./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/aws-c-common/aws_priority_queue_init_dynamic_harness-1.i --full-output --preprocessor.use.memory.slicer false --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version abd6749d Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/aws-c-common/aws_priority_queue_init_dynamic_harness-1.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 f4db5fb03820aea666082345ea177387bf1c218ce33dad19402cb646ed5abf58 --preprocessor.use.memory.slicer false --- Real Ultimate output --- This is Ultimate 0.2.3-?-abd6749-m [2023-11-23 08:57:46,402 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 08:57:46,545 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2023-11-23 08:57:46,549 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 08:57:46,550 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 08:57:46,595 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 08:57:46,596 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 08:57:46,596 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 08:57:46,598 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-23 08:57:46,601 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-23 08:57:46,602 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 08:57:46,602 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 08:57:46,603 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 08:57:46,604 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 08:57:46,604 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 08:57:46,605 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 08:57:46,605 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 08:57:46,605 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 08:57:46,606 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 08:57:46,606 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 08:57:46,606 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 08:57:46,607 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 08:57:46,607 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 08:57:46,611 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 08:57:46,612 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 08:57:46,612 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 08:57:46,612 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 08:57:46,612 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 08:57:46,613 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 08:57:46,613 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 08:57:46,614 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 08:57:46,614 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 08:57:46,614 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 08:57:46,615 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 08:57:46,615 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 08:57:46,615 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 08:57:46,615 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 08:57:46,616 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 08:57:46,616 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 08:57:46,632 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f4db5fb03820aea666082345ea177387bf1c218ce33dad19402cb646ed5abf58 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.preprocessor: Use memory slicer -> false [2023-11-23 08:57:46,906 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 08:57:46,933 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 08:57:46,936 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 08:57:46,937 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 08:57:46,937 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 08:57:46,938 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/aws-c-common/aws_priority_queue_init_dynamic_harness-1.i [2023-11-23 08:57:48,269 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 08:57:48,713 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 08:57:48,716 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/aws-c-common/aws_priority_queue_init_dynamic_harness-1.i [2023-11-23 08:57:48,752 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe84c1a64/ef23eb83dc8247d39b6d39922bc9911b/FLAGada545267 [2023-11-23 08:57:48,770 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe84c1a64/ef23eb83dc8247d39b6d39922bc9911b [2023-11-23 08:57:48,773 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 08:57:48,774 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 08:57:48,777 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 08:57:48,777 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 08:57:48,782 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 08:57:48,783 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:57:48" (1/1) ... [2023-11-23 08:57:48,784 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7842316f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:57:48, skipping insertion in model container [2023-11-23 08:57:48,784 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:57:48" (1/1) ... [2023-11-23 08:57:48,903 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 08:57:49,120 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/aws-c-common/aws_priority_queue_init_dynamic_harness-1.i[4505,4518] [2023-11-23 08:57:49,129 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/aws-c-common/aws_priority_queue_init_dynamic_harness-1.i[4565,4578] [2023-11-23 08:57:49,726 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:57:49,727 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:57:49,727 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:57:49,728 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:57:49,729 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:57:49,738 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:57:49,738 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:57:49,739 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:57:49,740 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:57:49,981 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-23 08:57:49,983 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-23 08:57:49,983 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-23 08:57:49,986 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-23 08:57:49,996 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-23 08:57:49,997 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-23 08:57:49,998 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-23 08:57:49,999 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-23 08:57:50,002 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-23 08:57:50,003 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-23 08:57:50,146 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:57:50,146 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:57:50,192 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 08:57:50,235 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 08:57:50,257 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/aws-c-common/aws_priority_queue_init_dynamic_harness-1.i[4505,4518] [2023-11-23 08:57:50,257 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/aws-c-common/aws_priority_queue_init_dynamic_harness-1.i[4565,4578] [2023-11-23 08:57:50,311 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:57:50,312 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:57:50,313 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:57:50,314 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:57:50,314 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:57:50,319 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:57:50,320 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:57:50,321 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:57:50,322 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:57:50,359 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-23 08:57:50,360 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-23 08:57:50,361 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-23 08:57:50,362 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-23 08:57:50,362 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-23 08:57:50,363 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-23 08:57:50,363 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-23 08:57:50,364 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-23 08:57:50,364 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-23 08:57:50,365 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-23 08:57:50,404 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:57:50,404 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:57:50,410 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : : "r"(pBuf) : "memory"); [7703-7714] [2023-11-23 08:57:50,433 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 08:57:50,650 WARN L675 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 08:57:50,651 WARN L675 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 08:57:50,651 WARN L675 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 08:57:50,651 WARN L675 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 08:57:50,651 WARN L675 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 08:57:50,651 WARN L675 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 08:57:50,652 WARN L675 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 08:57:50,652 WARN L675 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 08:57:50,652 WARN L675 CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 08:57:50,652 WARN L675 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 08:57:50,653 WARN L675 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 08:57:50,653 WARN L675 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 08:57:50,653 WARN L675 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 08:57:50,653 WARN L675 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 08:57:50,654 WARN L675 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 08:57:50,661 INFO L206 MainTranslator]: Completed translation [2023-11-23 08:57:50,661 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:57:50 WrapperNode [2023-11-23 08:57:50,661 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 08:57:50,663 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 08:57:50,663 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 08:57:50,664 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 08:57:50,670 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:57:50" (1/1) ... [2023-11-23 08:57:50,781 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:57:50" (1/1) ... [2023-11-23 08:57:50,857 INFO L138 Inliner]: procedures = 688, calls = 1518, calls flagged for inlining = 52, calls inlined = 9, statements flattened = 740 [2023-11-23 08:57:50,858 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 08:57:50,858 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 08:57:50,858 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 08:57:50,861 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 08:57:50,870 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:57:50" (1/1) ... [2023-11-23 08:57:50,870 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:57:50" (1/1) ... [2023-11-23 08:57:50,882 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:57:50" (1/1) ... [2023-11-23 08:57:50,886 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:57:50" (1/1) ... [2023-11-23 08:57:50,929 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:57:50" (1/1) ... [2023-11-23 08:57:50,935 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:57:50" (1/1) ... [2023-11-23 08:57:50,948 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:57:50" (1/1) ... [2023-11-23 08:57:50,952 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:57:50" (1/1) ... [2023-11-23 08:57:50,972 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 08:57:50,973 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 08:57:50,978 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 08:57:50,978 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 08:57:50,979 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:57:50" (1/1) ... [2023-11-23 08:57:50,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 08:57:50,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 08:57:51,010 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 08:57:51,034 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 08:57:51,068 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2023-11-23 08:57:51,068 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2023-11-23 08:57:51,068 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 08:57:51,069 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_valid [2023-11-23 08:57:51,069 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_valid [2023-11-23 08:57:51,069 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2023-11-23 08:57:51,070 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2023-11-23 08:57:51,070 INFO L130 BoogieDeclarations]: Found specification of procedure aws_allocator_is_valid [2023-11-23 08:57:51,070 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_allocator_is_valid [2023-11-23 08:57:51,071 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 08:57:51,071 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2023-11-23 08:57:51,071 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2023-11-23 08:57:51,071 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-23 08:57:51,071 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-23 08:57:51,071 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 08:57:51,071 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 08:57:51,071 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-23 08:57:51,072 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 08:57:51,072 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 08:57:51,072 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2023-11-23 08:57:51,073 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2023-11-23 08:57:51,073 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_size_t [2023-11-23 08:57:51,073 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_size_t [2023-11-23 08:57:51,073 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2023-11-23 08:57:51,073 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2023-11-23 08:57:51,073 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_malloc [2023-11-23 08:57:51,073 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_malloc [2023-11-23 08:57:51,073 INFO L130 BoogieDeclarations]: Found specification of procedure aws_priority_queue_is_valid [2023-11-23 08:57:51,074 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_priority_queue_is_valid [2023-11-23 08:57:51,074 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-23 08:57:51,074 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-23 08:57:51,074 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 08:57:51,075 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-23 08:57:51,075 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-23 08:57:51,075 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2023-11-23 08:57:51,075 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2023-11-23 08:57:51,075 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2023-11-23 08:57:51,075 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2023-11-23 08:57:51,075 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 08:57:51,076 INFO L130 BoogieDeclarations]: Found specification of procedure memset_impl [2023-11-23 08:57:51,076 INFO L138 BoogieDeclarations]: Found implementation of procedure memset_impl [2023-11-23 08:57:51,076 INFO L130 BoogieDeclarations]: Found specification of procedure my_memset [2023-11-23 08:57:51,076 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memset [2023-11-23 08:57:51,077 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 08:57:51,347 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 08:57:51,349 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 08:57:52,292 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 08:57:52,389 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 08:57:52,389 INFO L309 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-23 08:57:52,390 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:57:52 BoogieIcfgContainer [2023-11-23 08:57:52,390 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 08:57:52,393 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 08:57:52,393 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 08:57:52,417 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 08:57:52,417 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:57:48" (1/3) ... [2023-11-23 08:57:52,418 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6636de21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:57:52, skipping insertion in model container [2023-11-23 08:57:52,418 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:57:50" (2/3) ... [2023-11-23 08:57:52,418 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6636de21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:57:52, skipping insertion in model container [2023-11-23 08:57:52,419 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:57:52" (3/3) ... [2023-11-23 08:57:52,420 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_priority_queue_init_dynamic_harness-1.i [2023-11-23 08:57:52,435 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 08:57:52,435 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 08:57:52,476 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 08:57:52,482 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;@143a376c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 08:57:52,482 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 08:57:52,486 INFO L276 IsEmpty]: Start isEmpty. Operand has 186 states, 114 states have (on average 1.2982456140350878) internal successors, (148), 114 states have internal predecessors, (148), 56 states have call successors, (56), 16 states have call predecessors, (56), 16 states have return successors, (56), 56 states have call predecessors, (56), 56 states have call successors, (56) [2023-11-23 08:57:52,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-11-23 08:57:52,499 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 08:57:52,500 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 3, 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] [2023-11-23 08:57:52,500 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 08:57:52,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 08:57:52,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1451426564, now seen corresponding path program 1 times [2023-11-23 08:57:52,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 08:57:52,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071240611] [2023-11-23 08:57:52,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:57:52,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 08:57:52,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:57:53,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 08:57:53,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071240611] [2023-11-23 08:57:53,091 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-23 08:57:53,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139761424] [2023-11-23 08:57:53,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:57:53,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 08:57:53,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 08:57:53,093 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 08:57:53,111 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 08:57:53,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:57:53,663 INFO L262 TraceCheckSpWp]: Trace formula consists of 2214 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-23 08:57:53,671 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 08:57:53,718 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2023-11-23 08:57:53,719 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 08:57:53,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139761424] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 08:57:53,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 08:57:53,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 08:57:53,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189255212] [2023-11-23 08:57:53,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 08:57:53,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-23 08:57:53,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 08:57:53,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-23 08:57:53,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 08:57:53,762 INFO L87 Difference]: Start difference. First operand has 186 states, 114 states have (on average 1.2982456140350878) internal successors, (148), 114 states have internal predecessors, (148), 56 states have call successors, (56), 16 states have call predecessors, (56), 16 states have return successors, (56), 56 states have call predecessors, (56), 56 states have call successors, (56) Second operand has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2023-11-23 08:57:53,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 08:57:53,949 INFO L93 Difference]: Finished difference Result 364 states and 548 transitions. [2023-11-23 08:57:53,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-23 08:57:53,951 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 103 [2023-11-23 08:57:53,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 08:57:53,960 INFO L225 Difference]: With dead ends: 364 [2023-11-23 08:57:53,960 INFO L226 Difference]: Without dead ends: 182 [2023-11-23 08:57:53,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 08:57:53,968 INFO L413 NwaCegarLoop]: 235 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 08:57:53,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 235 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 08:57:53,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2023-11-23 08:57:54,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2023-11-23 08:57:54,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 109 states have (on average 1.2568807339449541) internal successors, (137), 111 states have internal predecessors, (137), 56 states have call successors, (56), 16 states have call predecessors, (56), 16 states have return successors, (54), 54 states have call predecessors, (54), 54 states have call successors, (54) [2023-11-23 08:57:54,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 247 transitions. [2023-11-23 08:57:54,017 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 247 transitions. Word has length 103 [2023-11-23 08:57:54,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 08:57:54,018 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 247 transitions. [2023-11-23 08:57:54,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2023-11-23 08:57:54,019 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 247 transitions. [2023-11-23 08:57:54,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-11-23 08:57:54,022 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 08:57:54,022 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 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] [2023-11-23 08:57:54,044 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 08:57:54,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-23 08:57:54,239 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 08:57:54,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 08:57:54,240 INFO L85 PathProgramCache]: Analyzing trace with hash -453657233, now seen corresponding path program 1 times [2023-11-23 08:57:54,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 08:57:54,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786003689] [2023-11-23 08:57:54,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:57:54,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 08:57:54,451 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 08:57:54,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1735279052] [2023-11-23 08:57:54,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:57:54,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 08:57:54,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 08:57:54,453 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 08:57:54,469 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 08:57:55,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:57:55,067 INFO L262 TraceCheckSpWp]: Trace formula consists of 2364 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-23 08:57:55,073 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 08:57:55,295 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-11-23 08:57:55,295 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 08:57:55,462 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2023-11-23 08:57:55,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 08:57:55,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786003689] [2023-11-23 08:57:55,463 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 08:57:55,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735279052] [2023-11-23 08:57:55,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735279052] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-23 08:57:55,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 08:57:55,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2023-11-23 08:57:55,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714693107] [2023-11-23 08:57:55,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 08:57:55,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 08:57:55,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 08:57:55,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 08:57:55,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2023-11-23 08:57:55,469 INFO L87 Difference]: Start difference. First operand 182 states and 247 transitions. Second operand has 5 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) [2023-11-23 08:57:55,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 08:57:55,753 INFO L93 Difference]: Finished difference Result 190 states and 255 transitions. [2023-11-23 08:57:55,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 08:57:55,753 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) Word has length 133 [2023-11-23 08:57:55,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 08:57:55,756 INFO L225 Difference]: With dead ends: 190 [2023-11-23 08:57:55,756 INFO L226 Difference]: Without dead ends: 188 [2023-11-23 08:57:55,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-11-23 08:57:55,758 INFO L413 NwaCegarLoop]: 231 mSDtfsCounter, 4 mSDsluCounter, 668 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 899 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 08:57:55,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 899 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 08:57:55,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2023-11-23 08:57:55,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 187. [2023-11-23 08:57:55,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 112 states have (on average 1.25) internal successors, (140), 115 states have internal predecessors, (140), 57 states have call successors, (57), 17 states have call predecessors, (57), 17 states have return successors, (55), 54 states have call predecessors, (55), 55 states have call successors, (55) [2023-11-23 08:57:55,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 252 transitions. [2023-11-23 08:57:55,779 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 252 transitions. Word has length 133 [2023-11-23 08:57:55,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 08:57:55,780 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 252 transitions. [2023-11-23 08:57:55,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) [2023-11-23 08:57:55,781 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 252 transitions. [2023-11-23 08:57:55,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-11-23 08:57:55,787 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 08:57:55,787 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 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] [2023-11-23 08:57:55,807 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 08:57:56,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-23 08:57:56,007 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 08:57:56,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 08:57:56,008 INFO L85 PathProgramCache]: Analyzing trace with hash -451810191, now seen corresponding path program 1 times [2023-11-23 08:57:56,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 08:57:56,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057642823] [2023-11-23 08:57:56,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:57:56,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 08:57:56,084 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 08:57:56,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1177295777] [2023-11-23 08:57:56,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:57:56,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 08:57:56,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 08:57:56,086 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 08:57:56,101 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 08:57:56,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:57:56,551 INFO L262 TraceCheckSpWp]: Trace formula consists of 2369 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-23 08:57:56,556 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 08:57:56,594 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 148 proven. 0 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2023-11-23 08:57:56,595 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 08:57:56,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 08:57:56,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057642823] [2023-11-23 08:57:56,596 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 08:57:56,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177295777] [2023-11-23 08:57:56,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177295777] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 08:57:56,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 08:57:56,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 08:57:56,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542523767] [2023-11-23 08:57:56,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 08:57:56,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 08:57:56,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 08:57:56,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 08:57:56,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 08:57:56,599 INFO L87 Difference]: Start difference. First operand 187 states and 252 transitions. Second operand has 6 states, 5 states have (on average 10.2) internal successors, (51), 6 states have internal predecessors, (51), 4 states have call successors, (26), 2 states have call predecessors, (26), 4 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2023-11-23 08:57:56,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 08:57:56,967 INFO L93 Difference]: Finished difference Result 358 states and 477 transitions. [2023-11-23 08:57:56,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 08:57:56,971 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.2) internal successors, (51), 6 states have internal predecessors, (51), 4 states have call successors, (26), 2 states have call predecessors, (26), 4 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) Word has length 133 [2023-11-23 08:57:56,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 08:57:56,977 INFO L225 Difference]: With dead ends: 358 [2023-11-23 08:57:56,978 INFO L226 Difference]: Without dead ends: 187 [2023-11-23 08:57:56,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-23 08:57:56,985 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 9 mSDsluCounter, 887 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 1112 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 08:57:56,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 1112 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 08:57:56,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2023-11-23 08:57:57,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2023-11-23 08:57:57,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 112 states have (on average 1.2410714285714286) internal successors, (139), 115 states have internal predecessors, (139), 57 states have call successors, (57), 17 states have call predecessors, (57), 17 states have return successors, (55), 54 states have call predecessors, (55), 55 states have call successors, (55) [2023-11-23 08:57:57,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 251 transitions. [2023-11-23 08:57:57,018 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 251 transitions. Word has length 133 [2023-11-23 08:57:57,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 08:57:57,019 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 251 transitions. [2023-11-23 08:57:57,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.2) internal successors, (51), 6 states have internal predecessors, (51), 4 states have call successors, (26), 2 states have call predecessors, (26), 4 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2023-11-23 08:57:57,020 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 251 transitions. [2023-11-23 08:57:57,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-11-23 08:57:57,027 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 08:57:57,028 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 3, 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 08:57:57,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 08:57:57,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 08:57:57,244 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 08:57:57,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 08:57:57,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1459435135, now seen corresponding path program 1 times [2023-11-23 08:57:57,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 08:57:57,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047307182] [2023-11-23 08:57:57,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:57:57,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 08:57:57,314 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 08:57:57,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [209451902] [2023-11-23 08:57:57,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:57:57,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 08:57:57,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 08:57:57,316 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 08:57:57,332 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 08:57:57,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:57:57,791 INFO L262 TraceCheckSpWp]: Trace formula consists of 2385 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 08:57:57,795 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 08:57:57,810 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 145 proven. 0 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2023-11-23 08:57:57,810 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 08:57:57,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 08:57:57,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047307182] [2023-11-23 08:57:57,812 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 08:57:57,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209451902] [2023-11-23 08:57:57,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209451902] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 08:57:57,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 08:57:57,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 08:57:57,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182872494] [2023-11-23 08:57:57,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 08:57:57,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 08:57:57,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 08:57:57,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 08:57:57,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 08:57:57,815 INFO L87 Difference]: Start difference. First operand 187 states and 251 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2023-11-23 08:57:58,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 08:57:58,013 INFO L93 Difference]: Finished difference Result 355 states and 475 transitions. [2023-11-23 08:57:58,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 08:57:58,013 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 137 [2023-11-23 08:57:58,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 08:57:58,017 INFO L225 Difference]: With dead ends: 355 [2023-11-23 08:57:58,017 INFO L226 Difference]: Without dead ends: 188 [2023-11-23 08:57:58,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 08:57:58,018 INFO L413 NwaCegarLoop]: 230 mSDtfsCounter, 0 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 08:57:58,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 456 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 08:57:58,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2023-11-23 08:57:58,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2023-11-23 08:57:58,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 113 states have (on average 1.238938053097345) internal successors, (140), 116 states have internal predecessors, (140), 57 states have call successors, (57), 17 states have call predecessors, (57), 17 states have return successors, (55), 54 states have call predecessors, (55), 55 states have call successors, (55) [2023-11-23 08:57:58,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 252 transitions. [2023-11-23 08:57:58,041 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 252 transitions. Word has length 137 [2023-11-23 08:57:58,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 08:57:58,042 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 252 transitions. [2023-11-23 08:57:58,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2023-11-23 08:57:58,042 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 252 transitions. [2023-11-23 08:57:58,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-11-23 08:57:58,046 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 08:57:58,046 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 3, 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 08:57:58,072 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 08:57:58,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 08:57:58,260 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 08:57:58,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 08:57:58,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1483058511, now seen corresponding path program 1 times [2023-11-23 08:57:58,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 08:57:58,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546194838] [2023-11-23 08:57:58,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:57:58,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 08:57:58,396 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 08:57:58,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [873987642] [2023-11-23 08:57:58,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:57:58,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 08:57:58,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 08:57:58,409 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 08:57:58,424 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 08:57:58,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:57:58,916 INFO L262 TraceCheckSpWp]: Trace formula consists of 2423 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-23 08:57:58,920 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 08:57:58,982 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 153 proven. 1 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2023-11-23 08:57:58,982 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 08:57:59,198 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2023-11-23 08:57:59,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 08:57:59,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546194838] [2023-11-23 08:57:59,198 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 08:57:59,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873987642] [2023-11-23 08:57:59,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873987642] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 08:57:59,199 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 08:57:59,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2023-11-23 08:57:59,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365141678] [2023-11-23 08:57:59,199 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 08:57:59,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-23 08:57:59,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 08:57:59,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-23 08:57:59,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-11-23 08:57:59,201 INFO L87 Difference]: Start difference. First operand 188 states and 252 transitions. Second operand has 13 states, 11 states have (on average 6.454545454545454) internal successors, (71), 13 states have internal predecessors, (71), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2023-11-23 08:57:59,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 08:57:59,784 INFO L93 Difference]: Finished difference Result 362 states and 480 transitions. [2023-11-23 08:57:59,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 08:57:59,785 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 6.454545454545454) internal successors, (71), 13 states have internal predecessors, (71), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) Word has length 139 [2023-11-23 08:57:59,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 08:57:59,786 INFO L225 Difference]: With dead ends: 362 [2023-11-23 08:57:59,786 INFO L226 Difference]: Without dead ends: 189 [2023-11-23 08:57:59,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-11-23 08:57:59,788 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 15 mSDsluCounter, 1772 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 1997 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 08:57:59,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 1997 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 08:57:59,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2023-11-23 08:57:59,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2023-11-23 08:57:59,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 114 states have (on average 1.236842105263158) internal successors, (141), 117 states have internal predecessors, (141), 57 states have call successors, (57), 17 states have call predecessors, (57), 17 states have return successors, (55), 54 states have call predecessors, (55), 55 states have call successors, (55) [2023-11-23 08:57:59,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 253 transitions. [2023-11-23 08:57:59,810 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 253 transitions. Word has length 139 [2023-11-23 08:57:59,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 08:57:59,811 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 253 transitions. [2023-11-23 08:57:59,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 6.454545454545454) internal successors, (71), 13 states have internal predecessors, (71), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2023-11-23 08:57:59,811 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 253 transitions. [2023-11-23 08:57:59,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2023-11-23 08:57:59,812 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 08:57:59,812 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 4, 3, 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 08:57:59,831 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-23 08:58:00,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 08:58:00,028 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 08:58:00,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 08:58:00,029 INFO L85 PathProgramCache]: Analyzing trace with hash -483038975, now seen corresponding path program 2 times [2023-11-23 08:58:00,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 08:58:00,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969829314] [2023-11-23 08:58:00,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:58:00,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 08:58:00,088 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 08:58:00,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1100983049] [2023-11-23 08:58:00,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 08:58:00,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 08:58:00,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 08:58:00,090 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 08:58:00,111 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 08:58:00,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 08:58:00,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 08:58:00,682 INFO L262 TraceCheckSpWp]: Trace formula consists of 2461 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-23 08:58:00,686 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 08:58:00,805 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 158 proven. 3 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2023-11-23 08:58:00,805 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 08:58:01,138 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2023-11-23 08:58:01,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 08:58:01,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969829314] [2023-11-23 08:58:01,139 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 08:58:01,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100983049] [2023-11-23 08:58:01,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100983049] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 08:58:01,139 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 08:58:01,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2023-11-23 08:58:01,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738627540] [2023-11-23 08:58:01,140 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 08:58:01,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-23 08:58:01,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 08:58:01,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-23 08:58:01,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-11-23 08:58:01,142 INFO L87 Difference]: Start difference. First operand 189 states and 253 transitions. Second operand has 15 states, 13 states have (on average 5.615384615384615) internal successors, (73), 15 states have internal predecessors, (73), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2023-11-23 08:58:01,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 08:58:01,809 INFO L93 Difference]: Finished difference Result 364 states and 482 transitions. [2023-11-23 08:58:01,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-23 08:58:01,810 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 5.615384615384615) internal successors, (73), 15 states have internal predecessors, (73), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) Word has length 141 [2023-11-23 08:58:01,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 08:58:01,811 INFO L225 Difference]: With dead ends: 364 [2023-11-23 08:58:01,811 INFO L226 Difference]: Without dead ends: 190 [2023-11-23 08:58:01,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2023-11-23 08:58:01,813 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 16 mSDsluCounter, 1550 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 1775 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 08:58:01,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 1775 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 08:58:01,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2023-11-23 08:58:01,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2023-11-23 08:58:01,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 115 states have (on average 1.2347826086956522) internal successors, (142), 118 states have internal predecessors, (142), 57 states have call successors, (57), 17 states have call predecessors, (57), 17 states have return successors, (55), 54 states have call predecessors, (55), 55 states have call successors, (55) [2023-11-23 08:58:01,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 254 transitions. [2023-11-23 08:58:01,822 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 254 transitions. Word has length 141 [2023-11-23 08:58:01,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 08:58:01,823 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 254 transitions. [2023-11-23 08:58:01,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 5.615384615384615) internal successors, (73), 15 states have internal predecessors, (73), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2023-11-23 08:58:01,823 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 254 transitions. [2023-11-23 08:58:01,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2023-11-23 08:58:01,824 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 08:58:01,824 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 6, 3, 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 08:58:01,846 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 08:58:02,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 08:58:02,040 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 08:58:02,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 08:58:02,041 INFO L85 PathProgramCache]: Analyzing trace with hash -482289329, now seen corresponding path program 3 times [2023-11-23 08:58:02,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 08:58:02,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663592016] [2023-11-23 08:58:02,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:58:02,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 08:58:02,131 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 08:58:02,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [824783304] [2023-11-23 08:58:02,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 08:58:02,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 08:58:02,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 08:58:02,133 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 08:58:02,224 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 08:58:03,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-23 08:58:03,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 08:58:03,809 INFO L262 TraceCheckSpWp]: Trace formula consists of 2082 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-23 08:58:03,813 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 08:58:04,181 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 35 proven. 6 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2023-11-23 08:58:04,181 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 08:58:04,580 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 24 proven. 6 refuted. 0 times theorem prover too weak. 285 trivial. 0 not checked. [2023-11-23 08:58:04,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 08:58:04,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663592016] [2023-11-23 08:58:04,581 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 08:58:04,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824783304] [2023-11-23 08:58:04,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824783304] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 08:58:04,581 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 08:58:04,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2023-11-23 08:58:04,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002904196] [2023-11-23 08:58:04,582 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 08:58:04,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-23 08:58:04,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 08:58:04,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-23 08:58:04,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2023-11-23 08:58:04,584 INFO L87 Difference]: Start difference. First operand 190 states and 254 transitions. Second operand has 17 states, 15 states have (on average 4.266666666666667) internal successors, (64), 17 states have internal predecessors, (64), 6 states have call successors, (30), 2 states have call predecessors, (30), 5 states have return successors, (30), 6 states have call predecessors, (30), 6 states have call successors, (30) [2023-11-23 08:58:05,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 08:58:05,707 INFO L93 Difference]: Finished difference Result 366 states and 484 transitions. [2023-11-23 08:58:05,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-23 08:58:05,709 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 4.266666666666667) internal successors, (64), 17 states have internal predecessors, (64), 6 states have call successors, (30), 2 states have call predecessors, (30), 5 states have return successors, (30), 6 states have call predecessors, (30), 6 states have call successors, (30) Word has length 143 [2023-11-23 08:58:05,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 08:58:05,711 INFO L225 Difference]: With dead ends: 366 [2023-11-23 08:58:05,711 INFO L226 Difference]: Without dead ends: 191 [2023-11-23 08:58:05,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2023-11-23 08:58:05,712 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 16 mSDsluCounter, 1770 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 1995 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-23 08:58:05,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 1995 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-23 08:58:05,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2023-11-23 08:58:05,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2023-11-23 08:58:05,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 116 states have (on average 1.2327586206896552) internal successors, (143), 119 states have internal predecessors, (143), 57 states have call successors, (57), 17 states have call predecessors, (57), 17 states have return successors, (55), 54 states have call predecessors, (55), 55 states have call successors, (55) [2023-11-23 08:58:05,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 255 transitions. [2023-11-23 08:58:05,744 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 255 transitions. Word has length 143 [2023-11-23 08:58:05,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 08:58:05,745 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 255 transitions. [2023-11-23 08:58:05,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 4.266666666666667) internal successors, (64), 17 states have internal predecessors, (64), 6 states have call successors, (30), 2 states have call predecessors, (30), 5 states have return successors, (30), 6 states have call predecessors, (30), 6 states have call successors, (30) [2023-11-23 08:58:05,746 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 255 transitions. [2023-11-23 08:58:05,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-11-23 08:58:05,748 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 08:58:05,749 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 8, 3, 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 08:58:05,776 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 08:58:05,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 08:58:05,968 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 08:58:05,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 08:58:05,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1802549377, now seen corresponding path program 4 times [2023-11-23 08:58:05,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 08:58:05,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091329360] [2023-11-23 08:58:05,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:58:05,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 08:58:06,123 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 08:58:06,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [728714790] [2023-11-23 08:58:06,123 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-23 08:58:06,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 08:58:06,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 08:58:06,140 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 08:58:06,216 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 08:58:06,988 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-23 08:58:06,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 08:58:07,016 INFO L262 TraceCheckSpWp]: Trace formula consists of 2537 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-23 08:58:07,020 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 08:58:07,213 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 174 proven. 10 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2023-11-23 08:58:07,213 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 08:58:07,767 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2023-11-23 08:58:07,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 08:58:07,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091329360] [2023-11-23 08:58:07,768 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 08:58:07,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728714790] [2023-11-23 08:58:07,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728714790] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 08:58:07,768 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 08:58:07,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2023-11-23 08:58:07,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024695796] [2023-11-23 08:58:07,769 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 08:58:07,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-23 08:58:07,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 08:58:07,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-23 08:58:07,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2023-11-23 08:58:07,771 INFO L87 Difference]: Start difference. First operand 191 states and 255 transitions. Second operand has 19 states, 17 states have (on average 4.529411764705882) internal successors, (77), 19 states have internal predecessors, (77), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2023-11-23 08:58:08,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 08:58:08,956 INFO L93 Difference]: Finished difference Result 368 states and 486 transitions. [2023-11-23 08:58:08,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-23 08:58:08,956 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 4.529411764705882) internal successors, (77), 19 states have internal predecessors, (77), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) Word has length 145 [2023-11-23 08:58:08,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 08:58:08,958 INFO L225 Difference]: With dead ends: 368 [2023-11-23 08:58:08,958 INFO L226 Difference]: Without dead ends: 192 [2023-11-23 08:58:08,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2023-11-23 08:58:08,960 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 15 mSDsluCounter, 2214 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 2439 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-23 08:58:08,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 2439 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-23 08:58:08,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2023-11-23 08:58:08,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2023-11-23 08:58:08,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 117 states have (on average 1.2307692307692308) internal successors, (144), 120 states have internal predecessors, (144), 57 states have call successors, (57), 17 states have call predecessors, (57), 17 states have return successors, (55), 54 states have call predecessors, (55), 55 states have call successors, (55) [2023-11-23 08:58:08,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 256 transitions. [2023-11-23 08:58:08,968 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 256 transitions. Word has length 145 [2023-11-23 08:58:08,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 08:58:08,969 INFO L495 AbstractCegarLoop]: Abstraction has 192 states and 256 transitions. [2023-11-23 08:58:08,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 4.529411764705882) internal successors, (77), 19 states have internal predecessors, (77), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2023-11-23 08:58:08,969 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 256 transitions. [2023-11-23 08:58:08,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2023-11-23 08:58:08,970 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 08:58:08,971 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 10, 3, 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 08:58:08,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-23 08:58:09,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-23 08:58:09,184 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 08:58:09,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 08:58:09,185 INFO L85 PathProgramCache]: Analyzing trace with hash -238054065, now seen corresponding path program 5 times [2023-11-23 08:58:09,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 08:58:09,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105129968] [2023-11-23 08:58:09,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:58:09,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 08:58:09,253 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 08:58:09,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2021196974] [2023-11-23 08:58:09,253 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-23 08:58:09,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 08:58:09,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 08:58:09,255 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 08:58:09,262 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 08:58:10,286 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-11-23 08:58:10,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 08:58:10,290 INFO L262 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-23 08:58:10,294 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 08:58:10,509 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 185 proven. 15 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-11-23 08:58:10,509 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 08:58:10,877 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2023-11-23 08:58:10,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 08:58:10,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105129968] [2023-11-23 08:58:10,878 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 08:58:10,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021196974] [2023-11-23 08:58:10,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021196974] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 08:58:10,878 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 08:58:10,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2023-11-23 08:58:10,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602309146] [2023-11-23 08:58:10,880 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 08:58:10,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-23 08:58:10,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 08:58:10,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-23 08:58:10,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2023-11-23 08:58:10,883 INFO L87 Difference]: Start difference. First operand 192 states and 256 transitions. Second operand has 21 states, 19 states have (on average 4.157894736842105) internal successors, (79), 21 states have internal predecessors, (79), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2023-11-23 08:58:12,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 08:58:12,208 INFO L93 Difference]: Finished difference Result 370 states and 488 transitions. [2023-11-23 08:58:12,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-23 08:58:12,209 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 4.157894736842105) internal successors, (79), 21 states have internal predecessors, (79), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) Word has length 147 [2023-11-23 08:58:12,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 08:58:12,212 INFO L225 Difference]: With dead ends: 370 [2023-11-23 08:58:12,213 INFO L226 Difference]: Without dead ends: 193 [2023-11-23 08:58:12,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 273 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2023-11-23 08:58:12,216 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 12 mSDsluCounter, 2434 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 2659 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-23 08:58:12,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 2659 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-23 08:58:12,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2023-11-23 08:58:12,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2023-11-23 08:58:12,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 118 states have (on average 1.228813559322034) internal successors, (145), 121 states have internal predecessors, (145), 57 states have call successors, (57), 17 states have call predecessors, (57), 17 states have return successors, (55), 54 states have call predecessors, (55), 55 states have call successors, (55) [2023-11-23 08:58:12,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 257 transitions. [2023-11-23 08:58:12,236 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 257 transitions. Word has length 147 [2023-11-23 08:58:12,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 08:58:12,237 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 257 transitions. [2023-11-23 08:58:12,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 4.157894736842105) internal successors, (79), 21 states have internal predecessors, (79), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2023-11-23 08:58:12,237 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 257 transitions. [2023-11-23 08:58:12,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-11-23 08:58:12,239 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 08:58:12,239 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 3, 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 08:58:12,261 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 08:58:12,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 08:58:12,458 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 08:58:12,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 08:58:12,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1719711745, now seen corresponding path program 6 times [2023-11-23 08:58:12,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 08:58:12,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808535772] [2023-11-23 08:58:12,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:58:12,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 08:58:12,600 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 08:58:12,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [773550378] [2023-11-23 08:58:12,601 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-23 08:58:12,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 08:58:12,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 08:58:12,616 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 08:58:12,645 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 08:58:26,288 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2023-11-23 08:58:26,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 08:58:26,306 INFO L262 TraceCheckSpWp]: Trace formula consists of 2386 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-23 08:58:26,311 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 08:58:26,524 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 68 proven. 21 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2023-11-23 08:58:26,524 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 08:58:26,911 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2023-11-23 08:58:26,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 08:58:26,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808535772] [2023-11-23 08:58:26,911 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 08:58:26,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773550378] [2023-11-23 08:58:26,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773550378] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 08:58:26,912 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 08:58:26,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2023-11-23 08:58:26,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792455967] [2023-11-23 08:58:26,912 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 08:58:26,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-23 08:58:26,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 08:58:26,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-23 08:58:26,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2023-11-23 08:58:26,914 INFO L87 Difference]: Start difference. First operand 193 states and 257 transitions. Second operand has 23 states, 21 states have (on average 3.3333333333333335) internal successors, (70), 23 states have internal predecessors, (70), 6 states have call successors, (30), 2 states have call predecessors, (30), 5 states have return successors, (30), 6 states have call predecessors, (30), 6 states have call successors, (30) [2023-11-23 08:58:28,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 08:58:28,243 INFO L93 Difference]: Finished difference Result 372 states and 490 transitions. [2023-11-23 08:58:28,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-23 08:58:28,244 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 3.3333333333333335) internal successors, (70), 23 states have internal predecessors, (70), 6 states have call successors, (30), 2 states have call predecessors, (30), 5 states have return successors, (30), 6 states have call predecessors, (30), 6 states have call successors, (30) Word has length 149 [2023-11-23 08:58:28,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 08:58:28,246 INFO L225 Difference]: With dead ends: 372 [2023-11-23 08:58:28,246 INFO L226 Difference]: Without dead ends: 194 [2023-11-23 08:58:28,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 275 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2023-11-23 08:58:28,247 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 16 mSDsluCounter, 2656 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 2881 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-23 08:58:28,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 2881 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-23 08:58:28,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2023-11-23 08:58:28,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 194. [2023-11-23 08:58:28,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 119 states have (on average 1.226890756302521) internal successors, (146), 122 states have internal predecessors, (146), 57 states have call successors, (57), 17 states have call predecessors, (57), 17 states have return successors, (55), 54 states have call predecessors, (55), 55 states have call successors, (55) [2023-11-23 08:58:28,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 258 transitions. [2023-11-23 08:58:28,264 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 258 transitions. Word has length 149 [2023-11-23 08:58:28,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 08:58:28,266 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 258 transitions. [2023-11-23 08:58:28,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 3.3333333333333335) internal successors, (70), 23 states have internal predecessors, (70), 6 states have call successors, (30), 2 states have call predecessors, (30), 5 states have return successors, (30), 6 states have call predecessors, (30), 6 states have call successors, (30) [2023-11-23 08:58:28,266 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 258 transitions. [2023-11-23 08:58:28,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2023-11-23 08:58:28,268 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 08:58:28,268 INFO L195 NwaCegarLoop]: trace histogram [14, 12, 12, 12, 3, 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 08:58:28,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-23 08:58:28,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-23 08:58:28,487 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 08:58:28,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 08:58:28,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1146756785, now seen corresponding path program 7 times [2023-11-23 08:58:28,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 08:58:28,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573012135] [2023-11-23 08:58:28,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:58:28,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 08:58:28,640 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 08:58:28,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [673447881] [2023-11-23 08:58:28,640 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-23 08:58:28,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 08:58:28,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 08:58:28,644 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 08:58:28,645 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 08:58:29,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:58:29,900 INFO L262 TraceCheckSpWp]: Trace formula consists of 2651 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-23 08:58:29,905 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 08:58:30,187 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 213 proven. 28 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2023-11-23 08:58:30,187 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 08:58:30,649 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2023-11-23 08:58:30,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 08:58:30,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573012135] [2023-11-23 08:58:30,649 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 08:58:30,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673447881] [2023-11-23 08:58:30,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673447881] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 08:58:30,649 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 08:58:30,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2023-11-23 08:58:30,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678542185] [2023-11-23 08:58:30,650 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 08:58:30,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-23 08:58:30,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 08:58:30,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-23 08:58:30,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2023-11-23 08:58:30,651 INFO L87 Difference]: Start difference. First operand 194 states and 258 transitions. Second operand has 25 states, 23 states have (on average 3.608695652173913) internal successors, (83), 25 states have internal predecessors, (83), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2023-11-23 08:58:31,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 08:58:31,975 INFO L93 Difference]: Finished difference Result 374 states and 492 transitions. [2023-11-23 08:58:31,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-23 08:58:31,976 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 3.608695652173913) internal successors, (83), 25 states have internal predecessors, (83), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) Word has length 151 [2023-11-23 08:58:31,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 08:58:31,979 INFO L225 Difference]: With dead ends: 374 [2023-11-23 08:58:31,979 INFO L226 Difference]: Without dead ends: 195 [2023-11-23 08:58:31,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 277 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=147, Invalid=609, Unknown=0, NotChecked=0, Total=756 [2023-11-23 08:58:31,981 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 16 mSDsluCounter, 2432 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 2657 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-23 08:58:31,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 2657 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-23 08:58:31,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2023-11-23 08:58:31,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2023-11-23 08:58:31,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 120 states have (on average 1.225) internal successors, (147), 123 states have internal predecessors, (147), 57 states have call successors, (57), 17 states have call predecessors, (57), 17 states have return successors, (55), 54 states have call predecessors, (55), 55 states have call successors, (55) [2023-11-23 08:58:31,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 259 transitions. [2023-11-23 08:58:31,994 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 259 transitions. Word has length 151 [2023-11-23 08:58:31,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 08:58:31,997 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 259 transitions. [2023-11-23 08:58:31,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 3.608695652173913) internal successors, (83), 25 states have internal predecessors, (83), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2023-11-23 08:58:31,997 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 259 transitions. [2023-11-23 08:58:31,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2023-11-23 08:58:31,998 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 08:58:31,998 INFO L195 NwaCegarLoop]: trace histogram [16, 12, 12, 12, 3, 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 08:58:32,048 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 08:58:32,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-23 08:58:32,216 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 08:58:32,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 08:58:32,217 INFO L85 PathProgramCache]: Analyzing trace with hash 439445377, now seen corresponding path program 8 times [2023-11-23 08:58:32,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 08:58:32,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759331469] [2023-11-23 08:58:32,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:58:32,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 08:58:32,389 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 08:58:32,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [426357879] [2023-11-23 08:58:32,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 08:58:32,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 08:58:32,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 08:58:32,405 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 08:58:32,485 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 08:58:33,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 08:58:33,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 08:58:33,858 INFO L262 TraceCheckSpWp]: Trace formula consists of 2689 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-23 08:58:33,862 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 08:58:34,151 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 230 proven. 36 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2023-11-23 08:58:34,152 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 08:58:34,693 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 0 proven. 125 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2023-11-23 08:58:34,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 08:58:34,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759331469] [2023-11-23 08:58:34,694 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 08:58:34,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426357879] [2023-11-23 08:58:34,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426357879] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 08:58:34,694 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 08:58:34,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2023-11-23 08:58:34,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483227551] [2023-11-23 08:58:34,694 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 08:58:34,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-23 08:58:34,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 08:58:34,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-23 08:58:34,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2023-11-23 08:58:34,696 INFO L87 Difference]: Start difference. First operand 195 states and 259 transitions. Second operand has 27 states, 25 states have (on average 3.4) internal successors, (85), 27 states have internal predecessors, (85), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2023-11-23 08:58:36,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 08:58:36,141 INFO L93 Difference]: Finished difference Result 376 states and 494 transitions. [2023-11-23 08:58:36,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-23 08:58:36,142 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 3.4) internal successors, (85), 27 states have internal predecessors, (85), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) Word has length 153 [2023-11-23 08:58:36,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 08:58:36,144 INFO L225 Difference]: With dead ends: 376 [2023-11-23 08:58:36,144 INFO L226 Difference]: Without dead ends: 196 [2023-11-23 08:58:36,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 279 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=165, Invalid=705, Unknown=0, NotChecked=0, Total=870 [2023-11-23 08:58:36,146 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 16 mSDsluCounter, 3097 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 3322 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-23 08:58:36,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 3322 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-23 08:58:36,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2023-11-23 08:58:36,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2023-11-23 08:58:36,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 121 states have (on average 1.2231404958677685) internal successors, (148), 124 states have internal predecessors, (148), 57 states have call successors, (57), 17 states have call predecessors, (57), 17 states have return successors, (55), 54 states have call predecessors, (55), 55 states have call successors, (55) [2023-11-23 08:58:36,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 260 transitions. [2023-11-23 08:58:36,159 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 260 transitions. Word has length 153 [2023-11-23 08:58:36,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 08:58:36,160 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 260 transitions. [2023-11-23 08:58:36,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 3.4) internal successors, (85), 27 states have internal predecessors, (85), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2023-11-23 08:58:36,160 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 260 transitions. [2023-11-23 08:58:36,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2023-11-23 08:58:36,161 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 08:58:36,162 INFO L195 NwaCegarLoop]: trace histogram [18, 12, 12, 12, 3, 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 08:58:36,186 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-23 08:58:36,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-23 08:58:36,372 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 08:58:36,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 08:58:36,373 INFO L85 PathProgramCache]: Analyzing trace with hash 123190607, now seen corresponding path program 9 times [2023-11-23 08:58:36,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 08:58:36,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752786645] [2023-11-23 08:58:36,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:58:36,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 08:58:36,454 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 08:58:36,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1551936277] [2023-11-23 08:58:36,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 08:58:36,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 08:58:36,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 08:58:36,456 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 08:58:36,473 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 08:59:14,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-11-23 08:59:14,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 08:59:14,472 INFO L262 TraceCheckSpWp]: Trace formula consists of 2274 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-23 08:59:14,477 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 08:59:14,647 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 119 proven. 45 refuted. 0 times theorem prover too weak. 313 trivial. 0 not checked. [2023-11-23 08:59:14,647 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 08:59:15,102 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 108 proven. 45 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2023-11-23 08:59:15,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 08:59:15,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752786645] [2023-11-23 08:59:15,102 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 08:59:15,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551936277] [2023-11-23 08:59:15,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551936277] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 08:59:15,103 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 08:59:15,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2023-11-23 08:59:15,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910172037] [2023-11-23 08:59:15,103 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 08:59:15,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-23 08:59:15,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 08:59:15,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-23 08:59:15,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2023-11-23 08:59:15,105 INFO L87 Difference]: Start difference. First operand 196 states and 260 transitions. Second operand has 29 states, 27 states have (on average 2.814814814814815) internal successors, (76), 29 states have internal predecessors, (76), 6 states have call successors, (30), 2 states have call predecessors, (30), 5 states have return successors, (30), 6 states have call predecessors, (30), 6 states have call successors, (30) [2023-11-23 08:59:16,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 08:59:16,713 INFO L93 Difference]: Finished difference Result 378 states and 496 transitions. [2023-11-23 08:59:16,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-23 08:59:16,713 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 2.814814814814815) internal successors, (76), 29 states have internal predecessors, (76), 6 states have call successors, (30), 2 states have call predecessors, (30), 5 states have return successors, (30), 6 states have call predecessors, (30), 6 states have call successors, (30) Word has length 155 [2023-11-23 08:59:16,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 08:59:16,715 INFO L225 Difference]: With dead ends: 378 [2023-11-23 08:59:16,715 INFO L226 Difference]: Without dead ends: 197 [2023-11-23 08:59:16,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 281 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=184, Invalid=808, Unknown=0, NotChecked=0, Total=992 [2023-11-23 08:59:16,717 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 16 mSDsluCounter, 3317 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 3542 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-23 08:59:16,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 3542 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-23 08:59:16,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2023-11-23 08:59:16,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2023-11-23 08:59:16,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 122 states have (on average 1.221311475409836) internal successors, (149), 125 states have internal predecessors, (149), 57 states have call successors, (57), 17 states have call predecessors, (57), 17 states have return successors, (55), 54 states have call predecessors, (55), 55 states have call successors, (55) [2023-11-23 08:59:16,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 261 transitions. [2023-11-23 08:59:16,725 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 261 transitions. Word has length 155 [2023-11-23 08:59:16,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 08:59:16,725 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 261 transitions. [2023-11-23 08:59:16,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 2.814814814814815) internal successors, (76), 29 states have internal predecessors, (76), 6 states have call successors, (30), 2 states have call predecessors, (30), 5 states have return successors, (30), 6 states have call predecessors, (30), 6 states have call successors, (30) [2023-11-23 08:59:16,726 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 261 transitions. [2023-11-23 08:59:16,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2023-11-23 08:59:16,727 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 08:59:16,727 INFO L195 NwaCegarLoop]: trace histogram [20, 12, 12, 12, 3, 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 08:59:16,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-23 08:59:16,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-23 08:59:16,952 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 08:59:16,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 08:59:16,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1387346175, now seen corresponding path program 10 times [2023-11-23 08:59:16,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 08:59:16,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174516731] [2023-11-23 08:59:16,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:59:16,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 08:59:17,045 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 08:59:17,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1467182429] [2023-11-23 08:59:17,060 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-23 08:59:17,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 08:59:17,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 08:59:17,061 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 08:59:17,062 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 08:59:18,297 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-23 08:59:18,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 08:59:18,314 INFO L262 TraceCheckSpWp]: Trace formula consists of 2765 conjuncts, 128 conjunts are in the unsatisfiable core [2023-11-23 08:59:18,337 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 08:59:19,166 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 08:59:19,278 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 57 treesize of output 35 [2023-11-23 08:59:19,601 WARN L876 $PredicateComparison]: unable to prove that (exists ((|aws_mul_size_checked_aws_mul_u64_checked_~b#1| Int) (|aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| Int) (|aws_mul_size_checked_aws_mul_u64_checked_~a#1| Int)) (= (store |c_old(#memory_int)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_int)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) |c_aws_mul_size_checked_#in~r#1.offset| (* |aws_mul_size_checked_aws_mul_u64_checked_~b#1| |aws_mul_size_checked_aws_mul_u64_checked_~a#1|))) |c_#memory_int|)) is different from true [2023-11-23 08:59:19,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 08:59:19,614 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 23 treesize of output 22 [2023-11-23 08:59:19,932 INFO L134 CoverageAnalysis]: Checked inductivity of 518 backedges. 48 proven. 233 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2023-11-23 08:59:19,932 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 08:59:22,299 WARN L854 $PredicateComparison]: unable to prove that (forall ((|v_aws_mul_size_checked_aws_mul_u64_checked_~b#1_93| Int) (|v_aws_mul_size_checked_aws_mul_u64_checked_~r#1.base_91| Int) (|v_aws_mul_size_checked_aws_mul_u64_checked_~a#1_93| Int)) (= (mod (select (select (store |c_#memory_int| |v_aws_mul_size_checked_aws_mul_u64_checked_~r#1.base_91| (store (select |c_#memory_int| |v_aws_mul_size_checked_aws_mul_u64_checked_~r#1.base_91|) |c_ULTIMATE.start_aws_array_list_init_dynamic_~#allocation_size~0#1.offset| (* |v_aws_mul_size_checked_aws_mul_u64_checked_~a#1_93| |v_aws_mul_size_checked_aws_mul_u64_checked_~b#1_93|))) |c_ULTIMATE.start_aws_array_list_init_dynamic_~list#1.base|) (+ |c_ULTIMATE.start_aws_array_list_init_dynamic_~list#1.offset| 8)) 18446744073709551616) 0)) is different from false [2023-11-23 08:59:22,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 08:59:22,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174516731] [2023-11-23 08:59:22,308 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 08:59:22,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467182429] [2023-11-23 08:59:22,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467182429] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 08:59:22,308 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-23 08:59:22,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2023-11-23 08:59:22,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149255926] [2023-11-23 08:59:22,308 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-23 08:59:22,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-11-23 08:59:22,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 08:59:22,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-11-23 08:59:22,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1787, Unknown=2, NotChecked=170, Total=2070 [2023-11-23 08:59:22,310 INFO L87 Difference]: Start difference. First operand 197 states and 261 transitions. Second operand has 42 states, 37 states have (on average 2.0) internal successors, (74), 41 states have internal predecessors, (74), 12 states have call successors, (26), 4 states have call predecessors, (26), 6 states have return successors, (25), 9 states have call predecessors, (25), 11 states have call successors, (25) [2023-11-23 08:59:41,155 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 08:59:47,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 08:59:47,098 INFO L93 Difference]: Finished difference Result 550 states and 774 transitions. [2023-11-23 08:59:47,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-23 08:59:47,099 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 37 states have (on average 2.0) internal successors, (74), 41 states have internal predecessors, (74), 12 states have call successors, (26), 4 states have call predecessors, (26), 6 states have return successors, (25), 9 states have call predecessors, (25), 11 states have call successors, (25) Word has length 157 [2023-11-23 08:59:47,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 08:59:47,102 INFO L225 Difference]: With dead ends: 550 [2023-11-23 08:59:47,102 INFO L226 Difference]: Without dead ends: 455 [2023-11-23 08:59:47,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 129 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1426 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=389, Invalid=6097, Unknown=2, NotChecked=318, Total=6806 [2023-11-23 08:59:47,104 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 479 mSDsluCounter, 5051 mSDsCounter, 0 mSdLazyCounter, 5401 mSolverCounterSat, 369 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 516 SdHoareTripleChecker+Valid, 5221 SdHoareTripleChecker+Invalid, 6606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 369 IncrementalHoareTripleChecker+Valid, 5401 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 829 IncrementalHoareTripleChecker+Unchecked, 20.3s IncrementalHoareTripleChecker+Time [2023-11-23 08:59:47,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [516 Valid, 5221 Invalid, 6606 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [369 Valid, 5401 Invalid, 7 Unknown, 829 Unchecked, 20.3s Time] [2023-11-23 08:59:47,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2023-11-23 08:59:47,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 343. [2023-11-23 08:59:47,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 222 states have (on average 1.2522522522522523) internal successors, (278), 228 states have internal predecessors, (278), 88 states have call successors, (88), 31 states have call predecessors, (88), 32 states have return successors, (99), 83 states have call predecessors, (99), 84 states have call successors, (99) [2023-11-23 08:59:47,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 465 transitions. [2023-11-23 08:59:47,140 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 465 transitions. Word has length 157 [2023-11-23 08:59:47,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 08:59:47,141 INFO L495 AbstractCegarLoop]: Abstraction has 343 states and 465 transitions. [2023-11-23 08:59:47,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 37 states have (on average 2.0) internal successors, (74), 41 states have internal predecessors, (74), 12 states have call successors, (26), 4 states have call predecessors, (26), 6 states have return successors, (25), 9 states have call predecessors, (25), 11 states have call successors, (25) [2023-11-23 08:59:47,141 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 465 transitions. [2023-11-23 08:59:47,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2023-11-23 08:59:47,143 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 08:59:47,143 INFO L195 NwaCegarLoop]: trace histogram [20, 12, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 08:59:47,176 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 08:59:47,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 08:59:47,344 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 08:59:47,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 08:59:47,345 INFO L85 PathProgramCache]: Analyzing trace with hash -649036012, now seen corresponding path program 1 times [2023-11-23 08:59:47,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 08:59:47,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140618454] [2023-11-23 08:59:47,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:59:47,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 08:59:47,428 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 08:59:47,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [76352021] [2023-11-23 08:59:47,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:59:47,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 08:59:47,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 08:59:47,430 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 08:59:47,437 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 08:59:48,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:59:48,152 INFO L262 TraceCheckSpWp]: Trace formula consists of 2742 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-23 08:59:48,155 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 08:59:48,454 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 0 proven. 139 refuted. 0 times theorem prover too weak. 375 trivial. 0 not checked. [2023-11-23 08:59:48,454 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 08:59:48,812 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 514 trivial. 0 not checked. [2023-11-23 08:59:48,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 08:59:48,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140618454] [2023-11-23 08:59:48,813 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 08:59:48,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76352021] [2023-11-23 08:59:48,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76352021] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-23 08:59:48,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 08:59:48,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2023-11-23 08:59:48,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133368642] [2023-11-23 08:59:48,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 08:59:48,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 08:59:48,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 08:59:48,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 08:59:48,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-11-23 08:59:48,815 INFO L87 Difference]: Start difference. First operand 343 states and 465 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 1 states have call successors, (22) [2023-11-23 08:59:49,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 08:59:49,408 INFO L93 Difference]: Finished difference Result 561 states and 794 transitions. [2023-11-23 08:59:49,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 08:59:49,409 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 1 states have call successors, (22) Word has length 157 [2023-11-23 08:59:49,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 08:59:49,412 INFO L225 Difference]: With dead ends: 561 [2023-11-23 08:59:49,412 INFO L226 Difference]: Without dead ends: 349 [2023-11-23 08:59:49,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 303 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-11-23 08:59:49,414 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 3 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 652 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 08:59:49,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 652 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 08:59:49,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2023-11-23 08:59:49,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 345. [2023-11-23 08:59:49,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 224 states have (on average 1.25) internal successors, (280), 230 states have internal predecessors, (280), 88 states have call successors, (88), 31 states have call predecessors, (88), 32 states have return successors, (99), 83 states have call predecessors, (99), 84 states have call successors, (99) [2023-11-23 08:59:49,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 467 transitions. [2023-11-23 08:59:49,436 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 467 transitions. Word has length 157 [2023-11-23 08:59:49,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 08:59:49,436 INFO L495 AbstractCegarLoop]: Abstraction has 345 states and 467 transitions. [2023-11-23 08:59:49,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 1 states have call successors, (22) [2023-11-23 08:59:49,436 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 467 transitions. [2023-11-23 08:59:49,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2023-11-23 08:59:49,438 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 08:59:49,438 INFO L195 NwaCegarLoop]: trace histogram [20, 12, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 08:59:49,460 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-23 08:59:49,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-23 08:59:49,661 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 08:59:49,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 08:59:49,661 INFO L85 PathProgramCache]: Analyzing trace with hash 919026187, now seen corresponding path program 1 times [2023-11-23 08:59:49,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 08:59:49,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071171036] [2023-11-23 08:59:49,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:59:49,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 08:59:49,724 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 08:59:49,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1223681939] [2023-11-23 08:59:49,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:59:49,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 08:59:49,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 08:59:49,725 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 08:59:49,736 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 08:59:50,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:59:50,421 INFO L262 TraceCheckSpWp]: Trace formula consists of 2745 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 08:59:50,425 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 08:59:50,497 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 512 trivial. 0 not checked. [2023-11-23 08:59:50,497 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 08:59:50,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 08:59:50,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071171036] [2023-11-23 08:59:50,497 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 08:59:50,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223681939] [2023-11-23 08:59:50,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223681939] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 08:59:50,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 08:59:50,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 08:59:50,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823330005] [2023-11-23 08:59:50,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 08:59:50,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 08:59:50,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 08:59:50,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 08:59:50,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 08:59:50,501 INFO L87 Difference]: Start difference. First operand 345 states and 467 transitions. Second operand has 5 states, 4 states have (on average 11.0) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 3 states have call predecessors, (22), 2 states have call successors, (22) [2023-11-23 08:59:50,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 08:59:50,945 INFO L93 Difference]: Finished difference Result 551 states and 753 transitions. [2023-11-23 08:59:50,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 08:59:50,946 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 11.0) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 3 states have call predecessors, (22), 2 states have call successors, (22) Word has length 157 [2023-11-23 08:59:50,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 08:59:50,948 INFO L225 Difference]: With dead ends: 551 [2023-11-23 08:59:50,948 INFO L226 Difference]: Without dead ends: 347 [2023-11-23 08:59:50,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-23 08:59:50,950 INFO L413 NwaCegarLoop]: 231 mSDtfsCounter, 1 mSDsluCounter, 684 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 915 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 08:59:50,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 915 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 08:59:50,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2023-11-23 08:59:50,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 347. [2023-11-23 08:59:50,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 226 states have (on average 1.247787610619469) internal successors, (282), 231 states have internal predecessors, (282), 88 states have call successors, (88), 31 states have call predecessors, (88), 32 states have return successors, (99), 84 states have call predecessors, (99), 84 states have call successors, (99) [2023-11-23 08:59:50,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 469 transitions. [2023-11-23 08:59:50,969 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 469 transitions. Word has length 157 [2023-11-23 08:59:50,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 08:59:50,969 INFO L495 AbstractCegarLoop]: Abstraction has 347 states and 469 transitions. [2023-11-23 08:59:50,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 11.0) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 3 states have call predecessors, (22), 2 states have call successors, (22) [2023-11-23 08:59:50,970 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 469 transitions. [2023-11-23 08:59:50,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2023-11-23 08:59:50,971 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 08:59:50,971 INFO L195 NwaCegarLoop]: trace histogram [20, 12, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-11-23 08:59:51,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-23 08:59:51,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-23 08:59:51,184 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 08:59:51,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 08:59:51,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1255060228, now seen corresponding path program 1 times [2023-11-23 08:59:51,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 08:59:51,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687205529] [2023-11-23 08:59:51,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:59:51,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 08:59:51,263 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 08:59:51,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [398374776] [2023-11-23 08:59:51,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:59:51,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 08:59:51,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 08:59:51,268 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 08:59:51,290 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 08:59:52,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:59:52,193 INFO L262 TraceCheckSpWp]: Trace formula consists of 2744 conjuncts, 58 conjunts are in the unsatisfiable core [2023-11-23 08:59:52,197 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 08:59:53,105 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 266 proven. 55 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2023-11-23 08:59:53,105 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 08:59:55,838 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2023-11-23 08:59:55,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 08:59:55,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687205529] [2023-11-23 08:59:55,838 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 08:59:55,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398374776] [2023-11-23 08:59:55,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398374776] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 08:59:55,840 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 08:59:55,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2023-11-23 08:59:55,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924282808] [2023-11-23 08:59:55,840 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 08:59:55,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-23 08:59:55,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 08:59:55,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-23 08:59:55,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=800, Unknown=0, NotChecked=0, Total=930 [2023-11-23 08:59:55,843 INFO L87 Difference]: Start difference. First operand 347 states and 469 transitions. Second operand has 31 states, 29 states have (on average 3.3793103448275863) internal successors, (98), 31 states have internal predecessors, (98), 6 states have call successors, (38), 2 states have call predecessors, (38), 5 states have return successors, (38), 6 states have call predecessors, (38), 6 states have call successors, (38) [2023-11-23 09:00:01,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 09:00:01,007 INFO L93 Difference]: Finished difference Result 666 states and 900 transitions. [2023-11-23 09:00:01,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-23 09:00:01,013 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 3.3793103448275863) internal successors, (98), 31 states have internal predecessors, (98), 6 states have call successors, (38), 2 states have call predecessors, (38), 5 states have return successors, (38), 6 states have call predecessors, (38), 6 states have call successors, (38) Word has length 161 [2023-11-23 09:00:01,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 09:00:01,015 INFO L225 Difference]: With dead ends: 666 [2023-11-23 09:00:01,015 INFO L226 Difference]: Without dead ends: 348 [2023-11-23 09:00:01,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=185, Invalid=1075, Unknown=0, NotChecked=0, Total=1260 [2023-11-23 09:00:01,018 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 11 mSDsluCounter, 3760 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 3985 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2023-11-23 09:00:01,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 3985 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 622 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2023-11-23 09:00:01,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2023-11-23 09:00:01,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 348. [2023-11-23 09:00:01,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 227 states have (on average 1.2466960352422907) internal successors, (283), 232 states have internal predecessors, (283), 88 states have call successors, (88), 31 states have call predecessors, (88), 32 states have return successors, (99), 84 states have call predecessors, (99), 84 states have call successors, (99) [2023-11-23 09:00:01,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 470 transitions. [2023-11-23 09:00:01,039 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 470 transitions. Word has length 161 [2023-11-23 09:00:01,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 09:00:01,039 INFO L495 AbstractCegarLoop]: Abstraction has 348 states and 470 transitions. [2023-11-23 09:00:01,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 3.3793103448275863) internal successors, (98), 31 states have internal predecessors, (98), 6 states have call successors, (38), 2 states have call predecessors, (38), 5 states have return successors, (38), 6 states have call predecessors, (38), 6 states have call successors, (38) [2023-11-23 09:00:01,040 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 470 transitions. [2023-11-23 09:00:01,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2023-11-23 09:00:01,040 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 09:00:01,041 INFO L195 NwaCegarLoop]: trace histogram [22, 12, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 09:00:01,072 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 09:00:01,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-23 09:00:01,270 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 09:00:01,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 09:00:01,270 INFO L85 PathProgramCache]: Analyzing trace with hash 916838474, now seen corresponding path program 2 times [2023-11-23 09:00:01,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 09:00:01,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455079489] [2023-11-23 09:00:01,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 09:00:01,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 09:00:01,345 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 09:00:01,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [328169724] [2023-11-23 09:00:01,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 09:00:01,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 09:00:01,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 09:00:01,347 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 09:00:01,365 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 09:00:03,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 09:00:03,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 09:00:03,073 INFO L262 TraceCheckSpWp]: Trace formula consists of 2782 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-23 09:00:03,078 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 09:00:04,049 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 158 proven. 66 refuted. 0 times theorem prover too weak. 335 trivial. 0 not checked. [2023-11-23 09:00:04,049 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 09:00:05,780 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 152 proven. 66 refuted. 0 times theorem prover too weak. 341 trivial. 0 not checked. [2023-11-23 09:00:05,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 09:00:05,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455079489] [2023-11-23 09:00:05,781 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 09:00:05,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328169724] [2023-11-23 09:00:05,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328169724] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 09:00:05,781 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 09:00:05,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 33 [2023-11-23 09:00:05,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489725579] [2023-11-23 09:00:05,782 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 09:00:05,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-23 09:00:05,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 09:00:05,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-23 09:00:05,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=873, Unknown=0, NotChecked=0, Total=1056 [2023-11-23 09:00:05,783 INFO L87 Difference]: Start difference. First operand 348 states and 470 transitions. Second operand has 33 states, 31 states have (on average 2.870967741935484) internal successors, (89), 33 states have internal predecessors, (89), 6 states have call successors, (32), 2 states have call predecessors, (32), 5 states have return successors, (33), 6 states have call predecessors, (33), 6 states have call successors, (33) [2023-11-23 09:00:10,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 09:00:10,003 INFO L93 Difference]: Finished difference Result 668 states and 902 transitions. [2023-11-23 09:00:10,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-23 09:00:10,004 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 2.870967741935484) internal successors, (89), 33 states have internal predecessors, (89), 6 states have call successors, (32), 2 states have call predecessors, (32), 5 states have return successors, (33), 6 states have call predecessors, (33), 6 states have call successors, (33) Word has length 163 [2023-11-23 09:00:10,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 09:00:10,018 INFO L225 Difference]: With dead ends: 668 [2023-11-23 09:00:10,021 INFO L226 Difference]: Without dead ends: 349 [2023-11-23 09:00:10,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 293 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=225, Invalid=1035, Unknown=0, NotChecked=0, Total=1260 [2023-11-23 09:00:10,023 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 16 mSDsluCounter, 3758 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 3983 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2023-11-23 09:00:10,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 3983 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2023-11-23 09:00:10,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2023-11-23 09:00:10,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 349. [2023-11-23 09:00:10,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 228 states have (on average 1.2456140350877194) internal successors, (284), 233 states have internal predecessors, (284), 88 states have call successors, (88), 31 states have call predecessors, (88), 32 states have return successors, (99), 84 states have call predecessors, (99), 84 states have call successors, (99) [2023-11-23 09:00:10,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 471 transitions. [2023-11-23 09:00:10,080 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 471 transitions. Word has length 163 [2023-11-23 09:00:10,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 09:00:10,080 INFO L495 AbstractCegarLoop]: Abstraction has 349 states and 471 transitions. [2023-11-23 09:00:10,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 2.870967741935484) internal successors, (89), 33 states have internal predecessors, (89), 6 states have call successors, (32), 2 states have call predecessors, (32), 5 states have return successors, (33), 6 states have call predecessors, (33), 6 states have call successors, (33) [2023-11-23 09:00:10,081 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 471 transitions. [2023-11-23 09:00:10,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2023-11-23 09:00:10,081 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 09:00:10,082 INFO L195 NwaCegarLoop]: trace histogram [24, 12, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 09:00:10,131 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 09:00:10,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-23 09:00:10,295 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 09:00:10,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 09:00:10,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1359766404, now seen corresponding path program 3 times [2023-11-23 09:00:10,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 09:00:10,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939387624] [2023-11-23 09:00:10,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 09:00:10,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 09:00:10,454 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 09:00:10,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1628421809] [2023-11-23 09:00:10,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 09:00:10,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 09:00:10,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 09:00:10,465 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 09:00:10,528 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 09:01:52,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-11-23 09:01:52,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 09:01:52,467 INFO L262 TraceCheckSpWp]: Trace formula consists of 2421 conjuncts, 128 conjunts are in the unsatisfiable core [2023-11-23 09:01:52,474 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 09:01:52,866 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-23 09:01:53,060 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 68 [2023-11-23 09:01:53,090 INFO L349 Elim1Store]: treesize reduction 23, result has 4.2 percent of original size [2023-11-23 09:01:53,090 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 104 [2023-11-23 09:01:53,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 09:01:53,305 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-23 09:01:53,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 38 [2023-11-23 09:01:54,100 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 68 [2023-11-23 09:01:54,122 INFO L349 Elim1Store]: treesize reduction 23, result has 4.2 percent of original size [2023-11-23 09:01:54,123 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 104 [2023-11-23 09:01:54,178 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 10 [2023-11-23 09:01:54,733 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 68 [2023-11-23 09:01:54,765 INFO L349 Elim1Store]: treesize reduction 23, result has 4.2 percent of original size [2023-11-23 09:01:54,766 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 104 [2023-11-23 09:01:54,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 09:01:54,928 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-23 09:01:54,928 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 38 [2023-11-23 09:01:55,841 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 68 [2023-11-23 09:01:55,902 INFO L349 Elim1Store]: treesize reduction 23, result has 4.2 percent of original size [2023-11-23 09:01:55,903 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 104 [2023-11-23 09:01:55,994 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 8 [2023-11-23 09:01:56,535 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 68 [2023-11-23 09:01:56,554 INFO L349 Elim1Store]: treesize reduction 23, result has 4.2 percent of original size [2023-11-23 09:01:56,555 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 104 [2023-11-23 09:01:56,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 09:01:56,866 INFO L349 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2023-11-23 09:01:56,867 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 27 [2023-11-23 09:01:56,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 09:01:56,970 INFO L349 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2023-11-23 09:01:56,971 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 31 [2023-11-23 09:01:57,157 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 68 [2023-11-23 09:01:57,178 INFO L349 Elim1Store]: treesize reduction 23, result has 4.2 percent of original size [2023-11-23 09:01:57,178 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 104 [2023-11-23 09:01:57,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 09:01:57,427 INFO L349 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2023-11-23 09:01:57,428 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 42 [2023-11-23 09:01:57,712 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 68 [2023-11-23 09:01:57,731 INFO L349 Elim1Store]: treesize reduction 23, result has 4.2 percent of original size [2023-11-23 09:01:57,732 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 104 [2023-11-23 09:01:57,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 09:01:57,828 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-23 09:01:57,828 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 38 [2023-11-23 09:01:58,273 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 68 [2023-11-23 09:01:58,289 INFO L349 Elim1Store]: treesize reduction 23, result has 4.2 percent of original size [2023-11-23 09:01:58,289 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 104 [2023-11-23 09:01:58,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 09:01:58,450 INFO L349 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2023-11-23 09:01:58,451 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 108 treesize of output 67 [2023-11-23 09:01:58,769 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 68 [2023-11-23 09:01:58,803 INFO L349 Elim1Store]: treesize reduction 23, result has 4.2 percent of original size [2023-11-23 09:01:58,803 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 104 [2023-11-23 09:01:59,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 09:01:59,109 INFO L349 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2023-11-23 09:01:59,109 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 22 [2023-11-23 09:01:59,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 09:01:59,199 INFO L349 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2023-11-23 09:01:59,199 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 24 [2023-11-23 09:01:59,359 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 68 [2023-11-23 09:01:59,392 INFO L349 Elim1Store]: treesize reduction 23, result has 4.2 percent of original size [2023-11-23 09:01:59,392 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 104 [2023-11-23 09:01:59,467 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 10 [2023-11-23 09:01:59,957 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 68 [2023-11-23 09:01:59,972 INFO L349 Elim1Store]: treesize reduction 23, result has 4.2 percent of original size [2023-11-23 09:01:59,973 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 104 [2023-11-23 09:02:00,145 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 36 [2023-11-23 09:02:04,032 INFO L134 CoverageAnalysis]: Checked inductivity of 608 backedges. 182 proven. 23 refuted. 0 times theorem prover too weak. 403 trivial. 0 not checked. [2023-11-23 09:02:04,033 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 09:02:06,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 09:02:06,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939387624] [2023-11-23 09:02:06,682 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 09:02:06,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628421809] [2023-11-23 09:02:06,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628421809] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 09:02:06,682 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-23 09:02:06,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2023-11-23 09:02:06,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500729282] [2023-11-23 09:02:06,683 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-23 09:02:06,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-23 09:02:06,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 09:02:06,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-23 09:02:06,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2023-11-23 09:02:06,684 INFO L87 Difference]: Start difference. First operand 349 states and 471 transitions. Second operand has 16 states, 14 states have (on average 4.071428571428571) internal successors, (57), 15 states have internal predecessors, (57), 7 states have call successors, (27), 4 states have call predecessors, (27), 5 states have return successors, (26), 6 states have call predecessors, (26), 6 states have call successors, (26) Killed by 15