L93 Difference]: Finished difference Result 769 states and 1047 transitions. [2023-11-23 07:41:36,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 07:41:36,507 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 190 [2023-11-23 07:41:36,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:41:36,509 INFO L225 Difference]: With dead ends: 769 [2023-11-23 07:41:36,509 INFO L226 Difference]: Without dead ends: 421 [2023-11-23 07:41:36,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 07:41:36,511 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 2 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 07:41:36,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 518 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 07:41:36,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2023-11-23 07:41:36,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 411. [2023-11-23 07:41:36,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 287 states have (on average 1.2055749128919862) internal successors, (346), 296 states have internal predecessors, (346), 77 states have call successors, (77), 34 states have call predecessors, (77), 46 states have return successors, (130), 80 states have call predecessors, (130), 75 states have call successors, (130) [2023-11-23 07:41:36,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 553 transitions. [2023-11-23 07:41:36,537 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 553 transitions. Word has length 190 [2023-11-23 07:41:36,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:41:36,537 INFO L495 AbstractCegarLoop]: Abstraction has 411 states and 553 transitions. [2023-11-23 07:41:36,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2023-11-23 07:41:36,538 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 553 transitions. [2023-11-23 07:41:36,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2023-11-23 07:41:36,539 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:41:36,539 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:41:36,564 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-23 07:41:36,755 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,SelfDestructingSolverStorable13 [2023-11-23 07:41:36,755 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:41:36,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:41:36,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1220527721, now seen corresponding path program 1 times [2023-11-23 07:41:36,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:41:36,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138032336] [2023-11-23 07:41:36,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:41:36,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:41:36,809 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:41:36,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2074405591] [2023-11-23 07:41:36,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:41:36,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:41:36,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:41:36,825 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 07:41:36,879 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 07:41:37,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:41:37,555 INFO L262 TraceCheckSpWp]: Trace formula consists of 3614 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 07:41:37,559 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:41:37,575 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 104 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2023-11-23 07:41:37,575 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 07:41:37,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:41:37,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138032336] [2023-11-23 07:41:37,576 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:41:37,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074405591] [2023-11-23 07:41:37,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074405591] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 07:41:37,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 07:41:37,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 07:41:37,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078281868] [2023-11-23 07:41:37,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 07:41:37,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 07:41:37,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:41:37,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 07:41:37,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 07:41:37,579 INFO L87 Difference]: Start difference. First operand 411 states and 553 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2023-11-23 07:41:37,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:41:37,764 INFO L93 Difference]: Finished difference Result 811 states and 1096 transitions. [2023-11-23 07:41:37,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 07:41:37,765 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 182 [2023-11-23 07:41:37,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:41:37,767 INFO L225 Difference]: With dead ends: 811 [2023-11-23 07:41:37,767 INFO L226 Difference]: Without dead ends: 453 [2023-11-23 07:41:37,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 178 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 07:41:37,769 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 6 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 716 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 07:41:37,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 716 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 07:41:37,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2023-11-23 07:41:37,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 397. [2023-11-23 07:41:37,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 273 states have (on average 1.2087912087912087) internal successors, (330), 282 states have internal predecessors, (330), 77 states have call successors, (77), 34 states have call predecessors, (77), 46 states have return successors, (130), 80 states have call predecessors, (130), 75 states have call successors, (130) [2023-11-23 07:41:37,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 537 transitions. [2023-11-23 07:41:37,797 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 537 transitions. Word has length 182 [2023-11-23 07:41:37,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:41:37,797 INFO L495 AbstractCegarLoop]: Abstraction has 397 states and 537 transitions. [2023-11-23 07:41:37,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2023-11-23 07:41:37,797 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 537 transitions. [2023-11-23 07:41:37,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2023-11-23 07:41:37,799 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:41:37,799 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 07:41:37,817 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-23 07:41:38,017 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,SelfDestructingSolverStorable14 [2023-11-23 07:41:38,018 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:41:38,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:41:38,018 INFO L85 PathProgramCache]: Analyzing trace with hash -93413071, now seen corresponding path program 1 times [2023-11-23 07:41:38,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:41:38,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525418693] [2023-11-23 07:41:38,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:41:38,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:41:38,080 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:41:38,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1025103826] [2023-11-23 07:41:38,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:41:38,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:41:38,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:41:38,093 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 07:41:38,131 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 07:41:39,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:41:39,642 INFO L262 TraceCheckSpWp]: Trace formula consists of 3630 conjuncts, 93 conjunts are in the unsatisfiable core [2023-11-23 07:41:39,649 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:41:39,658 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-23 07:41:39,660 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-23 07:41:40,372 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-11-23 07:41:40,373 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 07:41:40,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:41:40,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525418693] [2023-11-23 07:41:40,373 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:41:40,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025103826] [2023-11-23 07:41:40,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025103826] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 07:41:40,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 07:41:40,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2023-11-23 07:41:40,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595830222] [2023-11-23 07:41:40,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 07:41:40,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-23 07:41:40,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:41:40,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-23 07:41:40,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2023-11-23 07:41:40,375 INFO L87 Difference]: Start difference. First operand 397 states and 537 transitions. Second operand has 15 states, 15 states have (on average 5.733333333333333) internal successors, (86), 15 states have internal predecessors, (86), 7 states have call successors, (25), 3 states have call predecessors, (25), 4 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) [2023-11-23 07:41:42,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:41:42,535 INFO L93 Difference]: Finished difference Result 813 states and 1110 transitions. [2023-11-23 07:41:42,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-23 07:41:42,536 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.733333333333333) internal successors, (86), 15 states have internal predecessors, (86), 7 states have call successors, (25), 3 states have call predecessors, (25), 4 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) Word has length 182 [2023-11-23 07:41:42,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:41:42,537 INFO L225 Difference]: With dead ends: 813 [2023-11-23 07:41:42,538 INFO L226 Difference]: Without dead ends: 469 [2023-11-23 07:41:42,539 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2023-11-23 07:41:42,539 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 148 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 1832 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 1869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-23 07:41:42,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 639 Invalid, 1869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1832 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-23 07:41:42,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2023-11-23 07:41:42,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 387. [2023-11-23 07:41:42,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 263 states have (on average 1.193916349809886) internal successors, (314), 273 states have internal predecessors, (314), 77 states have call successors, (77), 34 states have call predecessors, (77), 46 states have return successors, (130), 79 states have call predecessors, (130), 75 states have call successors, (130) [2023-11-23 07:41:42,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 521 transitions. [2023-11-23 07:41:42,566 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 521 transitions. Word has length 182 [2023-11-23 07:41:42,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:41:42,567 INFO L495 AbstractCegarLoop]: Abstraction has 387 states and 521 transitions. [2023-11-23 07:41:42,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.733333333333333) internal successors, (86), 15 states have internal predecessors, (86), 7 states have call successors, (25), 3 states have call predecessors, (25), 4 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) [2023-11-23 07:41:42,567 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 521 transitions. [2023-11-23 07:41:42,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2023-11-23 07:41:42,568 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:41:42,568 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 07:41:42,590 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 07:41:42,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:41:42,788 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:41:42,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:41:42,788 INFO L85 PathProgramCache]: Analyzing trace with hash -8274677, now seen corresponding path program 1 times [2023-11-23 07:41:42,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:41:42,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589484645] [2023-11-23 07:41:42,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:41:42,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:41:42,849 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:41:42,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1208980255] [2023-11-23 07:41:42,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:41:42,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:41:42,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:41:42,864 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 07:41:42,915 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 07:41:43,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:41:43,574 INFO L262 TraceCheckSpWp]: Trace formula consists of 3696 conjuncts, 88 conjunts are in the unsatisfiable core [2023-11-23 07:41:43,579 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:41:43,636 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-23 07:41:43,682 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 26 treesize of output 14 [2023-11-23 07:41:45,769 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 07:41:45,793 WARN L876 $PredicateComparison]: unable to prove that (exists ((ensure_array_list_has_allocated_data_member_~list.offset Int)) (and (<= |c_ensure_array_list_has_allocated_data_member_#in~list.offset| ensure_array_list_has_allocated_data_member_~list.offset) (= (store |c_old(#memory_$Pointer$#1.base)| |c_ensure_array_list_has_allocated_data_member_#in~list.base| (let ((.cse1 (select |c_#memory_$Pointer$#1.base| |c_ensure_array_list_has_allocated_data_member_#in~list.base|))) (store (let ((.cse0 (+ ensure_array_list_has_allocated_data_member_~list.offset 32))) (store (select |c_old(#memory_$Pointer$#1.base)| |c_ensure_array_list_has_allocated_data_member_#in~list.base|) .cse0 (select .cse1 .cse0))) ensure_array_list_has_allocated_data_member_~list.offset (select .cse1 ensure_array_list_has_allocated_data_member_~list.offset)))) |c_#memory_$Pointer$#1.base|))) is different from true [2023-11-23 07:41:45,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:41:45,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:41:45,809 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 12 [2023-11-23 07:41:45,817 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 20 treesize of output 19 [2023-11-23 07:41:45,843 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 07:41:45,843 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 8 [2023-11-23 07:41:45,990 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 07:41:45,990 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 8 [2023-11-23 07:41:46,005 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 07:41:46,005 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 8 [2023-11-23 07:41:46,505 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 07:41:46,506 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 8 [2023-11-23 07:41:46,631 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 114 proven. 10 refuted. 0 times theorem prover too weak. 58 trivial. 2 not checked. [2023-11-23 07:41:46,632 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 07:41:46,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:41:46,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589484645] [2023-11-23 07:41:46,911 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:41:46,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208980255] [2023-11-23 07:41:46,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208980255] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 07:41:46,911 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-23 07:41:46,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2023-11-23 07:41:46,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914392467] [2023-11-23 07:41:46,912 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-23 07:41:46,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-23 07:41:46,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:41:46,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-23 07:41:46,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=712, Unknown=2, NotChecked=54, Total=870 [2023-11-23 07:41:46,913 INFO L87 Difference]: Start difference. First operand 387 states and 521 transitions. Second operand has 24 states, 21 states have (on average 4.857142857142857) internal successors, (102), 21 states have internal predecessors, (102), 14 states have call successors, (28), 6 states have call predecessors, (28), 9 states have return successors, (26), 12 states have call predecessors, (26), 13 states have call successors, (26) [2023-11-23 07:41:49,458 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 07:41:52,090 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 07:41:54,205 WARN L539 Checker$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 07:41:59,763 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 07:42:01,912 WARN L539 Checker$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 07:42:04,116 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 07:42:06,270 WARN L539 Checker$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 07:42:09,385 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 07:42:11,414 WARN L539 Checker$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 07:42:14,261 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 07:42:19,244 WARN L539 Checker$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 07:42:21,332 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 07:42:23,502 WARN L539 Checker$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 07:42:31,717 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 07:42:36,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:42:36,020 INFO L93 Difference]: Finished difference Result 754 states and 1023 transitions. [2023-11-23 07:42:36,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-23 07:42:36,021 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 4.857142857142857) internal successors, (102), 21 states have internal predecessors, (102), 14 states have call successors, (28), 6 states have call predecessors, (28), 9 states have return successors, (26), 12 states have call predecessors, (26), 13 states have call successors, (26) Word has length 192 [2023-11-23 07:42:36,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:42:36,023 INFO L225 Difference]: With dead ends: 754 [2023-11-23 07:42:36,024 INFO L226 Difference]: Without dead ends: 592 [2023-11-23 07:42:36,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 206 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=312, Invalid=2139, Unknown=3, NotChecked=96, Total=2550 [2023-11-23 07:42:36,033 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 212 mSDsluCounter, 1398 mSDsCounter, 0 mSdLazyCounter, 3605 mSolverCounterSat, 119 mSolverCounterUnsat, 18 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 44.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 1550 SdHoareTripleChecker+Invalid, 4117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 3605 IncrementalHoareTripleChecker+Invalid, 18 IncrementalHoareTripleChecker+Unknown, 375 IncrementalHoareTripleChecker+Unchecked, 44.7s IncrementalHoareTripleChecker+Time [2023-11-23 07:42:36,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 1550 Invalid, 4117 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [119 Valid, 3605 Invalid, 18 Unknown, 375 Unchecked, 44.7s Time] [2023-11-23 07:42:36,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2023-11-23 07:42:36,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 550. [2023-11-23 07:42:36,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 378 states have (on average 1.2037037037037037) internal successors, (455), 390 states have internal predecessors, (455), 108 states have call successors, (108), 49 states have call predecessors, (108), 63 states have return successors, (170), 110 states have call predecessors, (170), 105 states have call successors, (170) [2023-11-23 07:42:36,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 733 transitions. [2023-11-23 07:42:36,085 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 733 transitions. Word has length 192 [2023-11-23 07:42:36,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:42:36,086 INFO L495 AbstractCegarLoop]: Abstraction has 550 states and 733 transitions. [2023-11-23 07:42:36,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 4.857142857142857) internal successors, (102), 21 states have internal predecessors, (102), 14 states have call successors, (28), 6 states have call predecessors, (28), 9 states have return successors, (26), 12 states have call predecessors, (26), 13 states have call successors, (26) [2023-11-23 07:42:36,086 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 733 transitions. [2023-11-23 07:42:36,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2023-11-23 07:42:36,088 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:42:36,088 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 07:42:36,122 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 07:42:36,304 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,SelfDestructingSolverStorable16 [2023-11-23 07:42:36,305 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:42:36,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:42:36,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1331230216, now seen corresponding path program 1 times [2023-11-23 07:42:36,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:42:36,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189023243] [2023-11-23 07:42:36,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:42:36,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:42:36,359 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:42:36,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2113694015] [2023-11-23 07:42:36,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:42:36,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:42:36,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:42:36,360 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 07:42:36,374 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 07:42:37,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:42:37,090 INFO L262 TraceCheckSpWp]: Trace formula consists of 3657 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-23 07:42:37,094 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:42:37,697 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 121 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-11-23 07:42:37,697 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 07:42:37,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:42:37,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189023243] [2023-11-23 07:42:37,698 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:42:37,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113694015] [2023-11-23 07:42:37,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113694015] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 07:42:37,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 07:42:37,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-23 07:42:37,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660775714] [2023-11-23 07:42:37,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 07:42:37,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-23 07:42:37,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:42:37,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-23 07:42:37,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2023-11-23 07:42:37,699 INFO L87 Difference]: Start difference. First operand 550 states and 733 transitions. Second operand has 11 states, 9 states have (on average 10.444444444444445) internal successors, (94), 8 states have internal predecessors, (94), 2 states have call successors, (28), 2 states have call predecessors, (28), 5 states have return successors, (27), 5 states have call predecessors, (27), 2 states have call successors, (27) [2023-11-23 07:42:39,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:42:39,337 INFO L93 Difference]: Finished difference Result 1085 states and 1456 transitions. [2023-11-23 07:42:39,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-23 07:42:39,337 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 10.444444444444445) internal successors, (94), 8 states have internal predecessors, (94), 2 states have call successors, (28), 2 states have call predecessors, (28), 5 states have return successors, (27), 5 states have call predecessors, (27), 2 states have call successors, (27) Word has length 195 [2023-11-23 07:42:39,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:42:39,340 INFO L225 Difference]: With dead ends: 1085 [2023-11-23 07:42:39,340 INFO L226 Difference]: Without dead ends: 603 [2023-11-23 07:42:39,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2023-11-23 07:42:39,342 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 15 mSDsluCounter, 1651 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 1837 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-23 07:42:39,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 1837 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-23 07:42:39,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2023-11-23 07:42:39,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 559. [2023-11-23 07:42:39,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 387 states have (on average 1.20671834625323) internal successors, (467), 396 states have internal predecessors, (467), 108 states have call successors, (108), 49 states have call predecessors, (108), 63 states have return successors, (162), 113 states have call predecessors, (162), 105 states have call successors, (162) [2023-11-23 07:42:39,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 737 transitions. [2023-11-23 07:42:39,378 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 737 transitions. Word has length 195 [2023-11-23 07:42:39,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:42:39,379 INFO L495 AbstractCegarLoop]: Abstraction has 559 states and 737 transitions. [2023-11-23 07:42:39,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 10.444444444444445) internal successors, (94), 8 states have internal predecessors, (94), 2 states have call successors, (28), 2 states have call predecessors, (28), 5 states have return successors, (27), 5 states have call predecessors, (27), 2 states have call successors, (27) [2023-11-23 07:42:39,379 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 737 transitions. [2023-11-23 07:42:39,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2023-11-23 07:42:39,381 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:42:39,381 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 07:42:39,397 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-23 07:42:39,596 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,SelfDestructingSolverStorable17 [2023-11-23 07:42:39,596 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:42:39,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:42:39,597 INFO L85 PathProgramCache]: Analyzing trace with hash 793118424, now seen corresponding path program 2 times [2023-11-23 07:42:39,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:42:39,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832250170] [2023-11-23 07:42:39,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:42:39,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:42:39,658 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:42:39,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1527708123] [2023-11-23 07:42:39,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 07:42:39,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:42:39,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:42:39,673 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 07:42:39,700 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 07:43:28,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 07:43:28,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 07:43:28,082 INFO L262 TraceCheckSpWp]: Trace formula consists of 3659 conjuncts, 154 conjunts are in the unsatisfiable core [2023-11-23 07:43:28,087 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:43:28,941 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-23 07:43:29,353 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 26 treesize of output 14 [2023-11-23 07:43:29,680 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 20 treesize of output 19 [2023-11-23 07:43:29,711 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-23 07:43:29,894 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 07:43:29,895 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 8 [2023-11-23 07:43:34,834 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-11-23 07:43:35,093 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-23 07:43:35,093 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 13 [2023-11-23 07:43:35,216 INFO L349 Elim1Store]: treesize reduction 13, result has 51.9 percent of original size [2023-11-23 07:43:35,217 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 28 [2023-11-23 07:43:36,023 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 116 proven. 4 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-11-23 07:43:36,023 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 07:43:37,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:43:37,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832250170] [2023-11-23 07:43:37,565 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:43:37,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527708123] [2023-11-23 07:43:37,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527708123] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 07:43:37,566 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-23 07:43:37,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2023-11-23 07:43:37,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970675017] [2023-11-23 07:43:37,566 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-23 07:43:37,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-23 07:43:37,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:43:37,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-23 07:43:37,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2023-11-23 07:43:37,567 INFO L87 Difference]: Start difference. First operand 559 states and 737 transitions. Second operand has 24 states, 20 states have (on average 4.8) internal successors, (96), 20 states have internal predecessors, (96), 12 states have call successors, (27), 6 states have call predecessors, (27), 9 states have return successors, (25), 11 states have call predecessors, (25), 12 states have call successors, (25) [2023-11-23 07:43:40,147 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 07:43:44,716 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 07:43:47,826 WARN L539 Checker$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 07:43:51,981 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 07:43:54,121 WARN L539 Checker$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 07:43:56,379 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 07:43:58,577 WARN L539 Checker$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 07:44:01,464 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 07:44:09,361 WARN L539 Checker$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 07:44:11,675 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 07:44:14,151 WARN L539 Checker$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 07:44:21,353 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 07:44:35,555 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 07:44:39,000 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 07:44:42,268 WARN L539 Checker$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 07:44:43,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:44:43,184 INFO L93 Difference]: Finished difference Result 1261 states and 1660 transitions. [2023-11-23 07:44:43,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-11-23 07:44:43,185 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 20 states have (on average 4.8) internal successors, (96), 20 states have internal predecessors, (96), 12 states have call successors, (27), 6 states have call predecessors, (27), 9 states have return successors, (25), 11 states have call predecessors, (25), 12 states have call successors, (25) Word has length 187 [2023-11-23 07:44:43,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:44:43,189 INFO L225 Difference]: With dead ends: 1261 [2023-11-23 07:44:43,189 INFO L226 Difference]: Without dead ends: 942 [2023-11-23 07:44:43,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 201 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=484, Invalid=3176, Unknown=0, NotChecked=0, Total=3660 [2023-11-23 07:44:43,198 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 419 mSDsluCounter, 1332 mSDsCounter, 0 mSdLazyCounter, 4309 mSolverCounterSat, 241 mSolverCounterUnsat, 25 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 54.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 1495 SdHoareTripleChecker+Invalid, 4575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 4309 IncrementalHoareTripleChecker+Invalid, 25 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 54.8s IncrementalHoareTripleChecker+Time [2023-11-23 07:44:43,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [448 Valid, 1495 Invalid, 4575 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [241 Valid, 4309 Invalid, 25 Unknown, 0 Unchecked, 54.8s Time] [2023-11-23 07:44:43,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 942 states. [2023-11-23 07:44:43,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 942 to 898. [2023-11-23 07:44:43,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 628 states have (on average 1.194267515923567) internal successors, (750), 644 states have internal predecessors, (750), 167 states have call successors, (167), 75 states have call predecessors, (167), 102 states have return successors, (254), 178 states have call predecessors, (254), 162 states have call successors, (254) [2023-11-23 07:44:43,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 1171 transitions. [2023-11-23 07:44:43,344 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 1171 transitions. Word has length 187 [2023-11-23 07:44:43,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:44:43,345 INFO L495 AbstractCegarLoop]: Abstraction has 898 states and 1171 transitions. [2023-11-23 07:44:43,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 20 states have (on average 4.8) internal successors, (96), 20 states have internal predecessors, (96), 12 states have call successors, (27), 6 states have call predecessors, (27), 9 states have return successors, (25), 11 states have call predecessors, (25), 12 states have call successors, (25) [2023-11-23 07:44:43,345 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 1171 transitions. [2023-11-23 07:44:43,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2023-11-23 07:44:43,362 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:44:43,362 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:44:43,419 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 07:44:43,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:44:43,584 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:44:43,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:44:43,585 INFO L85 PathProgramCache]: Analyzing trace with hash -462278443, now seen corresponding path program 1 times [2023-11-23 07:44:43,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:44:43,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645142097] [2023-11-23 07:44:43,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:44:43,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:44:43,657 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:44:43,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1015689231] [2023-11-23 07:44:43,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:44:43,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:44:43,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:44:43,674 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 07:44:43,675 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 07:44:44,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:44:44,396 INFO L262 TraceCheckSpWp]: Trace formula consists of 3666 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-23 07:44:44,401 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:44:45,241 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2023-11-23 07:44:45,241 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 07:44:45,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:44:45,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645142097] [2023-11-23 07:44:45,242 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:44:45,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015689231] [2023-11-23 07:44:45,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015689231] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 07:44:45,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 07:44:45,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-11-23 07:44:45,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351728872] [2023-11-23 07:44:45,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 07:44:45,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-23 07:44:45,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:44:45,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-23 07:44:45,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2023-11-23 07:44:45,244 INFO L87 Difference]: Start difference. First operand 898 states and 1171 transitions. Second operand has 13 states, 9 states have (on average 10.666666666666666) internal successors, (96), 10 states have internal predecessors, (96), 4 states have call successors, (28), 2 states have call predecessors, (28), 6 states have return successors, (27), 5 states have call predecessors, (27), 4 states have call successors, (27) [2023-11-23 07:44:47,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:44:47,797 INFO L93 Difference]: Finished difference Result 1592 states and 2044 transitions. [2023-11-23 07:44:47,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-23 07:44:47,798 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 9 states have (on average 10.666666666666666) internal successors, (96), 10 states have internal predecessors, (96), 4 states have call successors, (28), 2 states have call predecessors, (28), 6 states have return successors, (27), 5 states have call predecessors, (27), 4 states have call successors, (27) Word has length 191 [2023-11-23 07:44:47,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:44:47,802 INFO L225 Difference]: With dead ends: 1592 [2023-11-23 07:44:47,802 INFO L226 Difference]: Without dead ends: 904 [2023-11-23 07:44:47,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2023-11-23 07:44:47,804 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 11 mSDsluCounter, 1946 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 2127 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-11-23 07:44:47,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 2127 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-11-23 07:44:47,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2023-11-23 07:44:47,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 889. [2023-11-23 07:44:47,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 625 states have (on average 1.1952) internal successors, (747), 641 states have internal predecessors, (747), 161 states have call successors, (161), 75 states have call predecessors, (161), 102 states have return successors, (233), 172 states have call predecessors, (233), 156 states have call successors, (233) [2023-11-23 07:44:47,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 1141 transitions. [2023-11-23 07:44:47,872 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 1141 transitions. Word has length 191 [2023-11-23 07:44:47,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:44:47,873 INFO L495 AbstractCegarLoop]: Abstraction has 889 states and 1141 transitions. [2023-11-23 07:44:47,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 9 states have (on average 10.666666666666666) internal successors, (96), 10 states have internal predecessors, (96), 4 states have call successors, (28), 2 states have call predecessors, (28), 6 states have return successors, (27), 5 states have call predecessors, (27), 4 states have call successors, (27) [2023-11-23 07:44:47,873 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 1141 transitions. [2023-11-23 07:44:47,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2023-11-23 07:44:47,876 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:44:47,876 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 07:44:47,898 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 07:44:48,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:44:48,092 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:44:48,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:44:48,093 INFO L85 PathProgramCache]: Analyzing trace with hash 335856860, now seen corresponding path program 2 times [2023-11-23 07:44:48,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:44:48,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683627943] [2023-11-23 07:44:48,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:44:48,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:44:48,199 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:44:48,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [657960897] [2023-11-23 07:44:48,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 07:44:48,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:44:48,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:44:48,201 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 07:44:48,238 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 07:44:49,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 07:44:49,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 07:44:49,492 INFO L262 TraceCheckSpWp]: Trace formula consists of 3667 conjuncts, 121 conjunts are in the unsatisfiable core [2023-11-23 07:44:49,506 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:44:49,861 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-23 07:44:50,175 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 26 treesize of output 14 [2023-11-23 07:44:52,394 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 22 treesize of output 21 [2023-11-23 07:44:52,428 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 Killed by 15